./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec27_product24.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec27_product24.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8 --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 f1a760a25f6e6d96f820367881f3fbbc32febc8ce03434205938078db6a21524 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 00:52:54,155 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 00:52:54,158 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 00:52:54,202 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 00:52:54,203 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 00:52:54,204 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 00:52:54,206 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 00:52:54,209 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 00:52:54,212 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 00:52:54,214 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 00:52:54,215 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 00:52:54,217 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 00:52:54,218 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 00:52:54,219 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 00:52:54,221 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 00:52:54,223 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 00:52:54,225 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 00:52:54,226 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 00:52:54,229 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 00:52:54,232 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 00:52:54,235 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 00:52:54,237 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 00:52:54,239 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 00:52:54,240 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 00:52:54,245 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 00:52:54,246 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 00:52:54,246 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 00:52:54,247 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 00:52:54,248 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 00:52:54,250 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 00:52:54,250 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 00:52:54,252 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 00:52:54,253 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 00:52:54,254 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 00:52:54,256 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 00:52:54,256 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 00:52:54,257 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 00:52:54,258 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 00:52:54,258 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 00:52:54,260 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 00:52:54,266 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 00:52:54,268 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 00:52:54,325 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 00:52:54,325 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 00:52:54,328 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 00:52:54,328 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 00:52:54,328 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 00:52:54,329 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 00:52:54,329 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 00:52:54,329 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 00:52:54,329 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 00:52:54,330 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 00:52:54,331 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 00:52:54,331 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 00:52:54,332 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 00:52:54,332 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 00:52:54,332 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 00:52:54,333 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 00:52:54,334 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 00:52:54,334 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 00:52:54,334 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 00:52:54,334 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 00:52:54,335 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 00:52:54,335 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 00:52:54,335 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 00:52:54,336 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 00:52:54,336 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 00:52:54,336 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 00:52:54,336 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 00:52:54,337 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 00:52:54,337 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 00:52:54,339 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 00:52:54,339 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 00:52:54,340 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 00:52:54,340 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 00:52:54,340 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 00:52:54,340 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 00:52:54,341 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 00:52:54,341 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 00:52:54,341 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 00:52:54,341 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 00:52:54,342 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_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f1a760a25f6e6d96f820367881f3fbbc32febc8ce03434205938078db6a21524 [2021-11-07 00:52:54,649 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 00:52:54,684 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 00:52:54,687 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 00:52:54,688 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 00:52:54,689 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 00:52:54,691 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec27_product24.cil.c [2021-11-07 00:52:54,802 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/data/fc1c4964a/3fe4e46622e34f5fba5a04e581562fb3/FLAG19a48d37a [2021-11-07 00:52:55,613 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 00:52:55,617 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/sv-benchmarks/c/product-lines/email_spec27_product24.cil.c [2021-11-07 00:52:55,661 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/data/fc1c4964a/3fe4e46622e34f5fba5a04e581562fb3/FLAG19a48d37a [2021-11-07 00:52:55,764 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/data/fc1c4964a/3fe4e46622e34f5fba5a04e581562fb3 [2021-11-07 00:52:55,768 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 00:52:55,773 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 00:52:55,775 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 00:52:55,776 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 00:52:55,780 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 00:52:55,781 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:52:55" (1/1) ... [2021-11-07 00:52:55,783 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4333e564 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:52:55, skipping insertion in model container [2021-11-07 00:52:55,783 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:52:55" (1/1) ... [2021-11-07 00:52:55,794 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 00:52:55,900 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 00:52:56,520 WARN L228 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_41d71e98-3da6-4387-97b6-45816773fb77/sv-benchmarks/c/product-lines/email_spec27_product24.cil.c[62587,62600] [2021-11-07 00:52:56,527 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 00:52:56,541 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-07 00:52:56,542 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6a522b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:52:56, skipping insertion in model container [2021-11-07 00:52:56,542 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 00:52:56,542 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 00:52:56,545 INFO L168 Benchmark]: Toolchain (without parser) took 770.01 ms. Allocated memory is still 138.4 MB. Free memory was 97.8 MB in the beginning and 95.9 MB in the end (delta: 1.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-07 00:52:56,546 INFO L168 Benchmark]: CDTParser took 0.46 ms. Allocated memory is still 138.4 MB. Free memory was 108.5 MB in the beginning and 108.4 MB in the end (delta: 21.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 00:52:56,547 INFO L168 Benchmark]: CACSL2BoogieTranslator took 766.84 ms. Allocated memory is still 138.4 MB. Free memory was 97.5 MB in the beginning and 95.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-07 00:52:56,550 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.46 ms. Allocated memory is still 138.4 MB. Free memory was 108.5 MB in the beginning and 108.4 MB in the end (delta: 21.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 766.84 ms. Allocated memory is still 138.4 MB. Free memory was 97.5 MB in the beginning and 95.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 2572]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec27_product24.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8 --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 f1a760a25f6e6d96f820367881f3fbbc32febc8ce03434205938078db6a21524 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 00:52:59,264 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 00:52:59,268 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 00:52:59,310 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 00:52:59,311 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 00:52:59,317 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 00:52:59,320 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 00:52:59,328 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 00:52:59,331 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 00:52:59,333 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 00:52:59,334 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 00:52:59,337 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 00:52:59,338 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 00:52:59,344 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 00:52:59,346 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 00:52:59,348 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 00:52:59,350 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 00:52:59,353 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 00:52:59,359 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 00:52:59,365 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 00:52:59,367 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 00:52:59,369 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 00:52:59,371 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 00:52:59,374 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 00:52:59,383 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 00:52:59,384 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 00:52:59,384 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 00:52:59,385 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 00:52:59,386 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 00:52:59,387 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 00:52:59,387 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 00:52:59,388 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 00:52:59,389 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 00:52:59,390 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 00:52:59,391 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 00:52:59,391 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 00:52:59,392 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 00:52:59,393 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 00:52:59,393 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 00:52:59,394 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 00:52:59,395 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 00:52:59,396 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 00:52:59,423 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 00:52:59,423 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 00:52:59,424 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 00:52:59,424 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 00:52:59,425 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 00:52:59,425 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 00:52:59,425 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 00:52:59,425 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 00:52:59,426 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 00:52:59,426 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 00:52:59,427 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 00:52:59,427 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 00:52:59,427 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 00:52:59,427 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 00:52:59,428 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 00:52:59,428 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 00:52:59,428 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 00:52:59,428 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 00:52:59,429 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 00:52:59,429 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 00:52:59,429 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 00:52:59,429 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 00:52:59,429 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 00:52:59,430 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 00:52:59,430 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 00:52:59,430 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 00:52:59,430 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 00:52:59,431 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 00:52:59,431 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 00:52:59,431 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 00:52:59,431 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 00:52:59,432 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 00:52:59,432 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 00:52:59,432 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 00:52:59,432 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 00:52:59,432 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f1a760a25f6e6d96f820367881f3fbbc32febc8ce03434205938078db6a21524 [2021-11-07 00:52:59,893 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 00:52:59,917 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 00:52:59,920 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 00:52:59,922 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 00:52:59,923 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 00:52:59,924 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec27_product24.cil.c [2021-11-07 00:53:00,012 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/data/36ad22afc/96978a6aba34445ea139f11ba681a615/FLAG56ec18c31 [2021-11-07 00:53:00,885 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 00:53:00,889 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/sv-benchmarks/c/product-lines/email_spec27_product24.cil.c [2021-11-07 00:53:00,912 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/data/36ad22afc/96978a6aba34445ea139f11ba681a615/FLAG56ec18c31 [2021-11-07 00:53:01,023 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/data/36ad22afc/96978a6aba34445ea139f11ba681a615 [2021-11-07 00:53:01,033 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 00:53:01,035 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 00:53:01,037 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 00:53:01,037 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 00:53:01,048 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 00:53:01,049 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:53:01" (1/1) ... [2021-11-07 00:53:01,055 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49ea1b9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:53:01, skipping insertion in model container [2021-11-07 00:53:01,055 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:53:01" (1/1) ... [2021-11-07 00:53:01,064 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 00:53:01,182 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 00:53:01,888 WARN L228 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_41d71e98-3da6-4387-97b6-45816773fb77/sv-benchmarks/c/product-lines/email_spec27_product24.cil.c[62587,62600] [2021-11-07 00:53:01,894 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 00:53:01,913 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 00:53:01,935 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 00:53:02,080 WARN L228 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_41d71e98-3da6-4387-97b6-45816773fb77/sv-benchmarks/c/product-lines/email_spec27_product24.cil.c[62587,62600] [2021-11-07 00:53:02,082 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 00:53:02,089 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 00:53:02,201 WARN L228 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_41d71e98-3da6-4387-97b6-45816773fb77/sv-benchmarks/c/product-lines/email_spec27_product24.cil.c[62587,62600] [2021-11-07 00:53:02,205 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 00:53:02,248 INFO L208 MainTranslator]: Completed translation [2021-11-07 00:53:02,248 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:53:02 WrapperNode [2021-11-07 00:53:02,249 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 00:53:02,250 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 00:53:02,250 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 00:53:02,250 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 00:53:02,270 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:53:02" (1/1) ... [2021-11-07 00:53:02,307 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:53:02" (1/1) ... [2021-11-07 00:53:02,448 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 00:53:02,449 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 00:53:02,450 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 00:53:02,450 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 00:53:02,461 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:53:02" (1/1) ... [2021-11-07 00:53:02,461 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:53:02" (1/1) ... [2021-11-07 00:53:02,480 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:53:02" (1/1) ... [2021-11-07 00:53:02,488 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:53:02" (1/1) ... [2021-11-07 00:53:02,574 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:53:02" (1/1) ... [2021-11-07 00:53:02,622 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:53:02" (1/1) ... [2021-11-07 00:53:02,644 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:53:02" (1/1) ... [2021-11-07 00:53:02,665 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 00:53:02,666 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 00:53:02,667 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 00:53:02,667 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 00:53:02,668 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:53:02" (1/1) ... [2021-11-07 00:53:02,676 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 00:53:02,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 00:53:02,709 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 00:53:02,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 00:53:02,777 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 00:53:02,777 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 00:53:02,778 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 00:53:02,778 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 00:53:02,778 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 00:53:07,701 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 00:53:07,701 INFO L299 CfgBuilder]: Removed 331 assume(true) statements. [2021-11-07 00:53:07,704 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:53:07 BoogieIcfgContainer [2021-11-07 00:53:07,705 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 00:53:07,707 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 00:53:07,707 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 00:53:07,711 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 00:53:07,711 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:53:01" (1/3) ... [2021-11-07 00:53:07,712 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48c87118 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:53:07, skipping insertion in model container [2021-11-07 00:53:07,712 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:53:02" (2/3) ... [2021-11-07 00:53:07,713 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48c87118 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:53:07, skipping insertion in model container [2021-11-07 00:53:07,713 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:53:07" (3/3) ... [2021-11-07 00:53:07,714 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec27_product24.cil.c [2021-11-07 00:53:07,721 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 00:53:07,721 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-07 00:53:07,781 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 00:53:07,789 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 [2021-11-07 00:53:07,789 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-07 00:53:07,825 INFO L276 IsEmpty]: Start isEmpty. Operand has 495 states, 492 states have (on average 1.7459349593495934) internal successors, (859), 494 states have internal predecessors, (859), 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) [2021-11-07 00:53:07,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-07 00:53:07,853 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:53:07,853 INFO L513 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] [2021-11-07 00:53:07,854 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:53:07,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:53:07,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1448452338, now seen corresponding path program 1 times [2021-11-07 00:53:07,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:53:07,882 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1956971248] [2021-11-07 00:53:07,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:53:07,883 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:53:07,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:53:07,887 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:53:07,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 00:53:08,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:53:08,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 00:53:08,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:53:08,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:53:08,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:53:08,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:53:08,871 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:53:08,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1956971248] [2021-11-07 00:53:08,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1956971248] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:53:08,872 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:53:08,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 00:53:08,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720649831] [2021-11-07 00:53:08,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 00:53:08,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:53:08,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 00:53:08,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 00:53:08,909 INFO L87 Difference]: Start difference. First operand has 495 states, 492 states have (on average 1.7459349593495934) internal successors, (859), 494 states have internal predecessors, (859), 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 2 states, 2 states have (on average 24.0) internal successors, (48), 2 states have internal predecessors, (48), 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) [2021-11-07 00:53:09,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:53:09,006 INFO L93 Difference]: Finished difference Result 744 states and 1270 transitions. [2021-11-07 00:53:09,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 00:53:09,008 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 24.0) internal successors, (48), 2 states have internal predecessors, (48), 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 48 [2021-11-07 00:53:09,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:53:09,046 INFO L225 Difference]: With dead ends: 744 [2021-11-07 00:53:09,051 INFO L226 Difference]: Without dead ends: 447 [2021-11-07 00:53:09,058 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 00:53:09,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-11-07 00:53:09,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 447. [2021-11-07 00:53:09,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 445 states have (on average 1.7483146067415731) internal successors, (778), 446 states have internal predecessors, (778), 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) [2021-11-07 00:53:09,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 778 transitions. [2021-11-07 00:53:09,142 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 778 transitions. Word has length 48 [2021-11-07 00:53:09,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:53:09,143 INFO L470 AbstractCegarLoop]: Abstraction has 447 states and 778 transitions. [2021-11-07 00:53:09,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 24.0) internal successors, (48), 2 states have internal predecessors, (48), 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) [2021-11-07 00:53:09,144 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 778 transitions. [2021-11-07 00:53:09,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-07 00:53:09,147 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:53:09,147 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:53:09,163 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-07 00:53:09,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:53:09,361 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:53:09,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:53:09,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1420159291, now seen corresponding path program 1 times [2021-11-07 00:53:09,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:53:09,363 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [298228584] [2021-11-07 00:53:09,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:53:09,364 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:53:09,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:53:09,369 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:53:09,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 00:53:09,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:53:09,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 00:53:09,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:53:10,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:53:10,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:53:10,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:53:10,209 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:53:10,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [298228584] [2021-11-07 00:53:10,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [298228584] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:53:10,210 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:53:10,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 00:53:10,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827655947] [2021-11-07 00:53:10,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 00:53:10,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:53:10,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 00:53:10,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 00:53:10,215 INFO L87 Difference]: Start difference. First operand 447 states and 778 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 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) [2021-11-07 00:53:10,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:53:10,320 INFO L93 Difference]: Finished difference Result 1311 states and 2286 transitions. [2021-11-07 00:53:10,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 00:53:10,320 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-11-07 00:53:10,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:53:10,326 INFO L225 Difference]: With dead ends: 1311 [2021-11-07 00:53:10,327 INFO L226 Difference]: Without dead ends: 879 [2021-11-07 00:53:10,330 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 00:53:10,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2021-11-07 00:53:10,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 446. [2021-11-07 00:53:10,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 444 states have (on average 1.740990990990991) internal successors, (773), 445 states have internal predecessors, (773), 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) [2021-11-07 00:53:10,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 773 transitions. [2021-11-07 00:53:10,367 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 773 transitions. Word has length 49 [2021-11-07 00:53:10,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:53:10,367 INFO L470 AbstractCegarLoop]: Abstraction has 446 states and 773 transitions. [2021-11-07 00:53:10,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 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) [2021-11-07 00:53:10,368 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 773 transitions. [2021-11-07 00:53:10,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-07 00:53:10,370 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:53:10,370 INFO L513 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] [2021-11-07 00:53:10,388 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 00:53:10,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:53:10,585 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:53:10,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:53:10,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1238332255, now seen corresponding path program 1 times [2021-11-07 00:53:10,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:53:10,587 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1771128562] [2021-11-07 00:53:10,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:53:10,588 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:53:10,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:53:10,593 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:53:10,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 00:53:11,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:53:11,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 00:53:11,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:53:11,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:53:11,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:53:11,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:53:11,456 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:53:11,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1771128562] [2021-11-07 00:53:11,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1771128562] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:53:11,456 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:53:11,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 00:53:11,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117792367] [2021-11-07 00:53:11,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 00:53:11,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:53:11,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 00:53:11,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 00:53:11,459 INFO L87 Difference]: Start difference. First operand 446 states and 773 transitions. Second operand has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 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) [2021-11-07 00:53:11,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:53:11,741 INFO L93 Difference]: Finished difference Result 1701 states and 2954 transitions. [2021-11-07 00:53:11,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 00:53:11,742 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 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 51 [2021-11-07 00:53:11,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:53:11,752 INFO L225 Difference]: With dead ends: 1701 [2021-11-07 00:53:11,752 INFO L226 Difference]: Without dead ends: 1273 [2021-11-07 00:53:11,753 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 00:53:11,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1273 states. [2021-11-07 00:53:11,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1273 to 445. [2021-11-07 00:53:11,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 443 states have (on average 1.7358916478555304) internal successors, (769), 444 states have internal predecessors, (769), 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) [2021-11-07 00:53:11,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 769 transitions. [2021-11-07 00:53:11,798 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 769 transitions. Word has length 51 [2021-11-07 00:53:11,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:53:11,798 INFO L470 AbstractCegarLoop]: Abstraction has 445 states and 769 transitions. [2021-11-07 00:53:11,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 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) [2021-11-07 00:53:11,799 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 769 transitions. [2021-11-07 00:53:11,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 00:53:11,800 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:53:11,801 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:53:11,827 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 00:53:12,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:53:12,018 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:53:12,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:53:12,019 INFO L85 PathProgramCache]: Analyzing trace with hash 1352417332, now seen corresponding path program 1 times [2021-11-07 00:53:12,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:53:12,020 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1555660382] [2021-11-07 00:53:12,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:53:12,021 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:53:12,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:53:12,022 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:53:12,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 00:53:12,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:53:12,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 00:53:12,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:53:12,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:53:12,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:53:12,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:53:12,930 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:53:12,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1555660382] [2021-11-07 00:53:12,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1555660382] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:53:12,930 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:53:12,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 00:53:12,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496483554] [2021-11-07 00:53:12,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 00:53:12,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:53:12,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 00:53:12,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 00:53:12,933 INFO L87 Difference]: Start difference. First operand 445 states and 769 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:53:13,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:53:13,032 INFO L93 Difference]: Finished difference Result 887 states and 1535 transitions. [2021-11-07 00:53:13,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 00:53:13,033 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-07 00:53:13,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:53:13,037 INFO L225 Difference]: With dead ends: 887 [2021-11-07 00:53:13,037 INFO L226 Difference]: Without dead ends: 450 [2021-11-07 00:53:13,038 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 00:53:13,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-11-07 00:53:13,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 445. [2021-11-07 00:53:13,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 443 states have (on average 1.7291196388261851) internal successors, (766), 444 states have internal predecessors, (766), 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) [2021-11-07 00:53:13,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 766 transitions. [2021-11-07 00:53:13,073 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 766 transitions. Word has length 52 [2021-11-07 00:53:13,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:53:13,073 INFO L470 AbstractCegarLoop]: Abstraction has 445 states and 766 transitions. [2021-11-07 00:53:13,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:53:13,074 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 766 transitions. [2021-11-07 00:53:13,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-07 00:53:13,075 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:53:13,076 INFO L513 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] [2021-11-07 00:53:13,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 00:53:13,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:53:13,294 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:53:13,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:53:13,294 INFO L85 PathProgramCache]: Analyzing trace with hash -2036988023, now seen corresponding path program 1 times [2021-11-07 00:53:13,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:53:13,296 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [740668771] [2021-11-07 00:53:13,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:53:13,297 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:53:13,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:53:13,298 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:53:13,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 00:53:13,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:53:13,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 00:53:13,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:53:14,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:53:14,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:53:14,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:53:14,211 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:53:14,214 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [740668771] [2021-11-07 00:53:14,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [740668771] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:53:14,214 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:53:14,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 00:53:14,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332558652] [2021-11-07 00:53:14,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 00:53:14,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:53:14,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 00:53:14,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 00:53:14,224 INFO L87 Difference]: Start difference. First operand 445 states and 766 transitions. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 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) [2021-11-07 00:53:14,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:53:14,568 INFO L93 Difference]: Finished difference Result 1688 states and 2930 transitions. [2021-11-07 00:53:14,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 00:53:14,569 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 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 53 [2021-11-07 00:53:14,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:53:14,579 INFO L225 Difference]: With dead ends: 1688 [2021-11-07 00:53:14,579 INFO L226 Difference]: Without dead ends: 1269 [2021-11-07 00:53:14,580 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 00:53:14,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1269 states. [2021-11-07 00:53:14,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1269 to 445. [2021-11-07 00:53:14,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 443 states have (on average 1.7223476297968396) internal successors, (763), 444 states have internal predecessors, (763), 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) [2021-11-07 00:53:14,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 763 transitions. [2021-11-07 00:53:14,631 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 763 transitions. Word has length 53 [2021-11-07 00:53:14,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:53:14,632 INFO L470 AbstractCegarLoop]: Abstraction has 445 states and 763 transitions. [2021-11-07 00:53:14,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 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) [2021-11-07 00:53:14,632 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 763 transitions. [2021-11-07 00:53:14,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-07 00:53:14,634 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:53:14,634 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:53:14,656 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 00:53:14,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:53:14,848 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:53:14,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:53:14,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1595860860, now seen corresponding path program 1 times [2021-11-07 00:53:14,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:53:14,849 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1702084902] [2021-11-07 00:53:14,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:53:14,850 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:53:14,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:53:14,851 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:53:14,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 00:53:15,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:53:15,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 00:53:15,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:53:15,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:53:15,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:53:15,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:53:15,731 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:53:15,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1702084902] [2021-11-07 00:53:15,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1702084902] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:53:15,732 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:53:15,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 00:53:15,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373636493] [2021-11-07 00:53:15,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 00:53:15,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:53:15,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 00:53:15,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 00:53:15,735 INFO L87 Difference]: Start difference. First operand 445 states and 763 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 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) [2021-11-07 00:53:15,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:53:15,837 INFO L93 Difference]: Finished difference Result 1065 states and 1829 transitions. [2021-11-07 00:53:15,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 00:53:15,838 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 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 55 [2021-11-07 00:53:15,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:53:15,844 INFO L225 Difference]: With dead ends: 1065 [2021-11-07 00:53:15,845 INFO L226 Difference]: Without dead ends: 864 [2021-11-07 00:53:15,846 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 00:53:15,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 864 states. [2021-11-07 00:53:15,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 864 to 663. [2021-11-07 00:53:15,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 663 states, 661 states have (on average 1.7564296520423601) internal successors, (1161), 662 states have internal predecessors, (1161), 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) [2021-11-07 00:53:15,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 1161 transitions. [2021-11-07 00:53:15,914 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 1161 transitions. Word has length 55 [2021-11-07 00:53:15,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:53:15,915 INFO L470 AbstractCegarLoop]: Abstraction has 663 states and 1161 transitions. [2021-11-07 00:53:15,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 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) [2021-11-07 00:53:15,915 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 1161 transitions. [2021-11-07 00:53:15,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 00:53:15,918 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:53:15,918 INFO L513 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] [2021-11-07 00:53:15,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 00:53:16,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:53:16,133 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:53:16,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:53:16,133 INFO L85 PathProgramCache]: Analyzing trace with hash 706899189, now seen corresponding path program 1 times [2021-11-07 00:53:16,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:53:16,134 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2117540690] [2021-11-07 00:53:16,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:53:16,134 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:53:16,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:53:16,135 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:53:16,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 00:53:16,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:53:16,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 00:53:16,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:53:16,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:53:16,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:53:17,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:53:17,092 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:53:17,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2117540690] [2021-11-07 00:53:17,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2117540690] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:53:17,092 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:53:17,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 00:53:17,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958813567] [2021-11-07 00:53:17,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 00:53:17,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:53:17,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 00:53:17,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:53:17,094 INFO L87 Difference]: Start difference. First operand 663 states and 1161 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) [2021-11-07 00:53:17,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:53:17,206 INFO L93 Difference]: Finished difference Result 1609 states and 2824 transitions. [2021-11-07 00:53:17,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 00:53:17,207 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 [2021-11-07 00:53:17,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:53:17,215 INFO L225 Difference]: With dead ends: 1609 [2021-11-07 00:53:17,215 INFO L226 Difference]: Without dead ends: 1030 [2021-11-07 00:53:17,217 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:53:17,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1030 states. [2021-11-07 00:53:17,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1030 to 829. [2021-11-07 00:53:17,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 829 states, 827 states have (on average 1.7678355501813785) internal successors, (1462), 828 states have internal predecessors, (1462), 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) [2021-11-07 00:53:17,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 1462 transitions. [2021-11-07 00:53:17,308 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 1462 transitions. Word has length 67 [2021-11-07 00:53:17,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:53:17,309 INFO L470 AbstractCegarLoop]: Abstraction has 829 states and 1462 transitions. [2021-11-07 00:53:17,309 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) [2021-11-07 00:53:17,310 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 1462 transitions. [2021-11-07 00:53:17,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 00:53:17,312 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:53:17,312 INFO L513 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] [2021-11-07 00:53:17,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 00:53:17,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:53:17,530 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:53:17,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:53:17,530 INFO L85 PathProgramCache]: Analyzing trace with hash -915963564, now seen corresponding path program 1 times [2021-11-07 00:53:17,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:53:17,531 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1411276462] [2021-11-07 00:53:17,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:53:17,531 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:53:17,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:53:17,533 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:53:17,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 00:53:18,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:53:18,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 00:53:18,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:53:18,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:53:18,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:53:18,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:53:18,514 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:53:18,514 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1411276462] [2021-11-07 00:53:18,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1411276462] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:53:18,514 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:53:18,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 00:53:18,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007296291] [2021-11-07 00:53:18,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 00:53:18,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:53:18,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 00:53:18,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:53:18,517 INFO L87 Difference]: Start difference. First operand 829 states and 1462 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 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) [2021-11-07 00:53:18,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:53:18,676 INFO L93 Difference]: Finished difference Result 2139 states and 3792 transitions. [2021-11-07 00:53:18,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 00:53:18,677 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 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 68 [2021-11-07 00:53:18,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:53:18,687 INFO L225 Difference]: With dead ends: 2139 [2021-11-07 00:53:18,688 INFO L226 Difference]: Without dead ends: 1402 [2021-11-07 00:53:18,691 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:53:18,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1402 states. [2021-11-07 00:53:18,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1402 to 1201. [2021-11-07 00:53:18,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1201 states, 1199 states have (on average 1.7848206839032528) internal successors, (2140), 1200 states have internal predecessors, (2140), 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) [2021-11-07 00:53:18,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1201 states to 1201 states and 2140 transitions. [2021-11-07 00:53:18,841 INFO L78 Accepts]: Start accepts. Automaton has 1201 states and 2140 transitions. Word has length 68 [2021-11-07 00:53:18,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:53:18,842 INFO L470 AbstractCegarLoop]: Abstraction has 1201 states and 2140 transitions. [2021-11-07 00:53:18,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 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) [2021-11-07 00:53:18,842 INFO L276 IsEmpty]: Start isEmpty. Operand 1201 states and 2140 transitions. [2021-11-07 00:53:18,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 00:53:18,846 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:53:18,846 INFO L513 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] [2021-11-07 00:53:18,874 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 00:53:19,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:53:19,068 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:53:19,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:53:19,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1421693475, now seen corresponding path program 1 times [2021-11-07 00:53:19,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:53:19,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1628213994] [2021-11-07 00:53:19,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:53:19,069 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:53:19,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:53:19,071 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:53:19,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 00:53:19,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:53:19,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 00:53:19,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:53:19,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:53:19,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:53:20,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:53:20,045 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:53:20,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1628213994] [2021-11-07 00:53:20,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1628213994] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:53:20,046 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:53:20,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 00:53:20,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119491506] [2021-11-07 00:53:20,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 00:53:20,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:53:20,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 00:53:20,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:53:20,048 INFO L87 Difference]: Start difference. First operand 1201 states and 2140 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:53:20,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:53:20,241 INFO L93 Difference]: Finished difference Result 3235 states and 5795 transitions. [2021-11-07 00:53:20,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 00:53:20,241 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-07 00:53:20,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:53:20,257 INFO L225 Difference]: With dead ends: 3235 [2021-11-07 00:53:20,258 INFO L226 Difference]: Without dead ends: 2134 [2021-11-07 00:53:20,260 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:53:20,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2134 states. [2021-11-07 00:53:20,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2134 to 1933. [2021-11-07 00:53:20,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1933 states, 1931 states have (on average 1.799585706887623) internal successors, (3475), 1932 states have internal predecessors, (3475), 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) [2021-11-07 00:53:20,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1933 states to 1933 states and 3475 transitions. [2021-11-07 00:53:20,464 INFO L78 Accepts]: Start accepts. Automaton has 1933 states and 3475 transitions. Word has length 69 [2021-11-07 00:53:20,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:53:20,464 INFO L470 AbstractCegarLoop]: Abstraction has 1933 states and 3475 transitions. [2021-11-07 00:53:20,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:53:20,465 INFO L276 IsEmpty]: Start isEmpty. Operand 1933 states and 3475 transitions. [2021-11-07 00:53:20,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 00:53:20,476 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:53:20,476 INFO L513 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] [2021-11-07 00:53:20,498 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 00:53:20,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:53:20,694 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:53:20,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:53:20,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1084690525, now seen corresponding path program 1 times [2021-11-07 00:53:20,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:53:20,695 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [682445168] [2021-11-07 00:53:20,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:53:20,695 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:53:20,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:53:20,696 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:53:20,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 00:53:21,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:53:21,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 00:53:21,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:53:21,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:53:21,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:53:21,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:53:21,700 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:53:21,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [682445168] [2021-11-07 00:53:21,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [682445168] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:53:21,700 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:53:21,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 00:53:21,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207443366] [2021-11-07 00:53:21,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 00:53:21,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:53:21,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 00:53:21,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:53:21,702 INFO L87 Difference]: Start difference. First operand 1933 states and 3475 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) [2021-11-07 00:53:21,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:53:21,954 INFO L93 Difference]: Finished difference Result 5167 states and 9319 transitions. [2021-11-07 00:53:21,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 00:53:21,954 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 [2021-11-07 00:53:21,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:53:21,977 INFO L225 Difference]: With dead ends: 5167 [2021-11-07 00:53:21,978 INFO L226 Difference]: Without dead ends: 3368 [2021-11-07 00:53:21,981 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:53:21,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3368 states. [2021-11-07 00:53:22,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3368 to 3167. [2021-11-07 00:53:22,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3167 states, 3165 states have (on average 1.8072669826224328) internal successors, (5720), 3166 states have internal predecessors, (5720), 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) [2021-11-07 00:53:22,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3167 states to 3167 states and 5720 transitions. [2021-11-07 00:53:22,284 INFO L78 Accepts]: Start accepts. Automaton has 3167 states and 5720 transitions. Word has length 70 [2021-11-07 00:53:22,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:53:22,285 INFO L470 AbstractCegarLoop]: Abstraction has 3167 states and 5720 transitions. [2021-11-07 00:53:22,285 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) [2021-11-07 00:53:22,285 INFO L276 IsEmpty]: Start isEmpty. Operand 3167 states and 5720 transitions. [2021-11-07 00:53:22,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 00:53:22,291 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:53:22,291 INFO L513 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] [2021-11-07 00:53:22,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 00:53:22,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:53:22,505 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:53:22,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:53:22,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1234559956, now seen corresponding path program 1 times [2021-11-07 00:53:22,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:53:22,506 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [745791368] [2021-11-07 00:53:22,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:53:22,506 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:53:22,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:53:22,508 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:53:22,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 00:53:23,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:53:23,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 00:53:23,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:53:23,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:53:23,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:53:23,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:53:23,708 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:53:23,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [745791368] [2021-11-07 00:53:23,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [745791368] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:53:23,709 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:53:23,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 00:53:23,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662474191] [2021-11-07 00:53:23,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 00:53:23,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:53:23,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 00:53:23,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:53:23,711 INFO L87 Difference]: Start difference. First operand 3167 states and 5720 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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) [2021-11-07 00:53:24,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:53:24,079 INFO L93 Difference]: Finished difference Result 8585 states and 15537 transitions. [2021-11-07 00:53:24,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 00:53:24,080 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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 71 [2021-11-07 00:53:24,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:53:24,155 INFO L225 Difference]: With dead ends: 8585 [2021-11-07 00:53:24,156 INFO L226 Difference]: Without dead ends: 5586 [2021-11-07 00:53:24,161 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:53:24,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5586 states. [2021-11-07 00:53:24,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5586 to 5385. [2021-11-07 00:53:24,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5385 states, 5383 states have (on average 1.8103288129295931) internal successors, (9745), 5384 states have internal predecessors, (9745), 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) [2021-11-07 00:53:24,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5385 states to 5385 states and 9745 transitions. [2021-11-07 00:53:24,634 INFO L78 Accepts]: Start accepts. Automaton has 5385 states and 9745 transitions. Word has length 71 [2021-11-07 00:53:24,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:53:24,635 INFO L470 AbstractCegarLoop]: Abstraction has 5385 states and 9745 transitions. [2021-11-07 00:53:24,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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) [2021-11-07 00:53:24,636 INFO L276 IsEmpty]: Start isEmpty. Operand 5385 states and 9745 transitions. [2021-11-07 00:53:24,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 00:53:24,646 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:53:24,646 INFO L513 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] [2021-11-07 00:53:24,669 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 00:53:24,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:53:24,865 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:53:24,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:53:24,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1580216372, now seen corresponding path program 1 times [2021-11-07 00:53:24,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:53:24,866 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1530447925] [2021-11-07 00:53:24,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:53:24,866 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:53:24,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:53:24,869 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:53:24,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 00:53:25,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:53:25,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 00:53:25,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:53:25,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:53:25,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:53:26,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:53:26,015 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:53:26,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1530447925] [2021-11-07 00:53:26,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1530447925] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:53:26,016 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:53:26,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 00:53:26,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105753855] [2021-11-07 00:53:26,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 00:53:26,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:53:26,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 00:53:26,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:53:26,017 INFO L87 Difference]: Start difference. First operand 5385 states and 9745 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:53:26,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:53:26,721 INFO L93 Difference]: Finished difference Result 15565 states and 28223 transitions. [2021-11-07 00:53:26,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 00:53:26,722 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-07 00:53:26,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:53:26,796 INFO L225 Difference]: With dead ends: 15565 [2021-11-07 00:53:26,796 INFO L226 Difference]: Without dead ends: 10356 [2021-11-07 00:53:26,807 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:53:26,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10356 states. [2021-11-07 00:53:27,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10356 to 10155. [2021-11-07 00:53:27,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10155 states, 10153 states have (on average 1.8124692209199251) internal successors, (18402), 10154 states have internal predecessors, (18402), 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) [2021-11-07 00:53:27,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10155 states to 10155 states and 18402 transitions. [2021-11-07 00:53:27,683 INFO L78 Accepts]: Start accepts. Automaton has 10155 states and 18402 transitions. Word has length 72 [2021-11-07 00:53:27,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:53:27,683 INFO L470 AbstractCegarLoop]: Abstraction has 10155 states and 18402 transitions. [2021-11-07 00:53:27,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:53:27,684 INFO L276 IsEmpty]: Start isEmpty. Operand 10155 states and 18402 transitions. [2021-11-07 00:53:27,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 00:53:27,695 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:53:27,696 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:53:27,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 00:53:27,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:53:27,909 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:53:27,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:53:27,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1203531556, now seen corresponding path program 1 times [2021-11-07 00:53:27,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:53:27,911 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [68864511] [2021-11-07 00:53:27,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:53:27,911 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:53:27,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:53:27,913 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:53:27,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 00:53:28,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:53:28,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 00:53:28,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:53:28,845 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 00:53:28,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:53:29,073 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 00:53:29,074 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:53:29,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [68864511] [2021-11-07 00:53:29,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [68864511] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:53:29,074 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:53:29,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 00:53:29,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175943710] [2021-11-07 00:53:29,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 00:53:29,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:53:29,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 00:53:29,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 00:53:29,076 INFO L87 Difference]: Start difference. First operand 10155 states and 18402 transitions. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 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) [2021-11-07 00:53:32,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:53:32,033 INFO L93 Difference]: Finished difference Result 25024 states and 45359 transitions. [2021-11-07 00:53:32,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 00:53:32,034 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 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 [2021-11-07 00:53:32,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:53:32,092 INFO L225 Difference]: With dead ends: 25024 [2021-11-07 00:53:32,092 INFO L226 Difference]: Without dead ends: 15123 [2021-11-07 00:53:32,107 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 00:53:32,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15123 states. [2021-11-07 00:53:32,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15123 to 10122. [2021-11-07 00:53:32,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10122 states, 10120 states have (on average 1.8053359683794465) internal successors, (18270), 10121 states have internal predecessors, (18270), 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) [2021-11-07 00:53:32,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10122 states to 10122 states and 18270 transitions. [2021-11-07 00:53:32,890 INFO L78 Accepts]: Start accepts. Automaton has 10122 states and 18270 transitions. Word has length 73 [2021-11-07 00:53:32,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:53:32,890 INFO L470 AbstractCegarLoop]: Abstraction has 10122 states and 18270 transitions. [2021-11-07 00:53:32,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 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) [2021-11-07 00:53:32,891 INFO L276 IsEmpty]: Start isEmpty. Operand 10122 states and 18270 transitions. [2021-11-07 00:53:32,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 00:53:32,901 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:53:32,901 INFO L513 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] [2021-11-07 00:53:32,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 00:53:33,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:53:33,116 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:53:33,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:53:33,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1789058237, now seen corresponding path program 1 times [2021-11-07 00:53:33,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:53:33,118 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1591456780] [2021-11-07 00:53:33,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:53:33,118 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:53:33,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:53:33,119 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:53:33,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 00:53:33,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:53:34,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 00:53:34,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:53:34,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:53:34,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:53:34,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:53:34,442 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:53:34,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1591456780] [2021-11-07 00:53:34,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1591456780] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:53:34,442 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:53:34,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 00:53:34,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495787232] [2021-11-07 00:53:34,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 00:53:34,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:53:34,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 00:53:34,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:53:34,445 INFO L87 Difference]: Start difference. First operand 10122 states and 18270 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) [2021-11-07 00:53:35,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:53:35,466 INFO L93 Difference]: Finished difference Result 29608 states and 53505 transitions. [2021-11-07 00:53:35,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 00:53:35,467 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 [2021-11-07 00:53:35,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:53:35,537 INFO L225 Difference]: With dead ends: 29608 [2021-11-07 00:53:35,537 INFO L226 Difference]: Without dead ends: 19669 [2021-11-07 00:53:35,553 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:53:35,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19669 states. [2021-11-07 00:53:36,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19669 to 19468. [2021-11-07 00:53:36,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19468 states, 19466 states have (on average 1.8049419500667832) internal successors, (35135), 19467 states have internal predecessors, (35135), 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) [2021-11-07 00:53:36,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19468 states to 19468 states and 35135 transitions. [2021-11-07 00:53:36,603 INFO L78 Accepts]: Start accepts. Automaton has 19468 states and 35135 transitions. Word has length 73 [2021-11-07 00:53:36,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:53:36,604 INFO L470 AbstractCegarLoop]: Abstraction has 19468 states and 35135 transitions. [2021-11-07 00:53:36,604 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) [2021-11-07 00:53:36,605 INFO L276 IsEmpty]: Start isEmpty. Operand 19468 states and 35135 transitions. [2021-11-07 00:53:36,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 00:53:36,617 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:53:36,617 INFO L513 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] [2021-11-07 00:53:36,636 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-07 00:53:36,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:53:36,833 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:53:36,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:53:36,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1626900989, now seen corresponding path program 1 times [2021-11-07 00:53:36,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:53:36,834 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1349388289] [2021-11-07 00:53:36,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:53:36,834 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:53:36,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:53:36,835 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:53:36,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 00:53:37,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:53:37,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 00:53:37,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:53:37,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:53:37,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:53:38,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:53:38,094 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:53:38,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1349388289] [2021-11-07 00:53:38,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1349388289] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:53:38,094 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:53:38,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 00:53:38,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080819510] [2021-11-07 00:53:38,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 00:53:38,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:53:38,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 00:53:38,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:53:38,097 INFO L87 Difference]: Start difference. First operand 19468 states and 35135 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 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) [2021-11-07 00:53:39,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:53:39,763 INFO L93 Difference]: Finished difference Result 57832 states and 104414 transitions. [2021-11-07 00:53:39,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 00:53:39,763 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 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 74 [2021-11-07 00:53:39,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:53:39,868 INFO L225 Difference]: With dead ends: 57832 [2021-11-07 00:53:39,868 INFO L226 Difference]: Without dead ends: 38551 [2021-11-07 00:53:39,900 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:53:39,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38551 states. [2021-11-07 00:53:42,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38551 to 38350. [2021-11-07 00:53:42,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38350 states, 38348 states have (on average 1.802440805257119) internal successors, (69120), 38349 states have internal predecessors, (69120), 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) [2021-11-07 00:53:42,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38350 states to 38350 states and 69120 transitions. [2021-11-07 00:53:42,335 INFO L78 Accepts]: Start accepts. Automaton has 38350 states and 69120 transitions. Word has length 74 [2021-11-07 00:53:42,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:53:42,335 INFO L470 AbstractCegarLoop]: Abstraction has 38350 states and 69120 transitions. [2021-11-07 00:53:42,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 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) [2021-11-07 00:53:42,335 INFO L276 IsEmpty]: Start isEmpty. Operand 38350 states and 69120 transitions. [2021-11-07 00:53:42,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 00:53:42,348 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:53:42,348 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:53:42,377 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-07 00:53:42,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:53:42,566 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:53:42,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:53:42,566 INFO L85 PathProgramCache]: Analyzing trace with hash 891901162, now seen corresponding path program 1 times [2021-11-07 00:53:42,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:53:42,567 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [711754516] [2021-11-07 00:53:42,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:53:42,567 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:53:42,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:53:42,568 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:53:42,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 00:53:43,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:53:43,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 00:53:43,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:53:43,450 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 00:53:43,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:53:43,721 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 00:53:43,721 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:53:43,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [711754516] [2021-11-07 00:53:43,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [711754516] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:53:43,721 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:53:43,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 00:53:43,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69900223] [2021-11-07 00:53:43,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 00:53:43,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:53:43,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 00:53:43,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 00:53:43,723 INFO L87 Difference]: Start difference. First operand 38350 states and 69120 transitions. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 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) [2021-11-07 00:53:50,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:53:50,469 INFO L93 Difference]: Finished difference Result 148797 states and 268027 transitions. [2021-11-07 00:53:50,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 00:53:50,469 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-07 00:53:50,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:53:50,759 INFO L225 Difference]: With dead ends: 148797 [2021-11-07 00:53:50,760 INFO L226 Difference]: Without dead ends: 110700 [2021-11-07 00:53:50,986 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-07 00:53:51,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110700 states. [2021-11-07 00:53:53,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110700 to 38092. [2021-11-07 00:53:53,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38092 states, 38090 states have (on average 1.7875557889209766) internal successors, (68088), 38091 states have internal predecessors, (68088), 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) [2021-11-07 00:53:53,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38092 states to 38092 states and 68088 transitions. [2021-11-07 00:53:53,929 INFO L78 Accepts]: Start accepts. Automaton has 38092 states and 68088 transitions. Word has length 75 [2021-11-07 00:53:53,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:53:53,930 INFO L470 AbstractCegarLoop]: Abstraction has 38092 states and 68088 transitions. [2021-11-07 00:53:53,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 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) [2021-11-07 00:53:53,930 INFO L276 IsEmpty]: Start isEmpty. Operand 38092 states and 68088 transitions. [2021-11-07 00:53:53,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 00:53:53,945 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:53:53,946 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:53:53,963 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-11-07 00:53:54,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:53:54,164 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:53:54,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:53:54,164 INFO L85 PathProgramCache]: Analyzing trace with hash 936290952, now seen corresponding path program 1 times [2021-11-07 00:53:54,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:53:54,165 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1017948496] [2021-11-07 00:53:54,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:53:54,165 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:53:54,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:53:54,166 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:53:54,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 00:53:54,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:53:54,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 00:53:54,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:53:55,065 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:53:55,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:53:55,266 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:53:55,266 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:53:55,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1017948496] [2021-11-07 00:53:55,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1017948496] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:53:55,266 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:53:55,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 00:53:55,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773516596] [2021-11-07 00:53:55,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 00:53:55,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:53:55,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 00:53:55,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 00:53:55,269 INFO L87 Difference]: Start difference. First operand 38092 states and 68088 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 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) [2021-11-07 00:53:57,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:53:57,009 INFO L93 Difference]: Finished difference Result 76126 states and 136082 transitions. [2021-11-07 00:53:57,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 00:53:57,009 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-07 00:53:57,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:53:57,069 INFO L225 Difference]: With dead ends: 76126 [2021-11-07 00:53:57,069 INFO L226 Difference]: Without dead ends: 38293 [2021-11-07 00:53:57,094 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 00:53:57,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38293 states. [2021-11-07 00:53:59,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38293 to 38092. [2021-11-07 00:53:59,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38092 states, 38090 states have (on average 1.7841953268574429) internal successors, (67960), 38091 states have internal predecessors, (67960), 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) [2021-11-07 00:53:59,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38092 states to 38092 states and 67960 transitions. [2021-11-07 00:53:59,136 INFO L78 Accepts]: Start accepts. Automaton has 38092 states and 67960 transitions. Word has length 75 [2021-11-07 00:53:59,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:53:59,137 INFO L470 AbstractCegarLoop]: Abstraction has 38092 states and 67960 transitions. [2021-11-07 00:53:59,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 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) [2021-11-07 00:53:59,137 INFO L276 IsEmpty]: Start isEmpty. Operand 38092 states and 67960 transitions. [2021-11-07 00:53:59,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 00:53:59,143 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:53:59,144 INFO L513 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] [2021-11-07 00:53:59,158 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 00:53:59,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:53:59,352 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:53:59,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:53:59,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1018404149, now seen corresponding path program 1 times [2021-11-07 00:53:59,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:53:59,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [205120610] [2021-11-07 00:53:59,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:53:59,353 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:53:59,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:53:59,354 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:53:59,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 00:54:00,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:54:00,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 00:54:00,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:54:00,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:54:00,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:54:00,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:54:00,446 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:54:00,446 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [205120610] [2021-11-07 00:54:00,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [205120610] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:54:00,447 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:54:00,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 00:54:00,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027321358] [2021-11-07 00:54:00,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 00:54:00,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:54:00,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 00:54:00,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:54:00,448 INFO L87 Difference]: Start difference. First operand 38092 states and 67960 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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) [2021-11-07 00:54:03,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:54:03,693 INFO L93 Difference]: Finished difference Result 105864 states and 188508 transitions. [2021-11-07 00:54:03,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 00:54:03,693 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-07 00:54:03,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:54:03,815 INFO L225 Difference]: With dead ends: 105864 [2021-11-07 00:54:03,815 INFO L226 Difference]: Without dead ends: 67991 [2021-11-07 00:54:03,840 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:54:03,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67991 states. [2021-11-07 00:54:07,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67991 to 67790. [2021-11-07 00:54:07,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67790 states, 67788 states have (on average 1.774842154953679) internal successors, (120313), 67789 states have internal predecessors, (120313), 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) [2021-11-07 00:54:07,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67790 states to 67790 states and 120313 transitions. [2021-11-07 00:54:07,713 INFO L78 Accepts]: Start accepts. Automaton has 67790 states and 120313 transitions. Word has length 75 [2021-11-07 00:54:07,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:54:07,713 INFO L470 AbstractCegarLoop]: Abstraction has 67790 states and 120313 transitions. [2021-11-07 00:54:07,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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) [2021-11-07 00:54:07,714 INFO L276 IsEmpty]: Start isEmpty. Operand 67790 states and 120313 transitions. [2021-11-07 00:54:07,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 00:54:07,722 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:54:07,722 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:54:07,749 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-07 00:54:07,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:54:07,937 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:54:07,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:54:07,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1085753266, now seen corresponding path program 1 times [2021-11-07 00:54:07,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:54:07,938 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1607986517] [2021-11-07 00:54:07,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:54:07,938 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:54:07,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:54:07,939 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:54:07,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 00:54:08,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:54:08,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 00:54:08,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:54:09,055 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:54:09,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:54:09,253 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:54:09,253 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:54:09,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1607986517] [2021-11-07 00:54:09,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1607986517] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 00:54:09,254 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2082514820] [2021-11-07 00:54:09,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:54:09,254 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 00:54:09,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 00:54:09,266 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 00:54:09,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d71e98-3da6-4387-97b6-45816773fb77/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-07 00:54:10,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:54:10,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 00:54:10,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:54:10,508 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 00:54:10,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:54:10,806 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 00:54:10,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2082514820] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:54:10,806 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 00:54:10,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [5, 5] total 16 [2021-11-07 00:54:10,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107441060] [2021-11-07 00:54:10,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 00:54:10,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:54:10,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 00:54:10,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-11-07 00:54:10,808 INFO L87 Difference]: Start difference. First operand 67790 states and 120313 transitions. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 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)