./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6569e9c8-b2b6-43b6-8217-56ca25950e3d/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6569e9c8-b2b6-43b6-8217-56ca25950e3d/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6569e9c8-b2b6-43b6-8217-56ca25950e3d/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6569e9c8-b2b6-43b6-8217-56ca25950e3d/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6569e9c8-b2b6-43b6-8217-56ca25950e3d/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6569e9c8-b2b6-43b6-8217-56ca25950e3d/bin/utaipan-TEXQjIfE4P --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b8f220cadba131cee309fef082c623cdd627c534b9e708cc4a4f1dd2aa7336b9 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 22:48:02,183 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 22:48:02,186 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 22:48:02,245 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 22:48:02,246 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 22:48:02,250 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 22:48:02,252 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 22:48:02,256 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 22:48:02,259 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 22:48:02,266 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 22:48:02,267 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 22:48:02,269 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 22:48:02,270 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 22:48:02,272 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 22:48:02,276 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 22:48:02,281 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 22:48:02,283 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 22:48:02,284 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 22:48:02,286 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 22:48:02,296 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 22:48:02,298 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 22:48:02,299 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 22:48:02,302 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 22:48:02,303 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 22:48:02,307 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 22:48:02,308 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 22:48:02,308 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 22:48:02,310 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 22:48:02,311 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 22:48:02,312 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 22:48:02,313 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 22:48:02,314 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 22:48:02,316 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 22:48:02,317 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 22:48:02,319 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 22:48:02,319 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 22:48:02,320 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 22:48:02,320 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 22:48:02,321 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 22:48:02,322 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 22:48:02,322 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 22:48:02,323 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6569e9c8-b2b6-43b6-8217-56ca25950e3d/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-20 22:48:02,370 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 22:48:02,370 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 22:48:02,371 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 22:48:02,371 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 22:48:02,372 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 22:48:02,372 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 22:48:02,373 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 22:48:02,373 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 22:48:02,373 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 22:48:02,373 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-20 22:48:02,374 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 22:48:02,375 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 22:48:02,375 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-20 22:48:02,375 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-20 22:48:02,375 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 22:48:02,376 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-20 22:48:02,376 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-20 22:48:02,376 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-20 22:48:02,377 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 22:48:02,377 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 22:48:02,377 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 22:48:02,377 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 22:48:02,378 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 22:48:02,378 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 22:48:02,378 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 22:48:02,378 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 22:48:02,380 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 22:48:02,380 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 22:48:02,381 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 22:48:02,381 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 22:48:02,381 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 22:48:02,382 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 22:48:02,382 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 22:48:02,382 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 22:48:02,382 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 22:48:02,382 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 22:48:02,383 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-20 22:48:02,383 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 22:48:02,383 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 22:48:02,383 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 22:48:02,383 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 22:48:02,384 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_6569e9c8-b2b6-43b6-8217-56ca25950e3d/bin/utaipan-TEXQjIfE4P/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6569e9c8-b2b6-43b6-8217-56ca25950e3d/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b8f220cadba131cee309fef082c623cdd627c534b9e708cc4a4f1dd2aa7336b9 [2021-11-20 22:48:02,681 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 22:48:02,705 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 22:48:02,707 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 22:48:02,708 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 22:48:02,709 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 22:48:02,710 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6569e9c8-b2b6-43b6-8217-56ca25950e3d/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2021-11-20 22:48:02,779 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6569e9c8-b2b6-43b6-8217-56ca25950e3d/bin/utaipan-TEXQjIfE4P/data/0acd04bd4/7bf027767d584023a053f93f01df0e23/FLAG199197609 [2021-11-20 22:48:03,290 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 22:48:03,291 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6569e9c8-b2b6-43b6-8217-56ca25950e3d/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2021-11-20 22:48:03,316 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6569e9c8-b2b6-43b6-8217-56ca25950e3d/bin/utaipan-TEXQjIfE4P/data/0acd04bd4/7bf027767d584023a053f93f01df0e23/FLAG199197609 [2021-11-20 22:48:03,621 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6569e9c8-b2b6-43b6-8217-56ca25950e3d/bin/utaipan-TEXQjIfE4P/data/0acd04bd4/7bf027767d584023a053f93f01df0e23 [2021-11-20 22:48:03,628 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 22:48:03,630 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 22:48:03,634 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 22:48:03,634 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 22:48:03,637 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 22:48:03,638 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:48:03" (1/1) ... [2021-11-20 22:48:03,639 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f36760a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:48:03, skipping insertion in model container [2021-11-20 22:48:03,639 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:48:03" (1/1) ... [2021-11-20 22:48:03,646 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 22:48:03,710 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 22:48:04,003 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_6569e9c8-b2b6-43b6-8217-56ca25950e3d/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c[6322,6335] [2021-11-20 22:48:04,068 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 22:48:04,085 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 22:48:04,140 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_6569e9c8-b2b6-43b6-8217-56ca25950e3d/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c[6322,6335] [2021-11-20 22:48:04,162 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 22:48:04,178 INFO L208 MainTranslator]: Completed translation [2021-11-20 22:48:04,178 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:48:04 WrapperNode [2021-11-20 22:48:04,179 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 22:48:04,180 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 22:48:04,180 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 22:48:04,180 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 22:48:04,188 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:48:04" (1/1) ... [2021-11-20 22:48:04,199 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:48:04" (1/1) ... [2021-11-20 22:48:04,235 INFO L137 Inliner]: procedures = 24, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 511 [2021-11-20 22:48:04,235 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 22:48:04,236 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 22:48:04,236 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 22:48:04,237 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 22:48:04,245 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:48:04" (1/1) ... [2021-11-20 22:48:04,245 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:48:04" (1/1) ... [2021-11-20 22:48:04,257 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:48:04" (1/1) ... [2021-11-20 22:48:04,257 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:48:04" (1/1) ... [2021-11-20 22:48:04,270 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:48:04" (1/1) ... [2021-11-20 22:48:04,286 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:48:04" (1/1) ... [2021-11-20 22:48:04,288 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:48:04" (1/1) ... [2021-11-20 22:48:04,292 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 22:48:04,293 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 22:48:04,293 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 22:48:04,293 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 22:48:04,294 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:48:04" (1/1) ... [2021-11-20 22:48:04,328 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 22:48:04,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6569e9c8-b2b6-43b6-8217-56ca25950e3d/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:48:04,348 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6569e9c8-b2b6-43b6-8217-56ca25950e3d/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 22:48:04,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6569e9c8-b2b6-43b6-8217-56ca25950e3d/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 22:48:04,383 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 22:48:04,383 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 22:48:04,384 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 22:48:04,384 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 22:48:04,485 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 22:48:04,487 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 22:48:04,934 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 22:48:05,121 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 22:48:05,121 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-20 22:48:05,125 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:48:05 BoogieIcfgContainer [2021-11-20 22:48:05,125 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 22:48:05,127 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 22:48:05,128 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 22:48:05,131 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 22:48:05,131 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 10:48:03" (1/3) ... [2021-11-20 22:48:05,132 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62c86bd2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:48:05, skipping insertion in model container [2021-11-20 22:48:05,132 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:48:04" (2/3) ... [2021-11-20 22:48:05,133 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62c86bd2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:48:05, skipping insertion in model container [2021-11-20 22:48:05,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:48:05" (3/3) ... [2021-11-20 22:48:05,135 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2021-11-20 22:48:05,141 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 22:48:05,141 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 22:48:05,206 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 22:48:05,218 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 [2021-11-20 22:48:05,218 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 22:48:05,239 INFO L276 IsEmpty]: Start isEmpty. Operand has 100 states, 98 states have (on average 1.6938775510204083) internal successors, (166), 99 states have internal predecessors, (166), 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) [2021-11-20 22:48:05,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-20 22:48:05,249 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:48:05,250 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] [2021-11-20 22:48:05,250 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:48:05,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:48:05,256 INFO L85 PathProgramCache]: Analyzing trace with hash 2042267080, now seen corresponding path program 1 times [2021-11-20 22:48:05,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:48:05,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868444518] [2021-11-20 22:48:05,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:48:05,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:48:05,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:48:05,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:48:05,660 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:48:05,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868444518] [2021-11-20 22:48:05,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868444518] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:48:05,661 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:48:05,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 22:48:05,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046375030] [2021-11-20 22:48:05,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:48:05,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 22:48:05,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:48:05,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 22:48:05,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 22:48:05,694 INFO L87 Difference]: Start difference. First operand has 100 states, 98 states have (on average 1.6938775510204083) internal successors, (166), 99 states have internal predecessors, (166), 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 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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) [2021-11-20 22:48:05,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:48:05,843 INFO L93 Difference]: Finished difference Result 226 states and 355 transitions. [2021-11-20 22:48:05,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 22:48:05,846 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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 47 [2021-11-20 22:48:05,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:48:05,855 INFO L225 Difference]: With dead ends: 226 [2021-11-20 22:48:05,855 INFO L226 Difference]: Without dead ends: 156 [2021-11-20 22:48:05,858 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 [2021-11-20 22:48:05,862 INFO L933 BasicCegarLoop]: 235 mSDtfsCounter, 122 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 22:48:05,863 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 326 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 22:48:05,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-11-20 22:48:05,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 154. [2021-11-20 22:48:05,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 1.4052287581699345) internal successors, (215), 153 states have internal predecessors, (215), 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) [2021-11-20 22:48:05,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 215 transitions. [2021-11-20 22:48:05,911 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 215 transitions. Word has length 47 [2021-11-20 22:48:05,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:48:05,912 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 215 transitions. [2021-11-20 22:48:05,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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) [2021-11-20 22:48:05,912 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 215 transitions. [2021-11-20 22:48:05,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-20 22:48:05,914 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:48:05,915 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] [2021-11-20 22:48:05,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 22:48:05,915 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:48:05,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:48:05,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1745493334, now seen corresponding path program 1 times [2021-11-20 22:48:05,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:48:05,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33230022] [2021-11-20 22:48:05,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:48:05,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:48:05,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:48:06,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:48:06,065 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:48:06,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33230022] [2021-11-20 22:48:06,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33230022] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:48:06,065 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:48:06,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 22:48:06,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222352768] [2021-11-20 22:48:06,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:48:06,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 22:48:06,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:48:06,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 22:48:06,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 22:48:06,069 INFO L87 Difference]: Start difference. First operand 154 states and 215 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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) [2021-11-20 22:48:06,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:48:06,159 INFO L93 Difference]: Finished difference Result 372 states and 543 transitions. [2021-11-20 22:48:06,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 22:48:06,160 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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 49 [2021-11-20 22:48:06,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:48:06,163 INFO L225 Difference]: With dead ends: 372 [2021-11-20 22:48:06,166 INFO L226 Difference]: Without dead ends: 252 [2021-11-20 22:48:06,167 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 [2021-11-20 22:48:06,169 INFO L933 BasicCegarLoop]: 182 mSDtfsCounter, 89 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 22:48:06,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 263 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 22:48:06,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-11-20 22:48:06,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 250. [2021-11-20 22:48:06,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 1.4417670682730923) internal successors, (359), 249 states have internal predecessors, (359), 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) [2021-11-20 22:48:06,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 359 transitions. [2021-11-20 22:48:06,216 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 359 transitions. Word has length 49 [2021-11-20 22:48:06,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:48:06,224 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 359 transitions. [2021-11-20 22:48:06,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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) [2021-11-20 22:48:06,224 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 359 transitions. [2021-11-20 22:48:06,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-20 22:48:06,226 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:48:06,227 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] [2021-11-20 22:48:06,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 22:48:06,227 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:48:06,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:48:06,228 INFO L85 PathProgramCache]: Analyzing trace with hash -658522970, now seen corresponding path program 1 times [2021-11-20 22:48:06,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:48:06,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614822525] [2021-11-20 22:48:06,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:48:06,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:48:06,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:48:06,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:48:06,351 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:48:06,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614822525] [2021-11-20 22:48:06,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614822525] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:48:06,353 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:48:06,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 22:48:06,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295987178] [2021-11-20 22:48:06,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:48:06,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 22:48:06,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:48:06,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 22:48:06,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 22:48:06,355 INFO L87 Difference]: Start difference. First operand 250 states and 359 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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) [2021-11-20 22:48:06,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:48:06,430 INFO L93 Difference]: Finished difference Result 638 states and 941 transitions. [2021-11-20 22:48:06,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 22:48:06,430 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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 52 [2021-11-20 22:48:06,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:48:06,436 INFO L225 Difference]: With dead ends: 638 [2021-11-20 22:48:06,436 INFO L226 Difference]: Without dead ends: 422 [2021-11-20 22:48:06,438 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 [2021-11-20 22:48:06,439 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 84 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 22:48:06,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 248 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 22:48:06,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2021-11-20 22:48:06,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 420. [2021-11-20 22:48:06,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 419 states have (on average 1.458233890214797) internal successors, (611), 419 states have internal predecessors, (611), 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) [2021-11-20 22:48:06,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 611 transitions. [2021-11-20 22:48:06,528 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 611 transitions. Word has length 52 [2021-11-20 22:48:06,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:48:06,528 INFO L470 AbstractCegarLoop]: Abstraction has 420 states and 611 transitions. [2021-11-20 22:48:06,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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) [2021-11-20 22:48:06,529 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 611 transitions. [2021-11-20 22:48:06,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-20 22:48:06,535 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:48:06,536 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] [2021-11-20 22:48:06,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 22:48:06,536 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:48:06,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:48:06,537 INFO L85 PathProgramCache]: Analyzing trace with hash -133348299, now seen corresponding path program 1 times [2021-11-20 22:48:06,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:48:06,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786885975] [2021-11-20 22:48:06,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:48:06,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:48:06,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:48:06,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:48:06,622 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:48:06,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786885975] [2021-11-20 22:48:06,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786885975] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:48:06,622 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:48:06,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 22:48:06,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799566757] [2021-11-20 22:48:06,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:48:06,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 22:48:06,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:48:06,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 22:48:06,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 22:48:06,625 INFO L87 Difference]: Start difference. First operand 420 states and 611 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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) [2021-11-20 22:48:06,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:48:06,743 INFO L93 Difference]: Finished difference Result 1104 states and 1629 transitions. [2021-11-20 22:48:06,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 22:48:06,744 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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 55 [2021-11-20 22:48:06,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:48:06,749 INFO L225 Difference]: With dead ends: 1104 [2021-11-20 22:48:06,750 INFO L226 Difference]: Without dead ends: 718 [2021-11-20 22:48:06,756 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 [2021-11-20 22:48:06,765 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 79 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 22:48:06,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 233 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 22:48:06,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2021-11-20 22:48:06,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 716. [2021-11-20 22:48:06,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 1.4587412587412587) internal successors, (1043), 715 states have internal predecessors, (1043), 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) [2021-11-20 22:48:06,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 1043 transitions. [2021-11-20 22:48:06,835 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 1043 transitions. Word has length 55 [2021-11-20 22:48:06,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:48:06,836 INFO L470 AbstractCegarLoop]: Abstraction has 716 states and 1043 transitions. [2021-11-20 22:48:06,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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) [2021-11-20 22:48:06,836 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 1043 transitions. [2021-11-20 22:48:06,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-20 22:48:06,838 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:48:06,838 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] [2021-11-20 22:48:06,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 22:48:06,839 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:48:06,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:48:06,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1603516835, now seen corresponding path program 1 times [2021-11-20 22:48:06,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:48:06,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995795955] [2021-11-20 22:48:06,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:48:06,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:48:06,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:48:06,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:48:06,897 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:48:06,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995795955] [2021-11-20 22:48:06,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995795955] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:48:06,898 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:48:06,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 22:48:06,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781974263] [2021-11-20 22:48:06,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:48:06,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 22:48:06,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:48:06,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 22:48:06,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 22:48:06,900 INFO L87 Difference]: Start difference. First operand 716 states and 1043 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:48:07,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:48:07,032 INFO L93 Difference]: Finished difference Result 1904 states and 2789 transitions. [2021-11-20 22:48:07,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 22:48:07,033 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-20 22:48:07,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:48:07,042 INFO L225 Difference]: With dead ends: 1904 [2021-11-20 22:48:07,043 INFO L226 Difference]: Without dead ends: 1222 [2021-11-20 22:48:07,044 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 [2021-11-20 22:48:07,050 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 74 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 22:48:07,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 218 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 22:48:07,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1222 states. [2021-11-20 22:48:07,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1222 to 1220. [2021-11-20 22:48:07,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1220 states, 1219 states have (on average 1.446267432321575) internal successors, (1763), 1219 states have internal predecessors, (1763), 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) [2021-11-20 22:48:07,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1220 states to 1220 states and 1763 transitions. [2021-11-20 22:48:07,156 INFO L78 Accepts]: Start accepts. Automaton has 1220 states and 1763 transitions. Word has length 58 [2021-11-20 22:48:07,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:48:07,157 INFO L470 AbstractCegarLoop]: Abstraction has 1220 states and 1763 transitions. [2021-11-20 22:48:07,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:48:07,158 INFO L276 IsEmpty]: Start isEmpty. Operand 1220 states and 1763 transitions. [2021-11-20 22:48:07,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-20 22:48:07,169 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:48:07,169 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] [2021-11-20 22:48:07,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 22:48:07,169 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:48:07,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:48:07,170 INFO L85 PathProgramCache]: Analyzing trace with hash -979839018, now seen corresponding path program 1 times [2021-11-20 22:48:07,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:48:07,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697343728] [2021-11-20 22:48:07,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:48:07,171 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:48:07,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:48:07,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:48:07,339 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:48:07,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697343728] [2021-11-20 22:48:07,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697343728] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:48:07,340 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:48:07,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 22:48:07,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750891159] [2021-11-20 22:48:07,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:48:07,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 22:48:07,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:48:07,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 22:48:07,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-20 22:48:07,342 INFO L87 Difference]: Start difference. First operand 1220 states and 1763 transitions. Second operand has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 7 states have internal predecessors, (61), 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) [2021-11-20 22:48:07,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:48:07,971 INFO L93 Difference]: Finished difference Result 6190 states and 8936 transitions. [2021-11-20 22:48:07,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 22:48:07,971 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 7 states have internal predecessors, (61), 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 61 [2021-11-20 22:48:07,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:48:08,003 INFO L225 Difference]: With dead ends: 6190 [2021-11-20 22:48:08,004 INFO L226 Difference]: Without dead ends: 5004 [2021-11-20 22:48:08,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-20 22:48:08,009 INFO L933 BasicCegarLoop]: 271 mSDtfsCounter, 404 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 404 SdHoareTripleChecker+Valid, 661 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 22:48:08,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [404 Valid, 661 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 22:48:08,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5004 states. [2021-11-20 22:48:08,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5004 to 4996. [2021-11-20 22:48:08,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4996 states, 4995 states have (on average 1.438838838838839) internal successors, (7187), 4995 states have internal predecessors, (7187), 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) [2021-11-20 22:48:08,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4996 states to 4996 states and 7187 transitions. [2021-11-20 22:48:08,528 INFO L78 Accepts]: Start accepts. Automaton has 4996 states and 7187 transitions. Word has length 61 [2021-11-20 22:48:08,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:48:08,530 INFO L470 AbstractCegarLoop]: Abstraction has 4996 states and 7187 transitions. [2021-11-20 22:48:08,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 7 states have internal predecessors, (61), 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) [2021-11-20 22:48:08,530 INFO L276 IsEmpty]: Start isEmpty. Operand 4996 states and 7187 transitions. [2021-11-20 22:48:08,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-20 22:48:08,533 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:48:08,533 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] [2021-11-20 22:48:08,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 22:48:08,534 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:48:08,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:48:08,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1170570751, now seen corresponding path program 1 times [2021-11-20 22:48:08,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:48:08,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383830968] [2021-11-20 22:48:08,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:48:08,535 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:48:08,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:48:08,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:48:08,693 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:48:08,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383830968] [2021-11-20 22:48:08,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383830968] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:48:08,694 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:48:08,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 22:48:08,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580440909] [2021-11-20 22:48:08,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:48:08,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 22:48:08,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:48:08,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 22:48:08,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:48:08,699 INFO L87 Difference]: Start difference. First operand 4996 states and 7187 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 4 states have internal predecessors, (63), 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) [2021-11-20 22:48:09,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:48:09,627 INFO L93 Difference]: Finished difference Result 12821 states and 18541 transitions. [2021-11-20 22:48:09,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 22:48:09,628 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 4 states have internal predecessors, (63), 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 63 [2021-11-20 22:48:09,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:48:09,675 INFO L225 Difference]: With dead ends: 12821 [2021-11-20 22:48:09,676 INFO L226 Difference]: Without dead ends: 7859 [2021-11-20 22:48:09,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-20 22:48:09,685 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 510 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 510 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 22:48:09,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [510 Valid, 135 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 22:48:09,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7859 states. [2021-11-20 22:48:10,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7859 to 7857. [2021-11-20 22:48:10,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7857 states, 7856 states have (on average 1.433172097759674) internal successors, (11259), 7856 states have internal predecessors, (11259), 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) [2021-11-20 22:48:10,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7857 states to 7857 states and 11259 transitions. [2021-11-20 22:48:10,501 INFO L78 Accepts]: Start accepts. Automaton has 7857 states and 11259 transitions. Word has length 63 [2021-11-20 22:48:10,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:48:10,502 INFO L470 AbstractCegarLoop]: Abstraction has 7857 states and 11259 transitions. [2021-11-20 22:48:10,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 4 states have internal predecessors, (63), 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) [2021-11-20 22:48:10,502 INFO L276 IsEmpty]: Start isEmpty. Operand 7857 states and 11259 transitions. [2021-11-20 22:48:10,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-20 22:48:10,503 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:48:10,503 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] [2021-11-20 22:48:10,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-20 22:48:10,504 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:48:10,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:48:10,506 INFO L85 PathProgramCache]: Analyzing trace with hash 204691428, now seen corresponding path program 1 times [2021-11-20 22:48:10,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:48:10,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460377910] [2021-11-20 22:48:10,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:48:10,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:48:10,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:48:10,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:48:10,739 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:48:10,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460377910] [2021-11-20 22:48:10,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460377910] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:48:10,740 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:48:10,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-20 22:48:10,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150763762] [2021-11-20 22:48:10,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:48:10,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 22:48:10,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:48:10,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 22:48:10,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-20 22:48:10,742 INFO L87 Difference]: Start difference. First operand 7857 states and 11259 transitions. Second operand has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 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) [2021-11-20 22:48:12,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:48:12,752 INFO L93 Difference]: Finished difference Result 16751 states and 24209 transitions. [2021-11-20 22:48:12,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 22:48:12,753 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 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 63 [2021-11-20 22:48:12,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:48:12,849 INFO L225 Difference]: With dead ends: 16751 [2021-11-20 22:48:12,852 INFO L226 Difference]: Without dead ends: 16749 [2021-11-20 22:48:12,857 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2021-11-20 22:48:12,858 INFO L933 BasicCegarLoop]: 404 mSDtfsCounter, 1335 mSDsluCounter, 1348 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1335 SdHoareTripleChecker+Valid, 1727 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 22:48:12,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1335 Valid, 1727 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 22:48:12,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16749 states. [2021-11-20 22:48:13,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16749 to 8209. [2021-11-20 22:48:13,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8209 states, 8208 states have (on average 1.433845029239766) internal successors, (11769), 8208 states have internal predecessors, (11769), 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) [2021-11-20 22:48:13,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8209 states to 8209 states and 11769 transitions. [2021-11-20 22:48:13,993 INFO L78 Accepts]: Start accepts. Automaton has 8209 states and 11769 transitions. Word has length 63 [2021-11-20 22:48:13,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:48:13,995 INFO L470 AbstractCegarLoop]: Abstraction has 8209 states and 11769 transitions. [2021-11-20 22:48:13,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 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) [2021-11-20 22:48:13,996 INFO L276 IsEmpty]: Start isEmpty. Operand 8209 states and 11769 transitions. [2021-11-20 22:48:13,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-20 22:48:13,998 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:48:13,999 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:48:13,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-20 22:48:13,999 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:48:13,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:48:14,000 INFO L85 PathProgramCache]: Analyzing trace with hash -653850294, now seen corresponding path program 1 times [2021-11-20 22:48:14,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:48:14,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357100640] [2021-11-20 22:48:14,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:48:14,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:48:14,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:48:15,138 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:48:15,138 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:48:15,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357100640] [2021-11-20 22:48:15,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357100640] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 22:48:15,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853951475] [2021-11-20 22:48:15,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:48:15,139 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:48:15,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6569e9c8-b2b6-43b6-8217-56ca25950e3d/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:48:15,141 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6569e9c8-b2b6-43b6-8217-56ca25950e3d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:48:15,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6569e9c8-b2b6-43b6-8217-56ca25950e3d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 22:48:15,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:48:15,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 70 conjunts are in the unsatisfiable core [2021-11-20 22:48:15,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:48:18,502 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:48:18,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:48:39,301 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:48:39,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853951475] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:48:39,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1129504346] [2021-11-20 22:48:39,328 INFO L159 IcfgInterpreter]: Started Sifa with 64 locations of interest [2021-11-20 22:48:39,328 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 22:48:39,333 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 22:48:39,339 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 22:48:39,340 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 22:48:39,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:48:39,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:48:39,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:48:39,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:48:39,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 26 [2021-11-20 22:48:39,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:39,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:39,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:39,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:39,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:39,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:39,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:39,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:39,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:39,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:39,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 20 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 26 [2021-11-20 22:52:42,309 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 22:53:20,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1129504346] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:53:20,828 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-20 22:53:20,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [20, 19, 19] total 114 [2021-11-20 22:53:20,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714671317] [2021-11-20 22:53:20,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:53:20,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-11-20 22:53:20,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:53:20,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-11-20 22:53:20,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1820, Invalid=11062, Unknown=0, NotChecked=0, Total=12882 [2021-11-20 22:53:20,836 INFO L87 Difference]: Start difference. First operand 8209 states and 11769 transitions. Second operand has 62 states, 62 states have (on average 1.1129032258064515) internal successors, (69), 61 states have internal predecessors, (69), 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) [2021-11-20 22:57:18,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:57:18,184 INFO L93 Difference]: Finished difference Result 18221 states and 26308 transitions. [2021-11-20 22:57:18,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 181 states. [2021-11-20 22:57:18,184 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.1129032258064515) internal successors, (69), 61 states have internal predecessors, (69), 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 75 [2021-11-20 22:57:18,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:57:18,209 INFO L225 Difference]: With dead ends: 18221 [2021-11-20 22:57:18,210 INFO L226 Difference]: Without dead ends: 9998 [2021-11-20 22:57:18,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 131 SyntacticMatches, 23 SemanticMatches, 247 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24166 ImplicationChecksByTransitivity, 265.6s TimeCoverageRelationStatistics Valid=6439, Invalid=55313, Unknown=0, NotChecked=0, Total=61752 [2021-11-20 22:57:18,245 INFO L933 BasicCegarLoop]: 155 mSDtfsCounter, 1567 mSDsluCounter, 995 mSDsCounter, 0 mSdLazyCounter, 5599 mSolverCounterSat, 414 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1567 SdHoareTripleChecker+Valid, 1150 SdHoareTripleChecker+Invalid, 6013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 414 IncrementalHoareTripleChecker+Valid, 5599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.2s IncrementalHoareTripleChecker+Time [2021-11-20 22:57:18,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1567 Valid, 1150 Invalid, 6013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [414 Valid, 5599 Invalid, 0 Unknown, 0 Unchecked, 12.2s Time] [2021-11-20 22:57:18,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9998 states. [2021-11-20 22:57:19,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9998 to 9380. [2021-11-20 22:57:19,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9380 states, 9379 states have (on average 1.4129438106407932) internal successors, (13252), 9379 states have internal predecessors, (13252), 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) [2021-11-20 22:57:19,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9380 states to 9380 states and 13252 transitions. [2021-11-20 22:57:19,405 INFO L78 Accepts]: Start accepts. Automaton has 9380 states and 13252 transitions. Word has length 75 [2021-11-20 22:57:19,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:57:19,405 INFO L470 AbstractCegarLoop]: Abstraction has 9380 states and 13252 transitions. [2021-11-20 22:57:19,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.1129032258064515) internal successors, (69), 61 states have internal predecessors, (69), 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) [2021-11-20 22:57:19,406 INFO L276 IsEmpty]: Start isEmpty. Operand 9380 states and 13252 transitions. [2021-11-20 22:57:19,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-20 22:57:19,409 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:57:19,409 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:57:19,441 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6569e9c8-b2b6-43b6-8217-56ca25950e3d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 22:57:19,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6569e9c8-b2b6-43b6-8217-56ca25950e3d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-20 22:57:19,632 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:57:19,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:57:19,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1880965587, now seen corresponding path program 1 times [2021-11-20 22:57:19,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:57:19,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368705675] [2021-11-20 22:57:19,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:57:19,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:57:19,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:57:19,690 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 22:57:19,690 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:57:19,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368705675] [2021-11-20 22:57:19,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368705675] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:57:19,690 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:57:19,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 22:57:19,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180521063] [2021-11-20 22:57:19,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:57:19,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 22:57:19,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:57:19,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 22:57:19,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:57:19,692 INFO L87 Difference]: Start difference. First operand 9380 states and 13252 transitions. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 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) [2021-11-20 22:57:21,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:57:21,037 INFO L93 Difference]: Finished difference Result 21965 states and 31444 transitions. [2021-11-20 22:57:21,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 22:57:21,037 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 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 75 [2021-11-20 22:57:21,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:57:21,070 INFO L225 Difference]: With dead ends: 21965 [2021-11-20 22:57:21,070 INFO L226 Difference]: Without dead ends: 13842 [2021-11-20 22:57:21,083 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-20 22:57:21,084 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 491 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 491 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 22:57:21,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [491 Valid, 145 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 22:57:21,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13842 states. [2021-11-20 22:57:22,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13842 to 13840. [2021-11-20 22:57:22,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13840 states, 13839 states have (on average 1.415058891538406) internal successors, (19583), 13839 states have internal predecessors, (19583), 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) [2021-11-20 22:57:22,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13840 states to 13840 states and 19583 transitions. [2021-11-20 22:57:22,527 INFO L78 Accepts]: Start accepts. Automaton has 13840 states and 19583 transitions. Word has length 75 [2021-11-20 22:57:22,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:57:22,527 INFO L470 AbstractCegarLoop]: Abstraction has 13840 states and 19583 transitions. [2021-11-20 22:57:22,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 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) [2021-11-20 22:57:22,528 INFO L276 IsEmpty]: Start isEmpty. Operand 13840 states and 19583 transitions. [2021-11-20 22:57:22,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-20 22:57:22,529 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:57:22,530 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:57:22,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-20 22:57:22,530 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:57:22,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:57:22,531 INFO L85 PathProgramCache]: Analyzing trace with hash -796496818, now seen corresponding path program 1 times [2021-11-20 22:57:22,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:57:22,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64499798] [2021-11-20 22:57:22,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:57:22,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:57:22,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:57:23,209 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:57:23,209 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:57:23,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64499798] [2021-11-20 22:57:23,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64499798] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 22:57:23,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105817406] [2021-11-20 22:57:23,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:57:23,210 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:57:23,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6569e9c8-b2b6-43b6-8217-56ca25950e3d/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:57:23,221 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6569e9c8-b2b6-43b6-8217-56ca25950e3d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:57:23,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6569e9c8-b2b6-43b6-8217-56ca25950e3d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 22:57:23,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:57:23,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 68 conjunts are in the unsatisfiable core [2021-11-20 22:57:23,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:57:25,477 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:57:25,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:57:44,723 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:57:44,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105817406] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:57:44,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1667532712] [2021-11-20 22:57:44,726 INFO L159 IcfgInterpreter]: Started Sifa with 64 locations of interest [2021-11-20 22:57:44,727 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 22:57:44,727 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 22:57:44,727 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 22:57:44,728 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 22:57:44,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:57:44,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:57:44,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:57:44,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:57:44,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 26 [2021-11-20 22:57:45,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:45,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:45,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:45,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:45,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:45,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:45,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:45,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:45,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:45,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:45,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 20 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 26