./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec1_product33.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_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/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_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec1_product33.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/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_b92c62dc-d3ac-4419-b6a3-39652bdc7402/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 00f3978296386b105e45bba586b0df56f2d34b783492fc63d6fdcb596a8910f4 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:30:08,354 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:30:08,357 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:30:08,413 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:30:08,414 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:30:08,418 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:30:08,420 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:30:08,424 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:30:08,427 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:30:08,435 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:30:08,436 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:30:08,438 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:30:08,438 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:30:08,441 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:30:08,443 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:30:08,448 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:30:08,451 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:30:08,452 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:30:08,455 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:30:08,462 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:30:08,464 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:30:08,466 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:30:08,469 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:30:08,470 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:30:08,479 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:30:08,480 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:30:08,480 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:30:08,482 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:30:08,483 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:30:08,484 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:30:08,485 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:30:08,486 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:30:08,488 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:30:08,489 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:30:08,490 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:30:08,491 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:30:08,491 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:30:08,492 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:30:08,492 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:30:08,493 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:30:08,494 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:30:08,494 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:30:08,529 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:30:08,529 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:30:08,530 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:30:08,530 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:30:08,531 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:30:08,531 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:30:08,531 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:30:08,531 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:30:08,532 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:30:08,532 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:30:08,532 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:30:08,532 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:30:08,533 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:30:08,533 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:30:08,533 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:30:08,534 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:30:08,534 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:30:08,534 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:30:08,535 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:30:08,535 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:30:08,535 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:30:08,535 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:30:08,536 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:30:08,536 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:30:08,536 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:30:08,536 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:30:08,537 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:30:08,537 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:30:08,537 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:30:08,537 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:30:08,538 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:30:08,538 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:30:08,538 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:30:08,538 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:30:08,539 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:30:08,539 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:30:08,539 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:30:08,539 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:30:08,540 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:30:08,540 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_b92c62dc-d3ac-4419-b6a3-39652bdc7402/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 00f3978296386b105e45bba586b0df56f2d34b783492fc63d6fdcb596a8910f4 [2021-11-07 01:30:08,767 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:30:08,787 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:30:08,789 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:30:08,791 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:30:08,791 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:30:08,792 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec1_product33.cil.c [2021-11-07 01:30:08,858 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/data/2d193c96a/22681f39ef0d4862b8eb3cdbb489f937/FLAG0e7157be3 [2021-11-07 01:30:09,530 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:30:09,540 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/sv-benchmarks/c/product-lines/email_spec1_product33.cil.c [2021-11-07 01:30:09,562 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/data/2d193c96a/22681f39ef0d4862b8eb3cdbb489f937/FLAG0e7157be3 [2021-11-07 01:30:09,752 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/data/2d193c96a/22681f39ef0d4862b8eb3cdbb489f937 [2021-11-07 01:30:09,754 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:30:09,755 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:30:09,769 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:30:09,769 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:30:09,772 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:30:09,773 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:30:09" (1/1) ... [2021-11-07 01:30:09,774 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b987217 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:09, skipping insertion in model container [2021-11-07 01:30:09,774 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:30:09" (1/1) ... [2021-11-07 01:30:09,782 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:30:09,863 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:30:10,079 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_b92c62dc-d3ac-4419-b6a3-39652bdc7402/sv-benchmarks/c/product-lines/email_spec1_product33.cil.c[1542,1555] [2021-11-07 01:30:10,456 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:30:10,477 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 01:30:10,478 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7fd80e1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:10, skipping insertion in model container [2021-11-07 01:30:10,478 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:30:10,478 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:30:10,480 INFO L168 Benchmark]: Toolchain (without parser) took 724.07 ms. Allocated memory is still 107.0 MB. Free memory was 72.2 MB in the beginning and 68.1 MB in the end (delta: 4.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-07 01:30:10,481 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 107.0 MB. Free memory is still 62.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:30:10,482 INFO L168 Benchmark]: CACSL2BoogieTranslator took 709.19 ms. Allocated memory is still 107.0 MB. Free memory was 71.9 MB in the beginning and 68.1 MB in the end (delta: 3.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-07 01:30:10,483 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 107.0 MB. Free memory is still 62.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 709.19 ms. Allocated memory is still 107.0 MB. Free memory was 71.9 MB in the beginning and 68.1 MB in the end (delta: 3.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 263]: 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_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/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_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec1_product33.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/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_b92c62dc-d3ac-4419-b6a3-39652bdc7402/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 00f3978296386b105e45bba586b0df56f2d34b783492fc63d6fdcb596a8910f4 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:30:12,722 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:30:12,726 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:30:12,778 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:30:12,779 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:30:12,783 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:30:12,785 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:30:12,789 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:30:12,793 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:30:12,800 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:30:12,802 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:30:12,803 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:30:12,804 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:30:12,806 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:30:12,808 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:30:12,813 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:30:12,815 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:30:12,816 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:30:12,818 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:30:12,826 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:30:12,828 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:30:12,829 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:30:12,831 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:30:12,834 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:30:12,842 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:30:12,843 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:30:12,843 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:30:12,845 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:30:12,846 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:30:12,847 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:30:12,847 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:30:12,848 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:30:12,850 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:30:12,851 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:30:12,875 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:30:12,876 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:30:12,876 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:30:12,877 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:30:12,877 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:30:12,878 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:30:12,879 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:30:12,884 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:30:12,925 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:30:12,925 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:30:12,926 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:30:12,927 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:30:12,927 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:30:12,927 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:30:12,927 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:30:12,928 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:30:12,928 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:30:12,929 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:30:12,930 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:30:12,931 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:30:12,931 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:30:12,931 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:30:12,931 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:30:12,931 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:30:12,932 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:30:12,932 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:30:12,932 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:30:12,932 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:30:12,933 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:30:12,933 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:30:12,933 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:30:12,933 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:30:12,934 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:30:12,934 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:30:12,934 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:30:12,935 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:30:12,935 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:30:12,935 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:30:12,935 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:30:12,935 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:30:12,936 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:30:12,936 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:30:12,937 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:30:12,937 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_b92c62dc-d3ac-4419-b6a3-39652bdc7402/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 00f3978296386b105e45bba586b0df56f2d34b783492fc63d6fdcb596a8910f4 [2021-11-07 01:30:13,361 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:30:13,385 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:30:13,388 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:30:13,390 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:30:13,390 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:30:13,393 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec1_product33.cil.c [2021-11-07 01:30:13,457 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/data/012820b8e/aec503414b31487eab5b9135b468f23e/FLAG95565337d [2021-11-07 01:30:14,206 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:30:14,206 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/sv-benchmarks/c/product-lines/email_spec1_product33.cil.c [2021-11-07 01:30:14,227 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/data/012820b8e/aec503414b31487eab5b9135b468f23e/FLAG95565337d [2021-11-07 01:30:14,391 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/data/012820b8e/aec503414b31487eab5b9135b468f23e [2021-11-07 01:30:14,393 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:30:14,395 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:30:14,399 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:30:14,399 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:30:14,403 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:30:14,405 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:30:14" (1/1) ... [2021-11-07 01:30:14,407 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3912bbbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:14, skipping insertion in model container [2021-11-07 01:30:14,407 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:30:14" (1/1) ... [2021-11-07 01:30:14,415 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:30:14,538 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:30:14,687 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_b92c62dc-d3ac-4419-b6a3-39652bdc7402/sv-benchmarks/c/product-lines/email_spec1_product33.cil.c[1542,1555] [2021-11-07 01:30:15,134 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:30:15,158 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:30:15,175 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:30:15,181 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_b92c62dc-d3ac-4419-b6a3-39652bdc7402/sv-benchmarks/c/product-lines/email_spec1_product33.cil.c[1542,1555] [2021-11-07 01:30:15,324 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:30:15,330 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:30:15,341 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_b92c62dc-d3ac-4419-b6a3-39652bdc7402/sv-benchmarks/c/product-lines/email_spec1_product33.cil.c[1542,1555] [2021-11-07 01:30:15,424 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:30:15,475 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:30:15,475 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:15 WrapperNode [2021-11-07 01:30:15,476 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:30:15,477 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:30:15,477 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:30:15,477 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:30:15,484 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:15" (1/1) ... [2021-11-07 01:30:15,533 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:15" (1/1) ... [2021-11-07 01:30:15,663 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:30:15,664 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:30:15,664 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:30:15,664 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:30:15,673 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:15" (1/1) ... [2021-11-07 01:30:15,673 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:15" (1/1) ... [2021-11-07 01:30:15,694 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:15" (1/1) ... [2021-11-07 01:30:15,695 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:15" (1/1) ... [2021-11-07 01:30:15,772 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:15" (1/1) ... [2021-11-07 01:30:15,800 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:15" (1/1) ... [2021-11-07 01:30:15,807 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:15" (1/1) ... [2021-11-07 01:30:15,823 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:30:15,824 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:30:15,824 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:30:15,824 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:30:15,825 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:15" (1/1) ... [2021-11-07 01:30:15,832 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:30:15,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:30:15,856 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:30:15,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:30:15,902 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 01:30:15,902 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:30:15,902 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:30:15,902 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:30:15,903 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:30:20,627 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:30:20,628 INFO L299 CfgBuilder]: Removed 403 assume(true) statements. [2021-11-07 01:30:20,631 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:30:20 BoogieIcfgContainer [2021-11-07 01:30:20,631 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:30:20,632 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:30:20,632 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:30:20,635 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:30:20,636 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:30:14" (1/3) ... [2021-11-07 01:30:20,636 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51c36134 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:30:20, skipping insertion in model container [2021-11-07 01:30:20,636 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:15" (2/3) ... [2021-11-07 01:30:20,637 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51c36134 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:30:20, skipping insertion in model container [2021-11-07 01:30:20,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:30:20" (3/3) ... [2021-11-07 01:30:20,638 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec1_product33.cil.c [2021-11-07 01:30:20,643 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:30:20,643 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-07 01:30:20,694 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:30:20,699 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 01:30:20,700 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-07 01:30:20,727 INFO L276 IsEmpty]: Start isEmpty. Operand has 593 states, 590 states have (on average 1.7338983050847459) internal successors, (1023), 592 states have internal predecessors, (1023), 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 01:30:20,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-07 01:30:20,740 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:30:20,741 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 01:30:20,741 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:30:20,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:30:20,747 INFO L85 PathProgramCache]: Analyzing trace with hash 590568299, now seen corresponding path program 1 times [2021-11-07 01:30:20,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:30:20,761 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2070430456] [2021-11-07 01:30:20,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:30:20,763 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:30:20,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:30:20,766 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:30:20,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:30:21,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:30:21,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:30:21,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:30:21,377 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 01:30:21,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:30:21,523 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 01:30:21,524 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:30:21,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2070430456] [2021-11-07 01:30:21,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2070430456] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:30:21,525 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:30:21,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:30:21,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821070028] [2021-11-07 01:30:21,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:30:21,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:30:21,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:30:21,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:30:21,554 INFO L87 Difference]: Start difference. First operand has 593 states, 590 states have (on average 1.7338983050847459) internal successors, (1023), 592 states have internal predecessors, (1023), 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 22.5) internal successors, (45), 2 states have internal predecessors, (45), 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 01:30:21,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:30:21,644 INFO L93 Difference]: Finished difference Result 940 states and 1598 transitions. [2021-11-07 01:30:21,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:30:21,646 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 22.5) internal successors, (45), 2 states have internal predecessors, (45), 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 01:30:21,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:30:21,667 INFO L225 Difference]: With dead ends: 940 [2021-11-07 01:30:21,668 INFO L226 Difference]: Without dead ends: 469 [2021-11-07 01:30:21,672 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 88 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 01:30:21,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-11-07 01:30:21,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 469. [2021-11-07 01:30:21,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 467 states have (on average 1.740899357601713) internal successors, (813), 468 states have internal predecessors, (813), 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 01:30:21,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 813 transitions. [2021-11-07 01:30:21,737 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 813 transitions. Word has length 45 [2021-11-07 01:30:21,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:30:21,737 INFO L470 AbstractCegarLoop]: Abstraction has 469 states and 813 transitions. [2021-11-07 01:30:21,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 22.5) internal successors, (45), 2 states have internal predecessors, (45), 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 01:30:21,738 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 813 transitions. [2021-11-07 01:30:21,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-07 01:30:21,741 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:30:21,742 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 01:30:21,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:30:21,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:30:21,945 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:30:21,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:30:21,946 INFO L85 PathProgramCache]: Analyzing trace with hash 635357278, now seen corresponding path program 1 times [2021-11-07 01:30:21,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:30:21,947 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [204060352] [2021-11-07 01:30:21,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:30:21,947 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:30:21,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:30:21,948 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:30:21,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:30:22,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:30:22,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:30:22,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:30:22,490 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 01:30:22,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:30:22,626 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 01:30:22,626 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:30:22,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [204060352] [2021-11-07 01:30:22,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [204060352] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:30:22,627 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:30:22,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:30:22,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233758328] [2021-11-07 01:30:22,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:30:22,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:30:22,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:30:22,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:30:22,631 INFO L87 Difference]: Start difference. First operand 469 states and 813 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 01:30:22,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:30:22,749 INFO L93 Difference]: Finished difference Result 1377 states and 2391 transitions. [2021-11-07 01:30:22,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:30:22,749 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 46 [2021-11-07 01:30:22,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:30:22,758 INFO L225 Difference]: With dead ends: 1377 [2021-11-07 01:30:22,758 INFO L226 Difference]: Without dead ends: 923 [2021-11-07 01:30:22,761 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 88 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 01:30:22,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 923 states. [2021-11-07 01:30:22,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 923 to 468. [2021-11-07 01:30:22,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 466 states have (on average 1.7339055793991416) internal successors, (808), 467 states have internal predecessors, (808), 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 01:30:22,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 808 transitions. [2021-11-07 01:30:22,824 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 808 transitions. Word has length 46 [2021-11-07 01:30:22,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:30:22,825 INFO L470 AbstractCegarLoop]: Abstraction has 468 states and 808 transitions. [2021-11-07 01:30:22,826 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 01:30:22,826 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 808 transitions. [2021-11-07 01:30:22,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-07 01:30:22,835 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:30:22,835 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 01:30:22,857 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:30:23,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:30:23,053 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:30:23,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:30:23,054 INFO L85 PathProgramCache]: Analyzing trace with hash 342314680, now seen corresponding path program 1 times [2021-11-07 01:30:23,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:30:23,055 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [817095674] [2021-11-07 01:30:23,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:30:23,056 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:30:23,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:30:23,057 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:30:23,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:30:23,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:30:23,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:30:23,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:30:23,583 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 01:30:23,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:30:23,746 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 01:30:23,746 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:30:23,747 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [817095674] [2021-11-07 01:30:23,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [817095674] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:30:23,747 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:30:23,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:30:23,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085551707] [2021-11-07 01:30:23,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:30:23,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:30:23,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:30:23,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:30:23,749 INFO L87 Difference]: Start difference. First operand 468 states and 808 transitions. Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 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 01:30:23,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:30:23,964 INFO L93 Difference]: Finished difference Result 1789 states and 3094 transitions. [2021-11-07 01:30:23,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:30:23,965 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 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 01:30:23,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:30:23,974 INFO L225 Difference]: With dead ends: 1789 [2021-11-07 01:30:23,974 INFO L226 Difference]: Without dead ends: 1339 [2021-11-07 01:30:23,975 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 90 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 01:30:23,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1339 states. [2021-11-07 01:30:24,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1339 to 467. [2021-11-07 01:30:24,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 465 states have (on average 1.729032258064516) internal successors, (804), 466 states have internal predecessors, (804), 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 01:30:24,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 804 transitions. [2021-11-07 01:30:24,012 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 804 transitions. Word has length 48 [2021-11-07 01:30:24,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:30:24,013 INFO L470 AbstractCegarLoop]: Abstraction has 467 states and 804 transitions. [2021-11-07 01:30:24,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 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 01:30:24,013 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 804 transitions. [2021-11-07 01:30:24,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-07 01:30:24,015 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:30:24,015 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:30:24,038 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:30:24,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:30:24,230 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:30:24,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:30:24,230 INFO L85 PathProgramCache]: Analyzing trace with hash 2131983365, now seen corresponding path program 1 times [2021-11-07 01:30:24,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:30:24,231 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2086700798] [2021-11-07 01:30:24,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:30:24,232 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:30:24,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:30:24,233 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:30:24,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:30:24,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:30:24,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:30:24,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:30:24,907 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 01:30:24,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:30:25,043 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 01:30:25,043 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:30:25,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2086700798] [2021-11-07 01:30:25,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2086700798] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:30:25,044 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:30:25,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:30:25,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762861134] [2021-11-07 01:30:25,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:30:25,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:30:25,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:30:25,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:30:25,046 INFO L87 Difference]: Start difference. First operand 467 states and 804 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 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 01:30:25,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:30:25,117 INFO L93 Difference]: Finished difference Result 931 states and 1605 transitions. [2021-11-07 01:30:25,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:30:25,118 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 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 49 [2021-11-07 01:30:25,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:30:25,121 INFO L225 Difference]: With dead ends: 931 [2021-11-07 01:30:25,122 INFO L226 Difference]: Without dead ends: 472 [2021-11-07 01:30:25,123 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:30:25,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-11-07 01:30:25,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 467. [2021-11-07 01:30:25,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 465 states have (on average 1.7225806451612904) internal successors, (801), 466 states have internal predecessors, (801), 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 01:30:25,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 801 transitions. [2021-11-07 01:30:25,153 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 801 transitions. Word has length 49 [2021-11-07 01:30:25,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:30:25,154 INFO L470 AbstractCegarLoop]: Abstraction has 467 states and 801 transitions. [2021-11-07 01:30:25,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 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 01:30:25,154 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 801 transitions. [2021-11-07 01:30:25,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-07 01:30:25,156 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:30:25,156 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] [2021-11-07 01:30:25,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:30:25,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:30:25,370 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:30:25,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:30:25,370 INFO L85 PathProgramCache]: Analyzing trace with hash -362414896, now seen corresponding path program 1 times [2021-11-07 01:30:25,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:30:25,371 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1732045236] [2021-11-07 01:30:25,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:30:25,372 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:30:25,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:30:25,373 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:30:25,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:30:25,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:30:25,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:30:25,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:30:25,953 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 01:30:25,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:30:26,082 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 01:30:26,083 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:30:26,083 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1732045236] [2021-11-07 01:30:26,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1732045236] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:30:26,083 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:30:26,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:30:26,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175568714] [2021-11-07 01:30:26,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:30:26,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:30:26,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:30:26,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:30:26,085 INFO L87 Difference]: Start difference. First operand 467 states and 801 transitions. Second operand has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:30:26,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:30:26,351 INFO L93 Difference]: Finished difference Result 1776 states and 3070 transitions. [2021-11-07 01:30:26,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:30:26,352 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-07 01:30:26,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:30:26,362 INFO L225 Difference]: With dead ends: 1776 [2021-11-07 01:30:26,362 INFO L226 Difference]: Without dead ends: 1335 [2021-11-07 01:30:26,364 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 94 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 01:30:26,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1335 states. [2021-11-07 01:30:26,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1335 to 467. [2021-11-07 01:30:26,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 465 states have (on average 1.7161290322580645) internal successors, (798), 466 states have internal predecessors, (798), 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 01:30:26,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 798 transitions. [2021-11-07 01:30:26,413 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 798 transitions. Word has length 50 [2021-11-07 01:30:26,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:30:26,413 INFO L470 AbstractCegarLoop]: Abstraction has 467 states and 798 transitions. [2021-11-07 01:30:26,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:30:26,414 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 798 transitions. [2021-11-07 01:30:26,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 01:30:26,416 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:30:26,416 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:30:26,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:30:26,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:30:26,632 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:30:26,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:30:26,633 INFO L85 PathProgramCache]: Analyzing trace with hash 2082866613, now seen corresponding path program 1 times [2021-11-07 01:30:26,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:30:26,634 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1416542921] [2021-11-07 01:30:26,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:30:26,634 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:30:26,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:30:26,637 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:30:26,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:30:27,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:30:27,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:30:27,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:30:27,170 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 01:30:27,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:30:27,310 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 01:30:27,310 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:30:27,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1416542921] [2021-11-07 01:30:27,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1416542921] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:30:27,311 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:30:27,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:30:27,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821993691] [2021-11-07 01:30:27,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:30:27,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:30:27,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:30:27,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:30:27,313 INFO L87 Difference]: Start difference. First operand 467 states and 798 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:30:27,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:30:27,414 INFO L93 Difference]: Finished difference Result 1131 states and 1934 transitions. [2021-11-07 01:30:27,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:30:27,415 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-07 01:30:27,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:30:27,421 INFO L225 Difference]: With dead ends: 1131 [2021-11-07 01:30:27,421 INFO L226 Difference]: Without dead ends: 908 [2021-11-07 01:30:27,422 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:30:27,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 908 states. [2021-11-07 01:30:27,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 908 to 685. [2021-11-07 01:30:27,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 685 states, 683 states have (on average 1.7510980966325036) internal successors, (1196), 684 states have internal predecessors, (1196), 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 01:30:27,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685 states to 685 states and 1196 transitions. [2021-11-07 01:30:27,477 INFO L78 Accepts]: Start accepts. Automaton has 685 states and 1196 transitions. Word has length 52 [2021-11-07 01:30:27,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:30:27,477 INFO L470 AbstractCegarLoop]: Abstraction has 685 states and 1196 transitions. [2021-11-07 01:30:27,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:30:27,478 INFO L276 IsEmpty]: Start isEmpty. Operand 685 states and 1196 transitions. [2021-11-07 01:30:27,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 01:30:27,479 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:30:27,480 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, 1, 1] [2021-11-07 01:30:27,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:30:27,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:30:27,694 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:30:27,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:30:27,694 INFO L85 PathProgramCache]: Analyzing trace with hash 5598948, now seen corresponding path program 1 times [2021-11-07 01:30:27,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:30:27,695 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [224780334] [2021-11-07 01:30:27,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:30:27,695 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:30:27,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:30:27,697 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:30:27,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:30:28,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:30:28,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:30:28,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:30:28,342 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 01:30:28,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:30:28,488 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 01:30:28,488 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:30:28,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [224780334] [2021-11-07 01:30:28,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [224780334] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:30:28,488 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:30:28,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:30:28,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026197036] [2021-11-07 01:30:28,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:30:28,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:30:28,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:30:28,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:30:28,490 INFO L87 Difference]: Start difference. First operand 685 states and 1196 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 01:30:28,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:30:28,585 INFO L93 Difference]: Finished difference Result 1675 states and 2929 transitions. [2021-11-07 01:30:28,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:30:28,585 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 01:30:28,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:30:28,592 INFO L225 Difference]: With dead ends: 1675 [2021-11-07 01:30:28,592 INFO L226 Difference]: Without dead ends: 1074 [2021-11-07 01:30:28,594 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 01:30:28,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1074 states. [2021-11-07 01:30:28,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1074 to 851. [2021-11-07 01:30:28,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 851 states, 849 states have (on average 1.7632508833922262) internal successors, (1497), 850 states have internal predecessors, (1497), 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 01:30:28,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 851 states to 851 states and 1497 transitions. [2021-11-07 01:30:28,684 INFO L78 Accepts]: Start accepts. Automaton has 851 states and 1497 transitions. Word has length 64 [2021-11-07 01:30:28,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:30:28,684 INFO L470 AbstractCegarLoop]: Abstraction has 851 states and 1497 transitions. [2021-11-07 01:30:28,685 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 01:30:28,685 INFO L276 IsEmpty]: Start isEmpty. Operand 851 states and 1497 transitions. [2021-11-07 01:30:28,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 01:30:28,687 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:30:28,687 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 01:30:28,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:30:28,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:30:28,901 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:30:28,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:30:28,902 INFO L85 PathProgramCache]: Analyzing trace with hash 408211173, now seen corresponding path program 1 times [2021-11-07 01:30:28,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:30:28,902 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1187840816] [2021-11-07 01:30:28,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:30:28,903 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:30:28,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:30:28,904 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:30:28,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:30:29,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:30:29,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:30:29,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:30:29,559 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 01:30:29,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:30:29,697 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 01:30:29,697 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:30:29,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1187840816] [2021-11-07 01:30:29,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1187840816] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:30:29,698 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:30:29,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:30:29,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940506611] [2021-11-07 01:30:29,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:30:29,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:30:29,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:30:29,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:30:29,700 INFO L87 Difference]: Start difference. First operand 851 states and 1497 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 01:30:29,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:30:29,845 INFO L93 Difference]: Finished difference Result 2205 states and 3897 transitions. [2021-11-07 01:30:29,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:30:29,849 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 01:30:29,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:30:29,858 INFO L225 Difference]: With dead ends: 2205 [2021-11-07 01:30:29,859 INFO L226 Difference]: Without dead ends: 1446 [2021-11-07 01:30:29,861 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 01:30:29,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1446 states. [2021-11-07 01:30:29,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1446 to 1223. [2021-11-07 01:30:29,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1223 states, 1221 states have (on average 1.7813267813267812) internal successors, (2175), 1222 states have internal predecessors, (2175), 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 01:30:29,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1223 states to 1223 states and 2175 transitions. [2021-11-07 01:30:29,965 INFO L78 Accepts]: Start accepts. Automaton has 1223 states and 2175 transitions. Word has length 65 [2021-11-07 01:30:29,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:30:29,966 INFO L470 AbstractCegarLoop]: Abstraction has 1223 states and 2175 transitions. [2021-11-07 01:30:29,966 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 01:30:29,966 INFO L276 IsEmpty]: Start isEmpty. Operand 1223 states and 2175 transitions. [2021-11-07 01:30:29,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 01:30:29,969 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:30:29,969 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:30:29,985 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:30:30,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:30:30,185 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:30:30,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:30:30,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1965181046, now seen corresponding path program 1 times [2021-11-07 01:30:30,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:30:30,186 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [808241499] [2021-11-07 01:30:30,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:30:30,186 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:30:30,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:30:30,187 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:30:30,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:30:30,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:30:30,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:30:30,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:30:30,800 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 01:30:30,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:30:30,942 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 01:30:30,943 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:30:30,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [808241499] [2021-11-07 01:30:30,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [808241499] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:30:30,943 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:30:30,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:30:30,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009632132] [2021-11-07 01:30:30,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:30:30,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:30:30,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:30:30,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:30:30,945 INFO L87 Difference]: Start difference. First operand 1223 states and 2175 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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 01:30:31,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:30:31,097 INFO L93 Difference]: Finished difference Result 3301 states and 5900 transitions. [2021-11-07 01:30:31,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:30:31,098 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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 01:30:31,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:30:31,111 INFO L225 Difference]: With dead ends: 3301 [2021-11-07 01:30:31,112 INFO L226 Difference]: Without dead ends: 2178 [2021-11-07 01:30:31,114 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 129 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 01:30:31,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2178 states. [2021-11-07 01:30:31,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2178 to 1955. [2021-11-07 01:30:31,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1955 states, 1953 states have (on average 1.7972350230414746) internal successors, (3510), 1954 states have internal predecessors, (3510), 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 01:30:31,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1955 states to 1955 states and 3510 transitions. [2021-11-07 01:30:31,260 INFO L78 Accepts]: Start accepts. Automaton has 1955 states and 3510 transitions. Word has length 66 [2021-11-07 01:30:31,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:30:31,260 INFO L470 AbstractCegarLoop]: Abstraction has 1955 states and 3510 transitions. [2021-11-07 01:30:31,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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 01:30:31,261 INFO L276 IsEmpty]: Start isEmpty. Operand 1955 states and 3510 transitions. [2021-11-07 01:30:31,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 01:30:31,264 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:30:31,264 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:30:31,283 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:30:31,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:30:31,479 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:30:31,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:30:31,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1108894986, now seen corresponding path program 1 times [2021-11-07 01:30:31,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:30:31,481 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1137530331] [2021-11-07 01:30:31,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:30:31,481 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:30:31,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:30:31,483 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:30:31,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:30:31,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:30:31,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:30:31,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:30:32,139 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 01:30:32,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:30:32,290 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 01:30:32,290 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:30:32,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1137530331] [2021-11-07 01:30:32,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1137530331] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:30:32,291 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:30:32,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:30:32,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551817326] [2021-11-07 01:30:32,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:30:32,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:30:32,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:30:32,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:30:32,293 INFO L87 Difference]: Start difference. First operand 1955 states and 3510 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:30:32,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:30:32,516 INFO L93 Difference]: Finished difference Result 5233 states and 9424 transitions. [2021-11-07 01:30:32,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:30:32,517 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-07 01:30:32,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:30:32,538 INFO L225 Difference]: With dead ends: 5233 [2021-11-07 01:30:32,538 INFO L226 Difference]: Without dead ends: 3412 [2021-11-07 01:30:32,543 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:30:32,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3412 states. [2021-11-07 01:30:32,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3412 to 3189. [2021-11-07 01:30:32,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3189 states, 3187 states have (on average 1.8057734546595545) internal successors, (5755), 3188 states have internal predecessors, (5755), 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 01:30:32,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3189 states to 3189 states and 5755 transitions. [2021-11-07 01:30:32,791 INFO L78 Accepts]: Start accepts. Automaton has 3189 states and 5755 transitions. Word has length 67 [2021-11-07 01:30:32,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:30:32,791 INFO L470 AbstractCegarLoop]: Abstraction has 3189 states and 5755 transitions. [2021-11-07 01:30:32,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:30:32,792 INFO L276 IsEmpty]: Start isEmpty. Operand 3189 states and 5755 transitions. [2021-11-07 01:30:32,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 01:30:32,813 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:30:32,813 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:30:32,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:30:33,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:30:33,028 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:30:33,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:30:33,028 INFO L85 PathProgramCache]: Analyzing trace with hash -385516443, now seen corresponding path program 1 times [2021-11-07 01:30:33,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:30:33,029 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1871332386] [2021-11-07 01:30:33,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:30:33,029 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:30:33,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:30:33,030 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:30:33,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:30:33,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:30:33,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:30:33,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:30:33,706 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 01:30:33,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:30:33,868 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 01:30:33,868 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:30:33,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1871332386] [2021-11-07 01:30:33,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1871332386] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:30:33,869 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:30:33,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:30:33,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457055643] [2021-11-07 01:30:33,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:30:33,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:30:33,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:30:33,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:30:33,878 INFO L87 Difference]: Start difference. First operand 3189 states and 5755 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:30:34,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:30:34,213 INFO L93 Difference]: Finished difference Result 8651 states and 15642 transitions. [2021-11-07 01:30:34,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:30:34,213 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-07 01:30:34,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:30:34,251 INFO L225 Difference]: With dead ends: 8651 [2021-11-07 01:30:34,251 INFO L226 Difference]: Without dead ends: 5630 [2021-11-07 01:30:34,256 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:30:34,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5630 states. [2021-11-07 01:30:34,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5630 to 5407. [2021-11-07 01:30:34,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5407 states, 5405 states have (on average 1.8094357076780758) internal successors, (9780), 5406 states have internal predecessors, (9780), 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 01:30:34,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5407 states to 5407 states and 9780 transitions. [2021-11-07 01:30:34,648 INFO L78 Accepts]: Start accepts. Automaton has 5407 states and 9780 transitions. Word has length 68 [2021-11-07 01:30:34,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:30:34,649 INFO L470 AbstractCegarLoop]: Abstraction has 5407 states and 9780 transitions. [2021-11-07 01:30:34,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:30:34,650 INFO L276 IsEmpty]: Start isEmpty. Operand 5407 states and 9780 transitions. [2021-11-07 01:30:34,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 01:30:34,655 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:30:34,655 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:30:34,670 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:30:34,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:30:34,870 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:30:34,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:30:34,871 INFO L85 PathProgramCache]: Analyzing trace with hash -880440315, now seen corresponding path program 1 times [2021-11-07 01:30:34,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:30:34,871 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [478637402] [2021-11-07 01:30:34,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:30:34,872 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:30:34,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:30:34,872 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:30:34,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:30:35,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:30:35,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:30:35,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:30:35,586 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 01:30:35,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:30:35,733 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 01:30:35,734 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:30:35,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [478637402] [2021-11-07 01:30:35,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [478637402] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:30:35,734 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:30:35,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:30:35,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422768354] [2021-11-07 01:30:35,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:30:35,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:30:35,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:30:35,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:30:35,735 INFO L87 Difference]: Start difference. First operand 5407 states and 9780 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:30:36,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:30:36,309 INFO L93 Difference]: Finished difference Result 15631 states and 28328 transitions. [2021-11-07 01:30:36,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:30:36,310 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-07 01:30:36,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:30:36,372 INFO L225 Difference]: With dead ends: 15631 [2021-11-07 01:30:36,372 INFO L226 Difference]: Without dead ends: 10400 [2021-11-07 01:30:36,379 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:30:36,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10400 states. [2021-11-07 01:30:37,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10400 to 10177. [2021-11-07 01:30:37,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10177 states, 10175 states have (on average 1.811990171990172) internal successors, (18437), 10176 states have internal predecessors, (18437), 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 01:30:37,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10177 states to 10177 states and 18437 transitions. [2021-11-07 01:30:37,078 INFO L78 Accepts]: Start accepts. Automaton has 10177 states and 18437 transitions. Word has length 69 [2021-11-07 01:30:37,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:30:37,079 INFO L470 AbstractCegarLoop]: Abstraction has 10177 states and 18437 transitions. [2021-11-07 01:30:37,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:30:37,079 INFO L276 IsEmpty]: Start isEmpty. Operand 10177 states and 18437 transitions. [2021-11-07 01:30:37,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 01:30:37,086 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:30:37,087 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:30:37,121 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:30:37,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:30:37,301 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:30:37,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:30:37,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1949617387, now seen corresponding path program 1 times [2021-11-07 01:30:37,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:30:37,303 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [624704523] [2021-11-07 01:30:37,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:30:37,303 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:30:37,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:30:37,304 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:30:37,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:30:37,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:30:37,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:30:37,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:30:38,038 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:30:38,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:30:38,215 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:30:38,215 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:30:38,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [624704523] [2021-11-07 01:30:38,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [624704523] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:30:38,215 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:30:38,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:30:38,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349205406] [2021-11-07 01:30:38,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:30:38,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:30:38,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:30:38,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:30:38,217 INFO L87 Difference]: Start difference. First operand 10177 states and 18437 transitions. Second operand has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 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 01:30:41,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:30:41,189 INFO L93 Difference]: Finished difference Result 25090 states and 45464 transitions. [2021-11-07 01:30:41,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:30:41,190 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 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 70 [2021-11-07 01:30:41,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:30:41,230 INFO L225 Difference]: With dead ends: 25090 [2021-11-07 01:30:41,231 INFO L226 Difference]: Without dead ends: 15167 [2021-11-07 01:30:41,243 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:30:41,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15167 states. [2021-11-07 01:30:41,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15167 to 10144. [2021-11-07 01:30:41,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10144 states, 10142 states have (on average 1.804870834154999) internal successors, (18305), 10143 states have internal predecessors, (18305), 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 01:30:42,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10144 states to 10144 states and 18305 transitions. [2021-11-07 01:30:42,014 INFO L78 Accepts]: Start accepts. Automaton has 10144 states and 18305 transitions. Word has length 70 [2021-11-07 01:30:42,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:30:42,015 INFO L470 AbstractCegarLoop]: Abstraction has 10144 states and 18305 transitions. [2021-11-07 01:30:42,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 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 01:30:42,015 INFO L276 IsEmpty]: Start isEmpty. Operand 10144 states and 18305 transitions. [2021-11-07 01:30:42,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 01:30:42,022 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:30:42,022 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:30:42,039 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-11-07 01:30:42,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:30:42,237 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:30:42,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:30:42,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1722217642, now seen corresponding path program 1 times [2021-11-07 01:30:42,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:30:42,238 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1045446533] [2021-11-07 01:30:42,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:30:42,238 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:30:42,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:30:42,241 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:30:42,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:30:43,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:30:43,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:30:43,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:30:43,195 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 01:30:43,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:30:43,346 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 01:30:43,347 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:30:43,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1045446533] [2021-11-07 01:30:43,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1045446533] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:30:43,347 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:30:43,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:30:43,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330949749] [2021-11-07 01:30:43,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:30:43,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:30:43,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:30:43,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:30:43,348 INFO L87 Difference]: Start difference. First operand 10144 states and 18305 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:30:44,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:30:44,154 INFO L93 Difference]: Finished difference Result 29674 states and 53610 transitions. [2021-11-07 01:30:44,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:30:44,155 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-07 01:30:44,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:30:44,200 INFO L225 Difference]: With dead ends: 29674 [2021-11-07 01:30:44,200 INFO L226 Difference]: Without dead ends: 19713 [2021-11-07 01:30:44,276 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:30:44,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19713 states. [2021-11-07 01:30:45,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19713 to 19490. [2021-11-07 01:30:45,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19490 states, 19488 states have (on average 1.804700328407225) internal successors, (35170), 19489 states have internal predecessors, (35170), 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 01:30:45,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19490 states to 19490 states and 35170 transitions. [2021-11-07 01:30:45,274 INFO L78 Accepts]: Start accepts. Automaton has 19490 states and 35170 transitions. Word has length 70 [2021-11-07 01:30:45,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:30:45,275 INFO L470 AbstractCegarLoop]: Abstraction has 19490 states and 35170 transitions. [2021-11-07 01:30:45,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:30:45,276 INFO L276 IsEmpty]: Start isEmpty. Operand 19490 states and 35170 transitions. [2021-11-07 01:30:45,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 01:30:45,285 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:30:45,285 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:30:45,300 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:30:45,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:30:45,500 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:30:45,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:30:45,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1179496598, now seen corresponding path program 1 times [2021-11-07 01:30:45,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:30:45,501 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [999695843] [2021-11-07 01:30:45,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:30:45,501 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:30:45,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:30:45,502 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:30:45,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:30:46,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:30:46,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:30:46,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:30:46,365 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 01:30:46,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:30:46,523 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 01:30:46,523 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:30:46,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [999695843] [2021-11-07 01:30:46,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [999695843] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:30:46,523 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:30:46,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:30:46,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012976790] [2021-11-07 01:30:46,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:30:46,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:30:46,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:30:46,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:30:46,525 INFO L87 Difference]: Start difference. First operand 19490 states and 35170 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:30:47,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:30:47,838 INFO L93 Difference]: Finished difference Result 57898 states and 104519 transitions. [2021-11-07 01:30:47,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:30:47,839 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-07 01:30:47,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:30:47,900 INFO L225 Difference]: With dead ends: 57898 [2021-11-07 01:30:47,900 INFO L226 Difference]: Without dead ends: 38595 [2021-11-07 01:30:47,925 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:30:47,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38595 states. [2021-11-07 01:30:49,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38595 to 38372. [2021-11-07 01:30:50,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38372 states, 38370 states have (on average 1.8023195204586917) internal successors, (69155), 38371 states have internal predecessors, (69155), 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 01:30:50,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38372 states to 38372 states and 69155 transitions. [2021-11-07 01:30:50,104 INFO L78 Accepts]: Start accepts. Automaton has 38372 states and 69155 transitions. Word has length 71 [2021-11-07 01:30:50,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:30:50,105 INFO L470 AbstractCegarLoop]: Abstraction has 38372 states and 69155 transitions. [2021-11-07 01:30:50,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:30:50,105 INFO L276 IsEmpty]: Start isEmpty. Operand 38372 states and 69155 transitions. [2021-11-07 01:30:50,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 01:30:50,114 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:30:50,115 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] [2021-11-07 01:30:50,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:30:50,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:30:50,330 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:30:50,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:30:50,330 INFO L85 PathProgramCache]: Analyzing trace with hash -41970929, now seen corresponding path program 1 times [2021-11-07 01:30:50,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:30:50,330 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1673760932] [2021-11-07 01:30:50,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:30:50,331 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:30:50,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:30:50,332 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:30:50,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 01:30:50,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:30:50,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 502 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:30:50,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:30:51,155 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 01:30:51,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:30:51,354 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 01:30:51,354 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:30:51,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1673760932] [2021-11-07 01:30:51,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1673760932] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:30:51,354 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:30:51,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:30:51,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272735166] [2021-11-07 01:30:51,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:30:51,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:30:51,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:30:51,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:30:51,356 INFO L87 Difference]: Start difference. First operand 38372 states and 69155 transitions. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 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 01:30:57,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:30:57,836 INFO L93 Difference]: Finished difference Result 148885 states and 268167 transitions. [2021-11-07 01:30:57,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:30:57,836 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-07 01:30:57,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:30:58,188 INFO L225 Difference]: With dead ends: 148885 [2021-11-07 01:30:58,188 INFO L226 Difference]: Without dead ends: 110766 [2021-11-07 01:30:58,226 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 138 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 01:30:58,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110766 states. [2021-11-07 01:31:01,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110766 to 38114. [2021-11-07 01:31:01,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38114 states, 38112 states have (on average 1.7874422753988246) internal successors, (68123), 38113 states have internal predecessors, (68123), 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 01:31:01,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38114 states to 38114 states and 68123 transitions. [2021-11-07 01:31:01,201 INFO L78 Accepts]: Start accepts. Automaton has 38114 states and 68123 transitions. Word has length 72 [2021-11-07 01:31:01,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:31:01,201 INFO L470 AbstractCegarLoop]: Abstraction has 38114 states and 68123 transitions. [2021-11-07 01:31:01,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 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 01:31:01,202 INFO L276 IsEmpty]: Start isEmpty. Operand 38114 states and 68123 transitions. [2021-11-07 01:31:01,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 01:31:01,209 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:31:01,210 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:31:01,225 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-11-07 01:31:01,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:31:01,425 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:31:01,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:31:01,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1600302543, now seen corresponding path program 1 times [2021-11-07 01:31:01,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:31:01,426 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1848334442] [2021-11-07 01:31:01,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:31:01,427 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:31:01,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:31:01,428 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:31:01,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:31:02,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:31:02,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 502 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:31:02,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:31:02,253 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:31:02,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:31:02,409 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:31:02,409 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:31:02,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1848334442] [2021-11-07 01:31:02,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1848334442] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:31:02,410 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:31:02,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:31:02,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119171617] [2021-11-07 01:31:02,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:31:02,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:31:02,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:31:02,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:31:02,411 INFO L87 Difference]: Start difference. First operand 38114 states and 68123 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 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 01:31:04,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:31:04,285 INFO L93 Difference]: Finished difference Result 76192 states and 136187 transitions. [2021-11-07 01:31:04,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:31:04,287 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-07 01:31:04,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:31:04,344 INFO L225 Difference]: With dead ends: 76192 [2021-11-07 01:31:04,345 INFO L226 Difference]: Without dead ends: 38337 [2021-11-07 01:31:04,370 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 140 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 01:31:04,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38337 states. [2021-11-07 01:31:06,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38337 to 38114. [2021-11-07 01:31:06,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38114 states, 38112 states have (on average 1.7840837531486147) internal successors, (67995), 38113 states have internal predecessors, (67995), 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 01:31:06,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38114 states to 38114 states and 67995 transitions. [2021-11-07 01:31:06,445 INFO L78 Accepts]: Start accepts. Automaton has 38114 states and 67995 transitions. Word has length 72 [2021-11-07 01:31:06,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:31:06,445 INFO L470 AbstractCegarLoop]: Abstraction has 38114 states and 67995 transitions. [2021-11-07 01:31:06,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 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 01:31:06,445 INFO L276 IsEmpty]: Start isEmpty. Operand 38114 states and 67995 transitions. [2021-11-07 01:31:06,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 01:31:06,454 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:31:06,454 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:31:06,476 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:31:06,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:31:06,670 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:31:06,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:31:06,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1383323996, now seen corresponding path program 1 times [2021-11-07 01:31:06,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:31:06,671 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1740193735] [2021-11-07 01:31:06,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:31:06,671 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:31:06,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:31:06,672 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:31:06,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 01:31:07,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:31:07,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:31:07,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:31:07,486 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 01:31:07,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:31:07,635 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 01:31:07,635 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:31:07,635 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1740193735] [2021-11-07 01:31:07,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1740193735] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:31:07,635 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:31:07,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:31:07,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314806292] [2021-11-07 01:31:07,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:31:07,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:31:07,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:31:07,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:31:07,638 INFO L87 Difference]: Start difference. First operand 38114 states and 67995 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:31:10,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:31:10,779 INFO L93 Difference]: Finished difference Result 105930 states and 188613 transitions. [2021-11-07 01:31:10,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:31:10,787 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-07 01:31:10,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:31:10,912 INFO L225 Difference]: With dead ends: 105930 [2021-11-07 01:31:10,912 INFO L226 Difference]: Without dead ends: 68035 [2021-11-07 01:31:10,939 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:31:10,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68035 states. [2021-11-07 01:31:14,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68035 to 67812. [2021-11-07 01:31:14,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67812 states, 67810 states have (on average 1.7747824804601091) internal successors, (120348), 67811 states have internal predecessors, (120348), 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 01:31:14,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67812 states to 67812 states and 120348 transitions. [2021-11-07 01:31:14,618 INFO L78 Accepts]: Start accepts. Automaton has 67812 states and 120348 transitions. Word has length 72 [2021-11-07 01:31:14,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:31:14,618 INFO L470 AbstractCegarLoop]: Abstraction has 67812 states and 120348 transitions. [2021-11-07 01:31:14,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:31:14,618 INFO L276 IsEmpty]: Start isEmpty. Operand 67812 states and 120348 transitions. [2021-11-07 01:31:14,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 01:31:14,625 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:31:14,625 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] [2021-11-07 01:31:14,640 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-07 01:31:14,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:31:14,827 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:31:14,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:31:14,827 INFO L85 PathProgramCache]: Analyzing trace with hash 798329387, now seen corresponding path program 1 times [2021-11-07 01:31:14,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:31:14,828 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [880987839] [2021-11-07 01:31:14,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:31:14,828 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:31:14,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:31:14,829 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:31:14,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 01:31:15,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:31:15,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:31:15,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:31:15,741 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 01:31:15,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:31:15,964 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 01:31:15,964 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:31:15,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [880987839] [2021-11-07 01:31:15,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [880987839] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:31:15,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1374185191] [2021-11-07 01:31:15,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:31:15,965 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:31:15,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:31:15,965 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:31:15,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92c62dc-d3ac-4419-b6a3-39652bdc7402/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-07 01:31:16,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:31:16,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:31:16,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:31:17,185 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 01:31:17,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:31:17,418 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 01:31:17,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1374185191] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:31:17,418 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:31:17,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5, 5] total 9 [2021-11-07 01:31:17,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578709476] [2021-11-07 01:31:17,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:31:17,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:31:17,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:31:17,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:31:17,421 INFO L87 Difference]: Start difference. First operand 67812 states and 120348 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 2 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)