./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.1.ufo.BOUNDED-12.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_7e974af9-c637-4152-b1e6-c8a4e053e8b6/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e974af9-c637-4152-b1e6-c8a4e053e8b6/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_7e974af9-c637-4152-b1e6-c8a4e053e8b6/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e974af9-c637-4152-b1e6-c8a4e053e8b6/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.1.ufo.BOUNDED-12.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e974af9-c637-4152-b1e6-c8a4e053e8b6/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_7e974af9-c637-4152-b1e6-c8a4e053e8b6/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 d49205c4ffe20d5beac0ad3125002385f97f5ba1191dc9c85bce9eb1aba82790 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 00:38:55,070 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 00:38:55,072 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 00:38:55,146 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 00:38:55,147 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 00:38:55,152 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 00:38:55,154 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 00:38:55,158 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 00:38:55,161 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 00:38:55,167 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 00:38:55,168 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 00:38:55,170 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 00:38:55,170 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 00:38:55,173 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 00:38:55,175 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 00:38:55,180 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 00:38:55,182 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 00:38:55,183 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 00:38:55,186 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 00:38:55,194 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 00:38:55,196 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 00:38:55,198 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 00:38:55,201 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 00:38:55,202 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 00:38:55,211 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 00:38:55,211 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 00:38:55,212 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 00:38:55,214 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 00:38:55,215 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 00:38:55,216 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 00:38:55,217 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 00:38:55,218 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 00:38:55,221 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 00:38:55,222 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 00:38:55,223 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 00:38:55,224 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 00:38:55,225 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 00:38:55,225 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 00:38:55,225 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 00:38:55,226 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 00:38:55,227 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 00:38:55,228 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e974af9-c637-4152-b1e6-c8a4e053e8b6/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 00:38:55,277 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 00:38:55,279 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 00:38:55,279 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 00:38:55,280 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 00:38:55,287 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 00:38:55,287 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 00:38:55,287 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 00:38:55,288 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 00:38:55,288 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 00:38:55,288 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 00:38:55,289 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 00:38:55,289 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 00:38:55,289 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 00:38:55,290 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 00:38:55,290 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 00:38:55,290 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 00:38:55,290 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 00:38:55,291 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 00:38:55,291 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 00:38:55,292 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 00:38:55,292 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 00:38:55,292 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 00:38:55,292 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 00:38:55,293 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 00:38:55,293 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 00:38:55,293 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 00:38:55,293 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 00:38:55,293 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 00:38:55,294 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 00:38:55,294 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 00:38:55,294 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 00:38:55,294 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 00:38:55,295 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:38:55,295 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 00:38:55,295 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 00:38:55,295 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 00:38:55,296 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 00:38:55,296 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 00:38:55,296 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 00:38:55,296 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 00:38:55,296 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 00:38:55,297 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_7e974af9-c637-4152-b1e6-c8a4e053e8b6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e974af9-c637-4152-b1e6-c8a4e053e8b6/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d49205c4ffe20d5beac0ad3125002385f97f5ba1191dc9c85bce9eb1aba82790 [2021-11-21 00:38:55,593 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 00:38:55,615 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 00:38:55,618 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 00:38:55,619 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 00:38:55,620 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 00:38:55,622 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e974af9-c637-4152-b1e6-c8a4e053e8b6/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.1.ufo.BOUNDED-12.pals.c.v+cfa-reducer.c [2021-11-21 00:38:55,685 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e974af9-c637-4152-b1e6-c8a4e053e8b6/bin/utaipan-TEXQjIfE4P/data/aa8d23573/b3712275e0b5498d86c94a3a3d732967/FLAGbc35adf3e [2021-11-21 00:38:56,298 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 00:38:56,299 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e974af9-c637-4152-b1e6-c8a4e053e8b6/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.1.ufo.BOUNDED-12.pals.c.v+cfa-reducer.c [2021-11-21 00:38:56,322 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e974af9-c637-4152-b1e6-c8a4e053e8b6/bin/utaipan-TEXQjIfE4P/data/aa8d23573/b3712275e0b5498d86c94a3a3d732967/FLAGbc35adf3e [2021-11-21 00:38:56,605 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e974af9-c637-4152-b1e6-c8a4e053e8b6/bin/utaipan-TEXQjIfE4P/data/aa8d23573/b3712275e0b5498d86c94a3a3d732967 [2021-11-21 00:38:56,608 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 00:38:56,609 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 00:38:56,619 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 00:38:56,619 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 00:38:56,623 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 00:38:56,623 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:38:56" (1/1) ... [2021-11-21 00:38:56,627 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46a402b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:38:56, skipping insertion in model container [2021-11-21 00:38:56,628 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:38:56" (1/1) ... [2021-11-21 00:38:56,635 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 00:38:56,698 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 00:38:56,972 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_7e974af9-c637-4152-b1e6-c8a4e053e8b6/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.1.ufo.BOUNDED-12.pals.c.v+cfa-reducer.c[7365,7378] [2021-11-21 00:38:57,016 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:38:57,030 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 00:38:57,087 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_7e974af9-c637-4152-b1e6-c8a4e053e8b6/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.1.ufo.BOUNDED-12.pals.c.v+cfa-reducer.c[7365,7378] [2021-11-21 00:38:57,121 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:38:57,171 INFO L208 MainTranslator]: Completed translation [2021-11-21 00:38:57,171 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:38:57 WrapperNode [2021-11-21 00:38:57,172 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 00:38:57,173 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 00:38:57,173 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 00:38:57,173 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 00:38:57,181 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:38:57" (1/1) ... [2021-11-21 00:38:57,194 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:38:57" (1/1) ... [2021-11-21 00:38:57,269 INFO L137 Inliner]: procedures = 25, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 624 [2021-11-21 00:38:57,269 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 00:38:57,270 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 00:38:57,270 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 00:38:57,270 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 00:38:57,290 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:38:57" (1/1) ... [2021-11-21 00:38:57,290 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:38:57" (1/1) ... [2021-11-21 00:38:57,295 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:38:57" (1/1) ... [2021-11-21 00:38:57,295 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:38:57" (1/1) ... [2021-11-21 00:38:57,310 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:38:57" (1/1) ... [2021-11-21 00:38:57,334 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:38:57" (1/1) ... [2021-11-21 00:38:57,337 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:38:57" (1/1) ... [2021-11-21 00:38:57,342 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 00:38:57,343 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 00:38:57,344 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 00:38:57,344 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 00:38:57,345 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:38:57" (1/1) ... [2021-11-21 00:38:57,355 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:38:57,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e974af9-c637-4152-b1e6-c8a4e053e8b6/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:38:57,403 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e974af9-c637-4152-b1e6-c8a4e053e8b6/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 00:38:57,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e974af9-c637-4152-b1e6-c8a4e053e8b6/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 00:38:57,460 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 00:38:57,460 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 00:38:57,461 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 00:38:57,461 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 00:38:57,684 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 00:38:57,686 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 00:38:58,369 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 00:38:58,584 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 00:38:58,584 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-21 00:38:58,587 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:38:58 BoogieIcfgContainer [2021-11-21 00:38:58,587 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 00:38:58,591 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 00:38:58,591 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 00:38:58,597 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 00:38:58,597 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 12:38:56" (1/3) ... [2021-11-21 00:38:58,600 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77761eba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:38:58, skipping insertion in model container [2021-11-21 00:38:58,600 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:38:57" (2/3) ... [2021-11-21 00:38:58,600 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77761eba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:38:58, skipping insertion in model container [2021-11-21 00:38:58,601 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:38:58" (3/3) ... [2021-11-21 00:38:58,602 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.6.1.ufo.BOUNDED-12.pals.c.v+cfa-reducer.c [2021-11-21 00:38:58,609 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 00:38:58,609 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 00:38:58,684 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 00:38:58,694 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-21 00:38:58,695 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 00:38:58,729 INFO L276 IsEmpty]: Start isEmpty. Operand has 127 states, 125 states have (on average 1.696) internal successors, (212), 126 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:38:58,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-21 00:38:58,750 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:38:58,750 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] [2021-11-21 00:38:58,751 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:38:58,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:38:58,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1393050288, now seen corresponding path program 1 times [2021-11-21 00:38:58,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:38:58,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625451586] [2021-11-21 00:38:58,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:38:58,773 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:38:59,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:38:59,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:38:59,261 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:38:59,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625451586] [2021-11-21 00:38:59,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625451586] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:38:59,262 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:38:59,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:38:59,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813755998] [2021-11-21 00:38:59,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:38:59,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:38:59,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:38:59,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:38:59,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:38:59,304 INFO L87 Difference]: Start difference. First operand has 127 states, 125 states have (on average 1.696) internal successors, (212), 126 states have internal predecessors, (212), 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 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) [2021-11-21 00:38:59,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:38:59,495 INFO L93 Difference]: Finished difference Result 284 states and 449 transitions. [2021-11-21 00:38:59,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:38:59,501 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 [2021-11-21 00:38:59,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:38:59,516 INFO L225 Difference]: With dead ends: 284 [2021-11-21 00:38:59,517 INFO L226 Difference]: Without dead ends: 196 [2021-11-21 00:38:59,521 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 [2021-11-21 00:38:59,528 INFO L933 BasicCegarLoop]: 299 mSDtfsCounter, 159 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:38:59,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 409 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:38:59,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-11-21 00:38:59,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 194. [2021-11-21 00:38:59,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 1.4093264248704662) internal successors, (272), 193 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:38:59,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 272 transitions. [2021-11-21 00:38:59,636 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 272 transitions. Word has length 58 [2021-11-21 00:38:59,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:38:59,637 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 272 transitions. [2021-11-21 00:38:59,639 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) [2021-11-21 00:38:59,641 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 272 transitions. [2021-11-21 00:38:59,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-21 00:38:59,647 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:38:59,648 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] [2021-11-21 00:38:59,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 00:38:59,649 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:38:59,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:38:59,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1597156099, now seen corresponding path program 1 times [2021-11-21 00:38:59,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:38:59,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449135976] [2021-11-21 00:38:59,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:38:59,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:38:59,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:38:59,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:38:59,855 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:38:59,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449135976] [2021-11-21 00:38:59,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449135976] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:38:59,856 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:38:59,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:38:59,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575263337] [2021-11-21 00:38:59,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:38:59,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:38:59,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:38:59,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:38:59,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:38:59,861 INFO L87 Difference]: Start difference. First operand 194 states and 272 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 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) [2021-11-21 00:38:59,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:38:59,981 INFO L93 Difference]: Finished difference Result 474 states and 696 transitions. [2021-11-21 00:38:59,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:38:59,982 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 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 [2021-11-21 00:38:59,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:38:59,990 INFO L225 Difference]: With dead ends: 474 [2021-11-21 00:38:59,990 INFO L226 Difference]: Without dead ends: 323 [2021-11-21 00:38:59,996 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 [2021-11-21 00:38:59,998 INFO L933 BasicCegarLoop]: 237 mSDtfsCounter, 116 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:38:59,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 345 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:39:00,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-11-21 00:39:00,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 321. [2021-11-21 00:39:00,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 1.45) internal successors, (464), 320 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:39:00,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 464 transitions. [2021-11-21 00:39:00,052 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 464 transitions. Word has length 61 [2021-11-21 00:39:00,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:39:00,056 INFO L470 AbstractCegarLoop]: Abstraction has 321 states and 464 transitions. [2021-11-21 00:39:00,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 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) [2021-11-21 00:39:00,057 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 464 transitions. [2021-11-21 00:39:00,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-21 00:39:00,064 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:39:00,064 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:39:00,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 00:39:00,065 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:39:00,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:39:00,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1010174028, now seen corresponding path program 1 times [2021-11-21 00:39:00,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:39:00,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898158859] [2021-11-21 00:39:00,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:39:00,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:39:00,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:39:00,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:39:00,208 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:39:00,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898158859] [2021-11-21 00:39:00,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898158859] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:39:00,209 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:39:00,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:39:00,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528404882] [2021-11-21 00:39:00,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:39:00,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:39:00,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:39:00,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:39:00,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:39:00,212 INFO L87 Difference]: Start difference. First operand 321 states and 464 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:39:00,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:39:00,305 INFO L93 Difference]: Finished difference Result 833 states and 1238 transitions. [2021-11-21 00:39:00,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:39:00,306 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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 64 [2021-11-21 00:39:00,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:39:00,314 INFO L225 Difference]: With dead ends: 833 [2021-11-21 00:39:00,314 INFO L226 Difference]: Without dead ends: 555 [2021-11-21 00:39:00,338 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 [2021-11-21 00:39:00,340 INFO L933 BasicCegarLoop]: 218 mSDtfsCounter, 111 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:39:00,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 330 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:39:00,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2021-11-21 00:39:00,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 553. [2021-11-21 00:39:00,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 552 states have (on average 1.4710144927536233) internal successors, (812), 552 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:39:00,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 812 transitions. [2021-11-21 00:39:00,380 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 812 transitions. Word has length 64 [2021-11-21 00:39:00,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:39:00,381 INFO L470 AbstractCegarLoop]: Abstraction has 553 states and 812 transitions. [2021-11-21 00:39:00,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:39:00,381 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 812 transitions. [2021-11-21 00:39:00,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-21 00:39:00,383 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:39:00,383 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:39:00,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-21 00:39:00,383 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:39:00,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:39:00,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1760410912, now seen corresponding path program 1 times [2021-11-21 00:39:00,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:39:00,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049750086] [2021-11-21 00:39:00,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:39:00,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:39:00,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:39:00,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:39:00,466 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:39:00,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049750086] [2021-11-21 00:39:00,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049750086] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:39:00,467 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:39:00,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:39:00,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121499687] [2021-11-21 00:39:00,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:39:00,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:39:00,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:39:00,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:39:00,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:39:00,470 INFO L87 Difference]: Start difference. First operand 553 states and 812 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:39:00,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:39:00,596 INFO L93 Difference]: Finished difference Result 1485 states and 2214 transitions. [2021-11-21 00:39:00,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:39:00,597 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 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 67 [2021-11-21 00:39:00,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:39:00,610 INFO L225 Difference]: With dead ends: 1485 [2021-11-21 00:39:00,610 INFO L226 Difference]: Without dead ends: 975 [2021-11-21 00:39:00,612 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 [2021-11-21 00:39:00,622 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 106 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:39:00,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 315 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:39:00,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2021-11-21 00:39:00,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 973. [2021-11-21 00:39:00,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 973 states, 972 states have (on average 1.477366255144033) internal successors, (1436), 972 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:39:00,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 973 states to 973 states and 1436 transitions. [2021-11-21 00:39:00,702 INFO L78 Accepts]: Start accepts. Automaton has 973 states and 1436 transitions. Word has length 67 [2021-11-21 00:39:00,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:39:00,703 INFO L470 AbstractCegarLoop]: Abstraction has 973 states and 1436 transitions. [2021-11-21 00:39:00,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:39:00,704 INFO L276 IsEmpty]: Start isEmpty. Operand 973 states and 1436 transitions. [2021-11-21 00:39:00,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-21 00:39:00,705 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:39:00,706 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:39:00,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-21 00:39:00,706 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:39:00,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:39:00,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1283218006, now seen corresponding path program 1 times [2021-11-21 00:39:00,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:39:00,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712690749] [2021-11-21 00:39:00,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:39:00,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:39:00,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:39:00,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:39:00,819 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:39:00,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712690749] [2021-11-21 00:39:00,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712690749] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:39:00,819 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:39:00,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:39:00,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074987857] [2021-11-21 00:39:00,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:39:00,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:39:00,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:39:00,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:39:00,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:39:00,822 INFO L87 Difference]: Start difference. First operand 973 states and 1436 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:39:01,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:39:01,019 INFO L93 Difference]: Finished difference Result 2657 states and 3950 transitions. [2021-11-21 00:39:01,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:39:01,020 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 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 70 [2021-11-21 00:39:01,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:39:01,032 INFO L225 Difference]: With dead ends: 2657 [2021-11-21 00:39:01,032 INFO L226 Difference]: Without dead ends: 1727 [2021-11-21 00:39:01,034 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 [2021-11-21 00:39:01,035 INFO L933 BasicCegarLoop]: 180 mSDtfsCounter, 101 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:39:01,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 300 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:39:01,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1727 states. [2021-11-21 00:39:01,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1727 to 1725. [2021-11-21 00:39:01,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1725 states, 1724 states have (on average 1.4733178654292343) internal successors, (2540), 1724 states have internal predecessors, (2540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:39:01,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1725 states to 1725 states and 2540 transitions. [2021-11-21 00:39:01,182 INFO L78 Accepts]: Start accepts. Automaton has 1725 states and 2540 transitions. Word has length 70 [2021-11-21 00:39:01,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:39:01,182 INFO L470 AbstractCegarLoop]: Abstraction has 1725 states and 2540 transitions. [2021-11-21 00:39:01,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:39:01,183 INFO L276 IsEmpty]: Start isEmpty. Operand 1725 states and 2540 transitions. [2021-11-21 00:39:01,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-21 00:39:01,184 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:39:01,184 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:39:01,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-21 00:39:01,184 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:39:01,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:39:01,185 INFO L85 PathProgramCache]: Analyzing trace with hash -748422962, now seen corresponding path program 1 times [2021-11-21 00:39:01,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:39:01,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046205715] [2021-11-21 00:39:01,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:39:01,186 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:39:01,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:39:01,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:39:01,241 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:39:01,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046205715] [2021-11-21 00:39:01,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046205715] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:39:01,241 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:39:01,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:39:01,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132524543] [2021-11-21 00:39:01,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:39:01,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:39:01,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:39:01,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:39:01,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:39:01,244 INFO L87 Difference]: Start difference. First operand 1725 states and 2540 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:39:01,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:39:01,579 INFO L93 Difference]: Finished difference Result 4737 states and 6990 transitions. [2021-11-21 00:39:01,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:39:01,580 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 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 73 [2021-11-21 00:39:01,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:39:01,598 INFO L225 Difference]: With dead ends: 4737 [2021-11-21 00:39:01,599 INFO L226 Difference]: Without dead ends: 3055 [2021-11-21 00:39:01,602 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 [2021-11-21 00:39:01,604 INFO L933 BasicCegarLoop]: 161 mSDtfsCounter, 96 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:39:01,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 285 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:39:01,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3055 states. [2021-11-21 00:39:01,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3055 to 3053. [2021-11-21 00:39:01,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3053 states, 3052 states have (on average 1.4613368283093053) internal successors, (4460), 3052 states have internal predecessors, (4460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:39:01,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3053 states to 3053 states and 4460 transitions. [2021-11-21 00:39:01,882 INFO L78 Accepts]: Start accepts. Automaton has 3053 states and 4460 transitions. Word has length 73 [2021-11-21 00:39:01,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:39:01,883 INFO L470 AbstractCegarLoop]: Abstraction has 3053 states and 4460 transitions. [2021-11-21 00:39:01,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:39:01,883 INFO L276 IsEmpty]: Start isEmpty. Operand 3053 states and 4460 transitions. [2021-11-21 00:39:01,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-21 00:39:01,883 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:39:01,884 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:39:01,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-21 00:39:01,884 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:39:01,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:39:01,884 INFO L85 PathProgramCache]: Analyzing trace with hash -61988440, now seen corresponding path program 1 times [2021-11-21 00:39:01,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:39:01,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717627726] [2021-11-21 00:39:01,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:39:01,885 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:39:01,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:39:02,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:39:02,106 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:39:02,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717627726] [2021-11-21 00:39:02,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717627726] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:39:02,106 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:39:02,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-21 00:39:02,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601400092] [2021-11-21 00:39:02,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:39:02,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 00:39:02,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:39:02,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 00:39:02,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-21 00:39:02,108 INFO L87 Difference]: Start difference. First operand 3053 states and 4460 transitions. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:39:03,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:39:03,697 INFO L93 Difference]: Finished difference Result 18233 states and 26546 transitions. [2021-11-21 00:39:03,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 00:39:03,697 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 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 76 [2021-11-21 00:39:03,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:39:03,796 INFO L225 Difference]: With dead ends: 18233 [2021-11-21 00:39:03,797 INFO L226 Difference]: Without dead ends: 15223 [2021-11-21 00:39:03,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-21 00:39:03,806 INFO L933 BasicCegarLoop]: 439 mSDtfsCounter, 635 mSDsluCounter, 733 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 635 SdHoareTripleChecker+Valid, 1150 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:39:03,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [635 Valid, 1150 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:39:03,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15223 states. [2021-11-21 00:39:05,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15223 to 15213. [2021-11-21 00:39:05,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15213 states, 15212 states have (on average 1.4522745201156981) internal successors, (22092), 15212 states have internal predecessors, (22092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:39:05,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15213 states to 15213 states and 22092 transitions. [2021-11-21 00:39:05,282 INFO L78 Accepts]: Start accepts. Automaton has 15213 states and 22092 transitions. Word has length 76 [2021-11-21 00:39:05,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:39:05,283 INFO L470 AbstractCegarLoop]: Abstraction has 15213 states and 22092 transitions. [2021-11-21 00:39:05,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:39:05,283 INFO L276 IsEmpty]: Start isEmpty. Operand 15213 states and 22092 transitions. [2021-11-21 00:39:05,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-21 00:39:05,284 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:39:05,284 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:39:05,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-21 00:39:05,285 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:39:05,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:39:05,285 INFO L85 PathProgramCache]: Analyzing trace with hash -212209935, now seen corresponding path program 1 times [2021-11-21 00:39:05,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:39:05,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176586091] [2021-11-21 00:39:05,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:39:05,286 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:39:05,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:39:05,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:39:05,344 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:39:05,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176586091] [2021-11-21 00:39:05,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176586091] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:39:05,345 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:39:05,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 00:39:05,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891896833] [2021-11-21 00:39:05,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:39:05,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:39:05,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:39:05,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:39:05,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:39:05,346 INFO L87 Difference]: Start difference. First operand 15213 states and 22092 transitions. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:39:07,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:39:07,277 INFO L93 Difference]: Finished difference Result 38947 states and 56768 transitions. [2021-11-21 00:39:07,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 00:39:07,278 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 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 78 [2021-11-21 00:39:07,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:39:07,361 INFO L225 Difference]: With dead ends: 38947 [2021-11-21 00:39:07,361 INFO L226 Difference]: Without dead ends: 23777 [2021-11-21 00:39:07,387 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 [2021-11-21 00:39:07,388 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 676 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 676 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:39:07,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [676 Valid, 163 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:39:07,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23777 states. [2021-11-21 00:39:09,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23777 to 23775. [2021-11-21 00:39:09,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23775 states, 23774 states have (on average 1.4455287288634644) internal successors, (34366), 23774 states have internal predecessors, (34366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:39:09,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23775 states to 23775 states and 34366 transitions. [2021-11-21 00:39:09,292 INFO L78 Accepts]: Start accepts. Automaton has 23775 states and 34366 transitions. Word has length 78 [2021-11-21 00:39:09,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:39:09,292 INFO L470 AbstractCegarLoop]: Abstraction has 23775 states and 34366 transitions. [2021-11-21 00:39:09,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:39:09,293 INFO L276 IsEmpty]: Start isEmpty. Operand 23775 states and 34366 transitions. [2021-11-21 00:39:09,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-21 00:39:09,294 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:39:09,294 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:39:09,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-21 00:39:09,295 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:39:09,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:39:09,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1637904022, now seen corresponding path program 1 times [2021-11-21 00:39:09,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:39:09,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728263761] [2021-11-21 00:39:09,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:39:09,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:39:09,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:39:09,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:39:09,505 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:39:09,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728263761] [2021-11-21 00:39:09,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728263761] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:39:09,505 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:39:09,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-21 00:39:09,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919534715] [2021-11-21 00:39:09,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:39:09,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-21 00:39:09,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:39:09,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-21 00:39:09,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-21 00:39:09,507 INFO L87 Difference]: Start difference. First operand 23775 states and 34366 transitions. Second operand has 11 states, 11 states have (on average 7.090909090909091) internal successors, (78), 11 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:39:13,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:39:13,032 INFO L93 Difference]: Finished difference Result 44764 states and 64937 transitions. [2021-11-21 00:39:13,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-21 00:39:13,033 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 7.090909090909091) internal successors, (78), 11 states have internal predecessors, (78), 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 78 [2021-11-21 00:39:13,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:39:13,156 INFO L225 Difference]: With dead ends: 44764 [2021-11-21 00:39:13,156 INFO L226 Difference]: Without dead ends: 44762 [2021-11-21 00:39:13,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2021-11-21 00:39:13,169 INFO L933 BasicCegarLoop]: 564 mSDtfsCounter, 1700 mSDsluCounter, 3372 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1700 SdHoareTripleChecker+Valid, 3880 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:39:13,170 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1700 Valid, 3880 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 00:39:13,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44762 states. [2021-11-21 00:39:15,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44762 to 24335. [2021-11-21 00:39:15,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24335 states, 24334 states have (on average 1.445960384646996) internal successors, (35186), 24334 states have internal predecessors, (35186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:39:15,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24335 states to 24335 states and 35186 transitions. [2021-11-21 00:39:15,739 INFO L78 Accepts]: Start accepts. Automaton has 24335 states and 35186 transitions. Word has length 78 [2021-11-21 00:39:15,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:39:15,739 INFO L470 AbstractCegarLoop]: Abstraction has 24335 states and 35186 transitions. [2021-11-21 00:39:15,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.090909090909091) internal successors, (78), 11 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:39:15,739 INFO L276 IsEmpty]: Start isEmpty. Operand 24335 states and 35186 transitions. [2021-11-21 00:39:15,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-21 00:39:15,743 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:39:15,743 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:39:15,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-21 00:39:15,743 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:39:15,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:39:15,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1358053756, now seen corresponding path program 1 times [2021-11-21 00:39:15,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:39:15,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056224312] [2021-11-21 00:39:15,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:39:15,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:39:15,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:39:16,816 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:39:16,816 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:39:16,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056224312] [2021-11-21 00:39:16,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056224312] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:39:16,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975493744] [2021-11-21 00:39:16,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:39:16,817 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:39:16,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e974af9-c637-4152-b1e6-c8a4e053e8b6/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:39:16,819 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e974af9-c637-4152-b1e6-c8a4e053e8b6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:39:16,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e974af9-c637-4152-b1e6-c8a4e053e8b6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 00:39:16,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:39:16,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 80 conjunts are in the unsatisfiable core [2021-11-21 00:39:16,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:39:22,218 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:39:22,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:40:37,208 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:40:37,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975493744] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:40:37,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1082076493] [2021-11-21 00:40:37,237 INFO L159 IcfgInterpreter]: Started Sifa with 79 locations of interest [2021-11-21 00:40:37,238 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:40:37,243 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:40:37,248 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:40:37,248 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:40:37,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:40:37,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:40:37,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:40:37,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:40:37,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:40:37,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:40:37,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:40:37,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:40:37,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:40:37,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:40:37,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:40:37,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:40:37,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:40:37,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:40:37,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:40:37,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 30 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 31 [2021-11-21 00:40:37,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:40:37,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:40:37,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:40:37,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:40:37,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:40:37,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 15 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 31