./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec8_product12.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec8_product12.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash cd09b7e02dd7459ada96201e9b5a915c0f0209c05135bf5a5174f874492a34ab --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:23:11,255 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:23:11,257 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:23:11,315 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:23:11,318 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:23:11,319 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:23:11,323 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:23:11,326 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:23:11,333 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:23:11,334 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:23:11,336 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:23:11,337 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:23:11,339 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:23:11,343 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:23:11,345 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:23:11,348 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:23:11,352 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:23:11,359 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:23:11,362 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:23:11,364 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:23:11,374 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:23:11,376 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:23:11,378 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:23:11,379 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:23:11,383 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:23:11,386 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:23:11,387 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:23:11,388 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:23:11,390 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:23:11,391 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:23:11,393 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:23:11,394 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:23:11,395 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:23:11,397 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:23:11,399 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:23:11,399 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:23:11,400 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:23:11,400 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:23:11,401 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:23:11,402 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:23:11,403 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:23:11,403 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 02:23:11,452 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:23:11,454 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:23:11,456 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:23:11,456 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:23:11,456 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:23:11,457 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:23:11,457 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 02:23:11,457 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:23:11,457 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:23:11,458 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 02:23:11,459 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 02:23:11,459 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:23:11,460 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 02:23:11,460 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 02:23:11,460 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 02:23:11,461 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:23:11,461 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:23:11,461 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 02:23:11,462 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:23:11,462 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:23:11,462 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:23:11,462 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:23:11,463 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:23:11,463 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:23:11,463 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:23:11,463 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:23:11,464 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:23:11,464 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:23:11,464 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:23:11,466 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:23:11,467 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:23:11,467 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:23:11,467 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:23:11,468 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:23:11,468 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 02:23:11,468 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 02:23:11,468 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:23:11,469 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:23:11,469 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:23:11,469 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_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cd09b7e02dd7459ada96201e9b5a915c0f0209c05135bf5a5174f874492a34ab [2021-11-07 02:23:11,742 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:23:11,781 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:23:11,784 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:23:11,785 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:23:11,786 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:23:11,787 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec8_product12.cil.c [2021-11-07 02:23:11,868 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/data/a65f5ee76/e3fff3db9be74d90ba18079de79f87df/FLAG701cae126 [2021-11-07 02:23:12,478 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:23:12,479 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/sv-benchmarks/c/product-lines/email_spec8_product12.cil.c [2021-11-07 02:23:12,515 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/data/a65f5ee76/e3fff3db9be74d90ba18079de79f87df/FLAG701cae126 [2021-11-07 02:23:12,703 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/data/a65f5ee76/e3fff3db9be74d90ba18079de79f87df [2021-11-07 02:23:12,705 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:23:12,707 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:23:12,709 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:23:12,709 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:23:12,712 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:23:12,713 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:23:12" (1/1) ... [2021-11-07 02:23:12,715 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@307696fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:23:12, skipping insertion in model container [2021-11-07 02:23:12,715 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:23:12" (1/1) ... [2021-11-07 02:23:12,722 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:23:12,784 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:23:13,209 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/sv-benchmarks/c/product-lines/email_spec8_product12.cil.c[16969,16982] [2021-11-07 02:23:13,433 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:23:13,447 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-07 02:23:13,448 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1267cc2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:23:13, skipping insertion in model container [2021-11-07 02:23:13,448 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:23:13,448 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 02:23:13,451 INFO L168 Benchmark]: Toolchain (without parser) took 742.38 ms. Allocated memory was 109.1 MB in the beginning and 132.1 MB in the end (delta: 23.1 MB). Free memory was 78.2 MB in the beginning and 95.1 MB in the end (delta: -16.8 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-07 02:23:13,452 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 109.1 MB. Free memory is still 66.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 02:23:13,453 INFO L168 Benchmark]: CACSL2BoogieTranslator took 739.54 ms. Allocated memory was 109.1 MB in the beginning and 132.1 MB in the end (delta: 23.1 MB). Free memory was 78.2 MB in the beginning and 95.1 MB in the end (delta: -16.8 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-07 02:23:13,455 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 109.1 MB. Free memory is still 66.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 739.54 ms. Allocated memory was 109.1 MB in the beginning and 132.1 MB in the end (delta: 23.1 MB). Free memory was 78.2 MB in the beginning and 95.1 MB in the end (delta: -16.8 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 77]: 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_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec8_product12.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash cd09b7e02dd7459ada96201e9b5a915c0f0209c05135bf5a5174f874492a34ab --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:23:15,836 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:23:15,839 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:23:15,898 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:23:15,899 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:23:15,904 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:23:15,906 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:23:15,910 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:23:15,914 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:23:15,922 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:23:15,924 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:23:15,925 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:23:15,926 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:23:15,929 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:23:15,931 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:23:15,936 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:23:15,937 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:23:15,939 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:23:15,941 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:23:15,949 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:23:15,952 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:23:15,953 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:23:15,956 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:23:15,958 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:23:15,968 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:23:15,968 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:23:15,969 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:23:15,971 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:23:15,972 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:23:15,973 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:23:15,974 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:23:15,975 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:23:15,977 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:23:15,978 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:23:15,980 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:23:15,980 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:23:15,981 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:23:15,981 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:23:15,982 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:23:15,984 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:23:15,985 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:23:15,986 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 02:23:16,030 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:23:16,030 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:23:16,032 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:23:16,032 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:23:16,032 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:23:16,033 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:23:16,033 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:23:16,033 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:23:16,033 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:23:16,035 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:23:16,036 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:23:16,037 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:23:16,037 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:23:16,037 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:23:16,037 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:23:16,038 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:23:16,038 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:23:16,038 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 02:23:16,038 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 02:23:16,039 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:23:16,039 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:23:16,039 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:23:16,039 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:23:16,040 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:23:16,040 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 02:23:16,040 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:23:16,040 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:23:16,041 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:23:16,041 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:23:16,041 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:23:16,041 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 02:23:16,042 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 02:23:16,042 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:23:16,042 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:23:16,043 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:23:16,043 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_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cd09b7e02dd7459ada96201e9b5a915c0f0209c05135bf5a5174f874492a34ab [2021-11-07 02:23:16,433 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:23:16,467 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:23:16,470 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:23:16,472 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:23:16,472 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:23:16,474 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec8_product12.cil.c [2021-11-07 02:23:16,546 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/data/4bd9626c2/7821ece7aa68486b94ae90bd97f81e1c/FLAGa36511e57 [2021-11-07 02:23:17,333 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:23:17,334 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/sv-benchmarks/c/product-lines/email_spec8_product12.cil.c [2021-11-07 02:23:17,358 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/data/4bd9626c2/7821ece7aa68486b94ae90bd97f81e1c/FLAGa36511e57 [2021-11-07 02:23:17,494 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/data/4bd9626c2/7821ece7aa68486b94ae90bd97f81e1c [2021-11-07 02:23:17,497 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:23:17,499 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:23:17,500 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:23:17,501 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:23:17,504 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:23:17,505 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:23:17" (1/1) ... [2021-11-07 02:23:17,507 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@790590a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:23:17, skipping insertion in model container [2021-11-07 02:23:17,507 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:23:17" (1/1) ... [2021-11-07 02:23:17,515 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:23:17,605 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:23:17,983 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/sv-benchmarks/c/product-lines/email_spec8_product12.cil.c[16969,16982] [2021-11-07 02:23:18,225 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:23:18,245 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 02:23:18,271 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:23:18,301 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/sv-benchmarks/c/product-lines/email_spec8_product12.cil.c[16969,16982] [2021-11-07 02:23:18,359 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:23:18,372 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 02:23:18,433 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/sv-benchmarks/c/product-lines/email_spec8_product12.cil.c[16969,16982] [2021-11-07 02:23:18,483 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:23:18,517 INFO L208 MainTranslator]: Completed translation [2021-11-07 02:23:18,518 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:23:18 WrapperNode [2021-11-07 02:23:18,518 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:23:18,519 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 02:23:18,519 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 02:23:18,520 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 02:23:18,527 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:23:18" (1/1) ... [2021-11-07 02:23:18,588 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:23:18" (1/1) ... [2021-11-07 02:23:18,696 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 02:23:18,697 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 02:23:18,697 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 02:23:18,697 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 02:23:18,725 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:23:18" (1/1) ... [2021-11-07 02:23:18,725 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:23:18" (1/1) ... [2021-11-07 02:23:18,732 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:23:18" (1/1) ... [2021-11-07 02:23:18,732 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:23:18" (1/1) ... [2021-11-07 02:23:18,766 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:23:18" (1/1) ... [2021-11-07 02:23:18,788 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:23:18" (1/1) ... [2021-11-07 02:23:18,796 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:23:18" (1/1) ... [2021-11-07 02:23:18,810 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 02:23:18,810 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 02:23:18,811 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 02:23:18,811 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 02:23:18,812 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:23:18" (1/1) ... [2021-11-07 02:23:18,818 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:23:18,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:23:18,844 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 02:23:18,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 02:23:18,918 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 02:23:18,918 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 02:23:18,919 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 02:23:18,919 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 02:23:18,919 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 02:23:23,045 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 02:23:23,045 INFO L299 CfgBuilder]: Removed 231 assume(true) statements. [2021-11-07 02:23:23,050 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:23:23 BoogieIcfgContainer [2021-11-07 02:23:23,052 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 02:23:23,054 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 02:23:23,054 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 02:23:23,057 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 02:23:23,057 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:23:17" (1/3) ... [2021-11-07 02:23:23,058 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e15bbda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:23:23, skipping insertion in model container [2021-11-07 02:23:23,058 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:23:18" (2/3) ... [2021-11-07 02:23:23,059 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e15bbda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:23:23, skipping insertion in model container [2021-11-07 02:23:23,059 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:23:23" (3/3) ... [2021-11-07 02:23:23,061 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec8_product12.cil.c [2021-11-07 02:23:23,067 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 02:23:23,067 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-07 02:23:23,137 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 02:23:23,146 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 02:23:23,147 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-07 02:23:23,182 INFO L276 IsEmpty]: Start isEmpty. Operand has 383 states, 380 states have (on average 1.7710526315789474) internal successors, (673), 382 states have internal predecessors, (673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:23,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-07 02:23:23,216 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:23:23,217 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:23:23,217 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:23:23,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:23:23,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1406579473, now seen corresponding path program 1 times [2021-11-07 02:23:23,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:23:23,237 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1872570070] [2021-11-07 02:23:23,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:23:23,238 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:23:23,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:23:23,242 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:23:23,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 02:23:23,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:23:23,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 02:23:23,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:23:23,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:23:23,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:23:24,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:23:24,020 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:23:24,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1872570070] [2021-11-07 02:23:24,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1872570070] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:23:24,022 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:23:24,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 02:23:24,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869254110] [2021-11-07 02:23:24,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 02:23:24,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:23:24,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 02:23:24,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 02:23:24,051 INFO L87 Difference]: Start difference. First operand has 383 states, 380 states have (on average 1.7710526315789474) internal successors, (673), 382 states have internal predecessors, (673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 20.5) internal successors, (41), 2 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:24,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:23:24,112 INFO L93 Difference]: Finished difference Result 528 states and 912 transitions. [2021-11-07 02:23:24,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 02:23:24,114 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 20.5) internal successors, (41), 2 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-07 02:23:24,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:23:24,128 INFO L225 Difference]: With dead ends: 528 [2021-11-07 02:23:24,128 INFO L226 Difference]: Without dead ends: 349 [2021-11-07 02:23:24,132 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 02:23:24,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-11-07 02:23:24,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 349. [2021-11-07 02:23:24,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 347 states have (on average 1.7636887608069165) internal successors, (612), 348 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:24,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 612 transitions. [2021-11-07 02:23:24,228 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 612 transitions. Word has length 41 [2021-11-07 02:23:24,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:23:24,230 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 612 transitions. [2021-11-07 02:23:24,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 20.5) internal successors, (41), 2 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:24,230 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 612 transitions. [2021-11-07 02:23:24,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-07 02:23:24,237 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:23:24,238 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:23:24,257 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-07 02:23:24,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:23:24,451 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:23:24,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:23:24,452 INFO L85 PathProgramCache]: Analyzing trace with hash -568777019, now seen corresponding path program 1 times [2021-11-07 02:23:24,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:23:24,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2091939249] [2021-11-07 02:23:24,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:23:24,454 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:23:24,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:23:24,459 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:23:24,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 02:23:24,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:23:24,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:23:24,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:23:24,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:23:24,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:23:25,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:23:25,086 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:23:25,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2091939249] [2021-11-07 02:23:25,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2091939249] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:23:25,088 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:23:25,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:23:25,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999951968] [2021-11-07 02:23:25,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:23:25,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:23:25,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:23:25,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:23:25,095 INFO L87 Difference]: Start difference. First operand 349 states and 612 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:25,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:23:25,234 INFO L93 Difference]: Finished difference Result 1017 states and 1788 transitions. [2021-11-07 02:23:25,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:23:25,235 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-11-07 02:23:25,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:23:25,243 INFO L225 Difference]: With dead ends: 1017 [2021-11-07 02:23:25,243 INFO L226 Difference]: Without dead ends: 683 [2021-11-07 02:23:25,249 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:23:25,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2021-11-07 02:23:25,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 348. [2021-11-07 02:23:25,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 346 states have (on average 1.754335260115607) internal successors, (607), 347 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:25,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 607 transitions. [2021-11-07 02:23:25,320 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 607 transitions. Word has length 42 [2021-11-07 02:23:25,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:23:25,321 INFO L470 AbstractCegarLoop]: Abstraction has 348 states and 607 transitions. [2021-11-07 02:23:25,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:25,322 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 607 transitions. [2021-11-07 02:23:25,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-07 02:23:25,334 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:23:25,334 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:23:25,358 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 02:23:25,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:23:25,561 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:23:25,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:23:25,562 INFO L85 PathProgramCache]: Analyzing trace with hash -364451297, now seen corresponding path program 1 times [2021-11-07 02:23:25,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:23:25,563 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1055360758] [2021-11-07 02:23:25,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:23:25,564 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:23:25,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:23:25,565 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:23:25,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 02:23:25,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:23:25,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:23:26,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:23:26,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:23:26,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:23:26,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:23:26,299 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:23:26,299 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1055360758] [2021-11-07 02:23:26,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1055360758] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:23:26,300 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:23:26,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:23:26,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818046133] [2021-11-07 02:23:26,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:23:26,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:23:26,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:23:26,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:23:26,302 INFO L87 Difference]: Start difference. First operand 348 states and 607 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:26,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:23:26,592 INFO L93 Difference]: Finished difference Result 1309 states and 2290 transitions. [2021-11-07 02:23:26,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:23:26,593 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-07 02:23:26,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:23:26,602 INFO L225 Difference]: With dead ends: 1309 [2021-11-07 02:23:26,602 INFO L226 Difference]: Without dead ends: 979 [2021-11-07 02:23:26,603 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:23:26,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 979 states. [2021-11-07 02:23:26,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 979 to 347. [2021-11-07 02:23:26,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 345 states have (on average 1.7478260869565216) internal successors, (603), 346 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:26,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 603 transitions. [2021-11-07 02:23:26,638 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 603 transitions. Word has length 44 [2021-11-07 02:23:26,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:23:26,638 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 603 transitions. [2021-11-07 02:23:26,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:26,640 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 603 transitions. [2021-11-07 02:23:26,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-07 02:23:26,641 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:23:26,642 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:23:26,657 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 02:23:26,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:23:26,855 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:23:26,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:23:26,856 INFO L85 PathProgramCache]: Analyzing trace with hash 529516012, now seen corresponding path program 1 times [2021-11-07 02:23:26,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:23:26,857 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1681681821] [2021-11-07 02:23:26,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:23:26,857 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:23:26,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:23:26,861 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:23:26,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 02:23:27,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:23:27,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:23:27,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:23:27,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:23:27,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:23:27,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:23:27,511 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:23:27,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1681681821] [2021-11-07 02:23:27,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1681681821] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:23:27,512 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:23:27,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:23:27,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165436441] [2021-11-07 02:23:27,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:23:27,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:23:27,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:23:27,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:23:27,515 INFO L87 Difference]: Start difference. First operand 347 states and 603 transitions. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:27,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:23:27,573 INFO L93 Difference]: Finished difference Result 691 states and 1203 transitions. [2021-11-07 02:23:27,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:23:27,574 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-07 02:23:27,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:23:27,577 INFO L225 Difference]: With dead ends: 691 [2021-11-07 02:23:27,577 INFO L226 Difference]: Without dead ends: 352 [2021-11-07 02:23:27,578 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:23:27,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-11-07 02:23:27,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 347. [2021-11-07 02:23:27,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 345 states have (on average 1.7391304347826086) internal successors, (600), 346 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:27,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 600 transitions. [2021-11-07 02:23:27,608 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 600 transitions. Word has length 45 [2021-11-07 02:23:27,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:23:27,609 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 600 transitions. [2021-11-07 02:23:27,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:27,609 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 600 transitions. [2021-11-07 02:23:27,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-07 02:23:27,611 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:23:27,611 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:23:27,629 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 02:23:27,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:23:27,825 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:23:27,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:23:27,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1405066185, now seen corresponding path program 1 times [2021-11-07 02:23:27,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:23:27,829 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1777227084] [2021-11-07 02:23:27,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:23:27,829 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:23:27,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:23:27,830 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:23:27,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 02:23:28,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:23:28,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:23:28,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:23:28,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:23:28,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:23:28,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:23:28,571 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:23:28,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1777227084] [2021-11-07 02:23:28,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1777227084] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:23:28,571 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:23:28,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:23:28,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969478232] [2021-11-07 02:23:28,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:23:28,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:23:28,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:23:28,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:23:28,578 INFO L87 Difference]: Start difference. First operand 347 states and 600 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:28,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:23:28,791 INFO L93 Difference]: Finished difference Result 1296 states and 2266 transitions. [2021-11-07 02:23:28,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:23:28,792 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-07 02:23:28,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:23:28,799 INFO L225 Difference]: With dead ends: 1296 [2021-11-07 02:23:28,799 INFO L226 Difference]: Without dead ends: 975 [2021-11-07 02:23:28,800 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:23:28,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2021-11-07 02:23:28,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 347. [2021-11-07 02:23:28,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 345 states have (on average 1.7304347826086957) internal successors, (597), 346 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:28,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 597 transitions. [2021-11-07 02:23:28,832 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 597 transitions. Word has length 46 [2021-11-07 02:23:28,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:23:28,833 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 597 transitions. [2021-11-07 02:23:28,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:28,833 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 597 transitions. [2021-11-07 02:23:28,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-07 02:23:28,835 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:23:28,835 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:23:28,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 02:23:29,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:23:29,049 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:23:29,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:23:29,049 INFO L85 PathProgramCache]: Analyzing trace with hash 491431836, now seen corresponding path program 1 times [2021-11-07 02:23:29,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:23:29,050 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1588949042] [2021-11-07 02:23:29,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:23:29,051 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:23:29,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:23:29,052 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:23:29,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 02:23:29,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:23:29,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:23:29,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:23:29,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:23:29,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:23:29,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:23:29,735 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:23:29,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1588949042] [2021-11-07 02:23:29,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1588949042] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:23:29,736 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:23:29,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:23:29,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674290875] [2021-11-07 02:23:29,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:23:29,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:23:29,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:23:29,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:23:29,738 INFO L87 Difference]: Start difference. First operand 347 states and 597 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:29,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:23:29,801 INFO L93 Difference]: Finished difference Result 779 states and 1345 transitions. [2021-11-07 02:23:29,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:23:29,802 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-11-07 02:23:29,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:23:29,806 INFO L225 Difference]: With dead ends: 779 [2021-11-07 02:23:29,807 INFO L226 Difference]: Without dead ends: 668 [2021-11-07 02:23:29,807 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:23:29,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2021-11-07 02:23:29,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 557. [2021-11-07 02:23:29,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 555 states have (on average 1.7675675675675675) internal successors, (981), 556 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:29,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 981 transitions. [2021-11-07 02:23:29,867 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 981 transitions. Word has length 48 [2021-11-07 02:23:29,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:23:29,867 INFO L470 AbstractCegarLoop]: Abstraction has 557 states and 981 transitions. [2021-11-07 02:23:29,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:29,868 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 981 transitions. [2021-11-07 02:23:29,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 02:23:29,869 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:23:29,870 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:23:29,894 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 02:23:30,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:23:30,087 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:23:30,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:23:30,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1953209013, now seen corresponding path program 1 times [2021-11-07 02:23:30,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:23:30,089 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1376246562] [2021-11-07 02:23:30,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:23:30,089 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:23:30,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:23:30,090 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:23:30,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 02:23:30,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:23:30,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:23:30,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:23:30,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:23:30,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:23:30,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:23:30,788 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:23:30,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1376246562] [2021-11-07 02:23:30,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1376246562] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:23:30,789 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:23:30,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:23:30,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047620937] [2021-11-07 02:23:30,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:23:30,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:23:30,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:23:30,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:23:30,791 INFO L87 Difference]: Start difference. First operand 557 states and 981 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:30,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:23:30,893 INFO L93 Difference]: Finished difference Result 1299 states and 2298 transitions. [2021-11-07 02:23:30,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:23:30,894 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-07 02:23:30,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:23:30,900 INFO L225 Difference]: With dead ends: 1299 [2021-11-07 02:23:30,900 INFO L226 Difference]: Without dead ends: 826 [2021-11-07 02:23:30,902 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:23:30,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 826 states. [2021-11-07 02:23:30,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 826 to 715. [2021-11-07 02:23:30,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 715 states, 713 states have (on average 1.7784011220196354) internal successors, (1268), 714 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:30,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 715 states to 715 states and 1268 transitions. [2021-11-07 02:23:30,965 INFO L78 Accepts]: Start accepts. Automaton has 715 states and 1268 transitions. Word has length 60 [2021-11-07 02:23:30,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:23:30,965 INFO L470 AbstractCegarLoop]: Abstraction has 715 states and 1268 transitions. [2021-11-07 02:23:30,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:30,966 INFO L276 IsEmpty]: Start isEmpty. Operand 715 states and 1268 transitions. [2021-11-07 02:23:30,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-07 02:23:30,967 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:23:30,968 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:23:30,985 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 02:23:31,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:23:31,182 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:23:31,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:23:31,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1132597812, now seen corresponding path program 1 times [2021-11-07 02:23:31,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:23:31,184 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1861367552] [2021-11-07 02:23:31,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:23:31,184 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:23:31,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:23:31,185 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:23:31,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 02:23:31,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:23:31,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:23:31,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:23:31,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:23:31,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:23:31,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:23:31,957 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:23:31,957 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1861367552] [2021-11-07 02:23:31,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1861367552] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:23:31,957 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:23:31,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:23:31,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340657140] [2021-11-07 02:23:31,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:23:31,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:23:31,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:23:31,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:23:31,959 INFO L87 Difference]: Start difference. First operand 715 states and 1268 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:32,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:23:32,063 INFO L93 Difference]: Finished difference Result 1817 states and 3245 transitions. [2021-11-07 02:23:32,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:23:32,063 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-07 02:23:32,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:23:32,072 INFO L225 Difference]: With dead ends: 1817 [2021-11-07 02:23:32,072 INFO L226 Difference]: Without dead ends: 1190 [2021-11-07 02:23:32,073 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:23:32,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1190 states. [2021-11-07 02:23:32,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1190 to 1079. [2021-11-07 02:23:32,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1079 states, 1077 states have (on average 1.7938718662952646) internal successors, (1932), 1078 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:32,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1079 states to 1079 states and 1932 transitions. [2021-11-07 02:23:32,160 INFO L78 Accepts]: Start accepts. Automaton has 1079 states and 1932 transitions. Word has length 61 [2021-11-07 02:23:32,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:23:32,160 INFO L470 AbstractCegarLoop]: Abstraction has 1079 states and 1932 transitions. [2021-11-07 02:23:32,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:32,161 INFO L276 IsEmpty]: Start isEmpty. Operand 1079 states and 1932 transitions. [2021-11-07 02:23:32,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-07 02:23:32,163 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:23:32,163 INFO L513 BasicCegarLoop]: trace histogram [3, 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] [2021-11-07 02:23:32,186 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 02:23:32,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:23:32,385 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:23:32,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:23:32,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1221111356, now seen corresponding path program 1 times [2021-11-07 02:23:32,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:23:32,387 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [565295495] [2021-11-07 02:23:32,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:23:32,387 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:23:32,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:23:32,388 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:23:32,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 02:23:32,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:23:32,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:23:32,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:23:33,068 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:23:33,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:23:33,219 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:23:33,220 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:23:33,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [565295495] [2021-11-07 02:23:33,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [565295495] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:23:33,220 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:23:33,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:23:33,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262707445] [2021-11-07 02:23:33,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:23:33,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:23:33,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:23:33,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:23:33,223 INFO L87 Difference]: Start difference. First operand 1079 states and 1932 transitions. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:33,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:23:33,369 INFO L93 Difference]: Finished difference Result 2027 states and 3626 transitions. [2021-11-07 02:23:33,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:23:33,370 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-07 02:23:33,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:23:33,377 INFO L225 Difference]: With dead ends: 2027 [2021-11-07 02:23:33,378 INFO L226 Difference]: Without dead ends: 1190 [2021-11-07 02:23:33,386 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:23:33,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1190 states. [2021-11-07 02:23:33,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1190 to 1079. [2021-11-07 02:23:33,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1079 states, 1077 states have (on average 1.7920148560817084) internal successors, (1930), 1078 states have internal predecessors, (1930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:33,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1079 states to 1079 states and 1930 transitions. [2021-11-07 02:23:33,476 INFO L78 Accepts]: Start accepts. Automaton has 1079 states and 1930 transitions. Word has length 62 [2021-11-07 02:23:33,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:23:33,477 INFO L470 AbstractCegarLoop]: Abstraction has 1079 states and 1930 transitions. [2021-11-07 02:23:33,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:33,477 INFO L276 IsEmpty]: Start isEmpty. Operand 1079 states and 1930 transitions. [2021-11-07 02:23:33,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-07 02:23:33,479 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:23:33,480 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:23:33,498 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 02:23:33,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:23:33,694 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:23:33,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:23:33,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1210001443, now seen corresponding path program 1 times [2021-11-07 02:23:33,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:23:33,695 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [450522069] [2021-11-07 02:23:33,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:23:33,696 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:23:33,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:23:33,697 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:23:33,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 02:23:34,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:23:34,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:23:34,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:23:34,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:23:34,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:23:34,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:23:34,544 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:23:34,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [450522069] [2021-11-07 02:23:34,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [450522069] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:23:34,545 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:23:34,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:23:34,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202609978] [2021-11-07 02:23:34,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:23:34,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:23:34,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:23:34,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:23:34,546 INFO L87 Difference]: Start difference. First operand 1079 states and 1930 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:34,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:23:34,701 INFO L93 Difference]: Finished difference Result 2881 states and 5186 transitions. [2021-11-07 02:23:34,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:23:34,702 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-07 02:23:34,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:23:34,715 INFO L225 Difference]: With dead ends: 2881 [2021-11-07 02:23:34,715 INFO L226 Difference]: Without dead ends: 1898 [2021-11-07 02:23:34,716 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:23:34,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1898 states. [2021-11-07 02:23:34,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1898 to 1787. [2021-11-07 02:23:34,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1787 states, 1785 states have (on average 1.8044817927170869) internal successors, (3221), 1786 states have internal predecessors, (3221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:34,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1787 states to 1787 states and 3221 transitions. [2021-11-07 02:23:34,842 INFO L78 Accepts]: Start accepts. Automaton has 1787 states and 3221 transitions. Word has length 62 [2021-11-07 02:23:34,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:23:34,843 INFO L470 AbstractCegarLoop]: Abstraction has 1787 states and 3221 transitions. [2021-11-07 02:23:34,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:34,843 INFO L276 IsEmpty]: Start isEmpty. Operand 1787 states and 3221 transitions. [2021-11-07 02:23:34,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-07 02:23:34,846 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:23:34,847 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:23:34,866 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 02:23:35,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:23:35,061 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:23:35,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:23:35,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1842317750, now seen corresponding path program 1 times [2021-11-07 02:23:35,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:23:35,062 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1712412303] [2021-11-07 02:23:35,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:23:35,062 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:23:35,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:23:35,063 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:23:35,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 02:23:35,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:23:35,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:23:35,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:23:35,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:23:35,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:23:35,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:23:35,885 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:23:35,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1712412303] [2021-11-07 02:23:35,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1712412303] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:23:35,886 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:23:35,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:23:35,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711179747] [2021-11-07 02:23:35,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:23:35,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:23:35,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:23:35,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:23:35,887 INFO L87 Difference]: Start difference. First operand 1787 states and 3221 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:36,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:23:36,080 INFO L93 Difference]: Finished difference Result 4741 states and 8578 transitions. [2021-11-07 02:23:36,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:23:36,081 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-07 02:23:36,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:23:36,100 INFO L225 Difference]: With dead ends: 4741 [2021-11-07 02:23:36,101 INFO L226 Difference]: Without dead ends: 3084 [2021-11-07 02:23:36,105 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:23:36,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3084 states. [2021-11-07 02:23:36,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3084 to 2973. [2021-11-07 02:23:36,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2973 states, 2971 states have (on average 1.8101649276337934) internal successors, (5378), 2972 states have internal predecessors, (5378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:36,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2973 states to 2973 states and 5378 transitions. [2021-11-07 02:23:36,357 INFO L78 Accepts]: Start accepts. Automaton has 2973 states and 5378 transitions. Word has length 63 [2021-11-07 02:23:36,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:23:36,359 INFO L470 AbstractCegarLoop]: Abstraction has 2973 states and 5378 transitions. [2021-11-07 02:23:36,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:36,359 INFO L276 IsEmpty]: Start isEmpty. Operand 2973 states and 5378 transitions. [2021-11-07 02:23:36,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 02:23:36,368 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:23:36,369 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:23:36,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 02:23:36,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:23:36,583 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:23:36,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:23:36,584 INFO L85 PathProgramCache]: Analyzing trace with hash -280831764, now seen corresponding path program 1 times [2021-11-07 02:23:36,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:23:36,584 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2076510250] [2021-11-07 02:23:36,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:23:36,584 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:23:36,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:23:36,585 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:23:36,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 02:23:37,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:23:37,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:23:37,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:23:37,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:23:37,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:23:37,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:23:37,408 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:23:37,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2076510250] [2021-11-07 02:23:37,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2076510250] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:23:37,408 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:23:37,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:23:37,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115647718] [2021-11-07 02:23:37,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:23:37,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:23:37,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:23:37,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:23:37,409 INFO L87 Difference]: Start difference. First operand 2973 states and 5378 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:37,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:23:37,715 INFO L93 Difference]: Finished difference Result 8015 states and 14532 transitions. [2021-11-07 02:23:37,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:23:37,716 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-07 02:23:37,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:23:37,749 INFO L225 Difference]: With dead ends: 8015 [2021-11-07 02:23:37,749 INFO L226 Difference]: Without dead ends: 5206 [2021-11-07 02:23:37,753 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:23:37,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5206 states. [2021-11-07 02:23:38,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5206 to 5095. [2021-11-07 02:23:38,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5095 states, 5093 states have (on average 1.8117023365403495) internal successors, (9227), 5094 states have internal predecessors, (9227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:38,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5095 states to 5095 states and 9227 transitions. [2021-11-07 02:23:38,157 INFO L78 Accepts]: Start accepts. Automaton has 5095 states and 9227 transitions. Word has length 64 [2021-11-07 02:23:38,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:23:38,157 INFO L470 AbstractCegarLoop]: Abstraction has 5095 states and 9227 transitions. [2021-11-07 02:23:38,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:38,158 INFO L276 IsEmpty]: Start isEmpty. Operand 5095 states and 9227 transitions. [2021-11-07 02:23:38,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 02:23:38,162 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:23:38,162 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:23:38,180 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 02:23:38,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:23:38,377 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:23:38,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:23:38,379 INFO L85 PathProgramCache]: Analyzing trace with hash 688042344, now seen corresponding path program 1 times [2021-11-07 02:23:38,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:23:38,380 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1718873042] [2021-11-07 02:23:38,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:23:38,380 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:23:38,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:23:38,381 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:23:38,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 02:23:38,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:23:38,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:23:38,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:23:39,089 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 02:23:39,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:23:39,292 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 02:23:39,292 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:23:39,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1718873042] [2021-11-07 02:23:39,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1718873042] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:23:39,293 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:23:39,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:23:39,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238933277] [2021-11-07 02:23:39,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:23:39,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:23:39,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:23:39,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:23:39,294 INFO L87 Difference]: Start difference. First operand 5095 states and 9227 transitions. Second operand has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:42,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:23:42,268 INFO L93 Difference]: Finished difference Result 19032 states and 34510 transitions. [2021-11-07 02:23:42,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 02:23:42,272 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-07 02:23:42,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:23:42,336 INFO L225 Difference]: With dead ends: 19032 [2021-11-07 02:23:42,337 INFO L226 Difference]: Without dead ends: 14177 [2021-11-07 02:23:42,346 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:23:42,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14177 states. [2021-11-07 02:23:42,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14177 to 5045. [2021-11-07 02:23:42,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5045 states, 5043 states have (on average 1.7900059488399762) internal successors, (9027), 5044 states have internal predecessors, (9027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:42,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5045 states to 5045 states and 9027 transitions. [2021-11-07 02:23:42,873 INFO L78 Accepts]: Start accepts. Automaton has 5045 states and 9027 transitions. Word has length 65 [2021-11-07 02:23:42,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:23:42,873 INFO L470 AbstractCegarLoop]: Abstraction has 5045 states and 9027 transitions. [2021-11-07 02:23:42,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:42,874 INFO L276 IsEmpty]: Start isEmpty. Operand 5045 states and 9027 transitions. [2021-11-07 02:23:42,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 02:23:42,878 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:23:42,878 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:23:42,897 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 02:23:43,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:23:43,093 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:23:43,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:23:43,093 INFO L85 PathProgramCache]: Analyzing trace with hash 1013284153, now seen corresponding path program 1 times [2021-11-07 02:23:43,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:23:43,095 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [802253187] [2021-11-07 02:23:43,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:23:43,096 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:23:43,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:23:43,096 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:23:43,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 02:23:43,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:23:43,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:23:43,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:23:43,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:23:43,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:23:44,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:23:44,086 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:23:44,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [802253187] [2021-11-07 02:23:44,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [802253187] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:23:44,086 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:23:44,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:23:44,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747697597] [2021-11-07 02:23:44,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:23:44,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:23:44,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:23:44,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:23:44,087 INFO L87 Difference]: Start difference. First operand 5045 states and 9027 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:44,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:23:44,573 INFO L93 Difference]: Finished difference Result 14692 states and 26333 transitions. [2021-11-07 02:23:44,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:23:44,573 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-07 02:23:44,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:23:44,599 INFO L225 Difference]: With dead ends: 14692 [2021-11-07 02:23:44,600 INFO L226 Difference]: Without dead ends: 9814 [2021-11-07 02:23:44,608 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:23:44,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9814 states. [2021-11-07 02:23:45,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9814 to 9703. [2021-11-07 02:23:45,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9703 states, 9701 states have (on average 1.7899185650963818) internal successors, (17364), 9702 states have internal predecessors, (17364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:45,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9703 states to 9703 states and 17364 transitions. [2021-11-07 02:23:45,222 INFO L78 Accepts]: Start accepts. Automaton has 9703 states and 17364 transitions. Word has length 65 [2021-11-07 02:23:45,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:23:45,223 INFO L470 AbstractCegarLoop]: Abstraction has 9703 states and 17364 transitions. [2021-11-07 02:23:45,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:45,223 INFO L276 IsEmpty]: Start isEmpty. Operand 9703 states and 17364 transitions. [2021-11-07 02:23:45,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 02:23:45,272 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:23:45,272 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:23:45,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 02:23:45,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:23:45,473 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:23:45,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:23:45,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1829810483, now seen corresponding path program 1 times [2021-11-07 02:23:45,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:23:45,474 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [746948702] [2021-11-07 02:23:45,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:23:45,475 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:23:45,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:23:45,475 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:23:45,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 02:23:46,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:23:46,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:23:46,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:23:46,253 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:23:46,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:23:46,440 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:23:46,441 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:23:46,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [746948702] [2021-11-07 02:23:46,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [746948702] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:23:46,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [292578134] [2021-11-07 02:23:46,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:23:46,442 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:23:46,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:23:46,443 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:23:46,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-07 02:23:47,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:23:47,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:23:47,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:23:47,425 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:23:47,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:23:47,644 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:23:47,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [292578134] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:23:47,644 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:23:47,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5, 5] total 9 [2021-11-07 02:23:47,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313030514] [2021-11-07 02:23:47,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:23:47,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:23:47,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:23:47,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:23:47,646 INFO L87 Difference]: Start difference. First operand 9703 states and 17364 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 2 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:48,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:23:48,220 INFO L93 Difference]: Finished difference Result 9772 states and 17475 transitions. [2021-11-07 02:23:48,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:23:48,221 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 2 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-07 02:23:48,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:23:48,242 INFO L225 Difference]: With dead ends: 9772 [2021-11-07 02:23:48,243 INFO L226 Difference]: Without dead ends: 9697 [2021-11-07 02:23:48,248 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:23:48,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9697 states. [2021-11-07 02:23:48,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9697 to 9697. [2021-11-07 02:23:48,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9697 states, 9696 states have (on average 1.7899133663366336) internal successors, (17355), 9696 states have internal predecessors, (17355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:48,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9697 states to 9697 states and 17355 transitions. [2021-11-07 02:23:48,954 INFO L78 Accepts]: Start accepts. Automaton has 9697 states and 17355 transitions. Word has length 66 [2021-11-07 02:23:48,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:23:48,954 INFO L470 AbstractCegarLoop]: Abstraction has 9697 states and 17355 transitions. [2021-11-07 02:23:48,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 2 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:48,955 INFO L276 IsEmpty]: Start isEmpty. Operand 9697 states and 17355 transitions. [2021-11-07 02:23:48,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-07 02:23:48,974 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:23:48,974 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:23:48,986 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 02:23:49,182 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-07 02:23:49,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:23:49,380 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:23:49,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:23:49,380 INFO L85 PathProgramCache]: Analyzing trace with hash 572714735, now seen corresponding path program 1 times [2021-11-07 02:23:49,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:23:49,381 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [230247390] [2021-11-07 02:23:49,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:23:49,381 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:23:49,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:23:49,382 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:23:49,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 02:23:50,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:23:50,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 566 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:23:50,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:23:50,255 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:23:50,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:23:50,530 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:23:50,530 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:23:50,530 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [230247390] [2021-11-07 02:23:50,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [230247390] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:23:50,530 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1913626621] [2021-11-07 02:23:50,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:23:50,530 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:23:50,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:23:50,531 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:23:50,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-07 02:23:51,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:23:51,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 566 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 02:23:51,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:23:52,044 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:23:52,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:23:52,450 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:23:52,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1913626621] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:23:52,450 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:23:52,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5] total 22 [2021-11-07 02:23:52,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140721039] [2021-11-07 02:23:52,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 02:23:52,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:23:52,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 02:23:52,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-11-07 02:23:52,453 INFO L87 Difference]: Start difference. First operand 9697 states and 17355 transitions. Second operand has 16 states, 16 states have (on average 8.4375) internal successors, (135), 15 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:14,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:24:14,141 INFO L93 Difference]: Finished difference Result 19836 states and 35407 transitions. [2021-11-07 02:24:14,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 02:24:14,141 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 8.4375) internal successors, (135), 15 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-11-07 02:24:14,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:24:14,243 INFO L225 Difference]: With dead ends: 19836 [2021-11-07 02:24:14,244 INFO L226 Difference]: Without dead ends: 19751 [2021-11-07 02:24:14,248 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 348 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=212, Invalid=718, Unknown=0, NotChecked=0, Total=930 [2021-11-07 02:24:14,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19751 states. [2021-11-07 02:24:15,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19751 to 19202. [2021-11-07 02:24:15,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19202 states, 19201 states have (on average 1.7912608718295921) internal successors, (34394), 19201 states have internal predecessors, (34394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:15,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19202 states to 19202 states and 34394 transitions. [2021-11-07 02:24:15,370 INFO L78 Accepts]: Start accepts. Automaton has 19202 states and 34394 transitions. Word has length 93 [2021-11-07 02:24:15,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:24:15,371 INFO L470 AbstractCegarLoop]: Abstraction has 19202 states and 34394 transitions. [2021-11-07 02:24:15,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 8.4375) internal successors, (135), 15 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:15,371 INFO L276 IsEmpty]: Start isEmpty. Operand 19202 states and 34394 transitions. [2021-11-07 02:24:15,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-07 02:24:15,409 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:24:15,410 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:24:15,418 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-11-07 02:24:15,624 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-11-07 02:24:15,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:24:15,815 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:24:15,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:24:15,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1982989744, now seen corresponding path program 1 times [2021-11-07 02:24:15,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:24:15,816 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1511064287] [2021-11-07 02:24:15,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:24:15,816 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:24:15,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:24:15,817 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:24:15,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 02:24:16,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:24:16,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:24:16,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:24:16,769 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:24:16,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:24:17,028 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:24:17,028 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:24:17,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1511064287] [2021-11-07 02:24:17,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1511064287] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:24:17,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [820910876] [2021-11-07 02:24:17,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:24:17,029 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:24:17,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:24:17,038 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:24:17,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-07 02:24:18,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:24:18,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:24:18,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:24:18,223 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:24:18,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:24:18,411 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:24:18,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [820910876] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:24:18,412 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:24:18,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 10 [2021-11-07 02:24:18,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711932058] [2021-11-07 02:24:18,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:24:18,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:24:18,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:24:18,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:24:18,414 INFO L87 Difference]: Start difference. First operand 19202 states and 34394 transitions. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:19,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:24:19,228 INFO L93 Difference]: Finished difference Result 19301 states and 34556 transitions. [2021-11-07 02:24:19,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:24:19,229 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2021-11-07 02:24:19,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:24:19,266 INFO L225 Difference]: With dead ends: 19301 [2021-11-07 02:24:19,267 INFO L226 Difference]: Without dead ends: 19201 [2021-11-07 02:24:19,271 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 364 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-07 02:24:19,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19201 states. [2021-11-07 02:24:20,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19201 to 19201. [2021-11-07 02:24:20,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19201 states, 19200 states have (on average 1.7911458333333334) internal successors, (34390), 19200 states have internal predecessors, (34390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:20,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19201 states to 19201 states and 34390 transitions. [2021-11-07 02:24:20,619 INFO L78 Accepts]: Start accepts. Automaton has 19201 states and 34390 transitions. Word has length 94 [2021-11-07 02:24:20,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:24:20,620 INFO L470 AbstractCegarLoop]: Abstraction has 19201 states and 34390 transitions. [2021-11-07 02:24:20,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:20,620 INFO L276 IsEmpty]: Start isEmpty. Operand 19201 states and 34390 transitions. [2021-11-07 02:24:20,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-07 02:24:20,654 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:24:20,655 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:24:20,673 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-11-07 02:24:20,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-07 02:24:21,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:24:21,073 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:24:21,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:24:21,074 INFO L85 PathProgramCache]: Analyzing trace with hash 130436394, now seen corresponding path program 1 times [2021-11-07 02:24:21,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:24:21,075 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1644420866] [2021-11-07 02:24:21,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:24:21,075 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:24:21,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:24:21,076 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:24:21,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-07 02:24:21,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:24:21,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:24:21,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:24:22,107 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:24:22,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:24:22,348 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:24:22,348 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:24:22,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1644420866] [2021-11-07 02:24:22,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1644420866] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:24:22,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1007875994] [2021-11-07 02:24:22,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:24:22,349 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:24:22,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:24:22,349 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:24:22,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-07 02:24:23,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:24:23,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 02:24:23,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:24:23,975 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:24:23,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:24:24,353 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:24:24,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1007875994] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:24:24,353 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:24:24,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5] total 22 [2021-11-07 02:24:24,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315137819] [2021-11-07 02:24:24,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 02:24:24,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:24:24,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 02:24:24,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-11-07 02:24:24,356 INFO L87 Difference]: Start difference. First operand 19201 states and 34390 transitions. Second operand has 16 states, 16 states have (on average 8.625) internal successors, (138), 15 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:42,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:24:42,652 INFO L93 Difference]: Finished difference Result 38902 states and 69552 transitions. [2021-11-07 02:24:42,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 02:24:42,662 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 8.625) internal successors, (138), 15 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-11-07 02:24:42,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:24:42,736 INFO L225 Difference]: With dead ends: 38902 [2021-11-07 02:24:42,736 INFO L226 Difference]: Without dead ends: 38762 [2021-11-07 02:24:42,744 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 356 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=195, Invalid=675, Unknown=0, NotChecked=0, Total=870 [2021-11-07 02:24:42,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38762 states. [2021-11-07 02:24:44,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38762 to 38130. [2021-11-07 02:24:44,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38130 states, 38129 states have (on average 1.7919169136352908) internal successors, (68324), 38129 states have internal predecessors, (68324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:44,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38130 states to 38130 states and 68324 transitions. [2021-11-07 02:24:44,705 INFO L78 Accepts]: Start accepts. Automaton has 38130 states and 68324 transitions. Word has length 95 [2021-11-07 02:24:44,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:24:44,705 INFO L470 AbstractCegarLoop]: Abstraction has 38130 states and 68324 transitions. [2021-11-07 02:24:44,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 8.625) internal successors, (138), 15 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:44,706 INFO L276 IsEmpty]: Start isEmpty. Operand 38130 states and 68324 transitions. [2021-11-07 02:24:44,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-07 02:24:44,762 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:24:44,763 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:24:44,768 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (23)] Ended with exit code 0 [2021-11-07 02:24:44,979 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2021-11-07 02:24:45,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:24:45,168 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:24:45,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:24:45,168 INFO L85 PathProgramCache]: Analyzing trace with hash 554083116, now seen corresponding path program 1 times [2021-11-07 02:24:45,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:24:45,169 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [656582632] [2021-11-07 02:24:45,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:24:45,169 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:24:45,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:24:45,170 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:24:45,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-07 02:24:46,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:24:46,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:24:46,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:24:46,296 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:24:46,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:24:46,542 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:24:46,542 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:24:46,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [656582632] [2021-11-07 02:24:46,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [656582632] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:24:46,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [412538305] [2021-11-07 02:24:46,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:24:46,543 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:24:46,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:24:46,544 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:24:46,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-11-07 02:24:47,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:24:47,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:24:47,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:24:48,047 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:24:48,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:24:48,323 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:24:48,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [412538305] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:24:48,323 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:24:48,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 11 [2021-11-07 02:24:48,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651713909] [2021-11-07 02:24:48,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:24:48,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:24:48,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:24:48,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-07 02:24:48,325 INFO L87 Difference]: Start difference. First operand 38130 states and 68324 transitions. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:50,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:24:50,245 INFO L93 Difference]: Finished difference Result 39165 states and 69943 transitions. [2021-11-07 02:24:50,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 02:24:50,246 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-11-07 02:24:50,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:24:50,316 INFO L225 Difference]: With dead ends: 39165 [2021-11-07 02:24:50,316 INFO L226 Difference]: Without dead ends: 38603 [2021-11-07 02:24:50,325 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 367 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-11-07 02:24:50,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38603 states. [2021-11-07 02:24:52,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38603 to 38186. [2021-11-07 02:24:52,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38186 states, 38185 states have (on average 1.791384051329056) internal successors, (68404), 38185 states have internal predecessors, (68404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:52,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38186 states to 38186 states and 68404 transitions. [2021-11-07 02:24:52,391 INFO L78 Accepts]: Start accepts. Automaton has 38186 states and 68404 transitions. Word has length 95 [2021-11-07 02:24:52,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:24:52,391 INFO L470 AbstractCegarLoop]: Abstraction has 38186 states and 68404 transitions. [2021-11-07 02:24:52,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:52,392 INFO L276 IsEmpty]: Start isEmpty. Operand 38186 states and 68404 transitions. [2021-11-07 02:24:52,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-07 02:24:52,423 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:24:52,423 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:24:52,428 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2021-11-07 02:24:52,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-07 02:24:52,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:24:52,824 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:24:52,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:24:52,825 INFO L85 PathProgramCache]: Analyzing trace with hash 1581852817, now seen corresponding path program 1 times [2021-11-07 02:24:52,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:24:52,825 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2067880576] [2021-11-07 02:24:52,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:24:52,826 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:24:52,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:24:52,827 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:24:52,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-07 02:24:53,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:24:53,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 569 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:24:53,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:24:54,025 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:24:54,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:24:54,267 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:24:54,267 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:24:54,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2067880576] [2021-11-07 02:24:54,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2067880576] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:24:54,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [612784318] [2021-11-07 02:24:54,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:24:54,267 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:24:54,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:24:54,268 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:24:54,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-11-07 02:24:55,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:24:55,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 569 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-07 02:24:55,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:24:55,890 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:24:55,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:24:56,102 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:24:56,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [612784318] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:24:56,102 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:24:56,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5] total 14 [2021-11-07 02:24:56,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921954991] [2021-11-07 02:24:56,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:24:56,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:24:56,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:24:56,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-11-07 02:24:56,105 INFO L87 Difference]: Start difference. First operand 38186 states and 68404 transitions. Second operand has 8 states, 8 states have (on average 11.25) internal successors, (90), 8 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:57,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:24:57,782 INFO L93 Difference]: Finished difference Result 38474 states and 68852 transitions. [2021-11-07 02:24:57,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 02:24:57,782 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.25) internal successors, (90), 8 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-11-07 02:24:57,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:24:57,838 INFO L225 Difference]: With dead ends: 38474 [2021-11-07 02:24:57,838 INFO L226 Difference]: Without dead ends: 38247 [2021-11-07 02:24:57,846 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 368 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2021-11-07 02:24:57,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38247 states. [2021-11-07 02:25:00,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38247 to 38122. [2021-11-07 02:25:00,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38122 states, 38121 states have (on average 1.791558458592377) internal successors, (68296), 38121 states have internal predecessors, (68296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:00,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38122 states to 38122 states and 68296 transitions. [2021-11-07 02:25:00,279 INFO L78 Accepts]: Start accepts. Automaton has 38122 states and 68296 transitions. Word has length 96 [2021-11-07 02:25:00,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:25:00,280 INFO L470 AbstractCegarLoop]: Abstraction has 38122 states and 68296 transitions. [2021-11-07 02:25:00,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.25) internal successors, (90), 8 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:00,280 INFO L276 IsEmpty]: Start isEmpty. Operand 38122 states and 68296 transitions. [2021-11-07 02:25:00,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-07 02:25:00,324 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:25:00,324 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:25:00,342 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2021-11-07 02:25:00,546 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2021-11-07 02:25:00,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:25:00,742 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:25:00,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:25:00,742 INFO L85 PathProgramCache]: Analyzing trace with hash 324754421, now seen corresponding path program 1 times [2021-11-07 02:25:00,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:25:00,743 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [622778684] [2021-11-07 02:25:00,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:25:00,743 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:25:00,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:25:00,744 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:25:00,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-07 02:25:01,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:25:01,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:25:01,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:25:02,052 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:25:02,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:25:02,326 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:25:02,327 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:25:02,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [622778684] [2021-11-07 02:25:02,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [622778684] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:25:02,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [691329704] [2021-11-07 02:25:02,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:25:02,327 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:25:02,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:25:02,329 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:25:02,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-11-07 02:25:03,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:25:03,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:25:03,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:25:03,976 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:25:03,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:25:04,188 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:25:04,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [691329704] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:25:04,189 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:25:04,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 10 [2021-11-07 02:25:04,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412585458] [2021-11-07 02:25:04,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:25:04,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:25:04,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:25:04,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:25:04,191 INFO L87 Difference]: Start difference. First operand 38122 states and 68296 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:05,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:25:05,814 INFO L93 Difference]: Finished difference Result 38397 states and 68713 transitions. [2021-11-07 02:25:05,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:25:05,815 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2021-11-07 02:25:05,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:25:05,868 INFO L225 Difference]: With dead ends: 38397 [2021-11-07 02:25:05,868 INFO L226 Difference]: Without dead ends: 38151 [2021-11-07 02:25:05,877 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 380 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-07 02:25:05,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38151 states. [2021-11-07 02:25:08,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38151 to 38121. [2021-11-07 02:25:08,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38121 states, 38120 states have (on average 1.7911070304302203) internal successors, (68277), 38120 states have internal predecessors, (68277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:08,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38121 states to 38121 states and 68277 transitions. [2021-11-07 02:25:08,123 INFO L78 Accepts]: Start accepts. Automaton has 38121 states and 68277 transitions. Word has length 98 [2021-11-07 02:25:08,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:25:08,123 INFO L470 AbstractCegarLoop]: Abstraction has 38121 states and 68277 transitions. [2021-11-07 02:25:08,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:08,124 INFO L276 IsEmpty]: Start isEmpty. Operand 38121 states and 68277 transitions. [2021-11-07 02:25:08,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-07 02:25:08,175 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:25:08,176 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:25:08,182 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2021-11-07 02:25:08,393 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-07 02:25:08,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:25:08,582 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:25:08,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:25:08,582 INFO L85 PathProgramCache]: Analyzing trace with hash -425663637, now seen corresponding path program 1 times [2021-11-07 02:25:08,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:25:08,583 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [667637263] [2021-11-07 02:25:08,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:25:08,583 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:25:08,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:25:08,587 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:25:08,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-07 02:25:09,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:25:09,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:25:09,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:25:09,983 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:25:09,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:25:10,245 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:25:10,245 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:25:10,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [667637263] [2021-11-07 02:25:10,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [667637263] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:25:10,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1923976799] [2021-11-07 02:25:10,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:25:10,246 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:25:10,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:25:10,247 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:25:10,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2021-11-07 02:25:11,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:25:11,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 02:25:11,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:25:12,381 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:25:12,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:25:12,987 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:25:12,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1923976799] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:25:12,987 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:25:12,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5] total 22 [2021-11-07 02:25:12,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614968337] [2021-11-07 02:25:12,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 02:25:12,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:25:12,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 02:25:12,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-11-07 02:25:12,989 INFO L87 Difference]: Start difference. First operand 38121 states and 68277 transitions. Second operand has 16 states, 16 states have (on average 8.8125) internal successors, (141), 15 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:30,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:25:30,457 INFO L93 Difference]: Finished difference Result 77255 states and 138029 transitions. [2021-11-07 02:25:30,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 02:25:30,459 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 8.8125) internal successors, (141), 15 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2021-11-07 02:25:30,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:25:30,588 INFO L225 Difference]: With dead ends: 77255 [2021-11-07 02:25:30,589 INFO L226 Difference]: Without dead ends: 77010 [2021-11-07 02:25:30,603 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 368 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=195, Invalid=675, Unknown=0, NotChecked=0, Total=870 [2021-11-07 02:25:30,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77010 states. [2021-11-07 02:25:34,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77010 to 75885. [2021-11-07 02:25:34,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75885 states, 75884 states have (on average 1.7915766169416478) internal successors, (135952), 75884 states have internal predecessors, (135952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:34,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75885 states to 75885 states and 135952 transitions. [2021-11-07 02:25:34,607 INFO L78 Accepts]: Start accepts. Automaton has 75885 states and 135952 transitions. Word has length 98 [2021-11-07 02:25:34,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:25:34,607 INFO L470 AbstractCegarLoop]: Abstraction has 75885 states and 135952 transitions. [2021-11-07 02:25:34,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 8.8125) internal successors, (141), 15 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:34,607 INFO L276 IsEmpty]: Start isEmpty. Operand 75885 states and 135952 transitions. [2021-11-07 02:25:34,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-07 02:25:34,658 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:25:34,658 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:25:34,670 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-07 02:25:34,863 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2021-11-07 02:25:35,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:25:35,059 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:25:35,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:25:35,060 INFO L85 PathProgramCache]: Analyzing trace with hash 721858484, now seen corresponding path program 1 times [2021-11-07 02:25:35,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:25:35,060 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2146928757] [2021-11-07 02:25:35,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:25:35,060 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:25:35,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:25:35,063 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:25:35,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-07 02:25:36,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:25:36,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:25:36,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:25:36,489 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:25:36,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:25:36,752 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:25:36,753 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:25:36,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2146928757] [2021-11-07 02:25:36,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2146928757] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:25:36,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [623545808] [2021-11-07 02:25:36,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:25:36,753 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:25:36,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:25:36,759 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:25:36,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2021-11-07 02:25:38,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:25:38,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 02:25:38,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:25:38,649 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:25:38,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:25:38,849 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:25:38,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [623545808] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:25:38,849 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:25:38,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 11 [2021-11-07 02:25:38,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902356880] [2021-11-07 02:25:38,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:25:38,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:25:38,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:25:38,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-07 02:25:38,851 INFO L87 Difference]: Start difference. First operand 75885 states and 135952 transitions. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:41,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:25:41,999 INFO L93 Difference]: Finished difference Result 76670 states and 137142 transitions. [2021-11-07 02:25:42,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:25:42,006 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2021-11-07 02:25:42,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:25:42,137 INFO L225 Difference]: With dead ends: 76670 [2021-11-07 02:25:42,137 INFO L226 Difference]: Without dead ends: 76127 [2021-11-07 02:25:42,150 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 379 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-11-07 02:25:42,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76127 states. [2021-11-07 02:25:45,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76127 to 75845. [2021-11-07 02:25:46,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75845 states, 75844 states have (on average 1.791506249670376) internal successors, (135875), 75844 states have internal predecessors, (135875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:46,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75845 states to 75845 states and 135875 transitions. [2021-11-07 02:25:46,160 INFO L78 Accepts]: Start accepts. Automaton has 75845 states and 135875 transitions. Word has length 98 [2021-11-07 02:25:46,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:25:46,160 INFO L470 AbstractCegarLoop]: Abstraction has 75845 states and 135875 transitions. [2021-11-07 02:25:46,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:46,160 INFO L276 IsEmpty]: Start isEmpty. Operand 75845 states and 135875 transitions. [2021-11-07 02:25:46,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-07 02:25:46,219 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:25:46,219 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:25:46,225 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2021-11-07 02:25:46,432 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-11-07 02:25:46,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:25:46,620 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:25:46,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:25:46,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1515047541, now seen corresponding path program 1 times [2021-11-07 02:25:46,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:25:46,622 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [677453542] [2021-11-07 02:25:46,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:25:46,622 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:25:46,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:25:46,623 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:25:46,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-07 02:25:48,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:25:48,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:25:48,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:25:48,449 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:25:48,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:25:48,702 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:25:48,702 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:25:48,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [677453542] [2021-11-07 02:25:48,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [677453542] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:25:48,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [785846676] [2021-11-07 02:25:48,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:25:48,703 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:25:48,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:25:48,719 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:25:48,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a00e0048-417d-49f5-938c-1cd8a39b4470/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2021-11-07 02:25:50,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:25:50,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 02:25:50,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:25:51,192 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:25:51,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:25:51,592 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:25:51,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [785846676] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:25:51,593 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:25:51,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5] total 22 [2021-11-07 02:25:51,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655784923] [2021-11-07 02:25:51,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 02:25:51,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:25:51,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 02:25:51,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-11-07 02:25:51,594 INFO L87 Difference]: Start difference. First operand 75845 states and 135875 transitions. Second operand has 16 states, 16 states have (on average 8.9375) internal successors, (143), 15 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)