./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety/test-0137.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/test-0137.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1c2d362b3c58f37a9b1e964b448eb3d54c85d26676417295a73853b3a7cc716a --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 20:39:45,353 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 20:39:45,356 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 20:39:45,418 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 20:39:45,418 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 20:39:45,423 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 20:39:45,425 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 20:39:45,429 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 20:39:45,432 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 20:39:45,439 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 20:39:45,440 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 20:39:45,442 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 20:39:45,442 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 20:39:45,445 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 20:39:45,447 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 20:39:45,452 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 20:39:45,454 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 20:39:45,455 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 20:39:45,458 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 20:39:45,467 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 20:39:45,469 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 20:39:45,470 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 20:39:45,474 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 20:39:45,475 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 20:39:45,484 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 20:39:45,485 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 20:39:45,486 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 20:39:45,488 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 20:39:45,489 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 20:39:45,490 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 20:39:45,491 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 20:39:45,492 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 20:39:45,494 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 20:39:45,495 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 20:39:45,497 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 20:39:45,497 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 20:39:45,498 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 20:39:45,498 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 20:39:45,498 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 20:39:45,499 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 20:39:45,500 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 20:39:45,501 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-25 20:39:45,551 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 20:39:45,551 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 20:39:45,552 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 20:39:45,552 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 20:39:45,553 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 20:39:45,554 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 20:39:45,554 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 20:39:45,554 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 20:39:45,554 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 20:39:45,555 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 20:39:45,556 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 20:39:45,556 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 20:39:45,556 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 20:39:45,556 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 20:39:45,557 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 20:39:45,557 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 20:39:45,557 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 20:39:45,558 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 20:39:45,558 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-25 20:39:45,559 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-25 20:39:45,559 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 20:39:45,559 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 20:39:45,559 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-25 20:39:45,561 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 20:39:45,561 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 20:39:45,562 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 20:39:45,562 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-25 20:39:45,562 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-25 20:39:45,562 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-25 20:39:45,563 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 20:39:45,563 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-25 20:39:45,563 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 20:39:45,563 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 20:39:45,564 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 20:39:45,564 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 20:39:45,564 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:39:45,564 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 20:39:45,565 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 20:39:45,565 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 20:39:45,565 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 20:39:45,565 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 20:39:45,566 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 20:39:45,566 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_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1c2d362b3c58f37a9b1e964b448eb3d54c85d26676417295a73853b3a7cc716a [2021-11-25 20:39:45,873 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 20:39:45,908 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 20:39:45,911 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 20:39:45,912 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 20:39:45,913 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 20:39:45,915 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/memsafety/test-0137.i [2021-11-25 20:39:45,984 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/data/7d179af63/0e98854619f440f398dc9108238e1884/FLAG51c3c363d [2021-11-25 20:39:46,554 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 20:39:46,555 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/sv-benchmarks/c/memsafety/test-0137.i [2021-11-25 20:39:46,570 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/data/7d179af63/0e98854619f440f398dc9108238e1884/FLAG51c3c363d [2021-11-25 20:39:46,855 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/data/7d179af63/0e98854619f440f398dc9108238e1884 [2021-11-25 20:39:46,858 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 20:39:46,860 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 20:39:46,862 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 20:39:46,862 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 20:39:46,866 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 20:39:46,867 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:39:46" (1/1) ... [2021-11-25 20:39:46,869 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29a31a28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:39:46, skipping insertion in model container [2021-11-25 20:39:46,869 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:39:46" (1/1) ... [2021-11-25 20:39:46,878 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 20:39:46,919 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 20:39:47,307 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:39:47,317 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) [2021-11-25 20:39:47,318 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3e347428 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:39:47, skipping insertion in model container [2021-11-25 20:39:47,318 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 20:39:47,319 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-25 20:39:47,321 INFO L158 Benchmark]: Toolchain (without parser) took 460.15ms. Allocated memory is still 104.9MB. Free memory was 64.0MB in the beginning and 77.0MB in the end (delta: -13.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-25 20:39:47,322 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 104.9MB. Free memory is still 82.4MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 20:39:47,323 INFO L158 Benchmark]: CACSL2BoogieTranslator took 456.75ms. Allocated memory is still 104.9MB. Free memory was 63.8MB in the beginning and 77.4MB in the end (delta: -13.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-25 20:39:47,325 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 104.9MB. Free memory is still 82.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 456.75ms. Allocated memory is still 104.9MB. Free memory was 63.8MB in the beginning and 77.4MB in the end (delta: -13.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 585]: 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_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/test-0137.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1c2d362b3c58f37a9b1e964b448eb3d54c85d26676417295a73853b3a7cc716a --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 20:39:49,697 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 20:39:49,701 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 20:39:49,768 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 20:39:49,769 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 20:39:49,774 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 20:39:49,776 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 20:39:49,780 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 20:39:49,784 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 20:39:49,792 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 20:39:49,793 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 20:39:49,795 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 20:39:49,796 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 20:39:49,799 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 20:39:49,802 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 20:39:49,808 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 20:39:49,810 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 20:39:49,811 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 20:39:49,816 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 20:39:49,826 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 20:39:49,830 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 20:39:49,831 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 20:39:49,834 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 20:39:49,835 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 20:39:49,839 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 20:39:49,839 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 20:39:49,840 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 20:39:49,841 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 20:39:49,841 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 20:39:49,842 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 20:39:49,843 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 20:39:49,843 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 20:39:49,844 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 20:39:49,845 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 20:39:49,846 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 20:39:49,846 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 20:39:49,847 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 20:39:49,847 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 20:39:49,847 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 20:39:49,848 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 20:39:49,849 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 20:39:49,854 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-25 20:39:49,905 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 20:39:49,905 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 20:39:49,906 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 20:39:49,906 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 20:39:49,907 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 20:39:49,908 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 20:39:49,908 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 20:39:49,908 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 20:39:49,909 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 20:39:49,909 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 20:39:49,910 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 20:39:49,910 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 20:39:49,912 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-25 20:39:49,912 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-25 20:39:49,912 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 20:39:49,913 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 20:39:49,913 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-25 20:39:49,913 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 20:39:49,914 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 20:39:49,914 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 20:39:49,914 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-25 20:39:49,914 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-25 20:39:49,915 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-25 20:39:49,915 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 20:39:49,915 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-25 20:39:49,915 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-25 20:39:49,916 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-25 20:39:49,916 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 20:39:49,916 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 20:39:49,917 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 20:39:49,917 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-25 20:39:49,918 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 20:39:49,918 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:39:49,918 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 20:39:49,919 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 20:39:49,919 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-25 20:39:49,919 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-25 20:39:49,919 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 20:39:49,920 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 20:39:49,920 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_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1c2d362b3c58f37a9b1e964b448eb3d54c85d26676417295a73853b3a7cc716a [2021-11-25 20:39:50,335 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 20:39:50,364 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 20:39:50,368 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 20:39:50,369 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 20:39:50,370 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 20:39:50,372 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/memsafety/test-0137.i [2021-11-25 20:39:50,454 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/data/fc789b091/1c54fe552652461c8076805fca6fb257/FLAG4da19958a [2021-11-25 20:39:51,122 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 20:39:51,123 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/sv-benchmarks/c/memsafety/test-0137.i [2021-11-25 20:39:51,138 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/data/fc789b091/1c54fe552652461c8076805fca6fb257/FLAG4da19958a [2021-11-25 20:39:51,360 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/data/fc789b091/1c54fe552652461c8076805fca6fb257 [2021-11-25 20:39:51,362 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 20:39:51,364 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 20:39:51,365 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 20:39:51,365 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 20:39:51,383 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 20:39:51,385 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:39:51" (1/1) ... [2021-11-25 20:39:51,386 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ffdf57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:39:51, skipping insertion in model container [2021-11-25 20:39:51,387 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:39:51" (1/1) ... [2021-11-25 20:39:51,396 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 20:39:51,468 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 20:39:51,891 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:39:51,924 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-25 20:39:51,941 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 20:39:52,025 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:39:52,047 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 20:39:52,116 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:39:52,182 INFO L208 MainTranslator]: Completed translation [2021-11-25 20:39:52,182 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:39:52 WrapperNode [2021-11-25 20:39:52,183 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 20:39:52,185 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 20:39:52,185 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 20:39:52,185 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 20:39:52,193 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:39:52" (1/1) ... [2021-11-25 20:39:52,233 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:39:52" (1/1) ... [2021-11-25 20:39:52,284 INFO L137 Inliner]: procedures = 140, calls = 60, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 137 [2021-11-25 20:39:52,285 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 20:39:52,286 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 20:39:52,286 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 20:39:52,286 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 20:39:52,295 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:39:52" (1/1) ... [2021-11-25 20:39:52,296 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:39:52" (1/1) ... [2021-11-25 20:39:52,316 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:39:52" (1/1) ... [2021-11-25 20:39:52,317 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:39:52" (1/1) ... [2021-11-25 20:39:52,344 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:39:52" (1/1) ... [2021-11-25 20:39:52,358 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:39:52" (1/1) ... [2021-11-25 20:39:52,361 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:39:52" (1/1) ... [2021-11-25 20:39:52,371 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 20:39:52,372 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 20:39:52,384 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 20:39:52,385 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 20:39:52,386 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:39:52" (1/1) ... [2021-11-25 20:39:52,393 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:39:52,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:39:52,421 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 20:39:52,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 20:39:52,476 INFO L130 BoogieDeclarations]: Found specification of procedure list_empty [2021-11-25 20:39:52,476 INFO L138 BoogieDeclarations]: Found implementation of procedure list_empty [2021-11-25 20:39:52,482 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-25 20:39:52,482 INFO L130 BoogieDeclarations]: Found specification of procedure __list_del [2021-11-25 20:39:52,482 INFO L138 BoogieDeclarations]: Found implementation of procedure __list_del [2021-11-25 20:39:52,482 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-25 20:39:52,482 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 20:39:52,482 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 20:39:52,482 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-25 20:39:52,483 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-25 20:39:52,483 INFO L130 BoogieDeclarations]: Found specification of procedure list_add [2021-11-25 20:39:52,483 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add [2021-11-25 20:39:52,483 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 20:39:52,483 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-25 20:39:52,483 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-25 20:39:52,483 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-25 20:39:52,483 INFO L130 BoogieDeclarations]: Found specification of procedure val_from_node [2021-11-25 20:39:52,483 INFO L138 BoogieDeclarations]: Found implementation of procedure val_from_node [2021-11-25 20:39:52,483 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 20:39:52,483 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 20:39:52,644 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 20:39:52,658 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 20:39:53,384 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 20:39:53,393 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 20:39:53,393 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-25 20:39:53,396 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:39:53 BoogieIcfgContainer [2021-11-25 20:39:53,396 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 20:39:53,398 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 20:39:53,398 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 20:39:53,402 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 20:39:53,402 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:39:51" (1/3) ... [2021-11-25 20:39:53,403 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4521bb8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:39:53, skipping insertion in model container [2021-11-25 20:39:53,403 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:39:52" (2/3) ... [2021-11-25 20:39:53,403 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4521bb8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:39:53, skipping insertion in model container [2021-11-25 20:39:53,404 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:39:53" (3/3) ... [2021-11-25 20:39:53,405 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0137.i [2021-11-25 20:39:53,411 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 20:39:53,412 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 56 error locations. [2021-11-25 20:39:53,464 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 20:39:53,472 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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 [2021-11-25 20:39:53,473 INFO L340 AbstractCegarLoop]: Starting to check reachability of 56 error locations. [2021-11-25 20:39:53,493 INFO L276 IsEmpty]: Start isEmpty. Operand has 141 states, 73 states have (on average 1.9315068493150684) internal successors, (141), 129 states have internal predecessors, (141), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-25 20:39:53,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-25 20:39:53,500 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:39:53,501 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-25 20:39:53,501 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [val_from_nodeErr0REQUIRES_VIOLATION, val_from_nodeErr1REQUIRES_VIOLATION, list_emptyErr0REQUIRES_VIOLATION, list_emptyErr1REQUIRES_VIOLATION (and 52 more)] === [2021-11-25 20:39:53,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:39:53,508 INFO L85 PathProgramCache]: Analyzing trace with hash 66866992, now seen corresponding path program 1 times [2021-11-25 20:39:53,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:39:53,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1688008490] [2021-11-25 20:39:53,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:39:53,546 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:39:53,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:39:53,558 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:39:53,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-25 20:39:53,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:39:53,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-25 20:39:53,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:39:53,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:39:53,695 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:39:53,696 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:39:53,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1688008490] [2021-11-25 20:39:53,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1688008490] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:39:53,697 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:39:53,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 20:39:53,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433756091] [2021-11-25 20:39:53,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:39:53,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-25 20:39:53,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:39:53,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-25 20:39:53,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-25 20:39:53,753 INFO L87 Difference]: Start difference. First operand has 141 states, 73 states have (on average 1.9315068493150684) internal successors, (141), 129 states have internal predecessors, (141), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:39:53,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:39:53,796 INFO L93 Difference]: Finished difference Result 141 states and 150 transitions. [2021-11-25 20:39:53,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-25 20:39:53,799 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2021-11-25 20:39:53,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:39:53,812 INFO L225 Difference]: With dead ends: 141 [2021-11-25 20:39:53,812 INFO L226 Difference]: Without dead ends: 139 [2021-11-25 20:39:53,814 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-25 20:39:53,819 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:39:53,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:39:53,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-11-25 20:39:53,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2021-11-25 20:39:53,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 72 states have (on average 1.8611111111111112) internal successors, (134), 127 states have internal predecessors, (134), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-25 20:39:53,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 148 transitions. [2021-11-25 20:39:53,907 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 148 transitions. Word has length 5 [2021-11-25 20:39:53,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:39:53,907 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 148 transitions. [2021-11-25 20:39:53,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:39:53,909 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 148 transitions. [2021-11-25 20:39:53,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-25 20:39:53,909 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:39:53,909 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-25 20:39:53,924 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-25 20:39:54,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:39:54,122 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [val_from_nodeErr0REQUIRES_VIOLATION, val_from_nodeErr1REQUIRES_VIOLATION, list_emptyErr0REQUIRES_VIOLATION, list_emptyErr1REQUIRES_VIOLATION (and 52 more)] === [2021-11-25 20:39:54,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:39:54,123 INFO L85 PathProgramCache]: Analyzing trace with hash 66867054, now seen corresponding path program 1 times [2021-11-25 20:39:54,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:39:54,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1701708010] [2021-11-25 20:39:54,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:39:54,124 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:39:54,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:39:54,126 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:39:54,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-25 20:39:54,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:39:54,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 20:39:54,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:39:54,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:39:54,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:39:54,299 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:39:54,300 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:39:54,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1701708010] [2021-11-25 20:39:54,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1701708010] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:39:54,302 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:39:54,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 20:39:54,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709700976] [2021-11-25 20:39:54,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:39:54,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:39:54,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:39:54,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:39:54,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:39:54,316 INFO L87 Difference]: Start difference. First operand 139 states and 148 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:39:54,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:39:54,638 INFO L93 Difference]: Finished difference Result 161 states and 170 transitions. [2021-11-25 20:39:54,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:39:54,638 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2021-11-25 20:39:54,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:39:54,640 INFO L225 Difference]: With dead ends: 161 [2021-11-25 20:39:54,641 INFO L226 Difference]: Without dead ends: 161 [2021-11-25 20:39:54,641 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:39:54,642 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 87 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 20:39:54,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 141 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 20:39:54,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-11-25 20:39:54,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 138. [2021-11-25 20:39:54,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 72 states have (on average 1.8472222222222223) internal successors, (133), 126 states have internal predecessors, (133), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-25 20:39:54,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 147 transitions. [2021-11-25 20:39:54,670 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 147 transitions. Word has length 5 [2021-11-25 20:39:54,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:39:54,671 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 147 transitions. [2021-11-25 20:39:54,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:39:54,671 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 147 transitions. [2021-11-25 20:39:54,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-25 20:39:54,671 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:39:54,672 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-25 20:39:54,687 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-25 20:39:54,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:39:54,873 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [val_from_nodeErr0REQUIRES_VIOLATION, val_from_nodeErr1REQUIRES_VIOLATION, list_emptyErr0REQUIRES_VIOLATION, list_emptyErr1REQUIRES_VIOLATION (and 52 more)] === [2021-11-25 20:39:54,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:39:54,873 INFO L85 PathProgramCache]: Analyzing trace with hash 66867055, now seen corresponding path program 1 times [2021-11-25 20:39:54,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:39:54,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1394060848] [2021-11-25 20:39:54,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:39:54,875 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:39:54,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:39:54,876 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:39:54,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-25 20:39:54,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:39:54,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 20:39:54,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:39:54,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:39:54,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:39:54,992 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:39:54,992 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:39:54,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1394060848] [2021-11-25 20:39:54,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1394060848] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:39:54,992 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:39:54,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 20:39:54,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747869020] [2021-11-25 20:39:54,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:39:54,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:39:54,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:39:54,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:39:54,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:39:54,995 INFO L87 Difference]: Start difference. First operand 138 states and 147 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:39:55,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:39:55,308 INFO L93 Difference]: Finished difference Result 160 states and 169 transitions. [2021-11-25 20:39:55,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:39:55,309 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2021-11-25 20:39:55,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:39:55,311 INFO L225 Difference]: With dead ends: 160 [2021-11-25 20:39:55,311 INFO L226 Difference]: Without dead ends: 160 [2021-11-25 20:39:55,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:39:55,313 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 28 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 20:39:55,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 219 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 20:39:55,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-11-25 20:39:55,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 137. [2021-11-25 20:39:55,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 72 states have (on average 1.8333333333333333) internal successors, (132), 125 states have internal predecessors, (132), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-25 20:39:55,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 146 transitions. [2021-11-25 20:39:55,325 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 146 transitions. Word has length 5 [2021-11-25 20:39:55,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:39:55,325 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 146 transitions. [2021-11-25 20:39:55,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:39:55,325 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 146 transitions. [2021-11-25 20:39:55,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-25 20:39:55,326 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:39:55,326 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:39:55,344 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-25 20:39:55,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:39:55,542 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting list_addErr0REQUIRES_VIOLATION === [val_from_nodeErr0REQUIRES_VIOLATION, val_from_nodeErr1REQUIRES_VIOLATION, list_emptyErr0REQUIRES_VIOLATION, list_emptyErr1REQUIRES_VIOLATION (and 52 more)] === [2021-11-25 20:39:55,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:39:55,544 INFO L85 PathProgramCache]: Analyzing trace with hash -828252735, now seen corresponding path program 1 times [2021-11-25 20:39:55,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:39:55,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [665117560] [2021-11-25 20:39:55,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:39:55,545 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:39:55,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:39:55,546 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:39:55,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-25 20:39:55,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:39:55,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 20:39:55,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:39:55,755 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-25 20:39:55,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 21 [2021-11-25 20:39:55,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:39:55,873 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:39:55,874 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:39:55,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [665117560] [2021-11-25 20:39:55,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [665117560] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:39:55,878 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:39:55,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:39:55,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518592822] [2021-11-25 20:39:55,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:39:55,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:39:55,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:39:55,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:39:55,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:39:55,882 INFO L87 Difference]: Start difference. First operand 137 states and 146 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:39:56,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:39:56,432 INFO L93 Difference]: Finished difference Result 173 states and 181 transitions. [2021-11-25 20:39:56,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:39:56,433 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-25 20:39:56,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:39:56,434 INFO L225 Difference]: With dead ends: 173 [2021-11-25 20:39:56,434 INFO L226 Difference]: Without dead ends: 173 [2021-11-25 20:39:56,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:39:56,436 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 185 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 20:39:56,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 216 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 20:39:56,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-11-25 20:39:56,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 150. [2021-11-25 20:39:56,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 87 states have (on average 1.8160919540229885) internal successors, (158), 137 states have internal predecessors, (158), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-25 20:39:56,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 172 transitions. [2021-11-25 20:39:56,448 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 172 transitions. Word has length 8 [2021-11-25 20:39:56,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:39:56,448 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 172 transitions. [2021-11-25 20:39:56,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:39:56,449 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 172 transitions. [2021-11-25 20:39:56,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-25 20:39:56,449 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:39:56,449 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:39:56,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-25 20:39:56,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:39:56,662 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting list_addErr1REQUIRES_VIOLATION === [val_from_nodeErr0REQUIRES_VIOLATION, val_from_nodeErr1REQUIRES_VIOLATION, list_emptyErr0REQUIRES_VIOLATION, list_emptyErr1REQUIRES_VIOLATION (and 52 more)] === [2021-11-25 20:39:56,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:39:56,663 INFO L85 PathProgramCache]: Analyzing trace with hash -828252734, now seen corresponding path program 1 times [2021-11-25 20:39:56,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:39:56,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [766414767] [2021-11-25 20:39:56,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:39:56,664 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:39:56,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:39:56,666 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:39:56,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-25 20:39:56,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:39:56,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-25 20:39:56,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:39:56,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:39:56,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 20:39:56,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:39:56,976 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:39:56,976 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:39:56,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [766414767] [2021-11-25 20:39:56,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [766414767] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:39:56,977 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:39:56,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:39:56,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633322924] [2021-11-25 20:39:56,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:39:56,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 20:39:56,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:39:56,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 20:39:56,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:39:56,979 INFO L87 Difference]: Start difference. First operand 150 states and 172 transitions. Second operand has 6 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:39:57,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:39:57,617 INFO L93 Difference]: Finished difference Result 152 states and 163 transitions. [2021-11-25 20:39:57,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 20:39:57,622 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-25 20:39:57,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:39:57,623 INFO L225 Difference]: With dead ends: 152 [2021-11-25 20:39:57,623 INFO L226 Difference]: Without dead ends: 152 [2021-11-25 20:39:57,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:39:57,625 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 182 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-25 20:39:57,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 148 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-25 20:39:57,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-11-25 20:39:57,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 140. [2021-11-25 20:39:57,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 83 states have (on average 1.7108433734939759) internal successors, (142), 127 states have internal predecessors, (142), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-25 20:39:57,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 156 transitions. [2021-11-25 20:39:57,653 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 156 transitions. Word has length 8 [2021-11-25 20:39:57,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:39:57,654 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 156 transitions. [2021-11-25 20:39:57,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:39:57,655 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 156 transitions. [2021-11-25 20:39:57,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-25 20:39:57,656 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:39:57,656 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:39:57,672 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-25 20:39:57,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:39:57,869 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting list_addErr2REQUIRES_VIOLATION === [val_from_nodeErr0REQUIRES_VIOLATION, val_from_nodeErr1REQUIRES_VIOLATION, list_emptyErr0REQUIRES_VIOLATION, list_emptyErr1REQUIRES_VIOLATION (and 52 more)] === [2021-11-25 20:39:57,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:39:57,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1381928766, now seen corresponding path program 1 times [2021-11-25 20:39:57,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:39:57,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [11603558] [2021-11-25 20:39:57,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:39:57,871 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:39:57,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:39:57,872 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:39:57,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-25 20:39:57,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:39:57,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-25 20:39:57,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:39:58,073 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-11-25 20:39:58,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 20 [2021-11-25 20:39:58,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-25 20:39:58,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 20:39:58,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:39:58,298 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:39:58,298 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:39:58,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [11603558] [2021-11-25 20:39:58,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [11603558] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:39:58,299 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:39:58,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 20:39:58,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301441835] [2021-11-25 20:39:58,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:39:58,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 20:39:58,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:39:58,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 20:39:58,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-25 20:39:58,301 INFO L87 Difference]: Start difference. First operand 140 states and 156 transitions. Second operand has 9 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:39:58,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:39:58,977 INFO L93 Difference]: Finished difference Result 161 states and 177 transitions. [2021-11-25 20:39:58,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-25 20:39:58,978 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-25 20:39:58,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:39:58,980 INFO L225 Difference]: With dead ends: 161 [2021-11-25 20:39:58,980 INFO L226 Difference]: Without dead ends: 161 [2021-11-25 20:39:58,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-11-25 20:39:58,981 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 41 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 20:39:58,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 579 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 20:39:58,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-11-25 20:39:58,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 154. [2021-11-25 20:39:58,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 95 states have (on average 1.694736842105263) internal successors, (161), 140 states have internal predecessors, (161), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-25 20:39:58,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 177 transitions. [2021-11-25 20:39:58,991 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 177 transitions. Word has length 10 [2021-11-25 20:39:58,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:39:58,992 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 177 transitions. [2021-11-25 20:39:58,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:39:58,992 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 177 transitions. [2021-11-25 20:39:58,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-25 20:39:58,993 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:39:58,993 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:39:59,007 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-11-25 20:39:59,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:39:59,205 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting list_addErr3REQUIRES_VIOLATION === [val_from_nodeErr0REQUIRES_VIOLATION, val_from_nodeErr1REQUIRES_VIOLATION, list_emptyErr0REQUIRES_VIOLATION, list_emptyErr1REQUIRES_VIOLATION (and 52 more)] === [2021-11-25 20:39:59,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:39:59,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1381928765, now seen corresponding path program 1 times [2021-11-25 20:39:59,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:39:59,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1901826489] [2021-11-25 20:39:59,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:39:59,206 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:39:59,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:39:59,207 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:39:59,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-25 20:39:59,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:39:59,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-25 20:39:59,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:39:59,444 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 20:39:59,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-25 20:39:59,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 20:39:59,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-25 20:39:59,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-25 20:39:59,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 20:39:59,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 20:39:59,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:39:59,805 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:39:59,805 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:39:59,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1901826489] [2021-11-25 20:39:59,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1901826489] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:39:59,806 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:39:59,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 20:39:59,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093619098] [2021-11-25 20:39:59,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:39:59,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 20:39:59,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:39:59,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 20:39:59,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-25 20:39:59,807 INFO L87 Difference]: Start difference. First operand 154 states and 177 transitions. Second operand has 9 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:40:00,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:40:00,946 INFO L93 Difference]: Finished difference Result 160 states and 176 transitions. [2021-11-25 20:40:00,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-25 20:40:00,947 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-25 20:40:00,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:40:00,949 INFO L225 Difference]: With dead ends: 160 [2021-11-25 20:40:00,949 INFO L226 Difference]: Without dead ends: 160 [2021-11-25 20:40:00,949 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-11-25 20:40:00,950 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 39 mSDsluCounter, 551 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 672 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-25 20:40:00,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 672 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-25 20:40:00,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-11-25 20:40:00,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 154. [2021-11-25 20:40:00,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 95 states have (on average 1.6842105263157894) internal successors, (160), 140 states have internal predecessors, (160), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-25 20:40:00,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 176 transitions. [2021-11-25 20:40:00,959 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 176 transitions. Word has length 10 [2021-11-25 20:40:00,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:40:00,960 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 176 transitions. [2021-11-25 20:40:00,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:40:00,960 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 176 transitions. [2021-11-25 20:40:00,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-25 20:40:00,961 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:40:00,961 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:40:00,982 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-25 20:40:01,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:40:01,183 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting list_addErr4REQUIRES_VIOLATION === [val_from_nodeErr0REQUIRES_VIOLATION, val_from_nodeErr1REQUIRES_VIOLATION, list_emptyErr0REQUIRES_VIOLATION, list_emptyErr1REQUIRES_VIOLATION (and 52 more)] === [2021-11-25 20:40:01,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:40:01,183 INFO L85 PathProgramCache]: Analyzing trace with hash 109881212, now seen corresponding path program 1 times [2021-11-25 20:40:01,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:40:01,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1071946816] [2021-11-25 20:40:01,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:40:01,184 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:40:01,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:40:01,186 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:40:01,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-25 20:40:01,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:40:01,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 20:40:01,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:40:01,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:40:01,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:40:01,379 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:40:01,379 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:40:01,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1071946816] [2021-11-25 20:40:01,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1071946816] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:40:01,380 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:40:01,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:40:01,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831962110] [2021-11-25 20:40:01,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:40:01,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 20:40:01,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:40:01,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 20:40:01,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:40:01,382 INFO L87 Difference]: Start difference. First operand 154 states and 176 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:40:01,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:40:01,902 INFO L93 Difference]: Finished difference Result 175 states and 187 transitions. [2021-11-25 20:40:01,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 20:40:01,903 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-25 20:40:01,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:40:01,904 INFO L225 Difference]: With dead ends: 175 [2021-11-25 20:40:01,905 INFO L226 Difference]: Without dead ends: 175 [2021-11-25 20:40:01,905 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:40:01,906 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 121 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 20:40:01,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 306 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 20:40:01,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-11-25 20:40:01,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 153. [2021-11-25 20:40:01,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 95 states have (on average 1.631578947368421) internal successors, (155), 139 states have internal predecessors, (155), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-25 20:40:01,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 171 transitions. [2021-11-25 20:40:01,912 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 171 transitions. Word has length 11 [2021-11-25 20:40:01,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:40:01,913 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 171 transitions. [2021-11-25 20:40:01,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:40:01,913 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 171 transitions. [2021-11-25 20:40:01,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-25 20:40:01,914 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:40:01,914 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:40:01,925 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-25 20:40:02,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:40:02,122 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting list_addErr5REQUIRES_VIOLATION === [val_from_nodeErr0REQUIRES_VIOLATION, val_from_nodeErr1REQUIRES_VIOLATION, list_emptyErr0REQUIRES_VIOLATION, list_emptyErr1REQUIRES_VIOLATION (and 52 more)] === [2021-11-25 20:40:02,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:40:02,122 INFO L85 PathProgramCache]: Analyzing trace with hash 109881213, now seen corresponding path program 1 times [2021-11-25 20:40:02,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:40:02,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1612365983] [2021-11-25 20:40:02,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:40:02,123 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:40:02,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:40:02,124 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:40:02,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-25 20:40:02,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:40:02,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 20:40:02,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:40:02,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:40:02,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:40:02,349 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:40:02,349 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:40:02,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1612365983] [2021-11-25 20:40:02,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1612365983] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:40:02,350 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:40:02,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:40:02,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435200514] [2021-11-25 20:40:02,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:40:02,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 20:40:02,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:40:02,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 20:40:02,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:40:02,351 INFO L87 Difference]: Start difference. First operand 153 states and 171 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:40:02,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:40:02,914 INFO L93 Difference]: Finished difference Result 175 states and 185 transitions. [2021-11-25 20:40:02,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 20:40:02,915 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-25 20:40:02,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:40:02,917 INFO L225 Difference]: With dead ends: 175 [2021-11-25 20:40:02,917 INFO L226 Difference]: Without dead ends: 175 [2021-11-25 20:40:02,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:40:02,918 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 57 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 20:40:02,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 433 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 20:40:02,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-11-25 20:40:02,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 153. [2021-11-25 20:40:02,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 95 states have (on average 1.5894736842105264) internal successors, (151), 139 states have internal predecessors, (151), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-25 20:40:02,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 167 transitions. [2021-11-25 20:40:02,926 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 167 transitions. Word has length 11 [2021-11-25 20:40:02,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:40:02,926 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 167 transitions. [2021-11-25 20:40:02,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:40:02,927 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 167 transitions. [2021-11-25 20:40:02,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-25 20:40:02,927 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:40:02,927 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:40:02,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-25 20:40:03,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:40:03,128 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting list_addErr8REQUIRES_VIOLATION === [val_from_nodeErr0REQUIRES_VIOLATION, val_from_nodeErr1REQUIRES_VIOLATION, list_emptyErr0REQUIRES_VIOLATION, list_emptyErr1REQUIRES_VIOLATION (and 52 more)] === [2021-11-25 20:40:03,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:40:03,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1778337633, now seen corresponding path program 1 times [2021-11-25 20:40:03,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:40:03,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [100546583] [2021-11-25 20:40:03,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:40:03,129 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:40:03,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:40:03,131 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:40:03,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-25 20:40:03,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:40:03,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 20:40:03,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:40:03,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:40:03,293 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:40:03,294 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:40:03,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [100546583] [2021-11-25 20:40:03,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [100546583] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:40:03,294 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:40:03,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:40:03,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830004055] [2021-11-25 20:40:03,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:40:03,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:40:03,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:40:03,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:40:03,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:40:03,296 INFO L87 Difference]: Start difference. First operand 153 states and 167 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:40:03,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:40:03,532 INFO L93 Difference]: Finished difference Result 152 states and 164 transitions. [2021-11-25 20:40:03,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 20:40:03,533 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-25 20:40:03,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:40:03,534 INFO L225 Difference]: With dead ends: 152 [2021-11-25 20:40:03,534 INFO L226 Difference]: Without dead ends: 152 [2021-11-25 20:40:03,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:40:03,535 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 22 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:40:03,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 271 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 20:40:03,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-11-25 20:40:03,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2021-11-25 20:40:03,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 95 states have (on average 1.5578947368421052) internal successors, (148), 138 states have internal predecessors, (148), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-25 20:40:03,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 164 transitions. [2021-11-25 20:40:03,545 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 164 transitions. Word has length 13 [2021-11-25 20:40:03,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:40:03,546 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 164 transitions. [2021-11-25 20:40:03,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:40:03,546 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 164 transitions. [2021-11-25 20:40:03,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-25 20:40:03,547 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:40:03,548 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:40:03,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-25 20:40:03,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:40:03,761 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting list_addErr9REQUIRES_VIOLATION === [val_from_nodeErr0REQUIRES_VIOLATION, val_from_nodeErr1REQUIRES_VIOLATION, list_emptyErr0REQUIRES_VIOLATION, list_emptyErr1REQUIRES_VIOLATION (and 52 more)] === [2021-11-25 20:40:03,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:40:03,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1778337632, now seen corresponding path program 1 times [2021-11-25 20:40:03,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:40:03,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [162391620] [2021-11-25 20:40:03,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:40:03,763 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:40:03,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:40:03,764 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:40:03,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-25 20:40:03,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:40:03,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-25 20:40:03,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:40:04,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:40:04,009 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:40:04,010 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:40:04,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [162391620] [2021-11-25 20:40:04,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [162391620] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:40:04,010 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:40:04,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:40:04,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333832273] [2021-11-25 20:40:04,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:40:04,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 20:40:04,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:40:04,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 20:40:04,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:40:04,012 INFO L87 Difference]: Start difference. First operand 152 states and 164 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:40:04,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:40:04,583 INFO L93 Difference]: Finished difference Result 154 states and 162 transitions. [2021-11-25 20:40:04,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 20:40:04,584 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-25 20:40:04,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:40:04,585 INFO L225 Difference]: With dead ends: 154 [2021-11-25 20:40:04,585 INFO L226 Difference]: Without dead ends: 154 [2021-11-25 20:40:04,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-25 20:40:04,587 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 166 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 20:40:04,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 521 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 20:40:04,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-11-25 20:40:04,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 152. [2021-11-25 20:40:04,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 95 states have (on average 1.5368421052631578) internal successors, (146), 138 states have internal predecessors, (146), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-25 20:40:04,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 162 transitions. [2021-11-25 20:40:04,594 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 162 transitions. Word has length 13 [2021-11-25 20:40:04,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:40:04,595 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 162 transitions. [2021-11-25 20:40:04,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:40:04,595 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 162 transitions. [2021-11-25 20:40:04,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-25 20:40:04,596 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:40:04,596 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:40:04,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-25 20:40:04,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:40:04,806 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting list_emptyErr0REQUIRES_VIOLATION === [val_from_nodeErr0REQUIRES_VIOLATION, val_from_nodeErr1REQUIRES_VIOLATION, list_emptyErr0REQUIRES_VIOLATION, list_emptyErr1REQUIRES_VIOLATION (and 52 more)] === [2021-11-25 20:40:04,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:40:04,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1358598366, now seen corresponding path program 1 times [2021-11-25 20:40:04,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:40:04,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [771484570] [2021-11-25 20:40:04,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:40:04,807 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:40:04,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:40:04,808 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:40:04,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-25 20:40:04,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:40:04,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 20:40:04,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:40:05,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:40:05,060 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:40:05,060 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:40:05,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [771484570] [2021-11-25 20:40:05,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [771484570] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:40:05,060 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:40:05,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 20:40:05,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442282728] [2021-11-25 20:40:05,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:40:05,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 20:40:05,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:40:05,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 20:40:05,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:40:05,063 INFO L87 Difference]: Start difference. First operand 152 states and 162 transitions. Second operand has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 20:40:05,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:40:05,679 INFO L93 Difference]: Finished difference Result 151 states and 161 transitions. [2021-11-25 20:40:05,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 20:40:05,679 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2021-11-25 20:40:05,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:40:05,681 INFO L225 Difference]: With dead ends: 151 [2021-11-25 20:40:05,681 INFO L226 Difference]: Without dead ends: 151 [2021-11-25 20:40:05,681 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-11-25 20:40:05,682 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 156 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 20:40:05,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 309 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 20:40:05,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-11-25 20:40:05,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2021-11-25 20:40:05,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 95 states have (on average 1.5263157894736843) internal successors, (145), 137 states have internal predecessors, (145), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-25 20:40:05,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 161 transitions. [2021-11-25 20:40:05,688 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 161 transitions. Word has length 22 [2021-11-25 20:40:05,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:40:05,689 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 161 transitions. [2021-11-25 20:40:05,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 20:40:05,689 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 161 transitions. [2021-11-25 20:40:05,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-25 20:40:05,690 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:40:05,690 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:40:05,698 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-25 20:40:05,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:40:05,891 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting list_emptyErr1REQUIRES_VIOLATION === [val_from_nodeErr0REQUIRES_VIOLATION, val_from_nodeErr1REQUIRES_VIOLATION, list_emptyErr0REQUIRES_VIOLATION, list_emptyErr1REQUIRES_VIOLATION (and 52 more)] === [2021-11-25 20:40:05,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:40:05,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1358598367, now seen corresponding path program 1 times [2021-11-25 20:40:05,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:40:05,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [975816253] [2021-11-25 20:40:05,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:40:05,892 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:40:05,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:40:05,893 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:40:05,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-25 20:40:06,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:40:06,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-25 20:40:06,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:40:06,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:40:06,281 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:40:06,281 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:40:06,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [975816253] [2021-11-25 20:40:06,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [975816253] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:40:06,282 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:40:06,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 20:40:06,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182769313] [2021-11-25 20:40:06,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:40:06,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 20:40:06,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:40:06,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 20:40:06,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:40:06,283 INFO L87 Difference]: Start difference. First operand 151 states and 161 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 20:40:07,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:40:07,084 INFO L93 Difference]: Finished difference Result 150 states and 160 transitions. [2021-11-25 20:40:07,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 20:40:07,085 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2021-11-25 20:40:07,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:40:07,086 INFO L225 Difference]: With dead ends: 150 [2021-11-25 20:40:07,086 INFO L226 Difference]: Without dead ends: 150 [2021-11-25 20:40:07,087 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-11-25 20:40:07,088 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 253 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-25 20:40:07,088 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 316 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-25 20:40:07,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-11-25 20:40:07,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2021-11-25 20:40:07,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 95 states have (on average 1.5157894736842106) internal successors, (144), 136 states have internal predecessors, (144), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-25 20:40:07,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 160 transitions. [2021-11-25 20:40:07,097 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 160 transitions. Word has length 22 [2021-11-25 20:40:07,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:40:07,097 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 160 transitions. [2021-11-25 20:40:07,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 20:40:07,098 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 160 transitions. [2021-11-25 20:40:07,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-25 20:40:07,099 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:40:07,099 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:40:07,117 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-25 20:40:07,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:40:07,312 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting list_addErr2REQUIRES_VIOLATION === [val_from_nodeErr0REQUIRES_VIOLATION, val_from_nodeErr1REQUIRES_VIOLATION, list_emptyErr0REQUIRES_VIOLATION, list_emptyErr1REQUIRES_VIOLATION (and 52 more)] === [2021-11-25 20:40:07,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:40:07,312 INFO L85 PathProgramCache]: Analyzing trace with hash -868531821, now seen corresponding path program 1 times [2021-11-25 20:40:07,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:40:07,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2041694434] [2021-11-25 20:40:07,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:40:07,314 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:40:07,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:40:07,322 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:40:07,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-25 20:40:07,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:40:07,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-25 20:40:07,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:40:07,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:40:07,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:40:07,979 INFO L354 Elim1Store]: treesize reduction 54, result has 37.9 percent of original size [2021-11-25 20:40:07,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 40 treesize of output 61 [2021-11-25 20:40:08,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 29 [2021-11-25 20:40:08,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2021-11-25 20:40:08,675 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:40:08,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:40:08,901 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_345 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_gl_insert_~node~0#1.base| v_ArrVal_345) |c_~#gl_list~0.base|) |c_~#gl_list~0.offset|))))))))) (_ bv1 1)))) is different from false [2021-11-25 20:40:09,003 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_344 (_ BitVec 1)) (v_ArrVal_345 (Array (_ BitVec 32) (_ BitVec 32))) (|v_ULTIMATE.start_gl_insert_~node~0#1.base_10| (_ BitVec 32))) (or (not (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg v_ArrVal_344))) (_ bv1 1)))) (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_gl_insert_~node~0#1.base_10|))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| |v_ULTIMATE.start_gl_insert_~node~0#1.base_10| v_ArrVal_344) (select (select (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_gl_insert_~node~0#1.base_10| v_ArrVal_345) |c_~#gl_list~0.base|) |c_~#gl_list~0.offset|))))))))) (_ bv1 1))))) is different from false [2021-11-25 20:40:09,404 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:40:09,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 33 [2021-11-25 20:40:09,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:40:09,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-11-25 20:40:09,486 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:40:09,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2041694434] [2021-11-25 20:40:09,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2041694434] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:40:09,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1737490541] [2021-11-25 20:40:09,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:40:09,486 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 20:40:09,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 20:40:09,493 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 20:40:09,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-25 20:40:09,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:40:10,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-25 20:40:10,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:40:10,103 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-25 20:40:10,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 21 [2021-11-25 20:40:10,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:40:11,059 INFO L354 Elim1Store]: treesize reduction 81, result has 35.7 percent of original size [2021-11-25 20:40:11,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 45 treesize of output 76 [2021-11-25 20:40:11,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 30 [2021-11-25 20:40:11,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-11-25 20:40:11,687 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:40:11,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:40:11,720 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_410 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_gl_insert_~node~0#1.base| v_ArrVal_410) |c_~#gl_list~0.base|) |c_~#gl_list~0.offset|))))))))) (_ bv1 1)))) is different from false [2021-11-25 20:40:11,753 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_gl_insert_~node~0#1.base_12| (_ BitVec 32)) (v_ArrVal_410 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_409 (_ BitVec 1))) (or (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| |v_ULTIMATE.start_gl_insert_~node~0#1.base_12| v_ArrVal_409) (select (select (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_gl_insert_~node~0#1.base_12| v_ArrVal_410) |c_~#gl_list~0.base|) |c_~#gl_list~0.offset|)))))))))) (_ bv1 1))) (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_gl_insert_~node~0#1.base_12|))))) is different from false [2021-11-25 20:40:12,026 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:40:12,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 34 [2021-11-25 20:40:12,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:40:12,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-11-25 20:40:14,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1737490541] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:40:14,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337186261] [2021-11-25 20:40:14,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:40:14,143 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:40:14,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:40:14,146 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:40:14,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-25 20:40:14,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:40:14,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-25 20:40:14,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:40:14,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:40:14,523 INFO L354 Elim1Store]: treesize reduction 54, result has 37.9 percent of original size [2021-11-25 20:40:14,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 38 treesize of output 59 [2021-11-25 20:40:14,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 29 [2021-11-25 20:40:14,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-11-25 20:40:14,982 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:40:14,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:40:15,081 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_474 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_gl_insert_~node~0#1.base| v_ArrVal_474) |c_~#gl_list~0.base|) |c_~#gl_list~0.offset|)))))))))))) (_ bv1 1)))) is different from false [2021-11-25 20:40:15,111 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_gl_insert_~node~0#1.base_14| (_ BitVec 32)) (v_ArrVal_474 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_473 (_ BitVec 1))) (or (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| |v_ULTIMATE.start_gl_insert_~node~0#1.base_14| v_ArrVal_473) (select (select (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_gl_insert_~node~0#1.base_14| v_ArrVal_474) |c_~#gl_list~0.base|) |c_~#gl_list~0.offset|)))))))))))))))) (_ bv1 1))) (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_gl_insert_~node~0#1.base_14|))))) is different from false [2021-11-25 20:40:15,355 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:40:15,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 40 [2021-11-25 20:40:15,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:40:15,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-11-25 20:40:17,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337186261] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:40:17,428 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:40:17,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 13] total 31 [2021-11-25 20:40:17,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065084227] [2021-11-25 20:40:17,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:40:17,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-25 20:40:17,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:40:17,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-25 20:40:17,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1247, Unknown=8, NotChecked=462, Total=1892 [2021-11-25 20:40:17,431 INFO L87 Difference]: Start difference. First operand 150 states and 160 transitions. Second operand has 32 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 28 states have internal predecessors, (56), 5 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 20:40:18,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:40:18,020 INFO L93 Difference]: Finished difference Result 150 states and 159 transitions. [2021-11-25 20:40:18,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-25 20:40:18,027 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 28 states have internal predecessors, (56), 5 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2021-11-25 20:40:18,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:40:18,028 INFO L225 Difference]: With dead ends: 150 [2021-11-25 20:40:18,028 INFO L226 Difference]: Without dead ends: 150 [2021-11-25 20:40:18,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 58 SyntacticMatches, 8 SemanticMatches, 48 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=258, Invalid=1650, Unknown=8, NotChecked=534, Total=2450 [2021-11-25 20:40:18,031 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 16 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:40:18,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 337 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 76 Unchecked, 0.1s Time] [2021-11-25 20:40:18,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-11-25 20:40:18,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2021-11-25 20:40:18,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 95 states have (on average 1.5052631578947369) internal successors, (143), 136 states have internal predecessors, (143), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-25 20:40:18,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 159 transitions. [2021-11-25 20:40:18,039 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 159 transitions. Word has length 26 [2021-11-25 20:40:18,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:40:18,040 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 159 transitions. [2021-11-25 20:40:18,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 28 states have internal predecessors, (56), 5 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 20:40:18,040 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 159 transitions. [2021-11-25 20:40:18,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-25 20:40:18,041 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:40:18,041 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:40:18,062 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-25 20:40:18,284 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-25 20:40:18,463 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2021-11-25 20:40:18,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt [2021-11-25 20:40:18,660 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting list_addErr3REQUIRES_VIOLATION === [val_from_nodeErr0REQUIRES_VIOLATION, val_from_nodeErr1REQUIRES_VIOLATION, list_emptyErr0REQUIRES_VIOLATION, list_emptyErr1REQUIRES_VIOLATION (and 52 more)] === [2021-11-25 20:40:18,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:40:18,660 INFO L85 PathProgramCache]: Analyzing trace with hash -868531820, now seen corresponding path program 1 times [2021-11-25 20:40:18,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:40:18,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [29739521] [2021-11-25 20:40:18,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:40:18,661 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:40:18,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:40:18,663 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:40:18,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-25 20:40:18,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:40:18,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-25 20:40:18,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:40:18,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:40:18,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:40:19,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:40:19,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:40:19,472 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-11-25 20:40:19,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 26 [2021-11-25 20:40:19,501 INFO L354 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2021-11-25 20:40:19,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 36 [2021-11-25 20:40:19,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2021-11-25 20:40:19,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-25 20:40:19,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 20:40:19,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-11-25 20:40:19,804 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:40:19,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:40:20,332 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_542 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_543 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_gl_insert_~node~0#1.base| v_ArrVal_542) |c_~#gl_list~0.base|) |c_~#gl_list~0.offset|)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_gl_insert_~node~0#1.base| v_ArrVal_543) |c_~#gl_list~0.base|) |c_~#gl_list~0.offset|)))) (forall ((v_ArrVal_542 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_gl_insert_~node~0#1.base| v_ArrVal_542) |c_~#gl_list~0.base|) |c_~#gl_list~0.offset|))) (bvule (bvadd (_ bv4 32) .cse0) (bvadd (_ bv8 32) .cse0))))) is different from false [2021-11-25 20:40:22,660 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:40:22,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 84 treesize of output 85 [2021-11-25 20:40:22,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:40:22,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 74 [2021-11-25 20:40:22,683 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:40:22,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 54 [2021-11-25 20:40:22,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:40:22,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 29 [2021-11-25 20:40:22,903 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:40:22,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [29739521] [2021-11-25 20:40:22,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [29739521] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:40:22,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1578598110] [2021-11-25 20:40:22,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:40:22,904 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 20:40:22,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 20:40:22,905 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 20:40:22,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-25 20:40:23,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:40:23,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-25 20:40:23,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:40:23,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:40:23,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:40:24,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:40:24,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:40:24,989 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-11-25 20:40:24,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 26 [2021-11-25 20:40:25,033 INFO L354 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2021-11-25 20:40:25,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 37 [2021-11-25 20:40:25,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2021-11-25 20:40:25,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-25 20:40:25,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 20:40:25,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-11-25 20:40:25,604 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:40:25,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:40:25,719 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_615 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_616 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_gl_insert_~node~0#1.base| v_ArrVal_616) |c_~#gl_list~0.base|) |c_~#gl_list~0.offset|)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_gl_insert_~node~0#1.base| v_ArrVal_615) |c_~#gl_list~0.base|) |c_~#gl_list~0.offset|)))) (forall ((v_ArrVal_616 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_gl_insert_~node~0#1.base| v_ArrVal_616) |c_~#gl_list~0.base|) |c_~#gl_list~0.offset|))) (bvule (bvadd (_ bv4 32) .cse0) (bvadd (_ bv8 32) .cse0))))) is different from false [2021-11-25 20:40:31,331 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:40:31,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 84 treesize of output 85 [2021-11-25 20:40:31,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:40:31,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 74 [2021-11-25 20:40:31,354 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:40:31,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 54 [2021-11-25 20:40:31,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:40:31,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 29 [2021-11-25 20:40:31,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1578598110] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:40:31,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166600719] [2021-11-25 20:40:31,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:40:31,657 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:40:31,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:40:31,662 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:40:31,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-25 20:40:31,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:40:31,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-25 20:40:31,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:40:31,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:40:32,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:40:32,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:40:32,329 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-11-25 20:40:32,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 26 [2021-11-25 20:40:32,362 INFO L354 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2021-11-25 20:40:32,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2021-11-25 20:40:32,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-25 20:40:32,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2021-11-25 20:40:32,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 20:40:32,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-11-25 20:40:32,469 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:40:32,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:40:32,581 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_687 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_gl_insert_~node~0#1.base| v_ArrVal_687) |c_~#gl_list~0.base|) |c_~#gl_list~0.offset|))) (bvule (bvadd (_ bv4 32) .cse0) (bvadd (_ bv8 32) .cse0)))) (forall ((v_ArrVal_687 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_688 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_gl_insert_~node~0#1.base| v_ArrVal_687) |c_~#gl_list~0.base|) |c_~#gl_list~0.offset|)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_gl_insert_~node~0#1.base| v_ArrVal_688) |c_~#gl_list~0.base|) |c_~#gl_list~0.offset|))))) is different from false [2021-11-25 20:40:36,609 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:40:36,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 84 treesize of output 85 [2021-11-25 20:40:36,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:40:36,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 74 [2021-11-25 20:40:36,626 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:40:36,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 54 [2021-11-25 20:40:36,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:40:36,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 29 [2021-11-25 20:40:36,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166600719] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:40:36,809 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:40:36,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 15] total 27 [2021-11-25 20:40:36,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413118202] [2021-11-25 20:40:36,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:40:36,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-25 20:40:36,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:40:36,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-25 20:40:36,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1242, Unknown=25, NotChecked=222, Total=1640 [2021-11-25 20:40:36,815 INFO L87 Difference]: Start difference. First operand 150 states and 159 transitions. Second operand has 28 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 20:40:39,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:40:39,384 INFO L93 Difference]: Finished difference Result 210 states and 224 transitions. [2021-11-25 20:40:39,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-25 20:40:39,385 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2021-11-25 20:40:39,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:40:39,386 INFO L225 Difference]: With dead ends: 210 [2021-11-25 20:40:39,386 INFO L226 Difference]: Without dead ends: 210 [2021-11-25 20:40:39,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 66 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=235, Invalid=1644, Unknown=25, NotChecked=258, Total=2162 [2021-11-25 20:40:39,388 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 330 mSDsluCounter, 954 mSDsCounter, 0 mSdLazyCounter, 774 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 1048 SdHoareTripleChecker+Invalid, 1172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 359 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-25 20:40:39,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [330 Valid, 1048 Invalid, 1172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 774 Invalid, 0 Unknown, 359 Unchecked, 1.8s Time] [2021-11-25 20:40:39,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-11-25 20:40:39,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 143. [2021-11-25 20:40:39,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 88 states have (on average 1.5340909090909092) internal successors, (135), 129 states have internal predecessors, (135), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-25 20:40:39,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 151 transitions. [2021-11-25 20:40:39,398 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 151 transitions. Word has length 26 [2021-11-25 20:40:39,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:40:39,399 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 151 transitions. [2021-11-25 20:40:39,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 20:40:39,399 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 151 transitions. [2021-11-25 20:40:39,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-25 20:40:39,400 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:40:39,401 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:40:39,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-25 20:40:39,609 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (19)] Ended with exit code 0 [2021-11-25 20:40:39,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-25 20:40:40,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:40:40,006 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATION === [val_from_nodeErr0REQUIRES_VIOLATION, val_from_nodeErr1REQUIRES_VIOLATION, list_emptyErr0REQUIRES_VIOLATION, list_emptyErr1REQUIRES_VIOLATION (and 52 more)] === [2021-11-25 20:40:40,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:40:40,007 INFO L85 PathProgramCache]: Analyzing trace with hash -414351977, now seen corresponding path program 1 times [2021-11-25 20:40:40,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:40:40,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1847510387] [2021-11-25 20:40:40,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:40:40,008 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:40:40,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:40:40,009 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:40:40,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-25 20:40:40,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:40:40,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-25 20:40:40,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:40:40,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:40:40,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:40:40,629 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:40:40,629 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:40:40,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1847510387] [2021-11-25 20:40:40,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1847510387] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:40:40,630 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:40:40,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-25 20:40:40,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003585806] [2021-11-25 20:40:40,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:40:40,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-25 20:40:40,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:40:40,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-25 20:40:40,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-11-25 20:40:40,632 INFO L87 Difference]: Start difference. First operand 143 states and 151 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 20:40:41,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:40:41,488 INFO L93 Difference]: Finished difference Result 188 states and 201 transitions. [2021-11-25 20:40:41,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-25 20:40:41,489 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 31 [2021-11-25 20:40:41,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:40:41,491 INFO L225 Difference]: With dead ends: 188 [2021-11-25 20:40:41,491 INFO L226 Difference]: Without dead ends: 188 [2021-11-25 20:40:41,491 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-11-25 20:40:41,492 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 217 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 656 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-25 20:40:41,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 656 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-25 20:40:41,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-11-25 20:40:41,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 141. [2021-11-25 20:40:41,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 86 states have (on average 1.5348837209302326) internal successors, (132), 127 states have internal predecessors, (132), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-25 20:40:41,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 148 transitions. [2021-11-25 20:40:41,500 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 148 transitions. Word has length 31 [2021-11-25 20:40:41,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:40:41,501 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 148 transitions. [2021-11-25 20:40:41,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 20:40:41,501 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 148 transitions. [2021-11-25 20:40:41,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-25 20:40:41,502 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:40:41,503 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-25 20:40:41,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-25 20:40:41,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:40:41,716 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [val_from_nodeErr0REQUIRES_VIOLATION, val_from_nodeErr1REQUIRES_VIOLATION, list_emptyErr0REQUIRES_VIOLATION, list_emptyErr1REQUIRES_VIOLATION (and 52 more)] === [2021-11-25 20:40:41,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:40:41,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1582571725, now seen corresponding path program 1 times [2021-11-25 20:40:41,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:40:41,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [950427429] [2021-11-25 20:40:41,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:40:41,717 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:40:41,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:40:41,719 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:40:41,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-25 20:40:41,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:40:41,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-25 20:40:41,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:40:42,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:40:42,536 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 20:40:42,537 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:40:42,537 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:40:42,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [950427429] [2021-11-25 20:40:42,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [950427429] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:40:42,537 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:40:42,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-25 20:40:42,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940774141] [2021-11-25 20:40:42,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:40:42,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-25 20:40:42,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:40:42,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-25 20:40:42,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-11-25 20:40:42,539 INFO L87 Difference]: Start difference. First operand 141 states and 148 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 10 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 20:40:43,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:40:43,435 INFO L93 Difference]: Finished difference Result 188 states and 200 transitions. [2021-11-25 20:40:43,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-25 20:40:43,436 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 10 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2021-11-25 20:40:43,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:40:43,438 INFO L225 Difference]: With dead ends: 188 [2021-11-25 20:40:43,438 INFO L226 Difference]: Without dead ends: 188 [2021-11-25 20:40:43,439 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-11-25 20:40:43,440 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 213 mSDsluCounter, 550 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-25 20:40:43,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 644 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-25 20:40:43,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-11-25 20:40:43,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 142. [2021-11-25 20:40:43,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 87 states have (on average 1.528735632183908) internal successors, (133), 127 states have internal predecessors, (133), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-25 20:40:43,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 149 transitions. [2021-11-25 20:40:43,447 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 149 transitions. Word has length 37 [2021-11-25 20:40:43,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:40:43,448 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 149 transitions. [2021-11-25 20:40:43,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 10 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 20:40:43,448 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 149 transitions. [2021-11-25 20:40:43,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-25 20:40:43,449 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:40:43,450 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-25 20:40:43,462 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-25 20:40:43,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:40:43,662 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting val_from_nodeErr0REQUIRES_VIOLATION === [val_from_nodeErr0REQUIRES_VIOLATION, val_from_nodeErr1REQUIRES_VIOLATION, list_emptyErr0REQUIRES_VIOLATION, list_emptyErr1REQUIRES_VIOLATION (and 52 more)] === [2021-11-25 20:40:43,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:40:43,662 INFO L85 PathProgramCache]: Analyzing trace with hash 456962673, now seen corresponding path program 1 times [2021-11-25 20:40:43,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:40:43,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1343451135] [2021-11-25 20:40:43,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:40:43,663 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:40:43,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:40:43,664 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:40:43,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-25 20:40:43,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:40:43,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-25 20:40:43,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:40:43,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:40:44,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:40:44,220 INFO L354 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2021-11-25 20:40:44,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 41 [2021-11-25 20:40:44,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-11-25 20:40:44,350 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-25 20:40:44,351 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:40:44,351 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:40:44,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1343451135] [2021-11-25 20:40:44,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1343451135] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:40:44,351 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:40:44,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-25 20:40:44,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634232181] [2021-11-25 20:40:44,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:40:44,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-25 20:40:44,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:40:44,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-25 20:40:44,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-25 20:40:44,353 INFO L87 Difference]: Start difference. First operand 142 states and 149 transitions. Second operand has 12 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 20:40:45,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:40:45,310 INFO L93 Difference]: Finished difference Result 344 states and 371 transitions. [2021-11-25 20:40:45,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-25 20:40:45,311 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2021-11-25 20:40:45,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:40:45,313 INFO L225 Difference]: With dead ends: 344 [2021-11-25 20:40:45,313 INFO L226 Difference]: Without dead ends: 344 [2021-11-25 20:40:45,314 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-11-25 20:40:45,314 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 263 mSDsluCounter, 584 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 680 SdHoareTripleChecker+Invalid, 967 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 517 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-25 20:40:45,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 680 Invalid, 967 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 428 Invalid, 0 Unknown, 517 Unchecked, 0.8s Time] [2021-11-25 20:40:45,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-11-25 20:40:45,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 164. [2021-11-25 20:40:45,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 105 states have (on average 1.5142857142857142) internal successors, (159), 145 states have internal predecessors, (159), 10 states have call successors, (10), 8 states have call predecessors, (10), 8 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-25 20:40:45,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 179 transitions. [2021-11-25 20:40:45,322 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 179 transitions. Word has length 39 [2021-11-25 20:40:45,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:40:45,322 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 179 transitions. [2021-11-25 20:40:45,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 20:40:45,323 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 179 transitions. [2021-11-25 20:40:45,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-25 20:40:45,324 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:40:45,324 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-25 20:40:45,340 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-25 20:40:45,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:40:45,537 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting val_from_nodeErr1REQUIRES_VIOLATION === [val_from_nodeErr0REQUIRES_VIOLATION, val_from_nodeErr1REQUIRES_VIOLATION, list_emptyErr0REQUIRES_VIOLATION, list_emptyErr1REQUIRES_VIOLATION (and 52 more)] === [2021-11-25 20:40:45,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:40:45,537 INFO L85 PathProgramCache]: Analyzing trace with hash 456962674, now seen corresponding path program 1 times [2021-11-25 20:40:45,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:40:45,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [940392108] [2021-11-25 20:40:45,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:40:45,538 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:40:45,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:40:45,539 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:40:45,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-25 20:40:45,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:40:45,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-25 20:40:45,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:40:45,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:40:45,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:40:46,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:40:46,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:40:46,452 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-25 20:40:46,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 22 [2021-11-25 20:40:46,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-11-25 20:40:46,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 20:40:46,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-11-25 20:40:46,713 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:40:46,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:40:48,343 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:40:48,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [940392108] [2021-11-25 20:40:48,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [940392108] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:40:48,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [612523548] [2021-11-25 20:40:48,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:40:48,344 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 20:40:48,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 20:40:48,354 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 20:40:48,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-11-25 20:40:48,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:40:48,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-25 20:40:48,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:40:48,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:40:49,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:40:49,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:40:50,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:40:50,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-11-25 20:40:50,624 INFO L354 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2021-11-25 20:40:50,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 24 [2021-11-25 20:40:50,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 20:40:51,060 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:40:51,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:40:53,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [612523548] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:40:53,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416625000] [2021-11-25 20:40:53,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:40:53,467 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:40:53,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:40:53,474 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:40:53,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-25 20:40:53,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:40:53,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-25 20:40:53,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:40:53,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:40:54,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:40:54,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:40:54,244 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-25 20:40:54,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-11-25 20:40:54,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-11-25 20:40:54,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 20:40:54,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-11-25 20:40:54,357 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:40:54,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:40:56,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416625000] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:40:56,656 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:40:56,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 13] total 25 [2021-11-25 20:40:56,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70156040] [2021-11-25 20:40:56,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:40:56,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-25 20:40:56,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:40:56,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-25 20:40:56,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=952, Unknown=1, NotChecked=0, Total=1056 [2021-11-25 20:40:56,659 INFO L87 Difference]: Start difference. First operand 164 states and 179 transitions. Second operand has 26 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 22 states have internal predecessors, (67), 8 states have call successors, (8), 8 states have call predecessors, (8), 6 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-25 20:40:57,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:40:57,799 INFO L93 Difference]: Finished difference Result 172 states and 185 transitions. [2021-11-25 20:40:57,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-25 20:40:57,799 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 22 states have internal predecessors, (67), 8 states have call successors, (8), 8 states have call predecessors, (8), 6 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) Word has length 39 [2021-11-25 20:40:57,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:40:57,801 INFO L225 Difference]: With dead ends: 172 [2021-11-25 20:40:57,801 INFO L226 Difference]: Without dead ends: 172 [2021-11-25 20:40:57,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 132 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=176, Invalid=1463, Unknown=1, NotChecked=0, Total=1640 [2021-11-25 20:40:57,802 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 41 mSDsluCounter, 1150 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 1269 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 394 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 20:40:57,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 1269 Invalid, 659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 259 Invalid, 0 Unknown, 394 Unchecked, 0.5s Time] [2021-11-25 20:40:57,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-11-25 20:40:57,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 169. [2021-11-25 20:40:57,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 109 states have (on average 1.4862385321100917) internal successors, (162), 149 states have internal predecessors, (162), 10 states have call successors, (10), 9 states have call predecessors, (10), 9 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-25 20:40:57,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 182 transitions. [2021-11-25 20:40:57,810 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 182 transitions. Word has length 39 [2021-11-25 20:40:57,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:40:57,810 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 182 transitions. [2021-11-25 20:40:57,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 22 states have internal predecessors, (67), 8 states have call successors, (8), 8 states have call predecessors, (8), 6 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-25 20:40:57,811 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 182 transitions. [2021-11-25 20:40:57,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-25 20:40:57,812 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:40:57,812 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-25 20:40:57,827 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-25 20:40:58,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2021-11-25 20:40:58,252 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-11-25 20:40:58,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:40:58,427 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [val_from_nodeErr0REQUIRES_VIOLATION, val_from_nodeErr1REQUIRES_VIOLATION, list_emptyErr0REQUIRES_VIOLATION, list_emptyErr1REQUIRES_VIOLATION (and 52 more)] === [2021-11-25 20:40:58,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:40:58,428 INFO L85 PathProgramCache]: Analyzing trace with hash 138353381, now seen corresponding path program 1 times [2021-11-25 20:40:58,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:40:58,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [283588985] [2021-11-25 20:40:58,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:40:58,428 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:40:58,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:40:58,429 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:40:58,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-25 20:40:58,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:40:58,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-25 20:40:58,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:40:58,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:40:58,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:40:58,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:40:58,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:40:59,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:40:59,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-11-25 20:40:59,194 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-25 20:40:59,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-11-25 20:40:59,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 20:40:59,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-11-25 20:40:59,485 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:40:59,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:41:02,120 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:41:02,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [283588985] [2021-11-25 20:41:02,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [283588985] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:41:02,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [55912170] [2021-11-25 20:41:02,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:41:02,120 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 20:41:02,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 20:41:02,121 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 20:41:02,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-11-25 20:41:02,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:41:02,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-25 20:41:02,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:41:02,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:41:03,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:41:03,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:41:03,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:41:03,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-11-25 20:41:04,496 INFO L354 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2021-11-25 20:41:04,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 24 [2021-11-25 20:41:04,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 20:41:07,310 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:41:07,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:41:09,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [55912170] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:41:09,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838467855] [2021-11-25 20:41:09,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:41:09,789 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:41:09,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:41:09,790 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:41:09,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-25 20:41:09,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:41:09,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-25 20:41:09,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:41:09,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:41:10,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:41:10,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:41:10,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:41:10,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-11-25 20:41:10,530 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-25 20:41:10,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-11-25 20:41:10,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 20:41:10,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-11-25 20:41:10,699 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:41:10,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:41:11,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838467855] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:41:11,129 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:41:11,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 12] total 23 [2021-11-25 20:41:11,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790887277] [2021-11-25 20:41:11,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:41:11,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-25 20:41:11,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:41:11,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-25 20:41:11,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=698, Unknown=2, NotChecked=0, Total=812 [2021-11-25 20:41:11,131 INFO L87 Difference]: Start difference. First operand 169 states and 182 transitions. Second operand has 24 states, 23 states have (on average 3.260869565217391) internal successors, (75), 22 states have internal predecessors, (75), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-25 20:41:14,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:41:14,555 INFO L93 Difference]: Finished difference Result 172 states and 184 transitions. [2021-11-25 20:41:14,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-25 20:41:14,556 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.260869565217391) internal successors, (75), 22 states have internal predecessors, (75), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) Word has length 44 [2021-11-25 20:41:14,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:41:14,558 INFO L225 Difference]: With dead ends: 172 [2021-11-25 20:41:14,558 INFO L226 Difference]: Without dead ends: 172 [2021-11-25 20:41:14,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 162 SyntacticMatches, 7 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=194, Invalid=1136, Unknown=2, NotChecked=0, Total=1332 [2021-11-25 20:41:14,559 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 61 mSDsluCounter, 669 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 789 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 199 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-25 20:41:14,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 789 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 255 Invalid, 0 Unknown, 199 Unchecked, 0.6s Time] [2021-11-25 20:41:14,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-11-25 20:41:14,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 169. [2021-11-25 20:41:14,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 109 states have (on average 1.4770642201834863) internal successors, (161), 149 states have internal predecessors, (161), 10 states have call successors, (10), 9 states have call predecessors, (10), 9 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-25 20:41:14,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 181 transitions. [2021-11-25 20:41:14,566 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 181 transitions. Word has length 44 [2021-11-25 20:41:14,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:41:14,567 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 181 transitions. [2021-11-25 20:41:14,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.260869565217391) internal successors, (75), 22 states have internal predecessors, (75), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-25 20:41:14,567 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 181 transitions. [2021-11-25 20:41:14,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-25 20:41:14,568 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:41:14,568 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-25 20:41:14,614 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-25 20:41:14,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2021-11-25 20:41:14,996 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-25 20:41:15,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:41:15,186 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting val_from_nodeErr0REQUIRES_VIOLATION === [val_from_nodeErr0REQUIRES_VIOLATION, val_from_nodeErr1REQUIRES_VIOLATION, list_emptyErr0REQUIRES_VIOLATION, list_emptyErr1REQUIRES_VIOLATION (and 52 more)] === [2021-11-25 20:41:15,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:41:15,187 INFO L85 PathProgramCache]: Analyzing trace with hash 770302443, now seen corresponding path program 1 times [2021-11-25 20:41:15,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:41:15,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1992875215] [2021-11-25 20:41:15,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:41:15,187 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:41:15,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:41:15,189 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:41:15,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-25 20:41:15,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:41:15,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-25 20:41:15,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:41:15,517 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 20:41:15,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2021-11-25 20:41:15,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-25 20:41:15,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 20:41:15,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-25 20:41:15,959 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-25 20:41:15,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-11-25 20:41:16,031 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-11-25 20:41:16,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 30 [2021-11-25 20:41:16,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:41:16,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-11-25 20:41:16,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2021-11-25 20:41:16,897 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-25 20:41:16,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 14 [2021-11-25 20:41:17,076 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 20:41:17,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:41:17,531 INFO L354 Elim1Store]: treesize reduction 5, result has 75.0 percent of original size [2021-11-25 20:41:17,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 32 [2021-11-25 20:41:17,808 INFO L354 Elim1Store]: treesize reduction 5, result has 75.0 percent of original size [2021-11-25 20:41:17,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 32 [2021-11-25 20:41:19,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 72 [2021-11-25 20:41:25,513 INFO L354 Elim1Store]: treesize reduction 99, result has 63.7 percent of original size [2021-11-25 20:41:25,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 35460 treesize of output 32501 [2021-11-25 20:41:27,090 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:41:27,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1992875215] [2021-11-25 20:41:27,091 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-25 20:41:27,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [753379786] [2021-11-25 20:41:27,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:41:27,091 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 20:41:27,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 20:41:27,092 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 20:41:27,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2021-11-25 20:41:27,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:41:27,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-25 20:41:27,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:41:27,772 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-11-25 20:41:27,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 25 [2021-11-25 20:41:27,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-25 20:41:27,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 20:41:28,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-25 20:41:28,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:41:28,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2021-11-25 20:41:28,717 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-11-25 20:41:28,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 30 [2021-11-25 20:41:28,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:41:28,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2021-11-25 20:41:29,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 20:41:30,287 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:41:30,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 18 [2021-11-25 20:41:30,317 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 20:41:30,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:41:30,591 INFO L354 Elim1Store]: treesize reduction 5, result has 75.0 percent of original size [2021-11-25 20:41:30,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 32 [2021-11-25 20:41:30,778 INFO L354 Elim1Store]: treesize reduction 5, result has 75.0 percent of original size [2021-11-25 20:41:30,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 32 [2021-11-25 20:41:32,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 72 [2021-11-25 20:41:43,019 INFO L354 Elim1Store]: treesize reduction 132, result has 62.2 percent of original size [2021-11-25 20:41:43,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 10 new quantified variables, introduced 36 case distinctions, treesize of input 63483 treesize of output 61367 [2021-11-25 20:41:46,468 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-25 20:41:46,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302515914] [2021-11-25 20:41:46,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:41:46,469 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:41:46,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:41:46,470 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:41:46,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-25 20:41:46,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:41:46,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-25 20:41:46,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:41:46,677 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 20:41:46,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2021-11-25 20:41:46,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-25 20:41:46,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 20:41:47,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-25 20:41:47,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:41:47,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2021-11-25 20:41:47,556 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-11-25 20:41:47,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 30 [2021-11-25 20:41:47,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:41:47,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-11-25 20:41:48,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-11-25 20:41:49,014 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-25 20:41:49,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 14 [2021-11-25 20:41:49,042 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 20:41:49,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:41:49,228 INFO L354 Elim1Store]: treesize reduction 5, result has 75.0 percent of original size [2021-11-25 20:41:49,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2021-11-25 20:41:50,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 72 [2021-11-25 20:41:58,932 INFO L354 Elim1Store]: treesize reduction 132, result has 62.2 percent of original size [2021-11-25 20:41:58,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 10 new quantified variables, introduced 36 case distinctions, treesize of input 63483 treesize of output 61367 [2021-11-25 20:42:02,369 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-25 20:42:02,370 INFO L186 FreeRefinementEngine]: Found 0 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:42:02,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-11-25 20:42:02,370 ERROR L172 FreeRefinementEngine]: Strategy WALRUS failed to provide any proof altough trace is infeasible [2021-11-25 20:42:02,370 INFO L628 BasicCegarLoop]: Counterexample might be feasible [2021-11-25 20:42:02,377 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location val_from_nodeErr0REQUIRES_VIOLATION (55 of 56 remaining) [2021-11-25 20:42:02,379 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location val_from_nodeErr1REQUIRES_VIOLATION (54 of 56 remaining) [2021-11-25 20:42:02,379 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location list_emptyErr0REQUIRES_VIOLATION (53 of 56 remaining) [2021-11-25 20:42:02,379 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location list_emptyErr1REQUIRES_VIOLATION (52 of 56 remaining) [2021-11-25 20:42:02,380 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location __list_delErr0REQUIRES_VIOLATION (51 of 56 remaining) [2021-11-25 20:42:02,380 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location __list_delErr1REQUIRES_VIOLATION (50 of 56 remaining) [2021-11-25 20:42:02,380 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location __list_delErr2REQUIRES_VIOLATION (49 of 56 remaining) [2021-11-25 20:42:02,380 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location __list_delErr3REQUIRES_VIOLATION (48 of 56 remaining) [2021-11-25 20:42:02,380 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location list_addErr0REQUIRES_VIOLATION (47 of 56 remaining) [2021-11-25 20:42:02,381 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location list_addErr1REQUIRES_VIOLATION (46 of 56 remaining) [2021-11-25 20:42:02,381 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location list_addErr2REQUIRES_VIOLATION (45 of 56 remaining) [2021-11-25 20:42:02,381 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location list_addErr3REQUIRES_VIOLATION (44 of 56 remaining) [2021-11-25 20:42:02,381 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location list_addErr4REQUIRES_VIOLATION (43 of 56 remaining) [2021-11-25 20:42:02,381 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location list_addErr5REQUIRES_VIOLATION (42 of 56 remaining) [2021-11-25 20:42:02,382 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location list_addErr6REQUIRES_VIOLATION (41 of 56 remaining) [2021-11-25 20:42:02,382 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location list_addErr7REQUIRES_VIOLATION (40 of 56 remaining) [2021-11-25 20:42:02,382 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location list_addErr8REQUIRES_VIOLATION (39 of 56 remaining) [2021-11-25 20:42:02,382 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location list_addErr9REQUIRES_VIOLATION (38 of 56 remaining) [2021-11-25 20:42:02,383 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATION (37 of 56 remaining) [2021-11-25 20:42:02,383 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATION (36 of 56 remaining) [2021-11-25 20:42:02,383 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATION (35 of 56 remaining) [2021-11-25 20:42:02,383 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATION (34 of 56 remaining) [2021-11-25 20:42:02,383 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATION (33 of 56 remaining) [2021-11-25 20:42:02,384 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATION (32 of 56 remaining) [2021-11-25 20:42:02,384 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATION (31 of 56 remaining) [2021-11-25 20:42:02,384 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATION (30 of 56 remaining) [2021-11-25 20:42:02,384 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATION (29 of 56 remaining) [2021-11-25 20:42:02,384 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATION (28 of 56 remaining) [2021-11-25 20:42:02,385 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATION (27 of 56 remaining) [2021-11-25 20:42:02,385 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATION (26 of 56 remaining) [2021-11-25 20:42:02,385 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12REQUIRES_VIOLATION (25 of 56 remaining) [2021-11-25 20:42:02,385 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATION (24 of 56 remaining) [2021-11-25 20:42:02,385 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATION (23 of 56 remaining) [2021-11-25 20:42:02,386 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15REQUIRES_VIOLATION (22 of 56 remaining) [2021-11-25 20:42:02,386 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16REQUIRES_VIOLATION (21 of 56 remaining) [2021-11-25 20:42:02,386 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr17REQUIRES_VIOLATION (20 of 56 remaining) [2021-11-25 20:42:02,386 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr18REQUIRES_VIOLATION (19 of 56 remaining) [2021-11-25 20:42:02,386 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr19REQUIRES_VIOLATION (18 of 56 remaining) [2021-11-25 20:42:02,387 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr20REQUIRES_VIOLATION (17 of 56 remaining) [2021-11-25 20:42:02,387 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr21REQUIRES_VIOLATION (16 of 56 remaining) [2021-11-25 20:42:02,387 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr22REQUIRES_VIOLATION (15 of 56 remaining) [2021-11-25 20:42:02,387 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr23REQUIRES_VIOLATION (14 of 56 remaining) [2021-11-25 20:42:02,387 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr24REQUIRES_VIOLATION (13 of 56 remaining) [2021-11-25 20:42:02,388 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr25REQUIRES_VIOLATION (12 of 56 remaining) [2021-11-25 20:42:02,388 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr26REQUIRES_VIOLATION (11 of 56 remaining) [2021-11-25 20:42:02,388 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr27REQUIRES_VIOLATION (10 of 56 remaining) [2021-11-25 20:42:02,388 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr28REQUIRES_VIOLATION (9 of 56 remaining) [2021-11-25 20:42:02,388 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr29REQUIRES_VIOLATION (8 of 56 remaining) [2021-11-25 20:42:02,389 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr30REQUIRES_VIOLATION (7 of 56 remaining) [2021-11-25 20:42:02,389 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr31REQUIRES_VIOLATION (6 of 56 remaining) [2021-11-25 20:42:02,389 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr32REQUIRES_VIOLATION (5 of 56 remaining) [2021-11-25 20:42:02,389 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr33REQUIRES_VIOLATION (4 of 56 remaining) [2021-11-25 20:42:02,390 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE (3 of 56 remaining) [2021-11-25 20:42:02,390 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE (2 of 56 remaining) [2021-11-25 20:42:02,390 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_FREE (1 of 56 remaining) [2021-11-25 20:42:02,390 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_LEAK (0 of 56 remaining) [2021-11-25 20:42:02,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-25 20:42:02,630 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-25 20:42:02,809 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2021-11-25 20:42:03,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt [2021-11-25 20:42:03,009 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:42:03,012 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-25 20:42:03,032 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 08:42:03 BoogieIcfgContainer [2021-11-25 20:42:03,032 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-25 20:42:03,033 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-25 20:42:03,033 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-25 20:42:03,034 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-25 20:42:03,034 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:39:53" (3/4) ... [2021-11-25 20:42:03,037 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-25 20:42:03,038 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-25 20:42:03,038 INFO L158 Benchmark]: Toolchain (without parser) took 131674.57ms. Allocated memory was 60.8MB in the beginning and 333.4MB in the end (delta: 272.6MB). Free memory was 39.3MB in the beginning and 241.1MB in the end (delta: -201.8MB). Peak memory consumption was 73.5MB. Max. memory is 16.1GB. [2021-11-25 20:42:03,039 INFO L158 Benchmark]: CDTParser took 0.37ms. Allocated memory is still 60.8MB. Free memory is still 42.3MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 20:42:03,039 INFO L158 Benchmark]: CACSL2BoogieTranslator took 817.92ms. Allocated memory is still 60.8MB. Free memory was 39.1MB in the beginning and 35.8MB in the end (delta: 3.2MB). Peak memory consumption was 20.2MB. Max. memory is 16.1GB. [2021-11-25 20:42:03,040 INFO L158 Benchmark]: Boogie Procedure Inliner took 100.16ms. Allocated memory is still 60.8MB. Free memory was 35.6MB in the beginning and 33.3MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-25 20:42:03,043 INFO L158 Benchmark]: Boogie Preprocessor took 85.86ms. Allocated memory is still 60.8MB. Free memory was 33.3MB in the beginning and 31.0MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-25 20:42:03,044 INFO L158 Benchmark]: RCFGBuilder took 1023.83ms. Allocated memory was 60.8MB in the beginning and 83.9MB in the end (delta: 23.1MB). Free memory was 31.0MB in the beginning and 47.0MB in the end (delta: -16.1MB). Peak memory consumption was 8.6MB. Max. memory is 16.1GB. [2021-11-25 20:42:03,045 INFO L158 Benchmark]: TraceAbstraction took 129634.19ms. Allocated memory was 83.9MB in the beginning and 333.4MB in the end (delta: 249.6MB). Free memory was 46.4MB in the beginning and 242.1MB in the end (delta: -195.7MB). Peak memory consumption was 187.4MB. Max. memory is 16.1GB. [2021-11-25 20:42:03,045 INFO L158 Benchmark]: Witness Printer took 4.48ms. Allocated memory is still 333.4MB. Free memory was 242.1MB in the beginning and 241.1MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 20:42:03,054 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37ms. Allocated memory is still 60.8MB. Free memory is still 42.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 817.92ms. Allocated memory is still 60.8MB. Free memory was 39.1MB in the beginning and 35.8MB in the end (delta: 3.2MB). Peak memory consumption was 20.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 100.16ms. Allocated memory is still 60.8MB. Free memory was 35.6MB in the beginning and 33.3MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 85.86ms. Allocated memory is still 60.8MB. Free memory was 33.3MB in the beginning and 31.0MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 1023.83ms. Allocated memory was 60.8MB in the beginning and 83.9MB in the end (delta: 23.1MB). Free memory was 31.0MB in the beginning and 47.0MB in the end (delta: -16.1MB). Peak memory consumption was 8.6MB. Max. memory is 16.1GB. * TraceAbstraction took 129634.19ms. Allocated memory was 83.9MB in the beginning and 333.4MB in the end (delta: 249.6MB). Free memory was 46.4MB in the beginning and 242.1MB in the end (delta: -195.7MB). Peak memory consumption was 187.4MB. Max. memory is 16.1GB. * Witness Printer took 4.48ms. Allocated memory is still 333.4MB. Free memory was 242.1MB in the beginning and 241.1MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 590]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L564] struct list_head gl_list = { &(gl_list), &(gl_list) }; [L625] CALL gl_read() [L576] CALL gl_insert(__VERIFIER_nondet_int()) [L567] struct node *node = malloc(sizeof *node); [L568] COND FALSE !(!node) [L570] node->value = value [L571] CALL list_add(&node->linkage, &gl_list) [L547] EXPR head->next [L547] CALL __list_add(new, head, head->next) [L535] next->prev = new [L536] new->next = next [L537] new->prev = prev [L538] prev->next = new [L547] RET __list_add(new, head, head->next) [L571] RET list_add(&node->linkage, &gl_list) [L576] RET gl_insert(__VERIFIER_nondet_int()) [L578] COND FALSE !(__VERIFIER_nondet_int()) [L625] RET gl_read() [L626] CALL gl_sort() [L613] CALL list_empty(&gl_list) [L529] EXPR head->next [L529] return head->next == head; [L613] RET list_empty(&gl_list) [L613] COND FALSE !(list_empty(&gl_list)) [L615] struct list_head dst = { &(dst), &(dst) }; [L616] struct list_head *max_pos; [L617] CALL gl_seek_max() [L594] struct list_head *pos, *max_pos = ((void *)0); [L595] int max; [L596] CALL list_empty(&gl_list) [L529] EXPR head->next [L529] return head->next == head; [L596] RET list_empty(&gl_list) [L596] COND FALSE !(list_empty(&gl_list)) [L599] EXPR gl_list.next [L599] max_pos = gl_list.next [L600] CALL, EXPR val_from_node(max_pos) [L589] struct node *entry = ((struct node *)((char *)(head)-(unsigned long)(&((struct node *)0)->linkage))); [L590] EXPR entry->value [L590] return entry->value; [L600] RET, EXPR val_from_node(max_pos) [L600] max = val_from_node(max_pos) [L602] EXPR (max_pos)->next [L602] pos = (max_pos)->next [L602] COND TRUE pos != (max_pos) [L603] CALL val_from_node(pos) [L589] struct node *entry = ((struct node *)((char *)(head)-(unsigned long)(&((struct node *)0)->linkage))); [L590] entry->value - UnprovableResult [Line: 590]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 529]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 529]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 542]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 542]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 543]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 543]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 535]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 535]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 536]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 536]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 537]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 537]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 538]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 538]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 570]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 570]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 599]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 599]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 557]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 557]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 557]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 557]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 619]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 619]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 619]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 619]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 620]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 620]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 620]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 620]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 621]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 621]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 621]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 621]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 621]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 621]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 621]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 621]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 583]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 583]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 584]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 584]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 584]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 584]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 585]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 585]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 585]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 623]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 141 locations, 56 error locations. Started 1 CEGAR loops. OverallTime: 129.5s, OverallIterations: 21, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 17.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2522 SdHoareTripleChecker+Valid, 11.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2478 mSDsluCounter, 9704 SdHoareTripleChecker+Invalid, 9.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 1545 IncrementalHoareTripleChecker+Unchecked, 7592 mSDsCounter, 195 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5211 IncrementalHoareTripleChecker+Invalid, 6951 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 195 mSolverCounterUnsat, 2112 mSDtfsCounter, 5211 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 891 GetRequests, 571 SyntacticMatches, 23 SemanticMatches, 297 ConstructedPredicates, 9 IntricatePredicates, 0 DeprecatedPredicates, 2209 ImplicationChecksByTransitivity, 40.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=169occurred in iteration=19, InterpolantAutomatonStates: 183, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 20 MinimizatonAttempts, 486 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 3.3s SatisfiabilityAnalysisTime, 63.9s InterpolantComputationTime, 704 NumberOfCodeBlocks, 704 NumberOfCodeBlocksAsserted, 29 NumberOfCheckSat, 675 ConstructedInterpolants, 168 QuantifiedInterpolants, 13850 SizeOfPredicates, 421 NumberOfNonLiveVariables, 4527 ConjunctsInSsa, 721 ConjunctsInUnsatCore, 29 InterpolantComputations, 16 PerfectInterpolantSequences, 27/95 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-11-25 20:42:03,104 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306b2d8a-f1a2-4c78-b9a4-827b38255cff/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN