./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product28.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product28.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs --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 bff47839034fd9cbb920af5a298a9e1741d5a9c8d5dbee3233345fdc3046fb27 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:00:29,253 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:00:29,257 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:00:29,315 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:00:29,316 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:00:29,320 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:00:29,322 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:00:29,326 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:00:29,329 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:00:29,335 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:00:29,336 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:00:29,338 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:00:29,338 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:00:29,341 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:00:29,343 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:00:29,347 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:00:29,349 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:00:29,350 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:00:29,353 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:00:29,362 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:00:29,364 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:00:29,367 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:00:29,369 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:00:29,370 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:00:29,374 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:00:29,374 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:00:29,375 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:00:29,376 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:00:29,377 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:00:29,378 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:00:29,378 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:00:29,379 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:00:29,380 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:00:29,381 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:00:29,382 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:00:29,383 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:00:29,384 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:00:29,384 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:00:29,384 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:00:29,385 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:00:29,386 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:00:29,387 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 14:00:29,410 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:00:29,410 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:00:29,411 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:00:29,411 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:00:29,412 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:00:29,412 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:00:29,412 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:00:29,412 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 14:00:29,413 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:00:29,413 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:00:29,413 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 14:00:29,413 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 14:00:29,413 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:00:29,414 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 14:00:29,414 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 14:00:29,414 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 14:00:29,415 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:00:29,415 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:00:29,415 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 14:00:29,416 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:00:29,416 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:00:29,416 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:00:29,416 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:00:29,417 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:00:29,417 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:00:29,417 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:00:29,417 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:00:29,417 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:00:29,418 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:00:29,418 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:00:29,418 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:00:29,418 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:00:29,419 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:00:29,419 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:00:29,419 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:00:29,419 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 14:00:29,420 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 14:00:29,420 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:00:29,420 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:00:29,420 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:00:29,420 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_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bff47839034fd9cbb920af5a298a9e1741d5a9c8d5dbee3233345fdc3046fb27 [2021-11-19 14:00:29,674 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:00:29,718 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:00:29,722 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:00:29,723 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:00:29,724 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:00:29,726 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/product-lines/elevator_spec1_product28.cil.c [2021-11-19 14:00:29,810 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/data/56d954005/16c0dbe2a6ce456da24e817353f1692c/FLAG5ffbf8502 [2021-11-19 14:00:30,536 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:00:30,537 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/sv-benchmarks/c/product-lines/elevator_spec1_product28.cil.c [2021-11-19 14:00:30,561 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/data/56d954005/16c0dbe2a6ce456da24e817353f1692c/FLAG5ffbf8502 [2021-11-19 14:00:30,717 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/data/56d954005/16c0dbe2a6ce456da24e817353f1692c [2021-11-19 14:00:30,722 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:00:30,724 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:00:30,728 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:00:30,729 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:00:30,732 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:00:30,734 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:00:30" (1/1) ... [2021-11-19 14:00:30,736 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e82cfe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:00:30, skipping insertion in model container [2021-11-19 14:00:30,737 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:00:30" (1/1) ... [2021-11-19 14:00:30,752 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:00:30,856 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:00:31,504 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/sv-benchmarks/c/product-lines/elevator_spec1_product28.cil.c[63597,63610] [2021-11-19 14:00:31,553 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:00:31,572 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) [2021-11-19 14:00:31,573 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4ab6e085 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:00:31, skipping insertion in model container [2021-11-19 14:00:31,573 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:00:31,574 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 14:00:31,577 INFO L158 Benchmark]: Toolchain (without parser) took 850.80ms. Allocated memory is still 88.1MB. Free memory was 65.4MB in the beginning and 48.7MB in the end (delta: 16.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-19 14:00:31,579 INFO L158 Benchmark]: CDTParser took 0.35ms. Allocated memory is still 88.1MB. Free memory was 64.3MB in the beginning and 64.3MB in the end (delta: 77.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 14:00:31,581 INFO L158 Benchmark]: CACSL2BoogieTranslator took 845.44ms. Allocated memory is still 88.1MB. Free memory was 65.1MB in the beginning and 48.7MB in the end (delta: 16.5MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-19 14:00:31,584 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35ms. Allocated memory is still 88.1MB. Free memory was 64.3MB in the beginning and 64.3MB in the end (delta: 77.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 845.44ms. Allocated memory is still 88.1MB. Free memory was 65.1MB in the beginning and 48.7MB in the end (delta: 16.5MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 3159]: 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_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product28.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs --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 bff47839034fd9cbb920af5a298a9e1741d5a9c8d5dbee3233345fdc3046fb27 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:00:34,243 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:00:34,248 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:00:34,312 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:00:34,312 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:00:34,318 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:00:34,320 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:00:34,326 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:00:34,330 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:00:34,342 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:00:34,343 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:00:34,345 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:00:34,345 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:00:34,347 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:00:34,349 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:00:34,351 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:00:34,352 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:00:34,353 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:00:34,355 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:00:34,358 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:00:34,361 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:00:34,362 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:00:34,364 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:00:34,365 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:00:34,370 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:00:34,371 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:00:34,392 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:00:34,394 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:00:34,395 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:00:34,396 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:00:34,396 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:00:34,398 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:00:34,399 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:00:34,400 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:00:34,401 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:00:34,402 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:00:34,403 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:00:34,403 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:00:34,404 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:00:34,405 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:00:34,409 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:00:34,410 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-19 14:00:34,460 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:00:34,460 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:00:34,461 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:00:34,462 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:00:34,462 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:00:34,462 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:00:34,462 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:00:34,463 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:00:34,463 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:00:34,463 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:00:34,464 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:00:34,465 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:00:34,465 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:00:34,465 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:00:34,466 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:00:34,466 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:00:34,466 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:00:34,467 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:00:34,467 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 14:00:34,467 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 14:00:34,467 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:00:34,468 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:00:34,468 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:00:34,468 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:00:34,469 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:00:34,469 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 14:00:34,469 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:00:34,470 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:00:34,470 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:00:34,471 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:00:34,471 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:00:34,471 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 14:00:34,471 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 14:00:34,472 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:00:34,472 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:00:34,472 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:00:34,473 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_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bff47839034fd9cbb920af5a298a9e1741d5a9c8d5dbee3233345fdc3046fb27 [2021-11-19 14:00:34,946 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:00:34,975 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:00:34,980 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:00:34,982 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:00:34,983 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:00:34,984 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/product-lines/elevator_spec1_product28.cil.c [2021-11-19 14:00:35,081 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/data/d60961de6/5dbf0d390d814472b7012997631abde0/FLAG58a120428 [2021-11-19 14:00:35,996 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:00:35,997 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/sv-benchmarks/c/product-lines/elevator_spec1_product28.cil.c [2021-11-19 14:00:36,027 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/data/d60961de6/5dbf0d390d814472b7012997631abde0/FLAG58a120428 [2021-11-19 14:00:36,102 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/data/d60961de6/5dbf0d390d814472b7012997631abde0 [2021-11-19 14:00:36,104 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:00:36,105 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:00:36,107 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:00:36,107 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:00:36,111 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:00:36,112 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:00:36" (1/1) ... [2021-11-19 14:00:36,114 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45d1d6dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:00:36, skipping insertion in model container [2021-11-19 14:00:36,114 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:00:36" (1/1) ... [2021-11-19 14:00:36,124 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:00:36,217 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:00:36,888 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/sv-benchmarks/c/product-lines/elevator_spec1_product28.cil.c[63597,63610] [2021-11-19 14:00:36,988 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:00:37,022 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 14:00:37,057 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:00:37,180 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/sv-benchmarks/c/product-lines/elevator_spec1_product28.cil.c[63597,63610] [2021-11-19 14:00:37,201 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:00:37,214 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 14:00:37,362 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/sv-benchmarks/c/product-lines/elevator_spec1_product28.cil.c[63597,63610] [2021-11-19 14:00:37,375 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:00:37,410 INFO L208 MainTranslator]: Completed translation [2021-11-19 14:00:37,411 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:00:37 WrapperNode [2021-11-19 14:00:37,411 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:00:37,412 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 14:00:37,412 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 14:00:37,412 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 14:00:37,420 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:00:37" (1/1) ... [2021-11-19 14:00:37,479 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:00:37" (1/1) ... [2021-11-19 14:00:37,555 INFO L137 Inliner]: procedures = 99, calls = 349, calls flagged for inlining = 28, calls inlined = 24, statements flattened = 1105 [2021-11-19 14:00:37,555 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 14:00:37,556 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 14:00:37,556 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 14:00:37,557 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 14:00:37,567 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:00:37" (1/1) ... [2021-11-19 14:00:37,569 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:00:37" (1/1) ... [2021-11-19 14:00:37,580 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:00:37" (1/1) ... [2021-11-19 14:00:37,587 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:00:37" (1/1) ... [2021-11-19 14:00:37,647 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:00:37" (1/1) ... [2021-11-19 14:00:37,687 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:00:37" (1/1) ... [2021-11-19 14:00:37,699 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:00:37" (1/1) ... [2021-11-19 14:00:37,711 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 14:00:37,712 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 14:00:37,712 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 14:00:37,712 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 14:00:37,713 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:00:37" (1/1) ... [2021-11-19 14:00:37,721 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:00:37,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:00:37,750 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 14:00:37,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 14:00:37,852 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-19 14:00:37,853 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-19 14:00:37,853 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-19 14:00:37,853 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-19 14:00:37,853 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-19 14:00:37,853 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-19 14:00:37,853 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-19 14:00:37,854 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-19 14:00:37,854 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-19 14:00:37,854 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-19 14:00:37,854 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-19 14:00:37,854 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-19 14:00:37,854 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-19 14:00:37,855 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-19 14:00:37,855 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-19 14:00:37,855 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-19 14:00:37,855 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-19 14:00:37,855 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-19 14:00:37,855 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2021-11-19 14:00:37,856 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2021-11-19 14:00:37,856 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 14:00:37,856 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-19 14:00:37,856 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-19 14:00:37,856 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2021-11-19 14:00:37,856 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2021-11-19 14:00:37,857 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-19 14:00:37,857 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-19 14:00:37,857 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-19 14:00:37,857 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-19 14:00:37,858 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2021-11-19 14:00:37,858 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2021-11-19 14:00:37,858 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-19 14:00:37,858 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-19 14:00:37,859 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-19 14:00:37,859 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-19 14:00:37,859 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 14:00:37,859 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-19 14:00:37,859 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-19 14:00:37,859 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2021-11-19 14:00:37,860 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2021-11-19 14:00:37,860 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-19 14:00:37,860 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-19 14:00:37,860 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-19 14:00:37,860 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-19 14:00:37,861 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-19 14:00:37,861 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-19 14:00:37,861 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-19 14:00:37,861 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-19 14:00:37,862 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-19 14:00:37,863 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-19 14:00:37,864 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 14:00:37,865 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 14:00:37,865 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-19 14:00:37,865 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-19 14:00:37,865 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2021-11-19 14:00:37,866 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2021-11-19 14:00:38,160 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 14:00:38,162 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 14:00:39,523 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 14:00:39,540 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 14:00:39,540 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-19 14:00:39,544 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:00:39 BoogieIcfgContainer [2021-11-19 14:00:39,544 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 14:00:39,547 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 14:00:39,547 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 14:00:39,551 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 14:00:39,551 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 02:00:36" (1/3) ... [2021-11-19 14:00:39,552 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79b41fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:00:39, skipping insertion in model container [2021-11-19 14:00:39,552 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:00:37" (2/3) ... [2021-11-19 14:00:39,553 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79b41fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:00:39, skipping insertion in model container [2021-11-19 14:00:39,553 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:00:39" (3/3) ... [2021-11-19 14:00:39,555 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product28.cil.c [2021-11-19 14:00:39,561 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 14:00:39,561 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 14:00:39,627 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 14:00:39,636 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 [2021-11-19 14:00:39,637 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 14:00:39,678 INFO L276 IsEmpty]: Start isEmpty. Operand has 585 states, 455 states have (on average 1.6835164835164835) internal successors, (766), 478 states have internal predecessors, (766), 102 states have call successors, (102), 26 states have call predecessors, (102), 26 states have return successors, (102), 95 states have call predecessors, (102), 102 states have call successors, (102) [2021-11-19 14:00:39,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-19 14:00:39,698 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:00:39,699 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:00:39,700 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:00:39,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:00:39,707 INFO L85 PathProgramCache]: Analyzing trace with hash -512349069, now seen corresponding path program 1 times [2021-11-19 14:00:39,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:00:39,723 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1572990146] [2021-11-19 14:00:39,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:00:39,724 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:00:39,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:00:39,726 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:00:39,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 14:00:40,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:00:40,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 889 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-19 14:00:40,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:00:40,579 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-19 14:00:40,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:00:40,838 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-19 14:00:40,839 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:00:40,839 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1572990146] [2021-11-19 14:00:40,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1572990146] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:00:40,840 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:00:40,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-19 14:00:40,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989708336] [2021-11-19 14:00:40,843 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:00:40,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-19 14:00:40,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:00:40,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-19 14:00:40,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 14:00:40,885 INFO L87 Difference]: Start difference. First operand has 585 states, 455 states have (on average 1.6835164835164835) internal successors, (766), 478 states have internal predecessors, (766), 102 states have call successors, (102), 26 states have call predecessors, (102), 26 states have return successors, (102), 95 states have call predecessors, (102), 102 states have call successors, (102) Second operand has 2 states, 2 states have (on average 25.0) internal successors, (50), 2 states have internal predecessors, (50), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-19 14:00:41,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:00:41,008 INFO L93 Difference]: Finished difference Result 606 states and 1000 transitions. [2021-11-19 14:00:41,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 14:00:41,011 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 25.0) internal successors, (50), 2 states have internal predecessors, (50), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) Word has length 83 [2021-11-19 14:00:41,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:00:41,044 INFO L225 Difference]: With dead ends: 606 [2021-11-19 14:00:41,044 INFO L226 Difference]: Without dead ends: 577 [2021-11-19 14:00:41,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 14:00:41,064 INFO L933 BasicCegarLoop]: 961 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 961 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:00:41,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 961 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:00:41,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-11-19 14:00:41,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 577. [2021-11-19 14:00:41,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 449 states have (on average 1.6815144766146994) internal successors, (755), 470 states have internal predecessors, (755), 102 states have call successors, (102), 26 states have call predecessors, (102), 25 states have return successors, (97), 94 states have call predecessors, (97), 97 states have call successors, (97) [2021-11-19 14:00:41,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 954 transitions. [2021-11-19 14:00:41,240 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 954 transitions. Word has length 83 [2021-11-19 14:00:41,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:00:41,244 INFO L470 AbstractCegarLoop]: Abstraction has 577 states and 954 transitions. [2021-11-19 14:00:41,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 25.0) internal successors, (50), 2 states have internal predecessors, (50), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-19 14:00:41,245 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 954 transitions. [2021-11-19 14:00:41,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-19 14:00:41,263 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:00:41,264 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:00:41,291 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-19 14:00:41,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:00:41,480 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:00:41,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:00:41,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1351265145, now seen corresponding path program 1 times [2021-11-19 14:00:41,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:00:41,483 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1384544748] [2021-11-19 14:00:41,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:00:41,483 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:00:41,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:00:41,485 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:00:41,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 14:00:42,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:00:42,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 891 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:00:42,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:00:42,341 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 14:00:42,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:00:42,645 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:00:42,645 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:00:42,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1384544748] [2021-11-19 14:00:42,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1384544748] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:00:42,646 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:00:42,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:00:42,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557254179] [2021-11-19 14:00:42,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:00:42,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:00:42,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:00:42,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:00:42,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:00:42,658 INFO L87 Difference]: Start difference. First operand 577 states and 954 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-19 14:00:42,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:00:42,822 INFO L93 Difference]: Finished difference Result 1145 states and 1900 transitions. [2021-11-19 14:00:42,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:00:42,823 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), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) Word has length 85 [2021-11-19 14:00:42,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:00:42,832 INFO L225 Difference]: With dead ends: 1145 [2021-11-19 14:00:42,833 INFO L226 Difference]: Without dead ends: 577 [2021-11-19 14:00:42,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:00:42,842 INFO L933 BasicCegarLoop]: 940 mSDtfsCounter, 14 mSDsluCounter, 1873 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 2813 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:00:42,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 2813 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:00:42,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-11-19 14:00:42,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 577. [2021-11-19 14:00:42,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 449 states have (on average 1.6792873051224944) internal successors, (754), 470 states have internal predecessors, (754), 102 states have call successors, (102), 26 states have call predecessors, (102), 25 states have return successors, (97), 94 states have call predecessors, (97), 97 states have call successors, (97) [2021-11-19 14:00:42,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 953 transitions. [2021-11-19 14:00:42,887 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 953 transitions. Word has length 85 [2021-11-19 14:00:42,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:00:42,888 INFO L470 AbstractCegarLoop]: Abstraction has 577 states and 953 transitions. [2021-11-19 14:00:42,888 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), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-19 14:00:42,889 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 953 transitions. [2021-11-19 14:00:42,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-19 14:00:42,892 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:00:42,892 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:00:42,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 14:00:43,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:00:43,108 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:00:43,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:00:43,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1160595213, now seen corresponding path program 1 times [2021-11-19 14:00:43,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:00:43,110 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [876359450] [2021-11-19 14:00:43,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:00:43,110 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:00:43,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:00:43,111 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:00:43,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 14:00:43,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:00:43,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 893 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:00:43,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:00:43,860 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 14:00:43,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:00:44,112 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:00:44,113 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:00:44,113 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [876359450] [2021-11-19 14:00:44,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [876359450] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:00:44,116 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:00:44,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:00:44,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682433905] [2021-11-19 14:00:44,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:00:44,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:00:44,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:00:44,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:00:44,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:00:44,120 INFO L87 Difference]: Start difference. First operand 577 states and 953 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-19 14:00:44,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:00:44,225 INFO L93 Difference]: Finished difference Result 1145 states and 1898 transitions. [2021-11-19 14:00:44,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:00:44,229 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) Word has length 87 [2021-11-19 14:00:44,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:00:44,236 INFO L225 Difference]: With dead ends: 1145 [2021-11-19 14:00:44,237 INFO L226 Difference]: Without dead ends: 577 [2021-11-19 14:00:44,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:00:44,246 INFO L933 BasicCegarLoop]: 940 mSDtfsCounter, 12 mSDsluCounter, 1873 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 2813 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:00:44,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 2813 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:00:44,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-11-19 14:00:44,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 577. [2021-11-19 14:00:44,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 449 states have (on average 1.6770601336302895) internal successors, (753), 470 states have internal predecessors, (753), 102 states have call successors, (102), 26 states have call predecessors, (102), 25 states have return successors, (97), 94 states have call predecessors, (97), 97 states have call successors, (97) [2021-11-19 14:00:44,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 952 transitions. [2021-11-19 14:00:44,296 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 952 transitions. Word has length 87 [2021-11-19 14:00:44,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:00:44,297 INFO L470 AbstractCegarLoop]: Abstraction has 577 states and 952 transitions. [2021-11-19 14:00:44,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-19 14:00:44,297 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 952 transitions. [2021-11-19 14:00:44,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-19 14:00:44,300 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:00:44,301 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:00:44,333 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 14:00:44,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:00:44,514 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:00:44,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:00:44,516 INFO L85 PathProgramCache]: Analyzing trace with hash 301700615, now seen corresponding path program 1 times [2021-11-19 14:00:44,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:00:44,518 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1032150292] [2021-11-19 14:00:44,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:00:44,518 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:00:44,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:00:44,519 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:00:44,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 14:00:44,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:00:45,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 895 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:00:45,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:00:45,228 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 14:00:45,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:00:45,485 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:00:45,485 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:00:45,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1032150292] [2021-11-19 14:00:45,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1032150292] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:00:45,486 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:00:45,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:00:45,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926552932] [2021-11-19 14:00:45,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:00:45,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:00:45,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:00:45,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:00:45,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:00:45,489 INFO L87 Difference]: Start difference. First operand 577 states and 952 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-19 14:00:45,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:00:45,598 INFO L93 Difference]: Finished difference Result 1149 states and 1901 transitions. [2021-11-19 14:00:45,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:00:45,599 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) Word has length 89 [2021-11-19 14:00:45,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:00:45,606 INFO L225 Difference]: With dead ends: 1149 [2021-11-19 14:00:45,606 INFO L226 Difference]: Without dead ends: 583 [2021-11-19 14:00:45,610 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:00:45,612 INFO L933 BasicCegarLoop]: 940 mSDtfsCounter, 13 mSDsluCounter, 1873 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 2813 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:00:45,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 2813 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:00:45,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2021-11-19 14:00:45,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 583. [2021-11-19 14:00:45,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 454 states have (on average 1.669603524229075) internal successors, (758), 475 states have internal predecessors, (758), 102 states have call successors, (102), 27 states have call predecessors, (102), 26 states have return successors, (97), 94 states have call predecessors, (97), 97 states have call successors, (97) [2021-11-19 14:00:45,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 957 transitions. [2021-11-19 14:00:45,646 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 957 transitions. Word has length 89 [2021-11-19 14:00:45,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:00:45,647 INFO L470 AbstractCegarLoop]: Abstraction has 583 states and 957 transitions. [2021-11-19 14:00:45,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-19 14:00:45,649 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 957 transitions. [2021-11-19 14:00:45,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-19 14:00:45,651 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:00:45,651 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:00:45,677 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 14:00:45,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:00:45,866 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:00:45,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:00:45,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1609654872, now seen corresponding path program 1 times [2021-11-19 14:00:45,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:00:45,868 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1420970879] [2021-11-19 14:00:45,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:00:45,868 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:00:45,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:00:45,870 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:00:45,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 14:00:46,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:00:46,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 896 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:00:46,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:00:46,683 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 14:00:46,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:00:47,041 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:00:47,041 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:00:47,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1420970879] [2021-11-19 14:00:47,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1420970879] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:00:47,043 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:00:47,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:00:47,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502352162] [2021-11-19 14:00:47,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:00:47,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:00:47,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:00:47,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:00:47,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:00:47,048 INFO L87 Difference]: Start difference. First operand 583 states and 957 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-19 14:00:47,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:00:47,146 INFO L93 Difference]: Finished difference Result 1148 states and 1892 transitions. [2021-11-19 14:00:47,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:00:47,147 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) Word has length 90 [2021-11-19 14:00:47,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:00:47,162 INFO L225 Difference]: With dead ends: 1148 [2021-11-19 14:00:47,162 INFO L226 Difference]: Without dead ends: 583 [2021-11-19 14:00:47,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:00:47,172 INFO L933 BasicCegarLoop]: 941 mSDtfsCounter, 8 mSDsluCounter, 1873 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 2814 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:00:47,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 2814 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:00:47,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2021-11-19 14:00:47,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 583. [2021-11-19 14:00:47,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 454 states have (on average 1.6674008810572687) internal successors, (757), 475 states have internal predecessors, (757), 102 states have call successors, (102), 27 states have call predecessors, (102), 26 states have return successors, (97), 94 states have call predecessors, (97), 97 states have call successors, (97) [2021-11-19 14:00:47,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 956 transitions. [2021-11-19 14:00:47,228 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 956 transitions. Word has length 90 [2021-11-19 14:00:47,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:00:47,229 INFO L470 AbstractCegarLoop]: Abstraction has 583 states and 956 transitions. [2021-11-19 14:00:47,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-19 14:00:47,229 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 956 transitions. [2021-11-19 14:00:47,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-19 14:00:47,231 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:00:47,231 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:00:47,258 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 14:00:47,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:00:47,446 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:00:47,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:00:47,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1558891221, now seen corresponding path program 1 times [2021-11-19 14:00:47,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:00:47,448 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1944313171] [2021-11-19 14:00:47,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:00:47,448 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:00:47,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:00:47,451 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:00:47,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 14:00:47,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:00:47,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 897 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:00:47,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:00:48,202 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 14:00:48,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:00:48,527 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:00:48,528 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:00:48,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1944313171] [2021-11-19 14:00:48,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1944313171] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:00:48,528 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:00:48,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:00:48,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461106540] [2021-11-19 14:00:48,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:00:48,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:00:48,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:00:48,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:00:48,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:00:48,531 INFO L87 Difference]: Start difference. First operand 583 states and 956 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-19 14:00:48,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:00:48,602 INFO L93 Difference]: Finished difference Result 1148 states and 1891 transitions. [2021-11-19 14:00:48,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:00:48,603 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) Word has length 91 [2021-11-19 14:00:48,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:00:48,609 INFO L225 Difference]: With dead ends: 1148 [2021-11-19 14:00:48,609 INFO L226 Difference]: Without dead ends: 583 [2021-11-19 14:00:48,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:00:48,614 INFO L933 BasicCegarLoop]: 941 mSDtfsCounter, 6 mSDsluCounter, 1873 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 2814 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:00:48,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 2814 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:00:48,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2021-11-19 14:00:48,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 583. [2021-11-19 14:00:48,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 454 states have (on average 1.6651982378854626) internal successors, (756), 475 states have internal predecessors, (756), 102 states have call successors, (102), 27 states have call predecessors, (102), 26 states have return successors, (97), 94 states have call predecessors, (97), 97 states have call successors, (97) [2021-11-19 14:00:48,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 955 transitions. [2021-11-19 14:00:48,645 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 955 transitions. Word has length 91 [2021-11-19 14:00:48,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:00:48,646 INFO L470 AbstractCegarLoop]: Abstraction has 583 states and 955 transitions. [2021-11-19 14:00:48,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-19 14:00:48,646 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 955 transitions. [2021-11-19 14:00:48,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-19 14:00:48,648 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:00:48,648 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:00:48,676 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 14:00:48,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:00:48,862 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:00:48,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:00:48,863 INFO L85 PathProgramCache]: Analyzing trace with hash -811976436, now seen corresponding path program 1 times [2021-11-19 14:00:48,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:00:48,863 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1173646217] [2021-11-19 14:00:48,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:00:48,864 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:00:48,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:00:48,865 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:00:48,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 14:00:49,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:00:49,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 898 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:00:49,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:00:49,583 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:00:49,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:00:49,987 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:00:49,987 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:00:49,988 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1173646217] [2021-11-19 14:00:49,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1173646217] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:00:49,988 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:00:49,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-19 14:00:49,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225556466] [2021-11-19 14:00:49,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:00:49,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:00:49,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:00:49,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:00:49,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:00:49,990 INFO L87 Difference]: Start difference. First operand 583 states and 955 transitions. Second operand has 7 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-19 14:00:50,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:00:50,235 INFO L93 Difference]: Finished difference Result 1165 states and 1919 transitions. [2021-11-19 14:00:50,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:00:50,237 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 92 [2021-11-19 14:00:50,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:00:50,245 INFO L225 Difference]: With dead ends: 1165 [2021-11-19 14:00:50,245 INFO L226 Difference]: Without dead ends: 604 [2021-11-19 14:00:50,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:00:50,251 INFO L933 BasicCegarLoop]: 939 mSDtfsCounter, 148 mSDsluCounter, 4588 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 5527 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:00:50,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 5527 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:00:50,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2021-11-19 14:00:50,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 602. [2021-11-19 14:00:50,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 602 states, 470 states have (on average 1.6638297872340426) internal successors, (782), 493 states have internal predecessors, (782), 103 states have call successors, (103), 27 states have call predecessors, (103), 28 states have return successors, (101), 95 states have call predecessors, (101), 98 states have call successors, (101) [2021-11-19 14:00:50,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 986 transitions. [2021-11-19 14:00:50,289 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 986 transitions. Word has length 92 [2021-11-19 14:00:50,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:00:50,290 INFO L470 AbstractCegarLoop]: Abstraction has 602 states and 986 transitions. [2021-11-19 14:00:50,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-19 14:00:50,290 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 986 transitions. [2021-11-19 14:00:50,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-19 14:00:50,293 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:00:50,293 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:00:50,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-19 14:00:50,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:00:50,523 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:00:50,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:00:50,524 INFO L85 PathProgramCache]: Analyzing trace with hash 55075789, now seen corresponding path program 1 times [2021-11-19 14:00:50,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:00:50,525 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [571661547] [2021-11-19 14:00:50,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:00:50,525 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:00:50,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:00:50,526 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:00:50,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 14:00:50,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:00:51,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 898 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:00:51,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:00:51,249 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 14:00:51,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:00:51,554 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:00:51,554 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:00:51,554 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [571661547] [2021-11-19 14:00:51,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [571661547] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:00:51,555 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:00:51,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2021-11-19 14:00:51,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624937169] [2021-11-19 14:00:51,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:00:51,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:00:51,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:00:51,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:00:51,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:00:51,557 INFO L87 Difference]: Start difference. First operand 602 states and 986 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-19 14:00:51,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:00:51,639 INFO L93 Difference]: Finished difference Result 1178 states and 1941 transitions. [2021-11-19 14:00:51,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:00:51,640 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) Word has length 92 [2021-11-19 14:00:51,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:00:51,647 INFO L225 Difference]: With dead ends: 1178 [2021-11-19 14:00:51,647 INFO L226 Difference]: Without dead ends: 598 [2021-11-19 14:00:51,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:00:51,652 INFO L933 BasicCegarLoop]: 940 mSDtfsCounter, 8 mSDsluCounter, 1873 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 2813 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:00:51,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 2813 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:00:51,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2021-11-19 14:00:51,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 598. [2021-11-19 14:00:51,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598 states, 468 states have (on average 1.6645299145299146) internal successors, (779), 490 states have internal predecessors, (779), 102 states have call successors, (102), 27 states have call predecessors, (102), 27 states have return successors, (98), 94 states have call predecessors, (98), 97 states have call successors, (98) [2021-11-19 14:00:51,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 979 transitions. [2021-11-19 14:00:51,684 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 979 transitions. Word has length 92 [2021-11-19 14:00:51,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:00:51,685 INFO L470 AbstractCegarLoop]: Abstraction has 598 states and 979 transitions. [2021-11-19 14:00:51,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-19 14:00:51,685 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 979 transitions. [2021-11-19 14:00:51,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-19 14:00:51,687 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:00:51,688 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:00:51,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-19 14:00:51,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:00:51,910 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:00:51,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:00:51,910 INFO L85 PathProgramCache]: Analyzing trace with hash 240761748, now seen corresponding path program 1 times [2021-11-19 14:00:51,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:00:51,911 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [517911975] [2021-11-19 14:00:51,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:00:51,911 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:00:51,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:00:51,912 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:00:51,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 14:00:52,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:00:52,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 899 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:00:52,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:00:52,487 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:00:52,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:00:52,820 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 14:00:52,821 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:00:52,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [517911975] [2021-11-19 14:00:52,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [517911975] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:00:52,821 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:00:52,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:00:52,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080172902] [2021-11-19 14:00:52,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:00:52,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:00:52,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:00:52,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:00:52,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:00:52,824 INFO L87 Difference]: Start difference. First operand 598 states and 979 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-19 14:00:53,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:00:53,010 INFO L93 Difference]: Finished difference Result 1204 states and 1986 transitions. [2021-11-19 14:00:53,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:00:53,012 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 93 [2021-11-19 14:00:53,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:00:53,018 INFO L225 Difference]: With dead ends: 1204 [2021-11-19 14:00:53,018 INFO L226 Difference]: Without dead ends: 598 [2021-11-19 14:00:53,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:00:53,022 INFO L933 BasicCegarLoop]: 887 mSDtfsCounter, 134 mSDsluCounter, 1734 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 2621 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:00:53,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 2621 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:00:53,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2021-11-19 14:00:53,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 598. [2021-11-19 14:00:53,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598 states, 468 states have (on average 1.6538461538461537) internal successors, (774), 490 states have internal predecessors, (774), 102 states have call successors, (102), 27 states have call predecessors, (102), 27 states have return successors, (98), 94 states have call predecessors, (98), 97 states have call successors, (98) [2021-11-19 14:00:53,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 974 transitions. [2021-11-19 14:00:53,048 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 974 transitions. Word has length 93 [2021-11-19 14:00:53,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:00:53,049 INFO L470 AbstractCegarLoop]: Abstraction has 598 states and 974 transitions. [2021-11-19 14:00:53,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-19 14:00:53,049 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 974 transitions. [2021-11-19 14:00:53,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-19 14:00:53,051 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:00:53,052 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:00:53,074 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-19 14:00:53,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:00:53,269 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:00:53,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:00:53,270 INFO L85 PathProgramCache]: Analyzing trace with hash 451885592, now seen corresponding path program 1 times [2021-11-19 14:00:53,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:00:53,271 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [482733161] [2021-11-19 14:00:53,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:00:53,271 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:00:53,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:00:53,273 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:00:53,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-19 14:00:53,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:00:53,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 901 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:00:53,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:00:53,832 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:00:53,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:00:54,152 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 14:00:54,152 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:00:54,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [482733161] [2021-11-19 14:00:54,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [482733161] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:00:54,153 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:00:54,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:00:54,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696437148] [2021-11-19 14:00:54,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:00:54,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:00:54,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:00:54,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:00:54,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:00:54,155 INFO L87 Difference]: Start difference. First operand 598 states and 974 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-19 14:00:54,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:00:54,363 INFO L93 Difference]: Finished difference Result 1204 states and 1976 transitions. [2021-11-19 14:00:54,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:00:54,364 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 95 [2021-11-19 14:00:54,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:00:54,371 INFO L225 Difference]: With dead ends: 1204 [2021-11-19 14:00:54,371 INFO L226 Difference]: Without dead ends: 598 [2021-11-19 14:00:54,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:00:54,376 INFO L933 BasicCegarLoop]: 887 mSDtfsCounter, 128 mSDsluCounter, 1734 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 2621 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:00:54,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 2621 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:00:54,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2021-11-19 14:00:54,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 598. [2021-11-19 14:00:54,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598 states, 468 states have (on average 1.643162393162393) internal successors, (769), 490 states have internal predecessors, (769), 102 states have call successors, (102), 27 states have call predecessors, (102), 27 states have return successors, (98), 94 states have call predecessors, (98), 97 states have call successors, (98) [2021-11-19 14:00:54,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 969 transitions. [2021-11-19 14:00:54,412 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 969 transitions. Word has length 95 [2021-11-19 14:00:54,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:00:54,413 INFO L470 AbstractCegarLoop]: Abstraction has 598 states and 969 transitions. [2021-11-19 14:00:54,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-19 14:00:54,413 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 969 transitions. [2021-11-19 14:00:54,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-19 14:00:54,415 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:00:54,415 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:00:54,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-19 14:00:54,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:00:54,636 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:00:54,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:00:54,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1580397324, now seen corresponding path program 1 times [2021-11-19 14:00:54,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:00:54,637 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [864172102] [2021-11-19 14:00:54,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:00:54,637 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:00:54,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:00:54,638 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:00:54,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 14:00:55,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:00:55,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 903 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:00:55,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:00:55,284 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:00:55,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:00:55,573 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 14:00:55,574 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:00:55,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [864172102] [2021-11-19 14:00:55,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [864172102] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:00:55,574 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:00:55,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:00:55,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807882636] [2021-11-19 14:00:55,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:00:55,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:00:55,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:00:55,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:00:55,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:00:55,576 INFO L87 Difference]: Start difference. First operand 598 states and 969 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-19 14:00:55,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:00:55,780 INFO L93 Difference]: Finished difference Result 1225 states and 1997 transitions. [2021-11-19 14:00:55,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:00:55,782 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 97 [2021-11-19 14:00:55,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:00:55,789 INFO L225 Difference]: With dead ends: 1225 [2021-11-19 14:00:55,789 INFO L226 Difference]: Without dead ends: 628 [2021-11-19 14:00:55,793 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:00:55,794 INFO L933 BasicCegarLoop]: 897 mSDtfsCounter, 143 mSDsluCounter, 1734 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 2631 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:00:55,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 2631 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:00:55,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2021-11-19 14:00:55,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 613. [2021-11-19 14:00:55,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 613 states, 483 states have (on average 1.6231884057971016) internal successors, (784), 504 states have internal predecessors, (784), 102 states have call successors, (102), 28 states have call predecessors, (102), 27 states have return successors, (97), 94 states have call predecessors, (97), 97 states have call successors, (97) [2021-11-19 14:00:55,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 613 states to 613 states and 983 transitions. [2021-11-19 14:00:55,824 INFO L78 Accepts]: Start accepts. Automaton has 613 states and 983 transitions. Word has length 97 [2021-11-19 14:00:55,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:00:55,825 INFO L470 AbstractCegarLoop]: Abstraction has 613 states and 983 transitions. [2021-11-19 14:00:55,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-19 14:00:55,825 INFO L276 IsEmpty]: Start isEmpty. Operand 613 states and 983 transitions. [2021-11-19 14:00:55,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-19 14:00:55,827 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:00:55,828 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:00:55,849 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-19 14:00:56,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:00:56,042 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:00:56,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:00:56,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1704271756, now seen corresponding path program 1 times [2021-11-19 14:00:56,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:00:56,043 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1929885723] [2021-11-19 14:00:56,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:00:56,043 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:00:56,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:00:56,044 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:00:56,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-19 14:00:56,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:00:56,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 902 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:00:56,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:00:56,693 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:00:56,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:00:57,107 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:00:57,108 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:00:57,108 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1929885723] [2021-11-19 14:00:57,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1929885723] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:00:57,108 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:00:57,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 8 [2021-11-19 14:00:57,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429895647] [2021-11-19 14:00:57,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:00:57,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:00:57,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:00:57,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:00:57,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:00:57,113 INFO L87 Difference]: Start difference. First operand 613 states and 983 transitions. Second operand has 7 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-19 14:00:57,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:00:57,301 INFO L93 Difference]: Finished difference Result 1189 states and 1918 transitions. [2021-11-19 14:00:57,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:00:57,303 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 97 [2021-11-19 14:00:57,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:00:57,310 INFO L225 Difference]: With dead ends: 1189 [2021-11-19 14:00:57,310 INFO L226 Difference]: Without dead ends: 607 [2021-11-19 14:00:57,316 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:00:57,317 INFO L933 BasicCegarLoop]: 942 mSDtfsCounter, 131 mSDsluCounter, 4553 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 5495 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:00:57,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 5495 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:00:57,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2021-11-19 14:00:57,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 592. [2021-11-19 14:00:57,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 592 states, 462 states have (on average 1.6168831168831168) internal successors, (747), 483 states have internal predecessors, (747), 102 states have call successors, (102), 28 states have call predecessors, (102), 27 states have return successors, (97), 94 states have call predecessors, (97), 97 states have call successors, (97) [2021-11-19 14:00:57,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 946 transitions. [2021-11-19 14:00:57,349 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 946 transitions. Word has length 97 [2021-11-19 14:00:57,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:00:57,350 INFO L470 AbstractCegarLoop]: Abstraction has 592 states and 946 transitions. [2021-11-19 14:00:57,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-19 14:00:57,351 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 946 transitions. [2021-11-19 14:00:57,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-19 14:00:57,354 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:00:57,356 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:00:57,383 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-19 14:00:57,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:00:57,584 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:00:57,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:00:57,584 INFO L85 PathProgramCache]: Analyzing trace with hash 355644681, now seen corresponding path program 1 times [2021-11-19 14:00:57,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:00:57,584 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1430481604] [2021-11-19 14:00:57,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:00:57,585 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:00:57,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:00:57,585 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:00:57,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-19 14:00:57,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:00:57,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 904 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:00:57,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:00:58,130 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:00:58,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:00:58,455 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 14:00:58,455 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:00:58,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1430481604] [2021-11-19 14:00:58,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1430481604] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:00:58,456 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:00:58,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:00:58,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708356626] [2021-11-19 14:00:58,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:00:58,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:00:58,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:00:58,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:00:58,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:00:58,459 INFO L87 Difference]: Start difference. First operand 592 states and 946 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-19 14:00:58,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:00:58,595 INFO L93 Difference]: Finished difference Result 1153 states and 1856 transitions. [2021-11-19 14:00:58,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:00:58,598 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 98 [2021-11-19 14:00:58,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:00:58,604 INFO L225 Difference]: With dead ends: 1153 [2021-11-19 14:00:58,604 INFO L226 Difference]: Without dead ends: 592 [2021-11-19 14:00:58,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:00:58,609 INFO L933 BasicCegarLoop]: 911 mSDtfsCounter, 69 mSDsluCounter, 1734 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 2645 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:00:58,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 2645 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:00:58,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-11-19 14:00:58,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 592. [2021-11-19 14:00:58,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 592 states, 462 states have (on average 1.6147186147186148) internal successors, (746), 483 states have internal predecessors, (746), 102 states have call successors, (102), 28 states have call predecessors, (102), 27 states have return successors, (97), 94 states have call predecessors, (97), 97 states have call successors, (97) [2021-11-19 14:00:58,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 945 transitions. [2021-11-19 14:00:58,639 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 945 transitions. Word has length 98 [2021-11-19 14:00:58,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:00:58,640 INFO L470 AbstractCegarLoop]: Abstraction has 592 states and 945 transitions. [2021-11-19 14:00:58,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-19 14:00:58,640 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 945 transitions. [2021-11-19 14:00:58,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-19 14:00:58,642 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:00:58,643 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:00:58,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-19 14:00:58,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:00:58,864 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:00:58,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:00:58,865 INFO L85 PathProgramCache]: Analyzing trace with hash 719581871, now seen corresponding path program 1 times [2021-11-19 14:00:58,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:00:58,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [770894812] [2021-11-19 14:00:58,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:00:58,865 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:00:58,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:00:58,866 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:00:58,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-19 14:00:59,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:00:59,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 905 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:00:59,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:00:59,538 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:00:59,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:00:59,824 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 14:00:59,824 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:00:59,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [770894812] [2021-11-19 14:00:59,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [770894812] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:00:59,825 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:00:59,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:00:59,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783319229] [2021-11-19 14:00:59,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:00:59,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:00:59,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:00:59,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:00:59,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:00:59,827 INFO L87 Difference]: Start difference. First operand 592 states and 945 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-19 14:00:59,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:00:59,943 INFO L93 Difference]: Finished difference Result 1153 states and 1855 transitions. [2021-11-19 14:00:59,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:00:59,944 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 99 [2021-11-19 14:00:59,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:00:59,950 INFO L225 Difference]: With dead ends: 1153 [2021-11-19 14:00:59,950 INFO L226 Difference]: Without dead ends: 592 [2021-11-19 14:00:59,954 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:00:59,955 INFO L933 BasicCegarLoop]: 911 mSDtfsCounter, 67 mSDsluCounter, 1734 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 2645 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:00:59,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 2645 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:00:59,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-11-19 14:00:59,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 592. [2021-11-19 14:00:59,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 592 states, 462 states have (on average 1.6125541125541125) internal successors, (745), 483 states have internal predecessors, (745), 102 states have call successors, (102), 28 states have call predecessors, (102), 27 states have return successors, (97), 94 states have call predecessors, (97), 97 states have call successors, (97) [2021-11-19 14:00:59,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 944 transitions. [2021-11-19 14:00:59,983 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 944 transitions. Word has length 99 [2021-11-19 14:00:59,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:00:59,984 INFO L470 AbstractCegarLoop]: Abstraction has 592 states and 944 transitions. [2021-11-19 14:00:59,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-19 14:00:59,984 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 944 transitions. [2021-11-19 14:00:59,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-19 14:00:59,986 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:00:59,987 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:01:00,017 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-19 14:01:00,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:01:00,202 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:01:00,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:01:00,202 INFO L85 PathProgramCache]: Analyzing trace with hash -407089948, now seen corresponding path program 1 times [2021-11-19 14:01:00,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:01:00,203 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1975161935] [2021-11-19 14:01:00,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:01:00,203 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:01:00,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:01:00,205 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:01:00,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-19 14:01:00,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:01:00,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 906 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 14:01:00,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:01:00,824 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:01:00,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:01:01,320 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:01:01,320 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:01:01,320 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1975161935] [2021-11-19 14:01:01,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1975161935] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:01:01,320 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:01:01,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-19 14:01:01,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884211428] [2021-11-19 14:01:01,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:01:01,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:01:01,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:01:01,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:01:01,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:01:01,322 INFO L87 Difference]: Start difference. First operand 592 states and 944 transitions. Second operand has 8 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-19 14:01:01,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:01:01,586 INFO L93 Difference]: Finished difference Result 1158 states and 1862 transitions. [2021-11-19 14:01:01,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:01:01,587 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 100 [2021-11-19 14:01:01,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:01:01,593 INFO L225 Difference]: With dead ends: 1158 [2021-11-19 14:01:01,593 INFO L226 Difference]: Without dead ends: 603 [2021-11-19 14:01:01,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-19 14:01:01,599 INFO L933 BasicCegarLoop]: 886 mSDtfsCounter, 109 mSDsluCounter, 5252 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 6138 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:01:01,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 6138 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:01:01,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2021-11-19 14:01:01,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 594. [2021-11-19 14:01:01,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 594 states, 464 states have (on average 1.6077586206896552) internal successors, (746), 485 states have internal predecessors, (746), 102 states have call successors, (102), 28 states have call predecessors, (102), 27 states have return successors, (97), 94 states have call predecessors, (97), 97 states have call successors, (97) [2021-11-19 14:01:01,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 945 transitions. [2021-11-19 14:01:01,630 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 945 transitions. Word has length 100 [2021-11-19 14:01:01,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:01:01,631 INFO L470 AbstractCegarLoop]: Abstraction has 594 states and 945 transitions. [2021-11-19 14:01:01,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-19 14:01:01,632 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 945 transitions. [2021-11-19 14:01:01,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-19 14:01:01,634 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:01:01,634 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:01:01,664 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-19 14:01:01,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:01:01,859 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:01:01,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:01:01,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1361114522, now seen corresponding path program 1 times [2021-11-19 14:01:01,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:01:01,860 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [536739832] [2021-11-19 14:01:01,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:01:01,861 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:01:01,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:01:01,862 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:01:01,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-19 14:01:02,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:01:02,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 907 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:01:02,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:01:02,463 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:01:02,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:01:02,946 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:01:02,947 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:01:02,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [536739832] [2021-11-19 14:01:02,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [536739832] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:01:02,947 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:01:02,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-19 14:01:02,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587636645] [2021-11-19 14:01:02,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:01:02,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:01:02,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:01:02,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:01:02,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:01:02,949 INFO L87 Difference]: Start difference. First operand 594 states and 945 transitions. Second operand has 8 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-19 14:01:03,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:01:03,273 INFO L93 Difference]: Finished difference Result 1150 states and 1843 transitions. [2021-11-19 14:01:03,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:01:03,275 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 101 [2021-11-19 14:01:03,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:01:03,282 INFO L225 Difference]: With dead ends: 1150 [2021-11-19 14:01:03,282 INFO L226 Difference]: Without dead ends: 599 [2021-11-19 14:01:03,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-19 14:01:03,287 INFO L933 BasicCegarLoop]: 888 mSDtfsCounter, 77 mSDsluCounter, 5258 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 6146 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:01:03,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 6146 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:01:03,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2021-11-19 14:01:03,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 596. [2021-11-19 14:01:03,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 466 states have (on average 1.6030042918454936) internal successors, (747), 487 states have internal predecessors, (747), 102 states have call successors, (102), 28 states have call predecessors, (102), 27 states have return successors, (97), 94 states have call predecessors, (97), 97 states have call successors, (97) [2021-11-19 14:01:03,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 946 transitions. [2021-11-19 14:01:03,324 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 946 transitions. Word has length 101 [2021-11-19 14:01:03,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:01:03,325 INFO L470 AbstractCegarLoop]: Abstraction has 596 states and 946 transitions. [2021-11-19 14:01:03,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-19 14:01:03,325 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 946 transitions. [2021-11-19 14:01:03,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-19 14:01:03,328 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:01:03,328 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:01:03,354 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-19 14:01:03,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:01:03,542 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:01:03,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:01:03,542 INFO L85 PathProgramCache]: Analyzing trace with hash -939847826, now seen corresponding path program 1 times [2021-11-19 14:01:03,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:01:03,543 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1663022816] [2021-11-19 14:01:03,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:01:03,543 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:01:03,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:01:03,544 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:01:03,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-19 14:01:03,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:01:03,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 908 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:01:03,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:01:04,153 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:01:04,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:01:04,497 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:01:04,497 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:01:04,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1663022816] [2021-11-19 14:01:04,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1663022816] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:01:04,498 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:01:04,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 14:01:04,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164275031] [2021-11-19 14:01:04,498 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:01:04,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 14:01:04,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:01:04,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 14:01:04,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:01:04,500 INFO L87 Difference]: Start difference. First operand 596 states and 946 transitions. Second operand has 11 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-19 14:01:04,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:01:04,765 INFO L93 Difference]: Finished difference Result 1096 states and 1770 transitions. [2021-11-19 14:01:04,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:01:04,767 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 102 [2021-11-19 14:01:04,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:01:04,774 INFO L225 Difference]: With dead ends: 1096 [2021-11-19 14:01:04,774 INFO L226 Difference]: Without dead ends: 589 [2021-11-19 14:01:04,778 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:01:04,779 INFO L933 BasicCegarLoop]: 900 mSDtfsCounter, 55 mSDsluCounter, 7079 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 7979 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:01:04,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 7979 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:01:04,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2021-11-19 14:01:04,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 589. [2021-11-19 14:01:04,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 589 states, 459 states have (on average 1.6100217864923747) internal successors, (739), 480 states have internal predecessors, (739), 102 states have call successors, (102), 28 states have call predecessors, (102), 27 states have return successors, (97), 94 states have call predecessors, (97), 97 states have call successors, (97) [2021-11-19 14:01:04,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 938 transitions. [2021-11-19 14:01:04,807 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 938 transitions. Word has length 102 [2021-11-19 14:01:04,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:01:04,808 INFO L470 AbstractCegarLoop]: Abstraction has 589 states and 938 transitions. [2021-11-19 14:01:04,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-19 14:01:04,808 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 938 transitions. [2021-11-19 14:01:04,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-19 14:01:04,810 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:01:04,810 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:01:04,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-19 14:01:05,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:01:05,034 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:01:05,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:01:05,035 INFO L85 PathProgramCache]: Analyzing trace with hash -519060226, now seen corresponding path program 1 times [2021-11-19 14:01:05,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:01:05,035 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1356802381] [2021-11-19 14:01:05,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:01:05,036 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:01:05,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:01:05,036 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:01:05,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-19 14:01:05,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:01:05,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 909 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:01:05,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:01:05,664 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:01:05,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:01:06,068 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:01:06,069 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:01:06,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1356802381] [2021-11-19 14:01:06,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1356802381] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:01:06,069 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:01:06,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 14:01:06,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705047299] [2021-11-19 14:01:06,072 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:01:06,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 14:01:06,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:01:06,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 14:01:06,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:01:06,074 INFO L87 Difference]: Start difference. First operand 589 states and 938 transitions. Second operand has 11 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-19 14:01:06,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:01:06,231 INFO L93 Difference]: Finished difference Result 1101 states and 1784 transitions. [2021-11-19 14:01:06,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:01:06,233 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 103 [2021-11-19 14:01:06,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:01:06,238 INFO L225 Difference]: With dead ends: 1101 [2021-11-19 14:01:06,238 INFO L226 Difference]: Without dead ends: 586 [2021-11-19 14:01:06,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:01:06,242 INFO L933 BasicCegarLoop]: 892 mSDtfsCounter, 97 mSDsluCounter, 6140 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 7032 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:01:06,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 7032 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:01:06,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2021-11-19 14:01:06,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 586. [2021-11-19 14:01:06,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 456 states have (on average 1.6096491228070176) internal successors, (734), 477 states have internal predecessors, (734), 102 states have call successors, (102), 28 states have call predecessors, (102), 27 states have return successors, (97), 94 states have call predecessors, (97), 97 states have call successors, (97) [2021-11-19 14:01:06,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 933 transitions. [2021-11-19 14:01:06,267 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 933 transitions. Word has length 103 [2021-11-19 14:01:06,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:01:06,267 INFO L470 AbstractCegarLoop]: Abstraction has 586 states and 933 transitions. [2021-11-19 14:01:06,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-19 14:01:06,268 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 933 transitions. [2021-11-19 14:01:06,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-19 14:01:06,269 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:01:06,270 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:01:06,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-19 14:01:06,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:01:06,491 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:01:06,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:01:06,492 INFO L85 PathProgramCache]: Analyzing trace with hash -696843906, now seen corresponding path program 1 times [2021-11-19 14:01:06,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:01:06,492 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [751498856] [2021-11-19 14:01:06,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:01:06,493 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:01:06,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:01:06,494 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:01:06,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-19 14:01:06,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:01:06,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 908 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:01:06,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:01:07,115 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:01:07,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:01:07,425 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:01:07,426 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:01:07,426 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [751498856] [2021-11-19 14:01:07,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [751498856] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:01:07,426 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:01:07,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-19 14:01:07,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247963410] [2021-11-19 14:01:07,426 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:01:07,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:01:07,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:01:07,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:01:07,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:01:07,428 INFO L87 Difference]: Start difference. First operand 586 states and 933 transitions. Second operand has 8 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 3 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-19 14:01:07,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:01:07,570 INFO L93 Difference]: Finished difference Result 1098 states and 1779 transitions. [2021-11-19 14:01:07,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:01:07,572 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 3 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 103 [2021-11-19 14:01:07,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:01:07,577 INFO L225 Difference]: With dead ends: 1098 [2021-11-19 14:01:07,577 INFO L226 Difference]: Without dead ends: 578 [2021-11-19 14:01:07,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:01:07,581 INFO L933 BasicCegarLoop]: 891 mSDtfsCounter, 142 mSDsluCounter, 4392 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 5283 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:01:07,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 5283 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:01:07,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2021-11-19 14:01:07,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 578. [2021-11-19 14:01:07,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 578 states, 448 states have (on average 1.6138392857142858) internal successors, (723), 469 states have internal predecessors, (723), 102 states have call successors, (102), 28 states have call predecessors, (102), 27 states have return successors, (97), 94 states have call predecessors, (97), 97 states have call successors, (97) [2021-11-19 14:01:07,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 922 transitions. [2021-11-19 14:01:07,605 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 922 transitions. Word has length 103 [2021-11-19 14:01:07,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:01:07,606 INFO L470 AbstractCegarLoop]: Abstraction has 578 states and 922 transitions. [2021-11-19 14:01:07,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 3 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-19 14:01:07,606 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 922 transitions. [2021-11-19 14:01:07,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-19 14:01:07,608 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:01:07,608 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:01:07,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-19 14:01:07,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:01:07,822 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:01:07,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:01:07,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1456661614, now seen corresponding path program 1 times [2021-11-19 14:01:07,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:01:07,823 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [557123107] [2021-11-19 14:01:07,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:01:07,823 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:01:07,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:01:07,824 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:01:07,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-19 14:01:08,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:01:08,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 910 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 14:01:08,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:01:08,387 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:01:08,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:01:08,788 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:01:08,788 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:01:08,788 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [557123107] [2021-11-19 14:01:08,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [557123107] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:01:08,788 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:01:08,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 14:01:08,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137012379] [2021-11-19 14:01:08,789 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:01:08,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 14:01:08,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:01:08,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 14:01:08,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:01:08,791 INFO L87 Difference]: Start difference. First operand 578 states and 922 transitions. Second operand has 13 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-19 14:01:08,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:01:08,969 INFO L93 Difference]: Finished difference Result 1084 states and 1757 transitions. [2021-11-19 14:01:08,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:01:08,971 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 104 [2021-11-19 14:01:08,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:01:08,976 INFO L225 Difference]: With dead ends: 1084 [2021-11-19 14:01:08,976 INFO L226 Difference]: Without dead ends: 578 [2021-11-19 14:01:08,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-19 14:01:08,980 INFO L933 BasicCegarLoop]: 887 mSDtfsCounter, 101 mSDsluCounter, 5246 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 6133 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:01:08,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 6133 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:01:08,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2021-11-19 14:01:08,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 578. [2021-11-19 14:01:08,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 578 states, 448 states have (on average 1.6116071428571428) internal successors, (722), 469 states have internal predecessors, (722), 102 states have call successors, (102), 28 states have call predecessors, (102), 27 states have return successors, (97), 94 states have call predecessors, (97), 97 states have call successors, (97) [2021-11-19 14:01:09,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 921 transitions. [2021-11-19 14:01:09,003 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 921 transitions. Word has length 104 [2021-11-19 14:01:09,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:01:09,003 INFO L470 AbstractCegarLoop]: Abstraction has 578 states and 921 transitions. [2021-11-19 14:01:09,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-19 14:01:09,004 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 921 transitions. [2021-11-19 14:01:09,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-19 14:01:09,006 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:01:09,006 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:01:09,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-19 14:01:09,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:01:09,222 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:01:09,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:01:09,222 INFO L85 PathProgramCache]: Analyzing trace with hash -500374532, now seen corresponding path program 1 times [2021-11-19 14:01:09,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:01:09,223 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [473005533] [2021-11-19 14:01:09,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:01:09,223 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:01:09,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:01:09,224 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:01:09,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-19 14:01:09,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:01:09,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 911 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 14:01:09,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:01:09,827 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:01:09,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:01:10,410 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:01:10,410 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:01:10,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [473005533] [2021-11-19 14:01:10,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [473005533] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:01:10,411 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:01:10,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 14:01:10,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214401890] [2021-11-19 14:01:10,412 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:01:10,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 14:01:10,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:01:10,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 14:01:10,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:01:10,415 INFO L87 Difference]: Start difference. First operand 578 states and 921 transitions. Second operand has 13 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-19 14:01:10,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:01:10,676 INFO L93 Difference]: Finished difference Result 1128 states and 1814 transitions. [2021-11-19 14:01:10,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:01:10,678 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 105 [2021-11-19 14:01:10,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:01:10,682 INFO L225 Difference]: With dead ends: 1128 [2021-11-19 14:01:10,682 INFO L226 Difference]: Without dead ends: 575 [2021-11-19 14:01:10,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-19 14:01:10,686 INFO L933 BasicCegarLoop]: 875 mSDtfsCounter, 129 mSDsluCounter, 7792 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 8667 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:01:10,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 8667 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:01:10,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2021-11-19 14:01:10,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 575. [2021-11-19 14:01:10,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 445 states have (on average 1.604494382022472) internal successors, (714), 466 states have internal predecessors, (714), 102 states have call successors, (102), 28 states have call predecessors, (102), 27 states have return successors, (97), 94 states have call predecessors, (97), 97 states have call successors, (97) [2021-11-19 14:01:10,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 913 transitions. [2021-11-19 14:01:10,707 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 913 transitions. Word has length 105 [2021-11-19 14:01:10,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:01:10,708 INFO L470 AbstractCegarLoop]: Abstraction has 575 states and 913 transitions. [2021-11-19 14:01:10,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-19 14:01:10,708 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 913 transitions. [2021-11-19 14:01:10,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-19 14:01:10,710 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:01:10,710 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:01:10,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-19 14:01:10,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:01:10,926 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:01:10,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:01:10,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1131238039, now seen corresponding path program 1 times [2021-11-19 14:01:10,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:01:10,927 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1618825623] [2021-11-19 14:01:10,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:01:10,927 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:01:10,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:01:10,928 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:01:10,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-19 14:01:11,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:01:11,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 912 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:01:11,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:01:11,490 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:01:11,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:01:11,921 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:01:11,921 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:01:11,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1618825623] [2021-11-19 14:01:11,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1618825623] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:01:11,921 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:01:11,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 14:01:11,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988467913] [2021-11-19 14:01:11,922 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:01:11,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 14:01:11,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:01:11,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 14:01:11,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:01:11,923 INFO L87 Difference]: Start difference. First operand 575 states and 913 transitions. Second operand has 13 states, 11 states have (on average 11.0) internal successors, (121), 11 states have internal predecessors, (121), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-19 14:01:12,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:01:12,223 INFO L93 Difference]: Finished difference Result 1075 states and 1737 transitions. [2021-11-19 14:01:12,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:01:12,224 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 11.0) internal successors, (121), 11 states have internal predecessors, (121), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 106 [2021-11-19 14:01:12,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:01:12,229 INFO L225 Difference]: With dead ends: 1075 [2021-11-19 14:01:12,229 INFO L226 Difference]: Without dead ends: 575 [2021-11-19 14:01:12,233 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-19 14:01:12,235 INFO L933 BasicCegarLoop]: 876 mSDtfsCounter, 81 mSDsluCounter, 7824 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 8700 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:01:12,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 8700 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:01:12,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2021-11-19 14:01:12,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 575. [2021-11-19 14:01:12,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 445 states have (on average 1.602247191011236) internal successors, (713), 466 states have internal predecessors, (713), 102 states have call successors, (102), 28 states have call predecessors, (102), 27 states have return successors, (97), 94 states have call predecessors, (97), 97 states have call successors, (97) [2021-11-19 14:01:12,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 912 transitions. [2021-11-19 14:01:12,261 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 912 transitions. Word has length 106 [2021-11-19 14:01:12,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:01:12,262 INFO L470 AbstractCegarLoop]: Abstraction has 575 states and 912 transitions. [2021-11-19 14:01:12,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 11.0) internal successors, (121), 11 states have internal predecessors, (121), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-19 14:01:12,262 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 912 transitions. [2021-11-19 14:01:12,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-19 14:01:12,264 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:01:12,264 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:01:12,290 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-19 14:01:12,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:01:12,486 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:01:12,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:01:12,486 INFO L85 PathProgramCache]: Analyzing trace with hash -682474867, now seen corresponding path program 1 times [2021-11-19 14:01:12,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:01:12,487 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1854086068] [2021-11-19 14:01:12,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:01:12,487 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:01:12,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:01:12,488 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:01:12,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-19 14:01:12,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:01:12,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 913 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:01:12,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:01:13,122 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:01:13,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:01:13,559 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:01:13,559 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:01:13,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1854086068] [2021-11-19 14:01:13,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1854086068] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:01:13,560 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:01:13,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 14:01:13,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853537621] [2021-11-19 14:01:13,561 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:01:13,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 14:01:13,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:01:13,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 14:01:13,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:01:13,562 INFO L87 Difference]: Start difference. First operand 575 states and 912 transitions. Second operand has 13 states, 11 states have (on average 11.181818181818182) internal successors, (123), 11 states have internal predecessors, (123), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-19 14:01:13,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:01:13,810 INFO L93 Difference]: Finished difference Result 1113 states and 1782 transitions. [2021-11-19 14:01:13,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:01:13,812 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 11.181818181818182) internal successors, (123), 11 states have internal predecessors, (123), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 107 [2021-11-19 14:01:13,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:01:13,817 INFO L225 Difference]: With dead ends: 1113 [2021-11-19 14:01:13,817 INFO L226 Difference]: Without dead ends: 572 [2021-11-19 14:01:13,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-19 14:01:13,829 INFO L933 BasicCegarLoop]: 874 mSDtfsCounter, 87 mSDsluCounter, 8654 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 9528 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:01:13,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 9528 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:01:13,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2021-11-19 14:01:13,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 572. [2021-11-19 14:01:13,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 442 states have (on average 1.5950226244343892) internal successors, (705), 463 states have internal predecessors, (705), 102 states have call successors, (102), 28 states have call predecessors, (102), 27 states have return successors, (97), 94 states have call predecessors, (97), 97 states have call successors, (97) [2021-11-19 14:01:13,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 904 transitions. [2021-11-19 14:01:13,858 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 904 transitions. Word has length 107 [2021-11-19 14:01:13,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:01:13,858 INFO L470 AbstractCegarLoop]: Abstraction has 572 states and 904 transitions. [2021-11-19 14:01:13,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 11.181818181818182) internal successors, (123), 11 states have internal predecessors, (123), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-19 14:01:13,859 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 904 transitions. [2021-11-19 14:01:13,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-19 14:01:13,860 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:01:13,861 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:01:13,889 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-19 14:01:14,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:01:14,074 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:01:14,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:01:14,074 INFO L85 PathProgramCache]: Analyzing trace with hash 2133600348, now seen corresponding path program 1 times [2021-11-19 14:01:14,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:01:14,075 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [476868481] [2021-11-19 14:01:14,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:01:14,075 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:01:14,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:01:14,076 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:01:14,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-19 14:01:14,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:01:14,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 914 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:01:14,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:01:15,311 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 14:01:15,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:01:15,669 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 14:01:15,669 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:01:15,670 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [476868481] [2021-11-19 14:01:15,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [476868481] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:01:15,670 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:01:15,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 10 [2021-11-19 14:01:15,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395367477] [2021-11-19 14:01:15,671 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:01:15,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 14:01:15,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:01:15,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 14:01:15,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:01:15,673 INFO L87 Difference]: Start difference. First operand 572 states and 904 transitions. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 8 states have call successors, (21), 7 states have call predecessors, (21), 6 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) [2021-11-19 14:01:23,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:01:23,629 INFO L93 Difference]: Finished difference Result 2740 states and 4531 transitions. [2021-11-19 14:01:23,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-19 14:01:23,629 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 8 states have call successors, (21), 7 states have call predecessors, (21), 6 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) Word has length 108 [2021-11-19 14:01:23,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:01:23,641 INFO L225 Difference]: With dead ends: 2740 [2021-11-19 14:01:23,641 INFO L226 Difference]: Without dead ends: 2248 [2021-11-19 14:01:23,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:01:23,645 INFO L933 BasicCegarLoop]: 1568 mSDtfsCounter, 6735 mSDsluCounter, 1655 mSDsCounter, 0 mSdLazyCounter, 5155 mSolverCounterSat, 1912 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6919 SdHoareTripleChecker+Valid, 3223 SdHoareTripleChecker+Invalid, 7067 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1912 IncrementalHoareTripleChecker+Valid, 5155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2021-11-19 14:01:23,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6919 Valid, 3223 Invalid, 7067 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1912 Valid, 5155 Invalid, 0 Unknown, 0 Unchecked, 7.6s Time] [2021-11-19 14:01:23,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2248 states. [2021-11-19 14:01:23,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2248 to 2066. [2021-11-19 14:01:23,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2066 states, 1583 states have (on average 1.6506632975363233) internal successors, (2613), 1648 states have internal predecessors, (2613), 398 states have call successors, (398), 81 states have call predecessors, (398), 84 states have return successors, (406), 363 states have call predecessors, (406), 393 states have call successors, (406) [2021-11-19 14:01:23,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2066 states to 2066 states and 3417 transitions. [2021-11-19 14:01:23,756 INFO L78 Accepts]: Start accepts. Automaton has 2066 states and 3417 transitions. Word has length 108 [2021-11-19 14:01:23,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:01:23,756 INFO L470 AbstractCegarLoop]: Abstraction has 2066 states and 3417 transitions. [2021-11-19 14:01:23,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 8 states have call successors, (21), 7 states have call predecessors, (21), 6 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) [2021-11-19 14:01:23,757 INFO L276 IsEmpty]: Start isEmpty. Operand 2066 states and 3417 transitions. [2021-11-19 14:01:23,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-11-19 14:01:23,762 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:01:23,762 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:01:23,789 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-19 14:01:23,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:01:23,982 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:01:23,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:01:23,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1650353043, now seen corresponding path program 1 times [2021-11-19 14:01:23,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:01:23,983 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1961649651] [2021-11-19 14:01:23,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:01:23,983 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:01:23,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:01:23,984 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:01:23,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-19 14:01:24,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:01:24,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 1108 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:01:24,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:01:24,708 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-19 14:01:24,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:01:25,387 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-19 14:01:25,387 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:01:25,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1961649651] [2021-11-19 14:01:25,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1961649651] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:01:25,388 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:01:25,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 14:01:25,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937983043] [2021-11-19 14:01:25,389 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:01:25,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 14:01:25,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:01:25,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 14:01:25,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:01:25,402 INFO L87 Difference]: Start difference. First operand 2066 states and 3417 transitions. Second operand has 13 states, 13 states have (on average 12.153846153846153) internal successors, (158), 11 states have internal predecessors, (158), 7 states have call successors, (27), 5 states have call predecessors, (27), 5 states have return successors, (26), 7 states have call predecessors, (26), 6 states have call successors, (26) [2021-11-19 14:01:33,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:01:33,837 INFO L93 Difference]: Finished difference Result 5442 states and 9038 transitions. [2021-11-19 14:01:33,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-19 14:01:33,839 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 12.153846153846153) internal successors, (158), 11 states have internal predecessors, (158), 7 states have call successors, (27), 5 states have call predecessors, (27), 5 states have return successors, (26), 7 states have call predecessors, (26), 6 states have call successors, (26) Word has length 160 [2021-11-19 14:01:33,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:01:33,858 INFO L225 Difference]: With dead ends: 5442 [2021-11-19 14:01:33,858 INFO L226 Difference]: Without dead ends: 3456 [2021-11-19 14:01:33,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 311 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=198, Invalid=794, Unknown=0, NotChecked=0, Total=992 [2021-11-19 14:01:33,872 INFO L933 BasicCegarLoop]: 1799 mSDtfsCounter, 3473 mSDsluCounter, 4283 mSDsCounter, 0 mSdLazyCounter, 9069 mSolverCounterSat, 1357 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3563 SdHoareTripleChecker+Valid, 6082 SdHoareTripleChecker+Invalid, 10426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1357 IncrementalHoareTripleChecker+Valid, 9069 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2021-11-19 14:01:33,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3563 Valid, 6082 Invalid, 10426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1357 Valid, 9069 Invalid, 0 Unknown, 0 Unchecked, 7.9s Time] [2021-11-19 14:01:33,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3456 states. [2021-11-19 14:01:34,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3456 to 2990. [2021-11-19 14:01:34,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2990 states, 2235 states have (on average 1.6134228187919464) internal successors, (3606), 2326 states have internal predecessors, (3606), 624 states have call successors, (624), 114 states have call predecessors, (624), 130 states have return successors, (660), 582 states have call predecessors, (660), 619 states have call successors, (660) [2021-11-19 14:01:34,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2990 states to 2990 states and 4890 transitions. [2021-11-19 14:01:34,100 INFO L78 Accepts]: Start accepts. Automaton has 2990 states and 4890 transitions. Word has length 160 [2021-11-19 14:01:34,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:01:34,101 INFO L470 AbstractCegarLoop]: Abstraction has 2990 states and 4890 transitions. [2021-11-19 14:01:34,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 12.153846153846153) internal successors, (158), 11 states have internal predecessors, (158), 7 states have call successors, (27), 5 states have call predecessors, (27), 5 states have return successors, (26), 7 states have call predecessors, (26), 6 states have call successors, (26) [2021-11-19 14:01:34,101 INFO L276 IsEmpty]: Start isEmpty. Operand 2990 states and 4890 transitions. [2021-11-19 14:01:34,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-11-19 14:01:34,107 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:01:34,107 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:01:34,133 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-19 14:01:34,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:01:34,328 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:01:34,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:01:34,328 INFO L85 PathProgramCache]: Analyzing trace with hash -977057793, now seen corresponding path program 1 times [2021-11-19 14:01:34,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:01:34,328 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1022289392] [2021-11-19 14:01:34,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:01:34,329 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:01:34,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:01:34,329 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:01:34,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-19 14:01:34,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:01:34,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 1109 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:01:34,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:01:35,137 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-19 14:01:35,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:01:35,712 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-19 14:01:35,713 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:01:35,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1022289392] [2021-11-19 14:01:35,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1022289392] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:01:35,714 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:01:35,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 14:01:35,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798208086] [2021-11-19 14:01:35,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:01:35,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:01:35,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:01:35,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:01:35,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:01:35,724 INFO L87 Difference]: Start difference. First operand 2990 states and 4890 transitions. Second operand has 5 states, 5 states have (on average 21.6) internal successors, (108), 4 states have internal predecessors, (108), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-19 14:01:36,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:01:36,481 INFO L93 Difference]: Finished difference Result 5940 states and 9921 transitions. [2021-11-19 14:01:36,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:01:36,482 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.6) internal successors, (108), 4 states have internal predecessors, (108), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 161 [2021-11-19 14:01:36,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:01:36,496 INFO L225 Difference]: With dead ends: 5940 [2021-11-19 14:01:36,497 INFO L226 Difference]: Without dead ends: 3030 [2021-11-19 14:01:36,516 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 313 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:01:36,517 INFO L933 BasicCegarLoop]: 861 mSDtfsCounter, 808 mSDsluCounter, 1353 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 826 SdHoareTripleChecker+Valid, 2214 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 14:01:36,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [826 Valid, 2214 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 14:01:36,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3030 states. [2021-11-19 14:01:36,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3030 to 3030. [2021-11-19 14:01:36,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3030 states, 2265 states have (on average 1.6052980132450332) internal successors, (3636), 2356 states have internal predecessors, (3636), 624 states have call successors, (624), 124 states have call predecessors, (624), 140 states have return successors, (666), 582 states have call predecessors, (666), 619 states have call successors, (666) [2021-11-19 14:01:36,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3030 states to 3030 states and 4926 transitions. [2021-11-19 14:01:36,742 INFO L78 Accepts]: Start accepts. Automaton has 3030 states and 4926 transitions. Word has length 161 [2021-11-19 14:01:36,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:01:36,743 INFO L470 AbstractCegarLoop]: Abstraction has 3030 states and 4926 transitions. [2021-11-19 14:01:36,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.6) internal successors, (108), 4 states have internal predecessors, (108), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-19 14:01:36,743 INFO L276 IsEmpty]: Start isEmpty. Operand 3030 states and 4926 transitions. [2021-11-19 14:01:36,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-11-19 14:01:36,756 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:01:36,756 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:01:36,778 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-19 14:01:36,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:01:36,978 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:01:36,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:01:36,978 INFO L85 PathProgramCache]: Analyzing trace with hash 61818361, now seen corresponding path program 1 times [2021-11-19 14:01:36,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:01:36,979 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1881714506] [2021-11-19 14:01:36,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:01:36,979 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:01:36,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:01:36,980 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:01:36,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-19 14:01:37,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:01:37,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 1111 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:01:37,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:01:37,684 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-19 14:01:37,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:01:38,166 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-19 14:01:38,166 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:01:38,166 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1881714506] [2021-11-19 14:01:38,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1881714506] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:01:38,166 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:01:38,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 14:01:38,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988386152] [2021-11-19 14:01:38,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:01:38,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:01:38,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:01:38,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:01:38,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:01:38,168 INFO L87 Difference]: Start difference. First operand 3030 states and 4926 transitions. Second operand has 5 states, 5 states have (on average 22.0) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-19 14:01:38,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:01:38,910 INFO L93 Difference]: Finished difference Result 6030 states and 9993 transitions. [2021-11-19 14:01:38,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:01:38,910 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.0) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 163 [2021-11-19 14:01:38,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:01:38,932 INFO L225 Difference]: With dead ends: 6030 [2021-11-19 14:01:38,932 INFO L226 Difference]: Without dead ends: 3080 [2021-11-19 14:01:38,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 317 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:01:38,943 INFO L933 BasicCegarLoop]: 862 mSDtfsCounter, 809 mSDsluCounter, 1353 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 826 SdHoareTripleChecker+Valid, 2215 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 14:01:38,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [826 Valid, 2215 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 14:01:38,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3080 states. [2021-11-19 14:01:39,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3080 to 3080. [2021-11-19 14:01:39,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3080 states, 2305 states have (on average 1.5947939262472886) internal successors, (3676), 2396 states have internal predecessors, (3676), 624 states have call successors, (624), 134 states have call predecessors, (624), 150 states have return successors, (672), 582 states have call predecessors, (672), 619 states have call successors, (672) [2021-11-19 14:01:39,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3080 states to 3080 states and 4972 transitions. [2021-11-19 14:01:39,111 INFO L78 Accepts]: Start accepts. Automaton has 3080 states and 4972 transitions. Word has length 163 [2021-11-19 14:01:39,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:01:39,112 INFO L470 AbstractCegarLoop]: Abstraction has 3080 states and 4972 transitions. [2021-11-19 14:01:39,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.0) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-19 14:01:39,112 INFO L276 IsEmpty]: Start isEmpty. Operand 3080 states and 4972 transitions. [2021-11-19 14:01:39,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-19 14:01:39,117 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:01:39,118 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:01:39,140 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-19 14:01:39,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:01:39,334 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:01:39,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:01:39,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1482898305, now seen corresponding path program 1 times [2021-11-19 14:01:39,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:01:39,335 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [733364636] [2021-11-19 14:01:39,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:01:39,335 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:01:39,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:01:39,337 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:01:39,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-19 14:01:39,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:01:39,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 1113 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:01:39,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:01:40,055 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-19 14:01:40,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:01:40,591 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-19 14:01:40,591 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:01:40,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [733364636] [2021-11-19 14:01:40,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [733364636] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:01:40,591 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:01:40,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 14:01:40,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985374674] [2021-11-19 14:01:40,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:01:40,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:01:40,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:01:40,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:01:40,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:01:40,593 INFO L87 Difference]: Start difference. First operand 3080 states and 4972 transitions. Second operand has 5 states, 5 states have (on average 22.4) internal successors, (112), 4 states have internal predecessors, (112), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-19 14:01:41,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:01:41,403 INFO L93 Difference]: Finished difference Result 6140 states and 10085 transitions. [2021-11-19 14:01:41,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:01:41,404 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.4) internal successors, (112), 4 states have internal predecessors, (112), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 165 [2021-11-19 14:01:41,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:01:41,431 INFO L225 Difference]: With dead ends: 6140 [2021-11-19 14:01:41,431 INFO L226 Difference]: Without dead ends: 3140 [2021-11-19 14:01:41,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 321 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:01:41,444 INFO L933 BasicCegarLoop]: 862 mSDtfsCounter, 806 mSDsluCounter, 1353 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 823 SdHoareTripleChecker+Valid, 2215 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:01:41,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [823 Valid, 2215 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 450 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 14:01:41,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3140 states. [2021-11-19 14:01:41,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3140 to 3140. [2021-11-19 14:01:41,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3140 states, 2355 states have (on average 1.5821656050955415) internal successors, (3726), 2446 states have internal predecessors, (3726), 624 states have call successors, (624), 144 states have call predecessors, (624), 160 states have return successors, (678), 582 states have call predecessors, (678), 619 states have call successors, (678) [2021-11-19 14:01:41,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3140 states to 3140 states and 5028 transitions. [2021-11-19 14:01:41,605 INFO L78 Accepts]: Start accepts. Automaton has 3140 states and 5028 transitions. Word has length 165 [2021-11-19 14:01:41,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:01:41,607 INFO L470 AbstractCegarLoop]: Abstraction has 3140 states and 5028 transitions. [2021-11-19 14:01:41,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.4) internal successors, (112), 4 states have internal predecessors, (112), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-19 14:01:41,607 INFO L276 IsEmpty]: Start isEmpty. Operand 3140 states and 5028 transitions. [2021-11-19 14:01:41,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-11-19 14:01:41,612 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:01:41,613 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:01:41,634 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-19 14:01:41,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:01:41,826 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:01:41,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:01:41,826 INFO L85 PathProgramCache]: Analyzing trace with hash 1683405681, now seen corresponding path program 1 times [2021-11-19 14:01:41,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:01:41,827 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2454780] [2021-11-19 14:01:41,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:01:41,827 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:01:41,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:01:41,855 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:01:41,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-19 14:01:42,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:01:42,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 1115 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:01:42,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:01:42,629 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-19 14:01:42,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:01:43,166 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-19 14:01:43,166 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:01:43,166 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2454780] [2021-11-19 14:01:43,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2454780] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:01:43,166 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:01:43,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 14:01:43,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678630227] [2021-11-19 14:01:43,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:01:43,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:01:43,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:01:43,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:01:43,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:01:43,168 INFO L87 Difference]: Start difference. First operand 3140 states and 5028 transitions. Second operand has 5 states, 5 states have (on average 22.8) internal successors, (114), 4 states have internal predecessors, (114), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-19 14:01:43,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:01:43,887 INFO L93 Difference]: Finished difference Result 6270 states and 10197 transitions. [2021-11-19 14:01:43,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:01:43,888 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.8) internal successors, (114), 4 states have internal predecessors, (114), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 167 [2021-11-19 14:01:43,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:01:43,904 INFO L225 Difference]: With dead ends: 6270 [2021-11-19 14:01:43,904 INFO L226 Difference]: Without dead ends: 3210 [2021-11-19 14:01:43,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:01:43,918 INFO L933 BasicCegarLoop]: 862 mSDtfsCounter, 809 mSDsluCounter, 1353 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 826 SdHoareTripleChecker+Valid, 2215 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 14:01:43,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [826 Valid, 2215 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 14:01:43,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3210 states. [2021-11-19 14:01:44,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3210 to 3210. [2021-11-19 14:01:44,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3210 states, 2415 states have (on average 1.5677018633540372) internal successors, (3786), 2506 states have internal predecessors, (3786), 624 states have call successors, (624), 154 states have call predecessors, (624), 170 states have return successors, (684), 582 states have call predecessors, (684), 619 states have call successors, (684) [2021-11-19 14:01:44,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3210 states to 3210 states and 5094 transitions. [2021-11-19 14:01:44,112 INFO L78 Accepts]: Start accepts. Automaton has 3210 states and 5094 transitions. Word has length 167 [2021-11-19 14:01:44,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:01:44,113 INFO L470 AbstractCegarLoop]: Abstraction has 3210 states and 5094 transitions. [2021-11-19 14:01:44,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.8) internal successors, (114), 4 states have internal predecessors, (114), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-19 14:01:44,113 INFO L276 IsEmpty]: Start isEmpty. Operand 3210 states and 5094 transitions. [2021-11-19 14:01:44,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-11-19 14:01:44,119 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:01:44,119 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:01:44,142 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-19 14:01:44,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:01:44,341 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:01:44,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:01:44,342 INFO L85 PathProgramCache]: Analyzing trace with hash -940200193, now seen corresponding path program 1 times [2021-11-19 14:01:44,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:01:44,343 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [819830798] [2021-11-19 14:01:44,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:01:44,343 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:01:44,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:01:44,344 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:01:44,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-19 14:01:44,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:01:44,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 1117 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-19 14:01:44,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:01:45,307 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 14:01:45,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:01:46,412 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-19 14:01:46,413 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:01:46,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [819830798] [2021-11-19 14:01:46,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [819830798] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:01:46,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1795849252] [2021-11-19 14:01:46,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:01:46,414 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:01:46,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:01:46,416 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:01:46,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2021-11-19 14:01:46,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:01:46,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 1117 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-19 14:01:46,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:01:47,083 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-19 14:01:47,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:01:47,771 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-19 14:01:47,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1795849252] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:01:47,771 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:01:47,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [11, 10] total 21 [2021-11-19 14:01:47,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413830986] [2021-11-19 14:01:47,772 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:01:47,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:01:47,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:01:47,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:01:47,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-11-19 14:01:47,774 INFO L87 Difference]: Start difference. First operand 3210 states and 5094 transitions. Second operand has 5 states, 5 states have (on average 31.8) internal successors, (159), 5 states have internal predecessors, (159), 5 states have call successors, (29), 4 states have call predecessors, (29), 3 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-19 14:01:48,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:01:48,521 INFO L93 Difference]: Finished difference Result 6291 states and 10052 transitions. [2021-11-19 14:01:48,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:01:48,522 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.8) internal successors, (159), 5 states have internal predecessors, (159), 5 states have call successors, (29), 4 states have call predecessors, (29), 3 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) Word has length 169 [2021-11-19 14:01:48,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:01:48,539 INFO L225 Difference]: With dead ends: 6291 [2021-11-19 14:01:48,539 INFO L226 Difference]: Without dead ends: 3161 [2021-11-19 14:01:48,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 674 GetRequests, 654 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-11-19 14:01:48,550 INFO L933 BasicCegarLoop]: 785 mSDtfsCounter, 1943 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 551 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1943 SdHoareTripleChecker+Valid, 799 SdHoareTripleChecker+Invalid, 655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 551 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 14:01:48,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1943 Valid, 799 Invalid, 655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [551 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 14:01:48,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3161 states. [2021-11-19 14:01:48,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3161 to 3161. [2021-11-19 14:01:48,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3161 states, 2383 states have (on average 1.561477129668485) internal successors, (3721), 2473 states have internal predecessors, (3721), 607 states have call successors, (607), 154 states have call predecessors, (607), 170 states have return successors, (668), 566 states have call predecessors, (668), 603 states have call successors, (668) [2021-11-19 14:01:48,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3161 states to 3161 states and 4996 transitions. [2021-11-19 14:01:48,724 INFO L78 Accepts]: Start accepts. Automaton has 3161 states and 4996 transitions. Word has length 169 [2021-11-19 14:01:48,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:01:48,725 INFO L470 AbstractCegarLoop]: Abstraction has 3161 states and 4996 transitions. [2021-11-19 14:01:48,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.8) internal successors, (159), 5 states have internal predecessors, (159), 5 states have call successors, (29), 4 states have call predecessors, (29), 3 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-19 14:01:48,726 INFO L276 IsEmpty]: Start isEmpty. Operand 3161 states and 4996 transitions. [2021-11-19 14:01:48,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-11-19 14:01:48,731 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:01:48,731 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:01:48,756 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-19 14:01:48,955 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (32)] Ended with exit code 0 [2021-11-19 14:01:49,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:01:49,153 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:01:49,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:01:49,154 INFO L85 PathProgramCache]: Analyzing trace with hash 918278597, now seen corresponding path program 1 times [2021-11-19 14:01:49,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:01:49,154 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2023034150] [2021-11-19 14:01:49,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:01:49,154 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:01:49,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:01:49,155 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:01:49,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-19 14:01:49,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:01:49,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 1118 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-19 14:01:49,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:01:50,042 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 14:01:50,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:01:51,165 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-19 14:01:51,165 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:01:51,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2023034150] [2021-11-19 14:01:51,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2023034150] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:01:51,166 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2061700617] [2021-11-19 14:01:51,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:01:51,166 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:01:51,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:01:51,190 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:01:51,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2021-11-19 14:01:51,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:01:51,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 1118 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-19 14:01:51,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:01:52,056 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 14:01:52,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:01:53,220 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-19 14:01:53,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2061700617] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:01:53,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023062579] [2021-11-19 14:01:53,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:01:53,221 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:01:53,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:01:53,226 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:01:53,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-19 14:01:53,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:01:53,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 1118 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-19 14:01:53,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:01:53,958 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 14:01:53,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:01:55,024 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-19 14:01:55,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023062579] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:01:55,024 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:01:55,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 11, 10, 11, 10] total 18 [2021-11-19 14:01:55,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583166739] [2021-11-19 14:01:55,025 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:01:55,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-19 14:01:55,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:01:55,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-19 14:01:55,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-11-19 14:01:55,032 INFO L87 Difference]: Start difference. First operand 3161 states and 4996 transitions. Second operand has 18 states, 18 states have (on average 11.277777777777779) internal successors, (203), 14 states have internal predecessors, (203), 8 states have call successors, (35), 5 states have call predecessors, (35), 10 states have return successors, (36), 12 states have call predecessors, (36), 7 states have call successors, (36) [2021-11-19 14:02:03,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:02:03,481 INFO L93 Difference]: Finished difference Result 10916 states and 17787 transitions. [2021-11-19 14:02:03,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-19 14:02:03,483 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 11.277777777777779) internal successors, (203), 14 states have internal predecessors, (203), 8 states have call successors, (35), 5 states have call predecessors, (35), 10 states have return successors, (36), 12 states have call predecessors, (36), 7 states have call successors, (36) Word has length 170 [2021-11-19 14:02:03,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:02:03,533 INFO L225 Difference]: With dead ends: 10916 [2021-11-19 14:02:03,533 INFO L226 Difference]: Without dead ends: 7835 [2021-11-19 14:02:03,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1028 GetRequests, 1000 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=176, Invalid=694, Unknown=0, NotChecked=0, Total=870 [2021-11-19 14:02:03,551 INFO L933 BasicCegarLoop]: 1702 mSDtfsCounter, 4533 mSDsluCounter, 4464 mSDsCounter, 0 mSdLazyCounter, 8549 mSolverCounterSat, 1752 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4612 SdHoareTripleChecker+Valid, 6166 SdHoareTripleChecker+Invalid, 10301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1752 IncrementalHoareTripleChecker+Valid, 8549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:02:03,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4612 Valid, 6166 Invalid, 10301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1752 Valid, 8549 Invalid, 0 Unknown, 0 Unchecked, 7.8s Time] [2021-11-19 14:02:03,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7835 states. [2021-11-19 14:02:03,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7835 to 7024. [2021-11-19 14:02:03,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7024 states, 5235 states have (on average 1.560458452722063) internal successors, (8169), 5429 states have internal predecessors, (8169), 1416 states have call successors, (1416), 301 states have call predecessors, (1416), 372 states have return successors, (1701), 1374 states have call predecessors, (1701), 1412 states have call successors, (1701) [2021-11-19 14:02:04,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7024 states to 7024 states and 11286 transitions. [2021-11-19 14:02:04,044 INFO L78 Accepts]: Start accepts. Automaton has 7024 states and 11286 transitions. Word has length 170 [2021-11-19 14:02:04,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:02:04,045 INFO L470 AbstractCegarLoop]: Abstraction has 7024 states and 11286 transitions. [2021-11-19 14:02:04,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 11.277777777777779) internal successors, (203), 14 states have internal predecessors, (203), 8 states have call successors, (35), 5 states have call predecessors, (35), 10 states have return successors, (36), 12 states have call predecessors, (36), 7 states have call successors, (36) [2021-11-19 14:02:04,046 INFO L276 IsEmpty]: Start isEmpty. Operand 7024 states and 11286 transitions. [2021-11-19 14:02:04,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-11-19 14:02:04,058 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:02:04,058 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:02:04,070 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (34)] Forceful destruction successful, exit code 0 [2021-11-19 14:02:04,288 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-11-19 14:02:04,510 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-19 14:02:04,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:02:04,670 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:02:04,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:02:04,671 INFO L85 PathProgramCache]: Analyzing trace with hash -441118518, now seen corresponding path program 1 times [2021-11-19 14:02:04,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:02:04,671 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1553608239] [2021-11-19 14:02:04,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:02:04,672 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:02:04,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:02:04,673 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:02:04,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-11-19 14:02:05,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:02:05,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 1120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:02:05,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:02:05,446 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 14:02:05,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:02:05,995 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 14:02:05,996 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:02:05,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1553608239] [2021-11-19 14:02:05,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1553608239] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:02:05,996 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:02:05,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 10 [2021-11-19 14:02:05,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080974189] [2021-11-19 14:02:05,996 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:02:05,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 14:02:05,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:02:05,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 14:02:05,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:02:05,998 INFO L87 Difference]: Start difference. First operand 7024 states and 11286 transitions. Second operand has 10 states, 9 states have (on average 21.22222222222222) internal successors, (191), 9 states have internal predecessors, (191), 3 states have call successors, (29), 2 states have call predecessors, (29), 4 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2021-11-19 14:02:06,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:02:06,326 INFO L93 Difference]: Finished difference Result 10083 states and 16148 transitions. [2021-11-19 14:02:06,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:02:06,327 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 21.22222222222222) internal successors, (191), 9 states have internal predecessors, (191), 3 states have call successors, (29), 2 states have call predecessors, (29), 4 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) Word has length 172 [2021-11-19 14:02:06,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:02:06,341 INFO L225 Difference]: With dead ends: 10083 [2021-11-19 14:02:06,341 INFO L226 Difference]: Without dead ends: 3129 [2021-11-19 14:02:06,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 337 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:02:06,364 INFO L933 BasicCegarLoop]: 857 mSDtfsCounter, 105 mSDsluCounter, 5089 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 5946 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:02:06,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 5946 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:02:06,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3129 states. [2021-11-19 14:02:06,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3129 to 3129. [2021-11-19 14:02:06,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3129 states, 2363 states have (on average 1.5598815065594582) internal successors, (3686), 2453 states have internal predecessors, (3686), 595 states have call successors, (595), 154 states have call predecessors, (595), 170 states have return successors, (656), 554 states have call predecessors, (656), 591 states have call successors, (656) [2021-11-19 14:02:06,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3129 states to 3129 states and 4937 transitions. [2021-11-19 14:02:06,559 INFO L78 Accepts]: Start accepts. Automaton has 3129 states and 4937 transitions. Word has length 172 [2021-11-19 14:02:06,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:02:06,560 INFO L470 AbstractCegarLoop]: Abstraction has 3129 states and 4937 transitions. [2021-11-19 14:02:06,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 21.22222222222222) internal successors, (191), 9 states have internal predecessors, (191), 3 states have call successors, (29), 2 states have call predecessors, (29), 4 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2021-11-19 14:02:06,561 INFO L276 IsEmpty]: Start isEmpty. Operand 3129 states and 4937 transitions. [2021-11-19 14:02:06,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-11-19 14:02:06,567 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:02:06,567 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:02:06,590 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-11-19 14:02:06,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:02:06,782 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:02:06,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:02:06,783 INFO L85 PathProgramCache]: Analyzing trace with hash 412913219, now seen corresponding path program 1 times [2021-11-19 14:02:06,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:02:06,783 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1800926034] [2021-11-19 14:02:06,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:02:06,784 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:02:06,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:02:06,785 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:02:06,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-11-19 14:02:07,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:02:07,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 1128 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-19 14:02:07,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:02:08,063 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-19 14:02:08,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:02:09,213 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-19 14:02:09,213 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:02:09,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1800926034] [2021-11-19 14:02:09,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1800926034] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:02:09,214 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [30343462] [2021-11-19 14:02:09,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:02:09,214 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:02:09,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:02:09,215 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:02:09,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2021-11-19 14:02:09,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:02:09,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 1128 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-19 14:02:09,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:02:10,064 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-19 14:02:10,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:02:11,002 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-19 14:02:11,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [30343462] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:02:11,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041192584] [2021-11-19 14:02:11,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:02:11,003 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:02:11,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:02:11,004 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:02:11,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-19 14:02:11,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:02:11,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 1128 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-19 14:02:11,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:02:11,736 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-19 14:02:11,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:02:12,755 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-19 14:02:12,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041192584] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:02:12,755 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:02:12,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 14 [2021-11-19 14:02:12,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052851307] [2021-11-19 14:02:12,756 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:02:12,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-19 14:02:12,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:02:12,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-19 14:02:12,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:02:12,758 INFO L87 Difference]: Start difference. First operand 3129 states and 4937 transitions. Second operand has 14 states, 14 states have (on average 14.5) internal successors, (203), 12 states have internal predecessors, (203), 8 states have call successors, (36), 5 states have call predecessors, (36), 8 states have return successors, (36), 10 states have call predecessors, (36), 7 states have call successors, (36) [2021-11-19 14:02:15,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:02:15,731 INFO L93 Difference]: Finished difference Result 6224 states and 9922 transitions. [2021-11-19 14:02:15,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:02:15,732 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 14.5) internal successors, (203), 12 states have internal predecessors, (203), 8 states have call successors, (36), 5 states have call predecessors, (36), 8 states have return successors, (36), 10 states have call predecessors, (36), 7 states have call successors, (36) Word has length 176 [2021-11-19 14:02:15,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:02:15,751 INFO L225 Difference]: With dead ends: 6224 [2021-11-19 14:02:15,751 INFO L226 Difference]: Without dead ends: 3173 [2021-11-19 14:02:15,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1056 GetRequests, 1040 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-11-19 14:02:15,764 INFO L933 BasicCegarLoop]: 772 mSDtfsCounter, 1322 mSDsluCounter, 2146 mSDsCounter, 0 mSdLazyCounter, 4056 mSolverCounterSat, 374 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1322 SdHoareTripleChecker+Valid, 2918 SdHoareTripleChecker+Invalid, 4430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 374 IncrementalHoareTripleChecker+Valid, 4056 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:02:15,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1322 Valid, 2918 Invalid, 4430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [374 Valid, 4056 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-11-19 14:02:15,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3173 states. [2021-11-19 14:02:16,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3173 to 3153. [2021-11-19 14:02:16,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3153 states, 2381 states have (on average 1.5556488870222596) internal successors, (3704), 2471 states have internal predecessors, (3704), 595 states have call successors, (595), 154 states have call predecessors, (595), 176 states have return successors, (680), 560 states have call predecessors, (680), 591 states have call successors, (680) [2021-11-19 14:02:16,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3153 states to 3153 states and 4979 transitions. [2021-11-19 14:02:16,069 INFO L78 Accepts]: Start accepts. Automaton has 3153 states and 4979 transitions. Word has length 176 [2021-11-19 14:02:16,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:02:16,070 INFO L470 AbstractCegarLoop]: Abstraction has 3153 states and 4979 transitions. [2021-11-19 14:02:16,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 14.5) internal successors, (203), 12 states have internal predecessors, (203), 8 states have call successors, (36), 5 states have call predecessors, (36), 8 states have return successors, (36), 10 states have call predecessors, (36), 7 states have call successors, (36) [2021-11-19 14:02:16,070 INFO L276 IsEmpty]: Start isEmpty. Operand 3153 states and 4979 transitions. [2021-11-19 14:02:16,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-11-19 14:02:16,077 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:02:16,077 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:02:16,086 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (38)] Forceful destruction successful, exit code 0 [2021-11-19 14:02:16,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-11-19 14:02:16,517 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2021-11-19 14:02:16,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:02:16,690 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:02:16,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:02:16,691 INFO L85 PathProgramCache]: Analyzing trace with hash -735986178, now seen corresponding path program 1 times [2021-11-19 14:02:16,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:02:16,691 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1552016944] [2021-11-19 14:02:16,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:02:16,692 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:02:16,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:02:16,693 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:02:16,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-11-19 14:02:17,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:02:17,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 1129 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:02:17,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:02:17,456 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-19 14:02:17,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:02:18,058 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-19 14:02:18,058 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:02:18,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1552016944] [2021-11-19 14:02:18,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1552016944] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:02:18,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [417489566] [2021-11-19 14:02:18,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:02:18,059 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:02:18,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:02:18,059 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:02:18,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2021-11-19 14:02:18,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:02:18,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 1129 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:02:18,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:02:18,771 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-19 14:02:18,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:02:19,357 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-19 14:02:19,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [417489566] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:02:19,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789366510] [2021-11-19 14:02:19,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:02:19,357 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:02:19,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:02:19,359 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:02:19,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-19 14:02:19,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:02:19,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 1129 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:02:19,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:02:19,917 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-19 14:02:19,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:02:20,520 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-19 14:02:20,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789366510] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:02:20,520 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:02:20,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 11 [2021-11-19 14:02:20,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994250500] [2021-11-19 14:02:20,521 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:02:20,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 14:02:20,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:02:20,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 14:02:20,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:02:20,524 INFO L87 Difference]: Start difference. First operand 3153 states and 4979 transitions. Second operand has 11 states, 11 states have (on average 15.363636363636363) internal successors, (169), 11 states have internal predecessors, (169), 6 states have call successors, (31), 5 states have call predecessors, (31), 6 states have return successors, (30), 7 states have call predecessors, (30), 5 states have call successors, (30) [2021-11-19 14:02:26,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:02:26,796 INFO L93 Difference]: Finished difference Result 10958 states and 17468 transitions. [2021-11-19 14:02:26,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-19 14:02:26,796 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 15.363636363636363) internal successors, (169), 11 states have internal predecessors, (169), 6 states have call successors, (31), 5 states have call predecessors, (31), 6 states have return successors, (30), 7 states have call predecessors, (30), 5 states have call successors, (30) Word has length 177 [2021-11-19 14:02:26,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:02:26,837 INFO L225 Difference]: With dead ends: 10958 [2021-11-19 14:02:26,837 INFO L226 Difference]: Without dead ends: 7871 [2021-11-19 14:02:26,849 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1076 GetRequests, 1056 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=326, Unknown=0, NotChecked=0, Total=462 [2021-11-19 14:02:26,850 INFO L933 BasicCegarLoop]: 1385 mSDtfsCounter, 3960 mSDsluCounter, 2393 mSDsCounter, 0 mSdLazyCounter, 5634 mSolverCounterSat, 1151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4042 SdHoareTripleChecker+Valid, 3778 SdHoareTripleChecker+Invalid, 6785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1151 IncrementalHoareTripleChecker+Valid, 5634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2021-11-19 14:02:26,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4042 Valid, 3778 Invalid, 6785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1151 Valid, 5634 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2021-11-19 14:02:26,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7871 states. [2021-11-19 14:02:27,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7871 to 7819. [2021-11-19 14:02:27,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7819 states, 5919 states have (on average 1.5306639635073491) internal successors, (9060), 6125 states have internal predecessors, (9060), 1423 states have call successors, (1423), 434 states have call predecessors, (1423), 476 states have return successors, (1734), 1336 states have call predecessors, (1734), 1419 states have call successors, (1734) [2021-11-19 14:02:27,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7819 states to 7819 states and 12217 transitions. [2021-11-19 14:02:27,547 INFO L78 Accepts]: Start accepts. Automaton has 7819 states and 12217 transitions. Word has length 177 [2021-11-19 14:02:27,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:02:27,548 INFO L470 AbstractCegarLoop]: Abstraction has 7819 states and 12217 transitions. [2021-11-19 14:02:27,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.363636363636363) internal successors, (169), 11 states have internal predecessors, (169), 6 states have call successors, (31), 5 states have call predecessors, (31), 6 states have return successors, (30), 7 states have call predecessors, (30), 5 states have call successors, (30) [2021-11-19 14:02:27,549 INFO L276 IsEmpty]: Start isEmpty. Operand 7819 states and 12217 transitions. [2021-11-19 14:02:27,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-11-19 14:02:27,554 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:02:27,554 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:02:27,565 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (41)] Forceful destruction successful, exit code 0 [2021-11-19 14:02:27,784 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2021-11-19 14:02:27,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-11-19 14:02:28,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:02:28,166 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:02:28,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:02:28,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1225495231, now seen corresponding path program 1 times [2021-11-19 14:02:28,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:02:28,167 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [592016912] [2021-11-19 14:02:28,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:02:28,168 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:02:28,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:02:28,169 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:02:28,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-11-19 14:02:28,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:02:28,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 1135 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-19 14:02:28,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:02:29,074 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 14:02:29,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:02:29,774 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-19 14:02:29,774 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:02:29,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [592016912] [2021-11-19 14:02:29,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [592016912] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:02:29,774 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:02:29,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 12 [2021-11-19 14:02:29,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844761505] [2021-11-19 14:02:29,775 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:02:29,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:02:29,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:02:29,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:02:29,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:02:29,776 INFO L87 Difference]: Start difference. First operand 7819 states and 12217 transitions. Second operand has 12 states, 12 states have (on average 17.75) internal successors, (213), 12 states have internal predecessors, (213), 8 states have call successors, (36), 6 states have call predecessors, (36), 5 states have return successors, (35), 8 states have call predecessors, (35), 7 states have call successors, (35) [2021-11-19 14:02:36,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:02:36,529 INFO L93 Difference]: Finished difference Result 22592 states and 36507 transitions. [2021-11-19 14:02:36,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-19 14:02:36,531 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 17.75) internal successors, (213), 12 states have internal predecessors, (213), 8 states have call successors, (36), 6 states have call predecessors, (36), 5 states have return successors, (35), 8 states have call predecessors, (35), 7 states have call successors, (35) Word has length 179 [2021-11-19 14:02:36,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:02:36,624 INFO L225 Difference]: With dead ends: 22592 [2021-11-19 14:02:36,624 INFO L226 Difference]: Without dead ends: 14845 [2021-11-19 14:02:36,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 347 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2021-11-19 14:02:36,668 INFO L933 BasicCegarLoop]: 1716 mSDtfsCounter, 5396 mSDsluCounter, 1947 mSDsCounter, 0 mSdLazyCounter, 4830 mSolverCounterSat, 1835 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5492 SdHoareTripleChecker+Valid, 3663 SdHoareTripleChecker+Invalid, 6665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1835 IncrementalHoareTripleChecker+Valid, 4830 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2021-11-19 14:02:36,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5492 Valid, 3663 Invalid, 6665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1835 Valid, 4830 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2021-11-19 14:02:36,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14845 states. [2021-11-19 14:02:38,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14845 to 13755. [2021-11-19 14:02:38,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13755 states, 10124 states have (on average 1.5307190833662585) internal successors, (15497), 10601 states have internal predecessors, (15497), 2858 states have call successors, (2858), 651 states have call predecessors, (2858), 772 states have return successors, (3555), 2768 states have call predecessors, (3555), 2854 states have call successors, (3555) [2021-11-19 14:02:38,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13755 states to 13755 states and 21910 transitions. [2021-11-19 14:02:38,116 INFO L78 Accepts]: Start accepts. Automaton has 13755 states and 21910 transitions. Word has length 179 [2021-11-19 14:02:38,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:02:38,117 INFO L470 AbstractCegarLoop]: Abstraction has 13755 states and 21910 transitions. [2021-11-19 14:02:38,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 17.75) internal successors, (213), 12 states have internal predecessors, (213), 8 states have call successors, (36), 6 states have call predecessors, (36), 5 states have return successors, (35), 8 states have call predecessors, (35), 7 states have call successors, (35) [2021-11-19 14:02:38,117 INFO L276 IsEmpty]: Start isEmpty. Operand 13755 states and 21910 transitions. [2021-11-19 14:02:38,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-11-19 14:02:38,124 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:02:38,124 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:02:38,150 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2021-11-19 14:02:38,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:02:38,349 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:02:38,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:02:38,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1287972130, now seen corresponding path program 1 times [2021-11-19 14:02:38,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:02:38,350 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [75950858] [2021-11-19 14:02:38,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:02:38,350 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:02:38,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:02:38,351 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:02:38,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2021-11-19 14:02:38,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:02:38,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 1135 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 14:02:38,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:02:39,296 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-19 14:02:39,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:02:40,056 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-19 14:02:40,056 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:02:40,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [75950858] [2021-11-19 14:02:40,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [75950858] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:02:40,056 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:02:40,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 12 [2021-11-19 14:02:40,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555549751] [2021-11-19 14:02:40,057 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:02:40,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:02:40,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:02:40,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:02:40,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:02:40,059 INFO L87 Difference]: Start difference. First operand 13755 states and 21910 transitions. Second operand has 12 states, 12 states have (on average 14.666666666666666) internal successors, (176), 12 states have internal predecessors, (176), 8 states have call successors, (33), 5 states have call predecessors, (33), 5 states have return successors, (31), 8 states have call predecessors, (31), 7 states have call successors, (31) [2021-11-19 14:02:47,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:02:47,139 INFO L93 Difference]: Finished difference Result 41319 states and 67271 transitions. [2021-11-19 14:02:47,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-19 14:02:47,140 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 14.666666666666666) internal successors, (176), 12 states have internal predecessors, (176), 8 states have call successors, (33), 5 states have call predecessors, (33), 5 states have return successors, (31), 8 states have call predecessors, (31), 7 states have call successors, (31) Word has length 179 [2021-11-19 14:02:47,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:02:47,277 INFO L225 Difference]: With dead ends: 41319 [2021-11-19 14:02:47,277 INFO L226 Difference]: Without dead ends: 29518 [2021-11-19 14:02:47,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 350 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=189, Invalid=513, Unknown=0, NotChecked=0, Total=702 [2021-11-19 14:02:47,325 INFO L933 BasicCegarLoop]: 1038 mSDtfsCounter, 4569 mSDsluCounter, 1839 mSDsCounter, 0 mSdLazyCounter, 4631 mSolverCounterSat, 1138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4642 SdHoareTripleChecker+Valid, 2877 SdHoareTripleChecker+Invalid, 5769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1138 IncrementalHoareTripleChecker+Valid, 4631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:02:47,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4642 Valid, 2877 Invalid, 5769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1138 Valid, 4631 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2021-11-19 14:02:47,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29518 states. [2021-11-19 14:02:49,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29518 to 28065. [2021-11-19 14:02:49,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28065 states, 20658 states have (on average 1.5296737341465776) internal successors, (31600), 21680 states have internal predecessors, (31600), 5713 states have call successors, (5713), 1260 states have call predecessors, (5713), 1693 states have return successors, (7854), 5618 states have call predecessors, (7854), 5709 states have call successors, (7854) [2021-11-19 14:02:49,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28065 states to 28065 states and 45167 transitions. [2021-11-19 14:02:49,835 INFO L78 Accepts]: Start accepts. Automaton has 28065 states and 45167 transitions. Word has length 179 [2021-11-19 14:02:49,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:02:49,836 INFO L470 AbstractCegarLoop]: Abstraction has 28065 states and 45167 transitions. [2021-11-19 14:02:49,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 14.666666666666666) internal successors, (176), 12 states have internal predecessors, (176), 8 states have call successors, (33), 5 states have call predecessors, (33), 5 states have return successors, (31), 8 states have call predecessors, (31), 7 states have call successors, (31) [2021-11-19 14:02:49,837 INFO L276 IsEmpty]: Start isEmpty. Operand 28065 states and 45167 transitions. [2021-11-19 14:02:49,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-11-19 14:02:49,842 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:02:49,842 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:02:49,869 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2021-11-19 14:02:50,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:02:50,062 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:02:50,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:02:50,062 INFO L85 PathProgramCache]: Analyzing trace with hash -671897570, now seen corresponding path program 1 times [2021-11-19 14:02:50,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:02:50,063 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [259555745] [2021-11-19 14:02:50,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:02:50,063 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:02:50,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:02:50,064 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:02:50,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2021-11-19 14:02:50,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:02:50,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 1135 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-19 14:02:50,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:02:51,093 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-19 14:02:51,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:02:52,351 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-19 14:02:52,351 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:02:52,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [259555745] [2021-11-19 14:02:52,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [259555745] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:02:52,351 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:02:52,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11, 11] imperfect sequences [] total 18 [2021-11-19 14:02:52,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374784183] [2021-11-19 14:02:52,352 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:02:52,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-19 14:02:52,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:02:52,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-19 14:02:52,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-11-19 14:02:52,353 INFO L87 Difference]: Start difference. First operand 28065 states and 45167 transitions. Second operand has 18 states, 18 states have (on average 10.666666666666666) internal successors, (192), 14 states have internal predecessors, (192), 8 states have call successors, (36), 5 states have call predecessors, (36), 10 states have return successors, (38), 12 states have call predecessors, (38), 7 states have call successors, (38) [2021-11-19 14:02:57,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:02:57,554 INFO L93 Difference]: Finished difference Result 53963 states and 87681 transitions. [2021-11-19 14:02:57,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:02:57,555 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 10.666666666666666) internal successors, (192), 14 states have internal predecessors, (192), 8 states have call successors, (36), 5 states have call predecessors, (36), 10 states have return successors, (38), 12 states have call predecessors, (38), 7 states have call successors, (38) Word has length 181 [2021-11-19 14:02:57,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:02:57,676 INFO L225 Difference]: With dead ends: 53963 [2021-11-19 14:02:57,677 INFO L226 Difference]: Without dead ends: 27852 [2021-11-19 14:02:57,748 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 346 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2021-11-19 14:02:57,749 INFO L933 BasicCegarLoop]: 769 mSDtfsCounter, 2049 mSDsluCounter, 2450 mSDsCounter, 0 mSdLazyCounter, 4292 mSolverCounterSat, 554 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2049 SdHoareTripleChecker+Valid, 3219 SdHoareTripleChecker+Invalid, 4846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 554 IncrementalHoareTripleChecker+Valid, 4292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:02:57,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2049 Valid, 3219 Invalid, 4846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [554 Valid, 4292 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-11-19 14:02:57,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27852 states. [2021-11-19 14:02:59,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27852 to 27852. [2021-11-19 14:02:59,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27852 states, 20541 states have (on average 1.5299157781996982) internal successors, (31426), 21545 states have internal predecessors, (31426), 5656 states have call successors, (5656), 1239 states have call predecessors, (5656), 1654 states have return successors, (7761), 5561 states have call predecessors, (7761), 5652 states have call successors, (7761) [2021-11-19 14:02:59,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27852 states to 27852 states and 44843 transitions. [2021-11-19 14:02:59,949 INFO L78 Accepts]: Start accepts. Automaton has 27852 states and 44843 transitions. Word has length 181 [2021-11-19 14:02:59,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:02:59,950 INFO L470 AbstractCegarLoop]: Abstraction has 27852 states and 44843 transitions. [2021-11-19 14:02:59,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 10.666666666666666) internal successors, (192), 14 states have internal predecessors, (192), 8 states have call successors, (36), 5 states have call predecessors, (36), 10 states have return successors, (38), 12 states have call predecessors, (38), 7 states have call successors, (38) [2021-11-19 14:02:59,950 INFO L276 IsEmpty]: Start isEmpty. Operand 27852 states and 44843 transitions. [2021-11-19 14:02:59,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-11-19 14:02:59,956 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:02:59,956 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:02:59,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2021-11-19 14:03:00,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:03:00,165 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:03:00,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:03:00,165 INFO L85 PathProgramCache]: Analyzing trace with hash -2141526877, now seen corresponding path program 1 times [2021-11-19 14:03:00,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:03:00,166 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [560341519] [2021-11-19 14:03:00,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:03:00,166 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:03:00,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:03:00,167 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:03:00,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2021-11-19 14:03:00,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:03:00,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 1144 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-19 14:03:00,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:03:01,164 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-19 14:03:01,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:03:02,297 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-19 14:03:02,297 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:03:02,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [560341519] [2021-11-19 14:03:02,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [560341519] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:03:02,298 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:03:02,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 14 [2021-11-19 14:03:02,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614762076] [2021-11-19 14:03:02,299 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:03:02,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-19 14:03:02,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:03:02,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-19 14:03:02,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:03:02,300 INFO L87 Difference]: Start difference. First operand 27852 states and 44843 transitions. Second operand has 14 states, 14 states have (on average 13.142857142857142) internal successors, (184), 12 states have internal predecessors, (184), 7 states have call successors, (33), 5 states have call predecessors, (33), 6 states have return successors, (33), 9 states have call predecessors, (33), 6 states have call successors, (33) [2021-11-19 14:03:12,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:03:12,923 INFO L93 Difference]: Finished difference Result 76707 states and 124594 transitions. [2021-11-19 14:03:12,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-19 14:03:12,923 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 13.142857142857142) internal successors, (184), 12 states have internal predecessors, (184), 7 states have call successors, (33), 5 states have call predecessors, (33), 6 states have return successors, (33), 9 states have call predecessors, (33), 6 states have call successors, (33) Word has length 184 [2021-11-19 14:03:12,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:03:13,205 INFO L225 Difference]: With dead ends: 76707 [2021-11-19 14:03:13,206 INFO L226 Difference]: Without dead ends: 50104 [2021-11-19 14:03:13,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 358 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=179, Invalid=691, Unknown=0, NotChecked=0, Total=870 [2021-11-19 14:03:13,308 INFO L933 BasicCegarLoop]: 980 mSDtfsCounter, 3810 mSDsluCounter, 2283 mSDsCounter, 0 mSdLazyCounter, 6531 mSolverCounterSat, 1063 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3887 SdHoareTripleChecker+Valid, 3263 SdHoareTripleChecker+Invalid, 7594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1063 IncrementalHoareTripleChecker+Valid, 6531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:03:13,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3887 Valid, 3263 Invalid, 7594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1063 Valid, 6531 Invalid, 0 Unknown, 0 Unchecked, 6.7s Time] [2021-11-19 14:03:13,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50104 states. [2021-11-19 14:03:16,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50104 to 49306. [2021-11-19 14:03:16,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49306 states, 36021 states have (on average 1.511923600122151) internal successors, (54461), 37910 states have internal predecessors, (54461), 10281 states have call successors, (10281), 2291 states have call predecessors, (10281), 3003 states have return successors, (14284), 10054 states have call predecessors, (14284), 10277 states have call successors, (14284) [2021-11-19 14:03:17,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49306 states to 49306 states and 79026 transitions. [2021-11-19 14:03:17,195 INFO L78 Accepts]: Start accepts. Automaton has 49306 states and 79026 transitions. Word has length 184 [2021-11-19 14:03:17,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:03:17,196 INFO L470 AbstractCegarLoop]: Abstraction has 49306 states and 79026 transitions. [2021-11-19 14:03:17,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 13.142857142857142) internal successors, (184), 12 states have internal predecessors, (184), 7 states have call successors, (33), 5 states have call predecessors, (33), 6 states have return successors, (33), 9 states have call predecessors, (33), 6 states have call successors, (33) [2021-11-19 14:03:17,196 INFO L276 IsEmpty]: Start isEmpty. Operand 49306 states and 79026 transitions. [2021-11-19 14:03:17,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-11-19 14:03:17,200 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:03:17,200 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:03:17,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2021-11-19 14:03:17,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:03:17,401 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:03:17,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:03:17,402 INFO L85 PathProgramCache]: Analyzing trace with hash -257841439, now seen corresponding path program 1 times [2021-11-19 14:03:17,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:03:17,402 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [328781609] [2021-11-19 14:03:17,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:03:17,402 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:03:17,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:03:17,403 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:03:17,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2021-11-19 14:03:18,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:03:18,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 1151 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:03:18,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:03:18,341 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-19 14:03:18,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:03:18,946 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-19 14:03:18,947 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:03:18,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [328781609] [2021-11-19 14:03:18,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [328781609] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:03:18,947 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:03:18,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-19 14:03:18,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581665989] [2021-11-19 14:03:18,947 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:03:18,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:03:18,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:03:18,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:03:18,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:03:18,949 INFO L87 Difference]: Start difference. First operand 49306 states and 79026 transitions. Second operand has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 6 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) [2021-11-19 14:03:23,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:03:23,394 INFO L93 Difference]: Finished difference Result 99493 states and 161808 transitions. [2021-11-19 14:03:23,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:03:23,395 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 6 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) Word has length 191 [2021-11-19 14:03:23,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:03:23,735 INFO L225 Difference]: With dead ends: 99493 [2021-11-19 14:03:23,736 INFO L226 Difference]: Without dead ends: 49306 [2021-11-19 14:03:24,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 374 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:03:24,155 INFO L933 BasicCegarLoop]: 897 mSDtfsCounter, 662 mSDsluCounter, 2361 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 662 SdHoareTripleChecker+Valid, 3258 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:03:24,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [662 Valid, 3258 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:03:24,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49306 states. [2021-11-19 14:03:27,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49306 to 49306. [2021-11-19 14:03:27,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49306 states, 36021 states have (on average 1.4970989145220843) internal successors, (53927), 37910 states have internal predecessors, (53927), 10281 states have call successors, (10281), 2291 states have call predecessors, (10281), 3003 states have return successors, (14284), 10054 states have call predecessors, (14284), 10277 states have call successors, (14284) [2021-11-19 14:03:28,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49306 states to 49306 states and 78492 transitions. [2021-11-19 14:03:28,040 INFO L78 Accepts]: Start accepts. Automaton has 49306 states and 78492 transitions. Word has length 191 [2021-11-19 14:03:28,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:03:28,041 INFO L470 AbstractCegarLoop]: Abstraction has 49306 states and 78492 transitions. [2021-11-19 14:03:28,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 6 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) [2021-11-19 14:03:28,041 INFO L276 IsEmpty]: Start isEmpty. Operand 49306 states and 78492 transitions. [2021-11-19 14:03:28,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-11-19 14:03:28,047 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:03:28,047 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:03:28,063 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (47)] Ended with exit code 0 [2021-11-19 14:03:28,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:03:28,248 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:03:28,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:03:28,250 INFO L85 PathProgramCache]: Analyzing trace with hash -2036190020, now seen corresponding path program 1 times [2021-11-19 14:03:28,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:03:28,252 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1880287815] [2021-11-19 14:03:28,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:03:28,253 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:03:28,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:03:28,254 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:03:28,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc006bbd-497e-4d63-af9d-0690a060b1f7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2021-11-19 14:03:28,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:03:28,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 1160 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-19 14:03:28,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:03:29,130 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-19 14:03:29,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:03:29,886 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-19 14:03:29,886 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:03:29,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1880287815] [2021-11-19 14:03:29,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1880287815] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:03:29,887 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:03:29,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 9 [2021-11-19 14:03:29,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813663562] [2021-11-19 14:03:29,887 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:03:29,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 14:03:29,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:03:29,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 14:03:29,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:03:29,888 INFO L87 Difference]: Start difference. First operand 49306 states and 78492 transitions. Second operand has 9 states, 9 states have (on average 20.333333333333332) internal successors, (183), 9 states have internal predecessors, (183), 6 states have call successors, (35), 5 states have call predecessors, (35), 4 states have return successors, (33), 6 states have call predecessors, (33), 5 states have call successors, (33)