./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem03_label39.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c8fc-fe5c-4a90-9515-1e69d4310de2/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c8fc-fe5c-4a90-9515-1e69d4310de2/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c8fc-fe5c-4a90-9515-1e69d4310de2/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c8fc-fe5c-4a90-9515-1e69d4310de2/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label39.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c8fc-fe5c-4a90-9515-1e69d4310de2/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c8fc-fe5c-4a90-9515-1e69d4310de2/bin/utaipan-EQgc7hIp5V --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 e75b25accfa51338058ad16425748718d01a5d94bd667d18c22ba63a9d75c3da --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:40:59,167 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:40:59,170 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:40:59,223 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:40:59,224 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:40:59,228 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:40:59,230 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:40:59,234 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:40:59,236 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:40:59,242 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:40:59,243 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:40:59,245 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:40:59,246 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:40:59,248 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:40:59,251 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:40:59,255 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:40:59,257 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:40:59,258 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:40:59,264 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:40:59,272 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:40:59,274 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:40:59,276 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:40:59,279 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:40:59,280 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:40:59,289 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:40:59,290 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:40:59,290 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:40:59,292 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:40:59,293 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:40:59,294 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:40:59,295 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:40:59,295 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:40:59,297 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:40:59,299 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:40:59,300 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:40:59,301 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:40:59,301 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:40:59,302 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:40:59,302 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:40:59,303 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:40:59,303 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:40:59,304 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c8fc-fe5c-4a90-9515-1e69d4310de2/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 02:40:59,348 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:40:59,349 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:40:59,349 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:40:59,350 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:40:59,357 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:40:59,357 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:40:59,358 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:40:59,358 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:40:59,358 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:40:59,358 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:40:59,359 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:40:59,360 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:40:59,360 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:40:59,360 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:40:59,360 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:40:59,361 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:40:59,361 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:40:59,361 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:40:59,362 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:40:59,363 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 02:40:59,363 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:40:59,363 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 02:40:59,363 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:40:59,364 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:40:59,364 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:40:59,364 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:40:59,366 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 02:40:59,366 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:40:59,366 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:40:59,366 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:40:59,367 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:40:59,367 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:40:59,367 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:40:59,368 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:40:59,368 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:40:59,368 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:40:59,368 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:40:59,368 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:40:59,369 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:40:59,369 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:40:59,369 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:40:59,369 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_1304c8fc-fe5c-4a90-9515-1e69d4310de2/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c8fc-fe5c-4a90-9515-1e69d4310de2/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e75b25accfa51338058ad16425748718d01a5d94bd667d18c22ba63a9d75c3da [2021-11-23 02:40:59,619 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:40:59,642 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:40:59,644 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:40:59,645 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:40:59,647 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:40:59,648 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c8fc-fe5c-4a90-9515-1e69d4310de2/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/eca-rers2012/Problem03_label39.c [2021-11-23 02:40:59,732 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c8fc-fe5c-4a90-9515-1e69d4310de2/bin/utaipan-EQgc7hIp5V/data/7bad66abd/60d7a2822e784686aab46984a9172f89/FLAGa13c27f48 [2021-11-23 02:41:00,432 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:41:00,432 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c8fc-fe5c-4a90-9515-1e69d4310de2/sv-benchmarks/c/eca-rers2012/Problem03_label39.c [2021-11-23 02:41:00,462 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c8fc-fe5c-4a90-9515-1e69d4310de2/bin/utaipan-EQgc7hIp5V/data/7bad66abd/60d7a2822e784686aab46984a9172f89/FLAGa13c27f48 [2021-11-23 02:41:00,629 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c8fc-fe5c-4a90-9515-1e69d4310de2/bin/utaipan-EQgc7hIp5V/data/7bad66abd/60d7a2822e784686aab46984a9172f89 [2021-11-23 02:41:00,631 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:41:00,634 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:41:00,637 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:41:00,638 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:41:00,643 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:41:00,643 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:41:00" (1/1) ... [2021-11-23 02:41:00,644 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e2d9d21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:41:00, skipping insertion in model container [2021-11-23 02:41:00,644 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:41:00" (1/1) ... [2021-11-23 02:41:00,651 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:41:00,762 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:41:01,484 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_1304c8fc-fe5c-4a90-9515-1e69d4310de2/sv-benchmarks/c/eca-rers2012/Problem03_label39.c[54057,54070] [2021-11-23 02:41:01,529 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:41:01,539 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:41:01,777 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_1304c8fc-fe5c-4a90-9515-1e69d4310de2/sv-benchmarks/c/eca-rers2012/Problem03_label39.c[54057,54070] [2021-11-23 02:41:01,796 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:41:01,816 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:41:01,816 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:41:01 WrapperNode [2021-11-23 02:41:01,817 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:41:01,818 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:41:01,818 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:41:01,818 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:41:01,826 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:41:01" (1/1) ... [2021-11-23 02:41:01,862 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:41:01" (1/1) ... [2021-11-23 02:41:01,972 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2021-11-23 02:41:01,973 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:41:01,974 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:41:01,974 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:41:01,974 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:41:01,983 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:41:01" (1/1) ... [2021-11-23 02:41:01,984 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:41:01" (1/1) ... [2021-11-23 02:41:01,993 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:41:01" (1/1) ... [2021-11-23 02:41:01,994 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:41:01" (1/1) ... [2021-11-23 02:41:02,066 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:41:01" (1/1) ... [2021-11-23 02:41:02,078 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:41:01" (1/1) ... [2021-11-23 02:41:02,103 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:41:01" (1/1) ... [2021-11-23 02:41:02,123 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:41:02,124 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:41:02,124 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:41:02,124 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:41:02,126 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:41:01" (1/1) ... [2021-11-23 02:41:02,133 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:41:02,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c8fc-fe5c-4a90-9515-1e69d4310de2/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:41:02,154 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c8fc-fe5c-4a90-9515-1e69d4310de2/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:41:02,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c8fc-fe5c-4a90-9515-1e69d4310de2/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:41:02,191 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:41:02,191 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:41:02,191 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:41:02,192 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:41:02,269 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:41:02,271 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:41:03,966 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:41:04,221 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:41:04,221 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 02:41:04,224 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:41:04 BoogieIcfgContainer [2021-11-23 02:41:04,224 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:41:04,226 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:41:04,226 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:41:04,229 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:41:04,230 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:41:00" (1/3) ... [2021-11-23 02:41:04,231 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a7af365 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:41:04, skipping insertion in model container [2021-11-23 02:41:04,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:41:01" (2/3) ... [2021-11-23 02:41:04,231 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a7af365 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:41:04, skipping insertion in model container [2021-11-23 02:41:04,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:41:04" (3/3) ... [2021-11-23 02:41:04,233 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label39.c [2021-11-23 02:41:04,238 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:41:04,238 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 02:41:04,287 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:41:04,294 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 [2021-11-23 02:41:04,295 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 02:41:04,313 INFO L276 IsEmpty]: Start isEmpty. Operand has 148 states, 146 states have (on average 1.9726027397260273) internal successors, (288), 147 states have internal predecessors, (288), 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) [2021-11-23 02:41:04,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-23 02:41:04,328 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:41:04,329 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:41:04,329 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:41:04,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:41:04,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1724868616, now seen corresponding path program 1 times [2021-11-23 02:41:04,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:41:04,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421891861] [2021-11-23 02:41:04,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:41:04,346 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:41:04,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:41:04,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:41:04,978 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:41:04,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421891861] [2021-11-23 02:41:04,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421891861] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:41:04,980 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:41:04,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 02:41:04,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991342429] [2021-11-23 02:41:04,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:41:04,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:41:04,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:41:05,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:41:05,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:41:05,033 INFO L87 Difference]: Start difference. First operand has 148 states, 146 states have (on average 1.9726027397260273) internal successors, (288), 147 states have internal predecessors, (288), 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) Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 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) [2021-11-23 02:41:06,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:41:06,086 INFO L93 Difference]: Finished difference Result 440 states and 860 transitions. [2021-11-23 02:41:06,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:41:06,090 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 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 143 [2021-11-23 02:41:06,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:41:06,112 INFO L225 Difference]: With dead ends: 440 [2021-11-23 02:41:06,112 INFO L226 Difference]: Without dead ends: 289 [2021-11-23 02:41:06,117 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 [2021-11-23 02:41:06,122 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 28 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-23 02:41:06,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 35 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 475 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-23 02:41:06,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-11-23 02:41:06,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 289. [2021-11-23 02:41:06,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 1.8680555555555556) internal successors, (538), 288 states have internal predecessors, (538), 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) [2021-11-23 02:41:06,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 538 transitions. [2021-11-23 02:41:06,216 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 538 transitions. Word has length 143 [2021-11-23 02:41:06,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:41:06,220 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 538 transitions. [2021-11-23 02:41:06,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 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) [2021-11-23 02:41:06,222 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 538 transitions. [2021-11-23 02:41:06,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-23 02:41:06,237 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:41:06,237 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:41:06,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 02:41:06,239 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:41:06,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:41:06,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1763834191, now seen corresponding path program 1 times [2021-11-23 02:41:06,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:41:06,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119739812] [2021-11-23 02:41:06,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:41:06,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:41:06,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:41:06,385 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:41:06,387 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:41:06,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119739812] [2021-11-23 02:41:06,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119739812] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:41:06,389 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:41:06,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 02:41:06,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853770530] [2021-11-23 02:41:06,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:41:06,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:41:06,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:41:06,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:41:06,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:41:06,396 INFO L87 Difference]: Start difference. First operand 289 states and 538 transitions. Second operand has 3 states, 3 states have (on average 49.0) internal successors, (147), 2 states have internal predecessors, (147), 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) [2021-11-23 02:41:07,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:41:07,081 INFO L93 Difference]: Finished difference Result 865 states and 1612 transitions. [2021-11-23 02:41:07,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:41:07,086 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 2 states have internal predecessors, (147), 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 147 [2021-11-23 02:41:07,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:41:07,090 INFO L225 Difference]: With dead ends: 865 [2021-11-23 02:41:07,091 INFO L226 Difference]: Without dead ends: 577 [2021-11-23 02:41:07,093 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 [2021-11-23 02:41:07,094 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 180 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:41:07,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 38 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-23 02:41:07,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-11-23 02:41:07,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 575. [2021-11-23 02:41:07,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 1.8414634146341464) internal successors, (1057), 574 states have internal predecessors, (1057), 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) [2021-11-23 02:41:07,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 1057 transitions. [2021-11-23 02:41:07,125 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 1057 transitions. Word has length 147 [2021-11-23 02:41:07,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:41:07,125 INFO L470 AbstractCegarLoop]: Abstraction has 575 states and 1057 transitions. [2021-11-23 02:41:07,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 2 states have internal predecessors, (147), 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) [2021-11-23 02:41:07,126 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 1057 transitions. [2021-11-23 02:41:07,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-11-23 02:41:07,147 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:41:07,147 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:41:07,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 02:41:07,148 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:41:07,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:41:07,149 INFO L85 PathProgramCache]: Analyzing trace with hash -688089902, now seen corresponding path program 1 times [2021-11-23 02:41:07,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:41:07,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949993391] [2021-11-23 02:41:07,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:41:07,159 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:41:07,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:41:07,237 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:41:07,237 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:41:07,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949993391] [2021-11-23 02:41:07,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949993391] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:41:07,238 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:41:07,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 02:41:07,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209162517] [2021-11-23 02:41:07,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:41:07,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:41:07,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:41:07,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:41:07,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:41:07,240 INFO L87 Difference]: Start difference. First operand 575 states and 1057 transitions. Second operand has 3 states, 3 states have (on average 51.0) internal successors, (153), 2 states have internal predecessors, (153), 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) [2021-11-23 02:41:07,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:41:07,961 INFO L93 Difference]: Finished difference Result 1721 states and 3168 transitions. [2021-11-23 02:41:07,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:41:07,962 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 2 states have internal predecessors, (153), 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 153 [2021-11-23 02:41:07,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:41:07,971 INFO L225 Difference]: With dead ends: 1721 [2021-11-23 02:41:07,972 INFO L226 Difference]: Without dead ends: 1147 [2021-11-23 02:41:07,975 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 [2021-11-23 02:41:07,976 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 157 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:41:07,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 37 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 457 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-23 02:41:07,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2021-11-23 02:41:08,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 1147. [2021-11-23 02:41:08,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1147 states, 1146 states have (on average 1.7260034904013961) internal successors, (1978), 1146 states have internal predecessors, (1978), 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) [2021-11-23 02:41:08,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 1978 transitions. [2021-11-23 02:41:08,021 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 1978 transitions. Word has length 153 [2021-11-23 02:41:08,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:41:08,022 INFO L470 AbstractCegarLoop]: Abstraction has 1147 states and 1978 transitions. [2021-11-23 02:41:08,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 2 states have internal predecessors, (153), 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) [2021-11-23 02:41:08,023 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 1978 transitions. [2021-11-23 02:41:08,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-23 02:41:08,027 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:41:08,027 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:41:08,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 02:41:08,028 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:41:08,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:41:08,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1826146994, now seen corresponding path program 1 times [2021-11-23 02:41:08,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:41:08,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340230084] [2021-11-23 02:41:08,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:41:08,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:41:08,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:41:08,124 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:41:08,125 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:41:08,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340230084] [2021-11-23 02:41:08,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340230084] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:41:08,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222288460] [2021-11-23 02:41:08,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:41:08,126 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:41:08,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c8fc-fe5c-4a90-9515-1e69d4310de2/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:41:08,128 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c8fc-fe5c-4a90-9515-1e69d4310de2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:41:08,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c8fc-fe5c-4a90-9515-1e69d4310de2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 02:41:08,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:41:08,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 02:41:08,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:41:08,546 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 02:41:08,546 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:41:08,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222288460] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:41:08,547 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:41:08,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-11-23 02:41:08,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340231965] [2021-11-23 02:41:08,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:41:08,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:41:08,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:41:08,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:41:08,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:41:08,559 INFO L87 Difference]: Start difference. First operand 1147 states and 1978 transitions. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 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) [2021-11-23 02:41:09,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:41:09,311 INFO L93 Difference]: Finished difference Result 3439 states and 5932 transitions. [2021-11-23 02:41:09,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:41:09,312 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 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 154 [2021-11-23 02:41:09,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:41:09,364 INFO L225 Difference]: With dead ends: 3439 [2021-11-23 02:41:09,364 INFO L226 Difference]: Without dead ends: 2293 [2021-11-23 02:41:09,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:41:09,368 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 162 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:41:09,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 48 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-23 02:41:09,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2293 states. [2021-11-23 02:41:09,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2293 to 1719. [2021-11-23 02:41:09,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1719 states, 1718 states have (on average 1.649592549476135) internal successors, (2834), 1718 states have internal predecessors, (2834), 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) [2021-11-23 02:41:09,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1719 states to 1719 states and 2834 transitions. [2021-11-23 02:41:09,433 INFO L78 Accepts]: Start accepts. Automaton has 1719 states and 2834 transitions. Word has length 154 [2021-11-23 02:41:09,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:41:09,434 INFO L470 AbstractCegarLoop]: Abstraction has 1719 states and 2834 transitions. [2021-11-23 02:41:09,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 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) [2021-11-23 02:41:09,435 INFO L276 IsEmpty]: Start isEmpty. Operand 1719 states and 2834 transitions. [2021-11-23 02:41:09,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-11-23 02:41:09,440 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:41:09,441 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:41:09,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c8fc-fe5c-4a90-9515-1e69d4310de2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 02:41:09,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c8fc-fe5c-4a90-9515-1e69d4310de2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:41:09,655 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:41:09,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:41:09,656 INFO L85 PathProgramCache]: Analyzing trace with hash 630951925, now seen corresponding path program 1 times [2021-11-23 02:41:09,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:41:09,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052274109] [2021-11-23 02:41:09,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:41:09,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:41:09,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:41:09,743 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 02:41:09,743 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:41:09,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052274109] [2021-11-23 02:41:09,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052274109] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:41:09,744 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:41:09,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 02:41:09,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814380297] [2021-11-23 02:41:09,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:41:09,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:41:09,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:41:09,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:41:09,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:41:09,754 INFO L87 Difference]: Start difference. First operand 1719 states and 2834 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 2 states have internal predecessors, (155), 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) [2021-11-23 02:41:10,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:41:10,555 INFO L93 Difference]: Finished difference Result 5153 states and 8499 transitions. [2021-11-23 02:41:10,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:41:10,556 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 2 states have internal predecessors, (155), 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 160 [2021-11-23 02:41:10,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:41:10,576 INFO L225 Difference]: With dead ends: 5153 [2021-11-23 02:41:10,577 INFO L226 Difference]: Without dead ends: 3435 [2021-11-23 02:41:10,580 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 [2021-11-23 02:41:10,581 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 142 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:41:10,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 103 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-23 02:41:10,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3435 states. [2021-11-23 02:41:10,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3435 to 2863. [2021-11-23 02:41:10,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2863 states, 2862 states have (on average 1.4633123689727463) internal successors, (4188), 2862 states have internal predecessors, (4188), 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) [2021-11-23 02:41:10,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2863 states to 2863 states and 4188 transitions. [2021-11-23 02:41:10,725 INFO L78 Accepts]: Start accepts. Automaton has 2863 states and 4188 transitions. Word has length 160 [2021-11-23 02:41:10,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:41:10,726 INFO L470 AbstractCegarLoop]: Abstraction has 2863 states and 4188 transitions. [2021-11-23 02:41:10,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 2 states have internal predecessors, (155), 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) [2021-11-23 02:41:10,726 INFO L276 IsEmpty]: Start isEmpty. Operand 2863 states and 4188 transitions. [2021-11-23 02:41:10,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-11-23 02:41:10,732 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:41:10,733 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:41:10,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 02:41:10,733 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:41:10,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:41:10,734 INFO L85 PathProgramCache]: Analyzing trace with hash 37004241, now seen corresponding path program 1 times [2021-11-23 02:41:10,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:41:10,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680647869] [2021-11-23 02:41:10,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:41:10,735 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:41:10,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:41:10,802 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 02:41:10,802 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:41:10,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680647869] [2021-11-23 02:41:10,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680647869] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:41:10,803 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:41:10,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:41:10,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35546328] [2021-11-23 02:41:10,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:41:10,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:41:10,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:41:10,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:41:10,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:41:10,805 INFO L87 Difference]: Start difference. First operand 2863 states and 4188 transitions. Second operand has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 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) [2021-11-23 02:41:11,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:41:11,567 INFO L93 Difference]: Finished difference Result 8156 states and 12053 transitions. [2021-11-23 02:41:11,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:41:11,568 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 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 162 [2021-11-23 02:41:11,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:41:11,599 INFO L225 Difference]: With dead ends: 8156 [2021-11-23 02:41:11,599 INFO L226 Difference]: Without dead ends: 5294 [2021-11-23 02:41:11,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:41:11,605 INFO L933 BasicCegarLoop]: 228 mSDtfsCounter, 143 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:41:11,605 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 231 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-23 02:41:11,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5294 states. [2021-11-23 02:41:11,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5294 to 5294. [2021-11-23 02:41:11,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5294 states, 5293 states have (on average 1.3659550349518232) internal successors, (7230), 5293 states have internal predecessors, (7230), 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) [2021-11-23 02:41:11,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5294 states to 5294 states and 7230 transitions. [2021-11-23 02:41:11,797 INFO L78 Accepts]: Start accepts. Automaton has 5294 states and 7230 transitions. Word has length 162 [2021-11-23 02:41:11,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:41:11,797 INFO L470 AbstractCegarLoop]: Abstraction has 5294 states and 7230 transitions. [2021-11-23 02:41:11,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 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) [2021-11-23 02:41:11,798 INFO L276 IsEmpty]: Start isEmpty. Operand 5294 states and 7230 transitions. [2021-11-23 02:41:11,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-11-23 02:41:11,807 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:41:11,808 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:41:11,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 02:41:11,808 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:41:11,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:41:11,809 INFO L85 PathProgramCache]: Analyzing trace with hash -1836482210, now seen corresponding path program 1 times [2021-11-23 02:41:11,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:41:11,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884785623] [2021-11-23 02:41:11,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:41:11,811 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:41:11,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:41:11,898 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:41:11,899 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:41:11,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884785623] [2021-11-23 02:41:11,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884785623] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:41:11,899 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:41:11,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 02:41:11,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301406348] [2021-11-23 02:41:11,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:41:11,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:41:11,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:41:11,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:41:11,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:41:11,904 INFO L87 Difference]: Start difference. First operand 5294 states and 7230 transitions. Second operand has 3 states, 3 states have (on average 57.0) internal successors, (171), 2 states have internal predecessors, (171), 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) [2021-11-23 02:41:12,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:41:12,663 INFO L93 Difference]: Finished difference Result 12875 states and 17577 transitions. [2021-11-23 02:41:12,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:41:12,663 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 2 states have internal predecessors, (171), 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 171 [2021-11-23 02:41:12,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:41:12,706 INFO L225 Difference]: With dead ends: 12875 [2021-11-23 02:41:12,706 INFO L226 Difference]: Without dead ends: 7582 [2021-11-23 02:41:12,713 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 [2021-11-23 02:41:12,714 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 136 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:41:12,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 49 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-23 02:41:12,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7582 states. [2021-11-23 02:41:12,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7582 to 7582. [2021-11-23 02:41:12,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7582 states, 7581 states have (on average 1.3595831684474344) internal successors, (10307), 7581 states have internal predecessors, (10307), 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) [2021-11-23 02:41:12,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7582 states to 7582 states and 10307 transitions. [2021-11-23 02:41:12,952 INFO L78 Accepts]: Start accepts. Automaton has 7582 states and 10307 transitions. Word has length 171 [2021-11-23 02:41:12,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:41:12,952 INFO L470 AbstractCegarLoop]: Abstraction has 7582 states and 10307 transitions. [2021-11-23 02:41:12,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 2 states have internal predecessors, (171), 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) [2021-11-23 02:41:12,953 INFO L276 IsEmpty]: Start isEmpty. Operand 7582 states and 10307 transitions. [2021-11-23 02:41:12,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-11-23 02:41:12,966 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:41:12,966 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:41:12,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 02:41:12,966 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:41:12,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:41:12,967 INFO L85 PathProgramCache]: Analyzing trace with hash 284023673, now seen corresponding path program 1 times [2021-11-23 02:41:12,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:41:12,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623810657] [2021-11-23 02:41:12,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:41:12,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:41:12,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:41:13,050 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:41:13,050 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:41:13,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623810657] [2021-11-23 02:41:13,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623810657] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:41:13,051 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:41:13,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 02:41:13,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500737462] [2021-11-23 02:41:13,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:41:13,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:41:13,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:41:13,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:41:13,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:41:13,058 INFO L87 Difference]: Start difference. First operand 7582 states and 10307 transitions. Second operand has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 2 states have internal predecessors, (173), 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) [2021-11-23 02:41:13,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:41:13,957 INFO L93 Difference]: Finished difference Result 19312 states and 26710 transitions. [2021-11-23 02:41:13,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:41:13,960 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 2 states have internal predecessors, (173), 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 173 [2021-11-23 02:41:13,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:41:14,024 INFO L225 Difference]: With dead ends: 19312 [2021-11-23 02:41:14,024 INFO L226 Difference]: Without dead ends: 11731 [2021-11-23 02:41:14,034 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 [2021-11-23 02:41:14,035 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 130 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-23 02:41:14,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 124 Invalid, 657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 643 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-23 02:41:14,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11731 states. [2021-11-23 02:41:14,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11731 to 11729. [2021-11-23 02:41:14,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11729 states, 11728 states have (on average 1.3894952251023192) internal successors, (16296), 11728 states have internal predecessors, (16296), 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) [2021-11-23 02:41:14,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11729 states to 11729 states and 16296 transitions. [2021-11-23 02:41:14,373 INFO L78 Accepts]: Start accepts. Automaton has 11729 states and 16296 transitions. Word has length 173 [2021-11-23 02:41:14,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:41:14,374 INFO L470 AbstractCegarLoop]: Abstraction has 11729 states and 16296 transitions. [2021-11-23 02:41:14,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 2 states have internal predecessors, (173), 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) [2021-11-23 02:41:14,375 INFO L276 IsEmpty]: Start isEmpty. Operand 11729 states and 16296 transitions. [2021-11-23 02:41:14,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-11-23 02:41:14,390 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:41:14,391 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:41:14,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 02:41:14,391 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:41:14,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:41:14,392 INFO L85 PathProgramCache]: Analyzing trace with hash 323568559, now seen corresponding path program 1 times [2021-11-23 02:41:14,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:41:14,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552530166] [2021-11-23 02:41:14,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:41:14,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:41:14,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:41:14,488 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:41:14,488 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:41:14,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552530166] [2021-11-23 02:41:14,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552530166] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:41:14,489 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:41:14,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 02:41:14,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077829995] [2021-11-23 02:41:14,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:41:14,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:41:14,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:41:14,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:41:14,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:41:14,492 INFO L87 Difference]: Start difference. First operand 11729 states and 16296 transitions. Second operand has 3 states, 3 states have (on average 59.0) internal successors, (177), 2 states have internal predecessors, (177), 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) [2021-11-23 02:41:15,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:41:15,463 INFO L93 Difference]: Finished difference Result 32468 states and 45347 transitions. [2021-11-23 02:41:15,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:41:15,464 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 2 states have internal predecessors, (177), 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 177 [2021-11-23 02:41:15,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:41:15,507 INFO L225 Difference]: With dead ends: 32468 [2021-11-23 02:41:15,508 INFO L226 Difference]: Without dead ends: 21026 [2021-11-23 02:41:15,521 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 [2021-11-23 02:41:15,524 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 155 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-23 02:41:15,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 110 Invalid, 638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 617 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-23 02:41:15,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21026 states. [2021-11-23 02:41:15,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21026 to 21024. [2021-11-23 02:41:15,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21024 states, 21023 states have (on average 1.3833420539409218) internal successors, (29082), 21023 states have internal predecessors, (29082), 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) [2021-11-23 02:41:16,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21024 states to 21024 states and 29082 transitions. [2021-11-23 02:41:16,075 INFO L78 Accepts]: Start accepts. Automaton has 21024 states and 29082 transitions. Word has length 177 [2021-11-23 02:41:16,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:41:16,076 INFO L470 AbstractCegarLoop]: Abstraction has 21024 states and 29082 transitions. [2021-11-23 02:41:16,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 2 states have internal predecessors, (177), 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) [2021-11-23 02:41:16,076 INFO L276 IsEmpty]: Start isEmpty. Operand 21024 states and 29082 transitions. [2021-11-23 02:41:16,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-11-23 02:41:16,096 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:41:16,097 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:41:16,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 02:41:16,097 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:41:16,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:41:16,098 INFO L85 PathProgramCache]: Analyzing trace with hash -2016770181, now seen corresponding path program 1 times [2021-11-23 02:41:16,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:41:16,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619384351] [2021-11-23 02:41:16,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:41:16,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:41:16,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:41:16,188 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 02:41:16,189 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:41:16,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619384351] [2021-11-23 02:41:16,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619384351] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:41:16,189 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:41:16,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:41:16,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647848314] [2021-11-23 02:41:16,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:41:16,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:41:16,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:41:16,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:41:16,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:41:16,191 INFO L87 Difference]: Start difference. First operand 21024 states and 29082 transitions. Second operand has 4 states, 4 states have (on average 45.75) internal successors, (183), 3 states have internal predecessors, (183), 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) [2021-11-23 02:41:17,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:41:17,601 INFO L93 Difference]: Finished difference Result 51916 states and 72317 transitions. [2021-11-23 02:41:17,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:41:17,602 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.75) internal successors, (183), 3 states have internal predecessors, (183), 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 188 [2021-11-23 02:41:17,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:41:17,672 INFO L225 Difference]: With dead ends: 51916 [2021-11-23 02:41:17,672 INFO L226 Difference]: Without dead ends: 31465 [2021-11-23 02:41:17,694 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:41:17,694 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 330 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 687 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:41:17,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [330 Valid, 271 Invalid, 898 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 687 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-23 02:41:17,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31465 states. [2021-11-23 02:41:18,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31465 to 31463. [2021-11-23 02:41:18,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31463 states, 31462 states have (on average 1.3507405759328714) internal successors, (42497), 31462 states have internal predecessors, (42497), 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) [2021-11-23 02:41:18,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31463 states to 31463 states and 42497 transitions. [2021-11-23 02:41:18,438 INFO L78 Accepts]: Start accepts. Automaton has 31463 states and 42497 transitions. Word has length 188 [2021-11-23 02:41:18,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:41:18,438 INFO L470 AbstractCegarLoop]: Abstraction has 31463 states and 42497 transitions. [2021-11-23 02:41:18,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.75) internal successors, (183), 3 states have internal predecessors, (183), 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) [2021-11-23 02:41:18,439 INFO L276 IsEmpty]: Start isEmpty. Operand 31463 states and 42497 transitions. [2021-11-23 02:41:18,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-11-23 02:41:18,633 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:41:18,633 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:41:18,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-23 02:41:18,634 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:41:18,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:41:18,634 INFO L85 PathProgramCache]: Analyzing trace with hash 571151254, now seen corresponding path program 1 times [2021-11-23 02:41:18,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:41:18,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231349464] [2021-11-23 02:41:18,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:41:18,635 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:41:18,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:41:18,800 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 53 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 02:41:18,801 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:41:18,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231349464] [2021-11-23 02:41:18,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231349464] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:41:18,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299857865] [2021-11-23 02:41:18,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:41:18,802 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:41:18,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c8fc-fe5c-4a90-9515-1e69d4310de2/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:41:18,803 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c8fc-fe5c-4a90-9515-1e69d4310de2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:41:18,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c8fc-fe5c-4a90-9515-1e69d4310de2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 02:41:18,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:41:18,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 02:41:18,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:41:19,364 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-23 02:41:19,364 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:41:19,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299857865] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:41:19,365 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:41:19,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-23 02:41:19,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395699805] [2021-11-23 02:41:19,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:41:19,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:41:19,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:41:19,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:41:19,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:41:19,367 INFO L87 Difference]: Start difference. First operand 31463 states and 42497 transitions. Second operand has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 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) [2021-11-23 02:41:20,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:41:20,597 INFO L93 Difference]: Finished difference Result 69360 states and 94982 transitions. [2021-11-23 02:41:20,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:41:20,597 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 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 191 [2021-11-23 02:41:20,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:41:20,708 INFO L225 Difference]: With dead ends: 69360 [2021-11-23 02:41:20,708 INFO L226 Difference]: Without dead ends: 38470 [2021-11-23 02:41:20,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:41:20,743 INFO L933 BasicCegarLoop]: 254 mSDtfsCounter, 13 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-23 02:41:20,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 258 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-23 02:41:20,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38470 states. [2021-11-23 02:41:21,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38470 to 36754. [2021-11-23 02:41:21,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36754 states, 36753 states have (on average 1.2589448480396157) internal successors, (46270), 36753 states have internal predecessors, (46270), 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) [2021-11-23 02:41:21,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36754 states to 36754 states and 46270 transitions. [2021-11-23 02:41:21,506 INFO L78 Accepts]: Start accepts. Automaton has 36754 states and 46270 transitions. Word has length 191 [2021-11-23 02:41:21,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:41:21,507 INFO L470 AbstractCegarLoop]: Abstraction has 36754 states and 46270 transitions. [2021-11-23 02:41:21,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 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) [2021-11-23 02:41:21,507 INFO L276 IsEmpty]: Start isEmpty. Operand 36754 states and 46270 transitions. [2021-11-23 02:41:21,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2021-11-23 02:41:21,546 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:41:21,546 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:41:21,580 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c8fc-fe5c-4a90-9515-1e69d4310de2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 02:41:21,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c8fc-fe5c-4a90-9515-1e69d4310de2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:41:21,771 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:41:21,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:41:21,772 INFO L85 PathProgramCache]: Analyzing trace with hash 358725772, now seen corresponding path program 1 times [2021-11-23 02:41:21,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:41:21,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493283513] [2021-11-23 02:41:21,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:41:21,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:41:21,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:41:22,048 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 80 proven. 6 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-23 02:41:22,049 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:41:22,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493283513] [2021-11-23 02:41:22,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493283513] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:41:22,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794219956] [2021-11-23 02:41:22,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:41:22,049 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:41:22,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c8fc-fe5c-4a90-9515-1e69d4310de2/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:41:22,050 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c8fc-fe5c-4a90-9515-1e69d4310de2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:41:22,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c8fc-fe5c-4a90-9515-1e69d4310de2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 02:41:22,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:41:22,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:41:22,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:41:22,629 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-23 02:41:22,630 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:41:22,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794219956] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:41:22,630 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:41:22,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-11-23 02:41:22,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174277018] [2021-11-23 02:41:22,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:41:22,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:41:22,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:41:22,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:41:22,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:41:22,633 INFO L87 Difference]: Start difference. First operand 36754 states and 46270 transitions. Second operand has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 2 states have internal predecessors, (178), 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) [2021-11-23 02:41:23,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:41:23,267 INFO L93 Difference]: Finished difference Result 60923 states and 76280 transitions. [2021-11-23 02:41:23,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:41:23,267 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 2 states have internal predecessors, (178), 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 212 [2021-11-23 02:41:23,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:41:23,308 INFO L225 Difference]: With dead ends: 60923 [2021-11-23 02:41:23,308 INFO L226 Difference]: Without dead ends: 24742 [2021-11-23 02:41:23,415 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:41:23,416 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 227 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:41:23,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 4 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 02:41:23,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24742 states. [2021-11-23 02:41:23,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24742 to 24313. [2021-11-23 02:41:23,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24313 states, 24312 states have (on average 1.223593287265548) internal successors, (29748), 24312 states have internal predecessors, (29748), 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) [2021-11-23 02:41:23,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24313 states to 24313 states and 29748 transitions. [2021-11-23 02:41:23,859 INFO L78 Accepts]: Start accepts. Automaton has 24313 states and 29748 transitions. Word has length 212 [2021-11-23 02:41:23,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:41:23,860 INFO L470 AbstractCegarLoop]: Abstraction has 24313 states and 29748 transitions. [2021-11-23 02:41:23,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 2 states have internal predecessors, (178), 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) [2021-11-23 02:41:23,860 INFO L276 IsEmpty]: Start isEmpty. Operand 24313 states and 29748 transitions. [2021-11-23 02:41:23,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2021-11-23 02:41:23,879 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:41:23,880 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:41:23,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c8fc-fe5c-4a90-9515-1e69d4310de2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 02:41:24,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c8fc-fe5c-4a90-9515-1e69d4310de2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:41:24,095 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:41:24,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:41:24,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1791325892, now seen corresponding path program 1 times [2021-11-23 02:41:24,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:41:24,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209765352] [2021-11-23 02:41:24,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:41:24,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:41:24,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:41:24,254 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:41:24,254 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:41:24,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209765352] [2021-11-23 02:41:24,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209765352] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:41:24,255 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:41:24,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 02:41:24,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623741991] [2021-11-23 02:41:24,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:41:24,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:41:24,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:41:24,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:41:24,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:41:24,257 INFO L87 Difference]: Start difference. First operand 24313 states and 29748 transitions. Second operand has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 2 states have internal predecessors, (217), 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) [2021-11-23 02:41:24,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:41:24,997 INFO L93 Difference]: Finished difference Result 47338 states and 58059 transitions. [2021-11-23 02:41:24,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:41:24,997 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 2 states have internal predecessors, (217), 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 217 [2021-11-23 02:41:24,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:41:25,028 INFO L225 Difference]: With dead ends: 47338 [2021-11-23 02:41:25,029 INFO L226 Difference]: Without dead ends: 24313 [2021-11-23 02:41:25,042 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 [2021-11-23 02:41:25,043 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 72 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:41:25,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 103 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 02:41:25,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24313 states. [2021-11-23 02:41:25,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24313 to 24313. [2021-11-23 02:41:25,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24313 states, 24312 states have (on average 1.2234698914116486) internal successors, (29745), 24312 states have internal predecessors, (29745), 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) [2021-11-23 02:41:25,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24313 states to 24313 states and 29745 transitions. [2021-11-23 02:41:25,589 INFO L78 Accepts]: Start accepts. Automaton has 24313 states and 29745 transitions. Word has length 217 [2021-11-23 02:41:25,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:41:25,590 INFO L470 AbstractCegarLoop]: Abstraction has 24313 states and 29745 transitions. [2021-11-23 02:41:25,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 2 states have internal predecessors, (217), 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) [2021-11-23 02:41:25,590 INFO L276 IsEmpty]: Start isEmpty. Operand 24313 states and 29745 transitions. [2021-11-23 02:41:25,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2021-11-23 02:41:25,606 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:41:25,606 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:41:25,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-23 02:41:25,607 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:41:25,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:41:25,607 INFO L85 PathProgramCache]: Analyzing trace with hash -740928971, now seen corresponding path program 1 times [2021-11-23 02:41:25,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:41:25,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064497502] [2021-11-23 02:41:25,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:41:25,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:41:25,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:41:25,717 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:41:25,717 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:41:25,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064497502] [2021-11-23 02:41:25,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064497502] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:41:25,718 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:41:25,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 02:41:25,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47654204] [2021-11-23 02:41:25,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:41:25,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:41:25,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:41:25,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:41:25,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:41:25,720 INFO L87 Difference]: Start difference. First operand 24313 states and 29745 transitions. Second operand has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 2 states have internal predecessors, (218), 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) [2021-11-23 02:41:26,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:41:26,704 INFO L93 Difference]: Finished difference Result 52488 states and 65497 transitions. [2021-11-23 02:41:26,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:41:26,705 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 2 states have internal predecessors, (218), 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 218 [2021-11-23 02:41:26,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:41:26,743 INFO L225 Difference]: With dead ends: 52488 [2021-11-23 02:41:26,743 INFO L226 Difference]: Without dead ends: 32037 [2021-11-23 02:41:26,753 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 [2021-11-23 02:41:26,753 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 86 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:41:26,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 94 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-23 02:41:26,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32037 states. [2021-11-23 02:41:27,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32037 to 30319. [2021-11-23 02:41:27,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30319 states, 30318 states have (on average 1.2580315324229832) internal successors, (38141), 30318 states have internal predecessors, (38141), 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) [2021-11-23 02:41:27,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30319 states to 30319 states and 38141 transitions. [2021-11-23 02:41:27,377 INFO L78 Accepts]: Start accepts. Automaton has 30319 states and 38141 transitions. Word has length 218 [2021-11-23 02:41:27,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:41:27,377 INFO L470 AbstractCegarLoop]: Abstraction has 30319 states and 38141 transitions. [2021-11-23 02:41:27,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 2 states have internal predecessors, (218), 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) [2021-11-23 02:41:27,377 INFO L276 IsEmpty]: Start isEmpty. Operand 30319 states and 38141 transitions. [2021-11-23 02:41:27,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2021-11-23 02:41:27,385 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:41:27,386 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:41:27,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-23 02:41:27,386 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:41:27,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:41:27,386 INFO L85 PathProgramCache]: Analyzing trace with hash 801895440, now seen corresponding path program 1 times [2021-11-23 02:41:27,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:41:27,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486046825] [2021-11-23 02:41:27,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:41:27,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:41:27,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:41:27,474 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 92 proven. 6 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-11-23 02:41:27,474 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:41:27,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486046825] [2021-11-23 02:41:27,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486046825] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:41:27,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154368884] [2021-11-23 02:41:27,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:41:27,475 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:41:27,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c8fc-fe5c-4a90-9515-1e69d4310de2/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:41:27,479 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c8fc-fe5c-4a90-9515-1e69d4310de2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:41:27,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c8fc-fe5c-4a90-9515-1e69d4310de2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 02:41:27,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:41:27,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 534 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 02:41:27,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:41:27,999 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-23 02:41:27,999 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:41:28,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154368884] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:41:28,000 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:41:28,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-23 02:41:28,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98311805] [2021-11-23 02:41:28,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:41:28,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:41:28,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:41:28,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:41:28,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:41:28,002 INFO L87 Difference]: Start difference. First operand 30319 states and 38141 transitions. Second operand has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 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) [2021-11-23 02:41:28,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:41:28,913 INFO L93 Difference]: Finished difference Result 72220 states and 91025 transitions. [2021-11-23 02:41:28,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:41:28,913 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 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 234 [2021-11-23 02:41:28,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:41:28,960 INFO L225 Difference]: With dead ends: 72220 [2021-11-23 02:41:28,960 INFO L226 Difference]: Without dead ends: 42760 [2021-11-23 02:41:28,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:41:28,979 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 32 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:41:28,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 80 Invalid, 556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 510 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-23 02:41:29,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42760 states. [2021-11-23 02:41:29,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42760 to 42331. [2021-11-23 02:41:29,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42331 states, 42330 states have (on average 1.241223718403024) internal successors, (52541), 42330 states have internal predecessors, (52541), 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) [2021-11-23 02:41:29,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42331 states to 42331 states and 52541 transitions. [2021-11-23 02:41:29,651 INFO L78 Accepts]: Start accepts. Automaton has 42331 states and 52541 transitions. Word has length 234 [2021-11-23 02:41:29,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:41:29,652 INFO L470 AbstractCegarLoop]: Abstraction has 42331 states and 52541 transitions. [2021-11-23 02:41:29,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 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) [2021-11-23 02:41:29,652 INFO L276 IsEmpty]: Start isEmpty. Operand 42331 states and 52541 transitions. [2021-11-23 02:41:29,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2021-11-23 02:41:29,677 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:41:29,677 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:41:29,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c8fc-fe5c-4a90-9515-1e69d4310de2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 02:41:29,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c8fc-fe5c-4a90-9515-1e69d4310de2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-23 02:41:29,891 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:41:29,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:41:29,892 INFO L85 PathProgramCache]: Analyzing trace with hash 308258612, now seen corresponding path program 1 times [2021-11-23 02:41:29,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:41:29,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945551336] [2021-11-23 02:41:29,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:41:29,893 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:41:29,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:41:30,033 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 116 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-23 02:41:30,034 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:41:30,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945551336] [2021-11-23 02:41:30,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945551336] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:41:30,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312373388] [2021-11-23 02:41:30,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:41:30,035 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:41:30,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c8fc-fe5c-4a90-9515-1e69d4310de2/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:41:30,039 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c8fc-fe5c-4a90-9515-1e69d4310de2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:41:30,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c8fc-fe5c-4a90-9515-1e69d4310de2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 02:41:30,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:41:30,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 02:41:30,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:41:30,570 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-23 02:41:30,570 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:41:30,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312373388] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:41:30,571 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:41:30,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-11-23 02:41:30,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965437135] [2021-11-23 02:41:30,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:41:30,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:41:30,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:41:30,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:41:30,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:41:30,573 INFO L87 Difference]: Start difference. First operand 42331 states and 52541 transitions. Second operand has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 2 states have internal predecessors, (242), 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) [2021-11-23 02:41:31,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:41:31,227 INFO L93 Difference]: Finished difference Result 111976 states and 138779 transitions. [2021-11-23 02:41:31,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:41:31,227 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 2 states have internal predecessors, (242), 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 257 [2021-11-23 02:41:31,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:41:31,300 INFO L225 Difference]: With dead ends: 111976 [2021-11-23 02:41:31,300 INFO L226 Difference]: Without dead ends: 72935 [2021-11-23 02:41:31,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:41:31,323 INFO L933 BasicCegarLoop]: 192 mSDtfsCounter, 154 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:41:31,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 368 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 02:41:31,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72935 states. [2021-11-23 02:41:32,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72935 to 72933. [2021-11-23 02:41:32,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72933 states, 72932 states have (on average 1.2318598146218396) internal successors, (89842), 72932 states have internal predecessors, (89842), 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) [2021-11-23 02:41:32,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72933 states to 72933 states and 89842 transitions. [2021-11-23 02:41:32,589 INFO L78 Accepts]: Start accepts. Automaton has 72933 states and 89842 transitions. Word has length 257 [2021-11-23 02:41:32,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:41:32,590 INFO L470 AbstractCegarLoop]: Abstraction has 72933 states and 89842 transitions. [2021-11-23 02:41:32,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 2 states have internal predecessors, (242), 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) [2021-11-23 02:41:32,590 INFO L276 IsEmpty]: Start isEmpty. Operand 72933 states and 89842 transitions. [2021-11-23 02:41:32,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2021-11-23 02:41:32,612 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:41:32,613 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:41:32,639 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c8fc-fe5c-4a90-9515-1e69d4310de2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-23 02:41:32,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c8fc-fe5c-4a90-9515-1e69d4310de2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-23 02:41:32,827 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:41:32,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:41:32,828 INFO L85 PathProgramCache]: Analyzing trace with hash 310053608, now seen corresponding path program 1 times [2021-11-23 02:41:32,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:41:32,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702320314] [2021-11-23 02:41:32,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:41:32,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:41:32,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:41:32,934 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:41:32,934 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:41:32,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702320314] [2021-11-23 02:41:32,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702320314] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:41:32,935 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:41:32,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:41:32,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114347951] [2021-11-23 02:41:32,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:41:32,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:41:32,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:41:32,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:41:32,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:41:32,937 INFO L87 Difference]: Start difference. First operand 72933 states and 89842 transitions. Second operand has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 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) [2021-11-23 02:41:34,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:41:34,221 INFO L93 Difference]: Finished difference Result 148439 states and 183665 transitions. [2021-11-23 02:41:34,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:41:34,222 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 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 258 [2021-11-23 02:41:34,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:41:34,318 INFO L225 Difference]: With dead ends: 148439 [2021-11-23 02:41:34,318 INFO L226 Difference]: Without dead ends: 78796 [2021-11-23 02:41:34,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:41:34,349 INFO L933 BasicCegarLoop]: 216 mSDtfsCounter, 160 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:41:34,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 219 Invalid, 542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-23 02:41:34,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78796 states. [2021-11-23 02:41:35,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78796 to 76365. [2021-11-23 02:41:35,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76365 states, 76364 states have (on average 1.192787177203918) internal successors, (91086), 76364 states have internal predecessors, (91086), 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) [2021-11-23 02:41:35,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76365 states to 76365 states and 91086 transitions. [2021-11-23 02:41:35,577 INFO L78 Accepts]: Start accepts. Automaton has 76365 states and 91086 transitions. Word has length 258 [2021-11-23 02:41:35,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:41:35,578 INFO L470 AbstractCegarLoop]: Abstraction has 76365 states and 91086 transitions. [2021-11-23 02:41:35,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 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) [2021-11-23 02:41:35,578 INFO L276 IsEmpty]: Start isEmpty. Operand 76365 states and 91086 transitions. [2021-11-23 02:41:35,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2021-11-23 02:41:35,620 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:41:35,620 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:41:35,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-23 02:41:35,621 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:41:35,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:41:35,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1483970597, now seen corresponding path program 1 times [2021-11-23 02:41:35,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:41:35,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627192293] [2021-11-23 02:41:35,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:41:35,622 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:41:35,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:41:35,774 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 117 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-23 02:41:35,774 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:41:35,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627192293] [2021-11-23 02:41:35,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627192293] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:41:35,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349123384] [2021-11-23 02:41:35,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:41:35,775 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:41:35,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c8fc-fe5c-4a90-9515-1e69d4310de2/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:41:35,776 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c8fc-fe5c-4a90-9515-1e69d4310de2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:41:35,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c8fc-fe5c-4a90-9515-1e69d4310de2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 02:41:35,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:41:35,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 02:41:35,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:41:36,736 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-23 02:41:36,736 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:41:36,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349123384] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:41:36,737 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:41:36,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-23 02:41:36,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619700861] [2021-11-23 02:41:36,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:41:36,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:41:36,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:41:36,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:41:36,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:41:36,740 INFO L87 Difference]: Start difference. First operand 76365 states and 91086 transitions. Second operand has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 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) [2021-11-23 02:41:37,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:41:37,632 INFO L93 Difference]: Finished difference Result 155160 states and 186530 transitions. [2021-11-23 02:41:37,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:41:37,633 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 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 258 [2021-11-23 02:41:37,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:41:37,719 INFO L225 Difference]: With dead ends: 155160 [2021-11-23 02:41:37,719 INFO L226 Difference]: Without dead ends: 82085 [2021-11-23 02:41:37,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:41:37,755 INFO L933 BasicCegarLoop]: 187 mSDtfsCounter, 39 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:41:37,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 191 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 02:41:37,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82085 states. [2021-11-23 02:41:39,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82085 to 81513. [2021-11-23 02:41:39,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81513 states, 81512 states have (on average 1.1958975365590343) internal successors, (97480), 81512 states have internal predecessors, (97480), 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) [2021-11-23 02:41:39,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81513 states to 81513 states and 97480 transitions. [2021-11-23 02:41:39,240 INFO L78 Accepts]: Start accepts. Automaton has 81513 states and 97480 transitions. Word has length 258 [2021-11-23 02:41:39,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:41:39,240 INFO L470 AbstractCegarLoop]: Abstraction has 81513 states and 97480 transitions. [2021-11-23 02:41:39,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 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) [2021-11-23 02:41:39,241 INFO L276 IsEmpty]: Start isEmpty. Operand 81513 states and 97480 transitions. [2021-11-23 02:41:39,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2021-11-23 02:41:39,286 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:41:39,286 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:41:39,310 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c8fc-fe5c-4a90-9515-1e69d4310de2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 02:41:39,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c8fc-fe5c-4a90-9515-1e69d4310de2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:41:39,487 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:41:39,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:41:39,487 INFO L85 PathProgramCache]: Analyzing trace with hash 948001744, now seen corresponding path program 1 times [2021-11-23 02:41:39,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:41:39,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088128460] [2021-11-23 02:41:39,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:41:39,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:41:39,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:41:39,628 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 143 proven. 3 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-23 02:41:39,628 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:41:39,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088128460] [2021-11-23 02:41:39,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088128460] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:41:39,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224254383] [2021-11-23 02:41:39,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:41:39,629 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:41:39,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c8fc-fe5c-4a90-9515-1e69d4310de2/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:41:39,630 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c8fc-fe5c-4a90-9515-1e69d4310de2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:41:39,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c8fc-fe5c-4a90-9515-1e69d4310de2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 02:41:39,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:41:39,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 02:41:39,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:41:40,191 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 137 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-23 02:41:40,192 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:41:40,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224254383] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:41:40,192 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:41:40,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-23 02:41:40,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405959369] [2021-11-23 02:41:40,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:41:40,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:41:40,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:41:40,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:41:40,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:41:40,198 INFO L87 Difference]: Start difference. First operand 81513 states and 97480 transitions. Second operand has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 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) [2021-11-23 02:41:41,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:41:41,715 INFO L93 Difference]: Finished difference Result 170890 states and 205392 transitions. [2021-11-23 02:41:41,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:41:41,716 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 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 281 [2021-11-23 02:41:41,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:41:41,822 INFO L225 Difference]: With dead ends: 170890 [2021-11-23 02:41:41,822 INFO L226 Difference]: Without dead ends: 89664 [2021-11-23 02:41:41,849 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:41:41,850 INFO L933 BasicCegarLoop]: 241 mSDtfsCounter, 9 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:41:41,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 245 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-23 02:41:41,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89664 states. [2021-11-23 02:41:43,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89664 to 89664. [2021-11-23 02:41:43,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89664 states, 89663 states have (on average 1.1942384261066437) internal successors, (107079), 89663 states have internal predecessors, (107079), 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) [2021-11-23 02:41:43,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89664 states to 89664 states and 107079 transitions. [2021-11-23 02:41:43,193 INFO L78 Accepts]: Start accepts. Automaton has 89664 states and 107079 transitions. Word has length 281 [2021-11-23 02:41:43,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:41:43,194 INFO L470 AbstractCegarLoop]: Abstraction has 89664 states and 107079 transitions. [2021-11-23 02:41:43,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 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) [2021-11-23 02:41:43,195 INFO L276 IsEmpty]: Start isEmpty. Operand 89664 states and 107079 transitions. [2021-11-23 02:41:43,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2021-11-23 02:41:43,233 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:41:43,233 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:41:43,257 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c8fc-fe5c-4a90-9515-1e69d4310de2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 02:41:43,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c8fc-fe5c-4a90-9515-1e69d4310de2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:41:43,434 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:41:43,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:41:43,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1636185992, now seen corresponding path program 1 times [2021-11-23 02:41:43,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:41:43,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548396656] [2021-11-23 02:41:43,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:41:43,435 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:41:43,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:41:43,594 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 159 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:41:43,594 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:41:43,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548396656] [2021-11-23 02:41:43,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548396656] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:41:43,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965751170] [2021-11-23 02:41:43,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:41:43,595 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:41:43,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c8fc-fe5c-4a90-9515-1e69d4310de2/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:41:43,599 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c8fc-fe5c-4a90-9515-1e69d4310de2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:41:43,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1304c8fc-fe5c-4a90-9515-1e69d4310de2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 02:41:43,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:41:43,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:41:43,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:41:44,611 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 159 proven. 38 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 02:41:44,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:41:45,112 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 159 proven. 38 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 02:41:45,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965751170] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:41:45,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1777391681] [2021-11-23 02:41:45,146 INFO L159 IcfgInterpreter]: Started Sifa with 145 locations of interest [2021-11-23 02:41:45,147 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:41:45,152 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:41:45,158 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:41:45,158 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs