./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/insertionsort-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/insertionsort-alloca-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P --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 56160afe0156ee9cb1db810e306de9e54e614e31d545b68546457414a273604d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:56:32,365 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:56:32,368 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:56:32,417 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:56:32,418 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:56:32,420 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:56:32,422 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:56:32,426 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:56:32,429 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:56:32,431 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:56:32,432 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:56:32,434 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:56:32,435 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:56:32,437 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:56:32,439 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:56:32,442 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:56:32,443 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:56:32,444 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:56:32,447 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:56:32,451 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:56:32,453 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:56:32,455 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:56:32,457 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:56:32,459 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:56:32,464 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:56:32,464 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:56:32,465 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:56:32,467 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:56:32,467 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:56:32,469 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:56:32,470 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:56:32,471 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:56:32,472 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:56:32,473 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:56:32,475 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:56:32,476 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:56:32,477 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:56:32,477 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:56:32,478 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:56:32,480 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:56:32,481 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:56:32,482 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-21 01:56:32,517 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:56:32,518 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:56:32,518 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:56:32,519 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:56:32,520 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:56:32,520 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:56:32,521 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:56:32,521 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:56:32,522 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:56:32,522 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 01:56:32,523 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:56:32,523 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:56:32,524 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 01:56:32,524 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 01:56:32,525 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:56:32,525 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 01:56:32,525 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 01:56:32,526 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 01:56:32,526 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-21 01:56:32,526 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-21 01:56:32,527 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:56:32,527 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 01:56:32,527 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-21 01:56:32,527 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:56:32,528 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 01:56:32,528 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:56:32,528 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-21 01:56:32,529 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-21 01:56:32,529 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-21 01:56:32,529 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:56:32,529 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-21 01:56:32,530 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 01:56:32,530 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:56:32,530 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:56:32,531 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:56:32,531 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:56:32,531 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:56:32,532 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:56:32,532 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 01:56:32,532 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 01:56:32,533 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:56:32,533 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:56:32,533 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_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 56160afe0156ee9cb1db810e306de9e54e614e31d545b68546457414a273604d [2021-11-21 01:56:32,834 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:56:32,869 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:56:32,873 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:56:32,875 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:56:32,875 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:56:32,877 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/array-memsafety/insertionsort-alloca-1.i [2021-11-21 01:56:32,975 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/data/5147dc8a0/2e7b8598a5194c009bc5f195eee9ae7b/FLAG254a7a1ff [2021-11-21 01:56:33,619 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:56:33,620 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/sv-benchmarks/c/array-memsafety/insertionsort-alloca-1.i [2021-11-21 01:56:33,635 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/data/5147dc8a0/2e7b8598a5194c009bc5f195eee9ae7b/FLAG254a7a1ff [2021-11-21 01:56:33,927 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/data/5147dc8a0/2e7b8598a5194c009bc5f195eee9ae7b [2021-11-21 01:56:33,934 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:56:33,935 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:56:33,943 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:56:33,943 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:56:33,947 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:56:33,948 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:56:33" (1/1) ... [2021-11-21 01:56:33,951 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@252a7439 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:56:33, skipping insertion in model container [2021-11-21 01:56:33,954 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:56:33" (1/1) ... [2021-11-21 01:56:33,964 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:56:34,028 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:56:34,436 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:56:34,448 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) [2021-11-21 01:56:34,448 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@529a7cf7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:56:34, skipping insertion in model container [2021-11-21 01:56:34,449 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:56:34,450 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-21 01:56:34,452 INFO L158 Benchmark]: Toolchain (without parser) took 515.57ms. Allocated memory is still 104.9MB. Free memory was 70.6MB in the beginning and 77.3MB in the end (delta: -6.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-21 01:56:34,453 INFO L158 Benchmark]: CDTParser took 0.36ms. Allocated memory is still 104.9MB. Free memory is still 59.5MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 01:56:34,454 INFO L158 Benchmark]: CACSL2BoogieTranslator took 506.91ms. Allocated memory is still 104.9MB. Free memory was 70.4MB in the beginning and 77.3MB in the end (delta: -6.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-21 01:56:34,457 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36ms. Allocated memory is still 104.9MB. Free memory is still 59.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 506.91ms. Allocated memory is still 104.9MB. Free memory was 70.4MB in the beginning and 77.3MB in the end (delta: -6.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 528]: 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_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/insertionsort-alloca-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P --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 56160afe0156ee9cb1db810e306de9e54e614e31d545b68546457414a273604d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:56:37,246 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:56:37,250 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:56:37,290 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:56:37,291 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:56:37,293 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:56:37,295 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:56:37,298 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:56:37,301 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:56:37,302 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:56:37,304 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:56:37,306 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:56:37,306 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:56:37,308 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:56:37,310 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:56:37,313 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:56:37,314 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:56:37,316 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:56:37,336 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:56:37,340 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:56:37,351 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:56:37,358 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:56:37,360 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:56:37,363 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:56:37,369 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:56:37,371 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:56:37,372 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:56:37,376 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:56:37,378 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:56:37,379 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:56:37,380 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:56:37,381 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:56:37,383 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:56:37,384 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:56:37,386 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:56:37,387 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:56:37,388 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:56:37,388 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:56:37,389 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:56:37,391 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:56:37,392 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:56:37,393 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-21 01:56:37,446 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:56:37,447 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:56:37,447 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:56:37,448 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:56:37,449 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:56:37,449 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:56:37,449 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:56:37,449 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:56:37,450 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:56:37,450 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:56:37,451 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:56:37,451 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:56:37,453 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-21 01:56:37,453 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-21 01:56:37,453 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:56:37,454 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 01:56:37,454 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-21 01:56:37,454 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:56:37,454 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 01:56:37,455 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:56:37,455 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-21 01:56:37,455 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-21 01:56:37,455 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-21 01:56:37,456 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:56:37,456 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-21 01:56:37,456 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-21 01:56:37,456 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-21 01:56:37,457 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 01:56:37,457 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:56:37,457 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:56:37,457 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-21 01:56:37,458 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:56:37,458 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:56:37,458 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:56:37,459 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:56:37,459 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-21 01:56:37,459 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-21 01:56:37,460 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:56:37,460 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:56:37,460 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_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 56160afe0156ee9cb1db810e306de9e54e614e31d545b68546457414a273604d [2021-11-21 01:56:37,897 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:56:37,922 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:56:37,926 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:56:37,927 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:56:37,928 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:56:37,930 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/array-memsafety/insertionsort-alloca-1.i [2021-11-21 01:56:38,003 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/data/ccb08fe79/7fdac20c03a94b28a0be7068feb1ec05/FLAG49265d157 [2021-11-21 01:56:38,758 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:56:38,760 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/sv-benchmarks/c/array-memsafety/insertionsort-alloca-1.i [2021-11-21 01:56:38,786 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/data/ccb08fe79/7fdac20c03a94b28a0be7068feb1ec05/FLAG49265d157 [2021-11-21 01:56:38,991 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/data/ccb08fe79/7fdac20c03a94b28a0be7068feb1ec05 [2021-11-21 01:56:38,994 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:56:38,996 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:56:38,998 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:56:38,999 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:56:39,011 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:56:39,013 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:56:38" (1/1) ... [2021-11-21 01:56:39,017 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19100b41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:56:39, skipping insertion in model container [2021-11-21 01:56:39,018 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:56:38" (1/1) ... [2021-11-21 01:56:39,030 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:56:39,093 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:56:39,528 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:56:39,550 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-21 01:56:39,582 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:56:39,643 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:56:39,659 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:56:39,720 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:56:39,762 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:56:39,763 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:56:39 WrapperNode [2021-11-21 01:56:39,763 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:56:39,765 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:56:39,765 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:56:39,765 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:56:39,775 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:56:39" (1/1) ... [2021-11-21 01:56:39,804 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:56:39" (1/1) ... [2021-11-21 01:56:39,836 INFO L137 Inliner]: procedures = 117, calls = 12, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 65 [2021-11-21 01:56:39,837 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:56:39,837 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:56:39,838 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:56:39,838 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:56:39,849 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:56:39" (1/1) ... [2021-11-21 01:56:39,849 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:56:39" (1/1) ... [2021-11-21 01:56:39,854 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:56:39" (1/1) ... [2021-11-21 01:56:39,855 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:56:39" (1/1) ... [2021-11-21 01:56:39,865 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:56:39" (1/1) ... [2021-11-21 01:56:39,882 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:56:39" (1/1) ... [2021-11-21 01:56:39,885 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:56:39" (1/1) ... [2021-11-21 01:56:39,889 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:56:39,890 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:56:39,890 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:56:39,890 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:56:39,891 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:56:39" (1/1) ... [2021-11-21 01:56:39,900 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:56:39,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:56:39,926 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:56:39,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:56:39,977 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-21 01:56:39,978 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 01:56:39,980 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 01:56:39,981 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-21 01:56:39,981 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:56:39,981 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:56:40,106 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:56:40,108 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:56:40,572 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:56:40,578 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:56:40,579 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-21 01:56:40,581 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:56:40 BoogieIcfgContainer [2021-11-21 01:56:40,581 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:56:40,583 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:56:40,583 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:56:40,587 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:56:40,590 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:56:38" (1/3) ... [2021-11-21 01:56:40,591 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e18193c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:56:40, skipping insertion in model container [2021-11-21 01:56:40,591 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:56:39" (2/3) ... [2021-11-21 01:56:40,592 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e18193c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:56:40, skipping insertion in model container [2021-11-21 01:56:40,592 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:56:40" (3/3) ... [2021-11-21 01:56:40,600 INFO L111 eAbstractionObserver]: Analyzing ICFG insertionsort-alloca-1.i [2021-11-21 01:56:40,609 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:56:40,610 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2021-11-21 01:56:40,686 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:56:40,707 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 [2021-11-21 01:56:40,709 INFO L340 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2021-11-21 01:56:40,731 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 39 states have internal predecessors, (47), 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) [2021-11-21 01:56:40,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-21 01:56:40,742 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:56:40,743 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-21 01:56:40,744 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-21 01:56:40,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:56:40,752 INFO L85 PathProgramCache]: Analyzing trace with hash 889508873, now seen corresponding path program 1 times [2021-11-21 01:56:40,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:56:40,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1499674371] [2021-11-21 01:56:40,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:56:40,768 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:56:40,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:56:40,775 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:56:40,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-21 01:56:40,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:56:40,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 01:56:40,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:56:40,999 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 [2021-11-21 01:56:41,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:56:41,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:56:41,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:56:41,065 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:56:41,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1499674371] [2021-11-21 01:56:41,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1499674371] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:56:41,068 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:56:41,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-21 01:56:41,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738177497] [2021-11-21 01:56:41,072 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:56:41,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:56:41,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:56:41,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:56:41,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:56:41,155 INFO L87 Difference]: Start difference. First operand has 40 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 39 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2021-11-21 01:56:41,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:56:41,304 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2021-11-21 01:56:41,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:56:41,307 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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 6 [2021-11-21 01:56:41,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:56:41,317 INFO L225 Difference]: With dead ends: 39 [2021-11-21 01:56:41,317 INFO L226 Difference]: Without dead ends: 37 [2021-11-21 01:56:41,320 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:56:41,324 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 33 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:56:41,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 32 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:56:41,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-21 01:56:41,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-11-21 01:56:41,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 25 states have (on average 1.64) internal successors, (41), 36 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:56:41,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2021-11-21 01:56:41,367 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 6 [2021-11-21 01:56:41,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:56:41,368 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2021-11-21 01:56:41,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2021-11-21 01:56:41,369 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2021-11-21 01:56:41,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-21 01:56:41,369 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:56:41,370 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-21 01:56:41,395 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-21 01:56:41,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:56:41,587 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-21 01:56:41,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:56:41,588 INFO L85 PathProgramCache]: Analyzing trace with hash 889508874, now seen corresponding path program 1 times [2021-11-21 01:56:41,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:56:41,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1653906234] [2021-11-21 01:56:41,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:56:41,590 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:56:41,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:56:41,591 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:56:41,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-21 01:56:41,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:56:41,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-21 01:56:41,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:56:41,730 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 [2021-11-21 01:56:41,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:56:41,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:56:42,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:56:42,066 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:56:42,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1653906234] [2021-11-21 01:56:42,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1653906234] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:56:42,066 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:56:42,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-21 01:56:42,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281149726] [2021-11-21 01:56:42,067 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:56:42,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:56:42,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:56:42,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:56:42,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:56:42,070 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 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) [2021-11-21 01:56:43,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:56:43,023 INFO L93 Difference]: Finished difference Result 105 states and 115 transitions. [2021-11-21 01:56:43,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 01:56:43,040 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 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 6 [2021-11-21 01:56:43,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:56:43,043 INFO L225 Difference]: With dead ends: 105 [2021-11-21 01:56:43,043 INFO L226 Difference]: Without dead ends: 105 [2021-11-21 01:56:43,043 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-11-21 01:56:43,045 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 183 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-21 01:56:43,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 119 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-21 01:56:43,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-11-21 01:56:43,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 41. [2021-11-21 01:56:43,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 40 states have internal predecessors, (46), 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) [2021-11-21 01:56:43,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2021-11-21 01:56:43,056 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 6 [2021-11-21 01:56:43,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:56:43,057 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2021-11-21 01:56:43,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 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) [2021-11-21 01:56:43,057 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2021-11-21 01:56:43,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-21 01:56:43,058 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:56:43,058 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:56:43,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-21 01:56:43,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:56:43,267 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-21 01:56:43,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:56:43,268 INFO L85 PathProgramCache]: Analyzing trace with hash 176742579, now seen corresponding path program 1 times [2021-11-21 01:56:43,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:56:43,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1696981823] [2021-11-21 01:56:43,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:56:43,270 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:56:43,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:56:43,272 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:56:43,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-21 01:56:43,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:56:43,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 01:56:43,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:56:43,366 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 [2021-11-21 01:56:43,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:56:43,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:56:43,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:56:43,468 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:56:43,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1696981823] [2021-11-21 01:56:43,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1696981823] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:56:43,469 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:56:43,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-21 01:56:43,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407032544] [2021-11-21 01:56:43,470 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:56:43,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:56:43,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:56:43,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:56:43,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:56:43,472 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 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) [2021-11-21 01:56:43,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:56:43,660 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2021-11-21 01:56:43,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:56:43,661 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 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 8 [2021-11-21 01:56:43,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:56:43,661 INFO L225 Difference]: With dead ends: 36 [2021-11-21 01:56:43,662 INFO L226 Difference]: Without dead ends: 36 [2021-11-21 01:56:43,662 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:56:43,664 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 49 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:56:43,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 30 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:56:43,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-21 01:56:43,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-11-21 01:56:43,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 35 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:56:43,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2021-11-21 01:56:43,670 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 8 [2021-11-21 01:56:43,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:56:43,671 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2021-11-21 01:56:43,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 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) [2021-11-21 01:56:43,671 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2021-11-21 01:56:43,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-21 01:56:43,672 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:56:43,672 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:56:43,685 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-21 01:56:43,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:56:43,886 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-21 01:56:43,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:56:43,887 INFO L85 PathProgramCache]: Analyzing trace with hash 176742580, now seen corresponding path program 1 times [2021-11-21 01:56:43,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:56:43,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [670738918] [2021-11-21 01:56:43,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:56:43,888 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:56:43,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:56:43,891 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:56:43,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-21 01:56:43,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:56:43,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-21 01:56:43,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:56:43,998 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 8 treesize of output 7 [2021-11-21 01:56:44,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:56:44,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:56:44,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:56:44,596 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:56:44,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [670738918] [2021-11-21 01:56:44,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [670738918] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:56:44,597 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:56:44,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 5] imperfect sequences [] total 8 [2021-11-21 01:56:44,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865476531] [2021-11-21 01:56:44,598 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:56:44,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 01:56:44,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:56:44,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 01:56:44,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:56:44,600 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 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) [2021-11-21 01:56:45,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:56:45,371 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2021-11-21 01:56:45,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:56:45,374 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 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 8 [2021-11-21 01:56:45,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:56:45,374 INFO L225 Difference]: With dead ends: 38 [2021-11-21 01:56:45,375 INFO L226 Difference]: Without dead ends: 38 [2021-11-21 01:56:45,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-11-21 01:56:45,377 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 86 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:56:45,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 69 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-21 01:56:45,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-21 01:56:45,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2021-11-21 01:56:45,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 33 states have internal predecessors, (38), 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) [2021-11-21 01:56:45,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2021-11-21 01:56:45,386 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 8 [2021-11-21 01:56:45,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:56:45,387 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2021-11-21 01:56:45,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 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) [2021-11-21 01:56:45,388 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2021-11-21 01:56:45,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-21 01:56:45,388 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:56:45,389 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:56:45,403 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-21 01:56:45,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:56:45,603 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-21 01:56:45,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:56:45,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1091210163, now seen corresponding path program 1 times [2021-11-21 01:56:45,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:56:45,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [81419673] [2021-11-21 01:56:45,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:56:45,606 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:56:45,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:56:45,609 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:56:45,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-21 01:56:45,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:56:45,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 01:56:45,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:56:45,779 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:56:45,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:56:45,869 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:56:45,869 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:56:45,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [81419673] [2021-11-21 01:56:45,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [81419673] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:56:45,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1497811707] [2021-11-21 01:56:45,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:56:45,870 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:56:45,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:56:45,877 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:56:45,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-21 01:56:45,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:56:45,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 01:56:45,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:56:46,060 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:56:46,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:56:46,101 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:56:46,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1497811707] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:56:46,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980093272] [2021-11-21 01:56:46,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:56:46,102 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:56:46,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:56:46,107 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:56:46,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-21 01:56:46,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:56:46,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 01:56:46,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:56:46,227 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:56:46,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:56:46,272 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:56:46,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980093272] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:56:46,273 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:56:46,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2021-11-21 01:56:46,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049363517] [2021-11-21 01:56:46,273 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:56:46,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 01:56:46,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:56:46,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 01:56:46,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:56:46,275 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 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) [2021-11-21 01:56:46,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:56:46,398 INFO L93 Difference]: Finished difference Result 63 states and 69 transitions. [2021-11-21 01:56:46,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:56:46,400 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 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 10 [2021-11-21 01:56:46,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:56:46,402 INFO L225 Difference]: With dead ends: 63 [2021-11-21 01:56:46,402 INFO L226 Difference]: Without dead ends: 63 [2021-11-21 01:56:46,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:56:46,404 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 55 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:56:46,404 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 168 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:56:46,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-11-21 01:56:46,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 40. [2021-11-21 01:56:46,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 39 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:56:46,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2021-11-21 01:56:46,412 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 10 [2021-11-21 01:56:46,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:56:46,413 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2021-11-21 01:56:46,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 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) [2021-11-21 01:56:46,413 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2021-11-21 01:56:46,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-21 01:56:46,414 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:56:46,414 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:56:46,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-21 01:56:46,654 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-21 01:56:46,830 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-11-21 01:56:47,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt [2021-11-21 01:56:47,028 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-21 01:56:47,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:56:47,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1900556789, now seen corresponding path program 1 times [2021-11-21 01:56:47,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:56:47,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [484591008] [2021-11-21 01:56:47,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:56:47,030 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:56:47,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:56:47,031 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:56:47,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-21 01:56:47,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:56:47,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-21 01:56:47,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:56:47,134 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 8 treesize of output 7 [2021-11-21 01:56:47,427 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:56:47,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:56:48,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:56:48,215 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:56:48,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [484591008] [2021-11-21 01:56:48,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [484591008] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:56:48,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1783321443] [2021-11-21 01:56:48,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:56:48,216 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:56:48,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:56:48,218 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:56:48,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-21 01:56:48,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:56:48,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-21 01:56:48,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:56:48,390 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 8 treesize of output 7 [2021-11-21 01:56:48,595 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:56:48,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:56:48,933 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:56:48,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1783321443] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:56:48,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281249959] [2021-11-21 01:56:48,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:56:48,935 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:56:48,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:56:48,935 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:56:48,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-21 01:56:48,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:56:48,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-21 01:56:48,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:56:49,028 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 8 treesize of output 7 [2021-11-21 01:56:49,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:56:49,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:56:49,455 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:56:49,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281249959] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:56:49,456 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:56:49,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 12 [2021-11-21 01:56:49,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956597757] [2021-11-21 01:56:49,456 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:56:49,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-21 01:56:49,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:56:49,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-21 01:56:49,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-11-21 01:56:49,458 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 13 states have internal predecessors, (25), 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) [2021-11-21 01:56:50,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:56:50,424 INFO L93 Difference]: Finished difference Result 71 states and 79 transitions. [2021-11-21 01:56:50,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-21 01:56:50,427 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 13 states have internal predecessors, (25), 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 10 [2021-11-21 01:56:50,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:56:50,428 INFO L225 Difference]: With dead ends: 71 [2021-11-21 01:56:50,428 INFO L226 Difference]: Without dead ends: 71 [2021-11-21 01:56:50,428 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-11-21 01:56:50,429 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 125 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-21 01:56:50,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 107 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 114 Invalid, 0 Unknown, 4 Unchecked, 0.9s Time] [2021-11-21 01:56:50,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-11-21 01:56:50,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 48. [2021-11-21 01:56:50,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 41 states have (on average 1.3170731707317074) internal successors, (54), 47 states have internal predecessors, (54), 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) [2021-11-21 01:56:50,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2021-11-21 01:56:50,437 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 10 [2021-11-21 01:56:50,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:56:50,438 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2021-11-21 01:56:50,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 13 states have internal predecessors, (25), 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) [2021-11-21 01:56:50,439 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2021-11-21 01:56:50,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-21 01:56:50,439 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:56:50,440 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:56:50,460 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-21 01:56:50,680 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-11-21 01:56:50,856 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-21 01:56:51,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt [2021-11-21 01:56:51,055 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-21 01:56:51,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:56:51,055 INFO L85 PathProgramCache]: Analyzing trace with hash -680998151, now seen corresponding path program 1 times [2021-11-21 01:56:51,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:56:51,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1279560019] [2021-11-21 01:56:51,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:56:51,056 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:56:51,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:56:51,057 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:56:51,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-21 01:56:51,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:56:51,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 01:56:51,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:56:51,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:56:51,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:56:51,223 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:56:51,223 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:56:51,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1279560019] [2021-11-21 01:56:51,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1279560019] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:56:51,224 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:56:51,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-21 01:56:51,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80720981] [2021-11-21 01:56:51,224 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:56:51,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:56:51,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:56:51,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:56:51,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:56:51,225 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 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) [2021-11-21 01:56:51,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:56:51,308 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2021-11-21 01:56:51,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:56:51,309 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 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 12 [2021-11-21 01:56:51,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:56:51,309 INFO L225 Difference]: With dead ends: 53 [2021-11-21 01:56:51,309 INFO L226 Difference]: Without dead ends: 53 [2021-11-21 01:56:51,310 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:56:51,311 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 12 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:56:51,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 115 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:56:51,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-21 01:56:51,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 50. [2021-11-21 01:56:51,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 43 states have (on average 1.302325581395349) internal successors, (56), 49 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:56:51,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 56 transitions. [2021-11-21 01:56:51,324 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 56 transitions. Word has length 12 [2021-11-21 01:56:51,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:56:51,328 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 56 transitions. [2021-11-21 01:56:51,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 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) [2021-11-21 01:56:51,328 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 56 transitions. [2021-11-21 01:56:51,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-21 01:56:51,329 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:56:51,330 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:56:51,345 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-21 01:56:51,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:56:51,530 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-21 01:56:51,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:56:51,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1074025161, now seen corresponding path program 1 times [2021-11-21 01:56:51,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:56:51,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1793338939] [2021-11-21 01:56:51,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:56:51,532 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:56:51,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:56:51,533 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:56:51,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-21 01:56:51,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:56:51,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-21 01:56:51,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:56:51,612 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 8 treesize of output 7 [2021-11-21 01:56:51,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:56:51,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:56:52,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:56:52,589 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:56:52,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1793338939] [2021-11-21 01:56:52,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1793338939] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:56:52,589 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:56:52,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-21 01:56:52,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374224435] [2021-11-21 01:56:52,589 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:56:52,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-21 01:56:52,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:56:52,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-21 01:56:52,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-21 01:56:52,591 INFO L87 Difference]: Start difference. First operand 50 states and 56 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 states have internal predecessors, (22), 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) [2021-11-21 01:56:53,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:56:53,213 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2021-11-21 01:56:53,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 01:56:53,214 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 states have internal predecessors, (22), 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 12 [2021-11-21 01:56:53,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:56:53,215 INFO L225 Difference]: With dead ends: 55 [2021-11-21 01:56:53,216 INFO L226 Difference]: Without dead ends: 55 [2021-11-21 01:56:53,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-11-21 01:56:53,217 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 24 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:56:53,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 136 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 77 Invalid, 0 Unknown, 1 Unchecked, 0.4s Time] [2021-11-21 01:56:53,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-11-21 01:56:53,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2021-11-21 01:56:53,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 45 states have (on average 1.3111111111111111) internal successors, (59), 51 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:56:53,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2021-11-21 01:56:53,223 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 12 [2021-11-21 01:56:53,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:56:53,224 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2021-11-21 01:56:53,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 states have internal predecessors, (22), 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) [2021-11-21 01:56:53,225 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2021-11-21 01:56:53,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-21 01:56:53,225 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:56:53,226 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:56:53,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-21 01:56:53,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:56:53,428 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-21 01:56:53,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:56:53,428 INFO L85 PathProgramCache]: Analyzing trace with hash 363893229, now seen corresponding path program 1 times [2021-11-21 01:56:53,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:56:53,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [332023239] [2021-11-21 01:56:53,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:56:53,429 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:56:53,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:56:53,430 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:56:53,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-21 01:56:53,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:56:53,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 01:56:53,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:56:53,600 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:56:53,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:56:59,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:56:59,719 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:56:59,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [332023239] [2021-11-21 01:56:59,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [332023239] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:56:59,720 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:56:59,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-21 01:56:59,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661693382] [2021-11-21 01:56:59,720 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:56:59,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 01:56:59,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:56:59,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 01:56:59,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=24, Unknown=3, NotChecked=0, Total=42 [2021-11-21 01:56:59,721 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 7 states have internal predecessors, (25), 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) [2021-11-21 01:56:59,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:56:59,796 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2021-11-21 01:56:59,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:56:59,797 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 7 states have internal predecessors, (25), 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 13 [2021-11-21 01:56:59,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:56:59,798 INFO L225 Difference]: With dead ends: 51 [2021-11-21 01:56:59,798 INFO L226 Difference]: Without dead ends: 41 [2021-11-21 01:56:59,799 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=15, Invalid=24, Unknown=3, NotChecked=0, Total=42 [2021-11-21 01:56:59,800 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 24 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:56:59,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 79 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 18 Unchecked, 0.1s Time] [2021-11-21 01:56:59,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-11-21 01:56:59,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-11-21 01:56:59,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 40 states have internal predecessors, (46), 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) [2021-11-21 01:56:59,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2021-11-21 01:56:59,806 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 13 [2021-11-21 01:56:59,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:56:59,806 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2021-11-21 01:56:59,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 7 states have internal predecessors, (25), 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) [2021-11-21 01:56:59,807 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2021-11-21 01:56:59,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-21 01:56:59,808 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:56:59,808 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:56:59,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-21 01:57:00,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:57:00,016 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-21 01:57:00,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:57:00,016 INFO L85 PathProgramCache]: Analyzing trace with hash -749048740, now seen corresponding path program 1 times [2021-11-21 01:57:00,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:57:00,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [158200504] [2021-11-21 01:57:00,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:57:00,017 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:57:00,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:57:00,018 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:57:00,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-21 01:57:00,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:57:00,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-21 01:57:00,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:57:00,123 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 13 treesize of output 12 [2021-11-21 01:57:01,228 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:57:01,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:57:02,733 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:57:02,734 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:57:02,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [158200504] [2021-11-21 01:57:02,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [158200504] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:57:02,734 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:57:02,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 10 [2021-11-21 01:57:02,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382060082] [2021-11-21 01:57:02,735 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:57:02,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-21 01:57:02,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:57:02,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-21 01:57:02,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-11-21 01:57:02,736 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand has 11 states, 10 states have (on average 3.0) internal successors, (30), 11 states have internal predecessors, (30), 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) [2021-11-21 01:57:03,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:57:03,189 INFO L93 Difference]: Finished difference Result 48 states and 57 transitions. [2021-11-21 01:57:03,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 01:57:03,190 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.0) internal successors, (30), 11 states have internal predecessors, (30), 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 16 [2021-11-21 01:57:03,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:57:03,191 INFO L225 Difference]: With dead ends: 48 [2021-11-21 01:57:03,191 INFO L226 Difference]: Without dead ends: 48 [2021-11-21 01:57:03,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-11-21 01:57:03,192 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 7 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:57:03,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 92 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 25 Unchecked, 0.3s Time] [2021-11-21 01:57:03,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-11-21 01:57:03,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2021-11-21 01:57:03,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 44 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:57:03,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2021-11-21 01:57:03,198 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 16 [2021-11-21 01:57:03,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:57:03,198 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2021-11-21 01:57:03,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.0) internal successors, (30), 11 states have internal predecessors, (30), 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) [2021-11-21 01:57:03,198 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2021-11-21 01:57:03,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-21 01:57:03,199 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:57:03,199 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:57:03,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-21 01:57:03,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:57:03,400 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-21 01:57:03,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:57:03,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1745668404, now seen corresponding path program 1 times [2021-11-21 01:57:03,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:57:03,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2035123583] [2021-11-21 01:57:03,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:57:03,401 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:57:03,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:57:03,403 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:57:03,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-21 01:57:03,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:57:03,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 01:57:03,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:57:03,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:57:03,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:57:03,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:57:03,638 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:57:03,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2035123583] [2021-11-21 01:57:03,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2035123583] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:57:03,638 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:57:03,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-11-21 01:57:03,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142584395] [2021-11-21 01:57:03,639 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:57:03,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 01:57:03,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:57:03,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 01:57:03,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:57:03,640 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 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) [2021-11-21 01:57:04,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:57:04,105 INFO L93 Difference]: Finished difference Result 113 states and 124 transitions. [2021-11-21 01:57:04,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-21 01:57:04,109 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 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 17 [2021-11-21 01:57:04,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:57:04,110 INFO L225 Difference]: With dead ends: 113 [2021-11-21 01:57:04,110 INFO L226 Difference]: Without dead ends: 113 [2021-11-21 01:57:04,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-11-21 01:57:04,111 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 123 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:57:04,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 92 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 01:57:04,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-11-21 01:57:04,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 61. [2021-11-21 01:57:04,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 55 states have (on average 1.3272727272727274) internal successors, (73), 60 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:57:04,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 73 transitions. [2021-11-21 01:57:04,127 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 73 transitions. Word has length 17 [2021-11-21 01:57:04,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:57:04,131 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 73 transitions. [2021-11-21 01:57:04,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 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) [2021-11-21 01:57:04,131 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 73 transitions. [2021-11-21 01:57:04,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-21 01:57:04,132 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:57:04,132 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1] [2021-11-21 01:57:04,141 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-21 01:57:04,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:57:04,333 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-21 01:57:04,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:57:04,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1817992175, now seen corresponding path program 2 times [2021-11-21 01:57:04,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:57:04,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1334862886] [2021-11-21 01:57:04,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 01:57:04,334 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:57:04,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:57:04,335 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:57:04,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-21 01:57:04,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 01:57:04,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:57:04,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-21 01:57:04,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:57:04,442 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 8 treesize of output 7 [2021-11-21 01:57:04,993 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:57:04,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:57:06,496 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:57:06,496 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:57:06,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1334862886] [2021-11-21 01:57:06,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1334862886] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:57:06,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1455179246] [2021-11-21 01:57:06,497 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 01:57:06,497 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:57:06,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:57:06,503 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:57:06,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-21 01:57:06,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 01:57:06,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:57:06,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-21 01:57:06,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:57:06,688 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 8 treesize of output 7 [2021-11-21 01:57:07,158 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:57:07,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:57:07,889 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:57:07,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1455179246] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:57:07,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941162650] [2021-11-21 01:57:07,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 01:57:07,890 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:57:07,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:57:07,891 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:57:07,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-21 01:57:07,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 01:57:07,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:57:07,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-21 01:57:07,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:57:07,989 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 8 treesize of output 7 [2021-11-21 01:57:08,448 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:57:08,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:57:09,909 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:57:09,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941162650] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:57:09,910 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:57:09,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 8, 8] total 24 [2021-11-21 01:57:09,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928256607] [2021-11-21 01:57:09,910 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:57:09,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-21 01:57:09,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:57:09,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-21 01:57:09,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=425, Unknown=0, NotChecked=0, Total=600 [2021-11-21 01:57:09,913 INFO L87 Difference]: Start difference. First operand 61 states and 73 transitions. Second operand has 25 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:57:14,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:57:14,442 INFO L93 Difference]: Finished difference Result 287 states and 348 transitions. [2021-11-21 01:57:14,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-21 01:57:14,443 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-21 01:57:14,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:57:14,445 INFO L225 Difference]: With dead ends: 287 [2021-11-21 01:57:14,445 INFO L226 Difference]: Without dead ends: 287 [2021-11-21 01:57:14,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=292, Invalid=700, Unknown=0, NotChecked=0, Total=992 [2021-11-21 01:57:14,447 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 502 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 502 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:57:14,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [502 Valid, 376 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 487 Invalid, 0 Unknown, 9 Unchecked, 2.5s Time] [2021-11-21 01:57:14,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-11-21 01:57:14,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 77. [2021-11-21 01:57:14,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 71 states have (on average 1.3098591549295775) internal successors, (93), 76 states have internal predecessors, (93), 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) [2021-11-21 01:57:14,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 93 transitions. [2021-11-21 01:57:14,460 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 93 transitions. Word has length 18 [2021-11-21 01:57:14,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:57:14,460 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 93 transitions. [2021-11-21 01:57:14,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:57:14,461 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 93 transitions. [2021-11-21 01:57:14,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-21 01:57:14,462 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:57:14,462 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:57:14,510 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-21 01:57:14,694 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-11-21 01:57:14,898 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-21 01:57:15,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:57:15,088 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-21 01:57:15,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:57:15,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1739046953, now seen corresponding path program 1 times [2021-11-21 01:57:15,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:57:15,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1615166404] [2021-11-21 01:57:15,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:57:15,089 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:57:15,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:57:15,090 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:57:15,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-21 01:57:15,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:57:15,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-21 01:57:15,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:57:15,173 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 13 treesize of output 12 [2021-11-21 01:57:15,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:57:15,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:57:16,578 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:57:16,578 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:57:16,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1615166404] [2021-11-21 01:57:16,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1615166404] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:57:16,578 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:57:16,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 10 [2021-11-21 01:57:16,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264444728] [2021-11-21 01:57:16,579 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:57:16,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-21 01:57:16,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:57:16,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-21 01:57:16,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-11-21 01:57:16,580 INFO L87 Difference]: Start difference. First operand 77 states and 93 transitions. Second operand has 11 states, 10 states have (on average 3.6) internal successors, (36), 11 states have internal predecessors, (36), 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) [2021-11-21 01:57:17,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:57:17,090 INFO L93 Difference]: Finished difference Result 81 states and 99 transitions. [2021-11-21 01:57:17,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-21 01:57:17,091 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.6) internal successors, (36), 11 states have internal predecessors, (36), 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 19 [2021-11-21 01:57:17,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:57:17,093 INFO L225 Difference]: With dead ends: 81 [2021-11-21 01:57:17,093 INFO L226 Difference]: Without dead ends: 81 [2021-11-21 01:57:17,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-11-21 01:57:17,094 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 4 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:57:17,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 91 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 22 Unchecked, 0.4s Time] [2021-11-21 01:57:17,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-11-21 01:57:17,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2021-11-21 01:57:17,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 74 states have (on average 1.3108108108108107) internal successors, (97), 79 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:57:17,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 97 transitions. [2021-11-21 01:57:17,102 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 97 transitions. Word has length 19 [2021-11-21 01:57:17,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:57:17,103 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 97 transitions. [2021-11-21 01:57:17,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.6) internal successors, (36), 11 states have internal predecessors, (36), 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) [2021-11-21 01:57:17,103 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 97 transitions. [2021-11-21 01:57:17,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-21 01:57:17,104 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:57:17,104 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:57:17,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-21 01:57:17,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:57:17,319 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-21 01:57:17,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:57:17,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1739047003, now seen corresponding path program 1 times [2021-11-21 01:57:17,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:57:17,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1067872446] [2021-11-21 01:57:17,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:57:17,320 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:57:17,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:57:17,320 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:57:17,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-21 01:57:17,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:57:17,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 01:57:17,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:57:17,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:57:17,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:57:17,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2021-11-21 01:57:17,979 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:57:17,979 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:57:17,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1067872446] [2021-11-21 01:57:17,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1067872446] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:57:17,979 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:57:17,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-21 01:57:17,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978995011] [2021-11-21 01:57:17,980 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:57:17,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-21 01:57:17,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:57:17,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-21 01:57:17,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-21 01:57:17,981 INFO L87 Difference]: Start difference. First operand 80 states and 97 transitions. Second operand has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 10 states have internal predecessors, (35), 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) [2021-11-21 01:57:19,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:57:19,594 INFO L93 Difference]: Finished difference Result 134 states and 152 transitions. [2021-11-21 01:57:19,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-21 01:57:19,595 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 10 states have internal predecessors, (35), 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 19 [2021-11-21 01:57:19,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:57:19,597 INFO L225 Difference]: With dead ends: 134 [2021-11-21 01:57:19,597 INFO L226 Difference]: Without dead ends: 134 [2021-11-21 01:57:19,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2021-11-21 01:57:19,598 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 189 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:57:19,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 92 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-21 01:57:19,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-11-21 01:57:19,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 84. [2021-11-21 01:57:19,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 78 states have (on average 1.3205128205128205) internal successors, (103), 83 states have internal predecessors, (103), 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) [2021-11-21 01:57:19,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 103 transitions. [2021-11-21 01:57:19,605 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 103 transitions. Word has length 19 [2021-11-21 01:57:19,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:57:19,605 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 103 transitions. [2021-11-21 01:57:19,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 10 states have internal predecessors, (35), 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) [2021-11-21 01:57:19,606 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 103 transitions. [2021-11-21 01:57:19,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-21 01:57:19,607 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:57:19,607 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] [2021-11-21 01:57:19,618 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-21 01:57:19,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:57:19,816 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-21 01:57:19,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:57:19,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1924117753, now seen corresponding path program 1 times [2021-11-21 01:57:19,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:57:19,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1936645993] [2021-11-21 01:57:19,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:57:19,816 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:57:19,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:57:19,818 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:57:19,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-21 01:57:19,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:57:19,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-21 01:57:19,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:57:19,879 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 13 treesize of output 12 [2021-11-21 01:57:20,465 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:57:20,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:57:21,460 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:57:21,460 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:57:21,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1936645993] [2021-11-21 01:57:21,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1936645993] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:57:21,461 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:57:21,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 10 [2021-11-21 01:57:21,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768131672] [2021-11-21 01:57:21,461 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:57:21,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-21 01:57:21,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:57:21,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-21 01:57:21,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-11-21 01:57:21,463 INFO L87 Difference]: Start difference. First operand 84 states and 103 transitions. Second operand has 11 states, 10 states have (on average 3.8) internal successors, (38), 11 states have internal predecessors, (38), 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) [2021-11-21 01:57:21,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:57:21,759 INFO L93 Difference]: Finished difference Result 86 states and 105 transitions. [2021-11-21 01:57:21,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 01:57:21,760 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.8) internal successors, (38), 11 states have internal predecessors, (38), 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 20 [2021-11-21 01:57:21,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:57:21,761 INFO L225 Difference]: With dead ends: 86 [2021-11-21 01:57:21,761 INFO L226 Difference]: Without dead ends: 86 [2021-11-21 01:57:21,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-11-21 01:57:21,763 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 2 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:57:21,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 84 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 20 Unchecked, 0.2s Time] [2021-11-21 01:57:21,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-11-21 01:57:21,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2021-11-21 01:57:21,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 80 states have (on average 1.3125) internal successors, (105), 85 states have internal predecessors, (105), 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) [2021-11-21 01:57:21,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 105 transitions. [2021-11-21 01:57:21,772 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 105 transitions. Word has length 20 [2021-11-21 01:57:21,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:57:21,773 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 105 transitions. [2021-11-21 01:57:21,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.8) internal successors, (38), 11 states have internal predecessors, (38), 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) [2021-11-21 01:57:21,773 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 105 transitions. [2021-11-21 01:57:21,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-21 01:57:21,775 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:57:21,775 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:57:21,788 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-21 01:57:21,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:57:21,988 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-21 01:57:21,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:57:21,988 INFO L85 PathProgramCache]: Analyzing trace with hash 2052266087, now seen corresponding path program 1 times [2021-11-21 01:57:21,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:57:21,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [830901854] [2021-11-21 01:57:21,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:57:21,989 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:57:21,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:57:21,990 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:57:21,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-21 01:57:22,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:57:22,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-21 01:57:22,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:57:22,080 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 8 treesize of output 7 [2021-11-21 01:57:22,354 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:57:22,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:57:23,737 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:57:23,738 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:57:23,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [830901854] [2021-11-21 01:57:23,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [830901854] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:57:23,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1451484117] [2021-11-21 01:57:23,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:57:23,738 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:57:23,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:57:23,739 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:57:23,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-21 01:57:23,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:57:23,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 01:57:23,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:57:24,185 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:57:24,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:57:24,536 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:57:24,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1451484117] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:57:24,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411015410] [2021-11-21 01:57:24,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:57:24,537 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:57:24,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:57:24,538 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:57:24,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-21 01:57:24,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:57:24,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-21 01:57:24,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:57:24,612 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 8 treesize of output 7 [2021-11-21 01:57:24,796 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:57:24,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:57:25,469 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:57:25,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411015410] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:57:25,470 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:57:25,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7, 6, 7, 8] total 22 [2021-11-21 01:57:25,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434121275] [2021-11-21 01:57:25,471 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:57:25,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-21 01:57:25,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:57:25,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-21 01:57:25,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-11-21 01:57:25,472 INFO L87 Difference]: Start difference. First operand 86 states and 105 transitions. Second operand has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:57:26,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:57:26,493 INFO L93 Difference]: Finished difference Result 88 states and 106 transitions. [2021-11-21 01:57:26,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-21 01:57:26,494 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-21 01:57:26,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:57:26,495 INFO L225 Difference]: With dead ends: 88 [2021-11-21 01:57:26,495 INFO L226 Difference]: Without dead ends: 86 [2021-11-21 01:57:26,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2021-11-21 01:57:26,497 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 62 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-21 01:57:26,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 150 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 189 Invalid, 0 Unknown, 45 Unchecked, 0.8s Time] [2021-11-21 01:57:26,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-11-21 01:57:26,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2021-11-21 01:57:26,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 80 states have (on average 1.3) internal successors, (104), 85 states have internal predecessors, (104), 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) [2021-11-21 01:57:26,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 104 transitions. [2021-11-21 01:57:26,500 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 104 transitions. Word has length 22 [2021-11-21 01:57:26,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:57:26,501 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 104 transitions. [2021-11-21 01:57:26,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:57:26,501 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 104 transitions. [2021-11-21 01:57:26,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-21 01:57:26,503 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:57:26,503 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] [2021-11-21 01:57:26,534 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-21 01:57:26,724 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-21 01:57:26,918 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2021-11-21 01:57:27,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt [2021-11-21 01:57:27,116 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-21 01:57:27,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:57:27,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1808251990, now seen corresponding path program 2 times [2021-11-21 01:57:27,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:57:27,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1041051387] [2021-11-21 01:57:27,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 01:57:27,120 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:57:27,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:57:27,121 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:57:27,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-21 01:57:27,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 01:57:27,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:57:27,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-21 01:57:27,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:57:27,245 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 8 treesize of output 7 [2021-11-21 01:57:27,810 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 01:57:27,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:57:29,142 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 01:57:29,143 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:57:29,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1041051387] [2021-11-21 01:57:29,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1041051387] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:57:29,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2102598740] [2021-11-21 01:57:29,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 01:57:29,143 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:57:29,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:57:29,144 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:57:29,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-11-21 01:57:29,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 01:57:29,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:57:29,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-21 01:57:29,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:57:29,895 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:57:29,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:57:30,542 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:57:30,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2102598740] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:57:30,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181732149] [2021-11-21 01:57:30,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 01:57:30,543 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:57:30,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:57:30,555 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:57:30,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-21 01:57:30,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 01:57:30,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:57:30,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-21 01:57:30,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:57:30,657 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 8 treesize of output 7 [2021-11-21 01:57:30,992 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 01:57:30,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:57:31,777 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 01:57:31,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181732149] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:57:31,777 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:57:31,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 10, 9, 7, 7] total 28 [2021-11-21 01:57:31,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677947975] [2021-11-21 01:57:31,778 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:57:31,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-21 01:57:31,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:57:31,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-21 01:57:31,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2021-11-21 01:57:31,780 INFO L87 Difference]: Start difference. First operand 86 states and 104 transitions. Second operand has 28 states, 28 states have (on average 3.142857142857143) internal successors, (88), 28 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:57:35,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:57:35,312 INFO L93 Difference]: Finished difference Result 139 states and 158 transitions. [2021-11-21 01:57:35,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-21 01:57:35,313 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.142857142857143) internal successors, (88), 28 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-21 01:57:35,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:57:35,314 INFO L225 Difference]: With dead ends: 139 [2021-11-21 01:57:35,314 INFO L226 Difference]: Without dead ends: 136 [2021-11-21 01:57:35,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=321, Invalid=1401, Unknown=0, NotChecked=0, Total=1722 [2021-11-21 01:57:35,316 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 360 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-21 01:57:35,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [360 Valid, 279 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 418 Invalid, 0 Unknown, 62 Unchecked, 1.8s Time] [2021-11-21 01:57:35,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-11-21 01:57:35,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 124. [2021-11-21 01:57:35,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 118 states have (on average 1.305084745762712) internal successors, (154), 123 states have internal predecessors, (154), 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) [2021-11-21 01:57:35,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 154 transitions. [2021-11-21 01:57:35,323 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 154 transitions. Word has length 26 [2021-11-21 01:57:35,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:57:35,324 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 154 transitions. [2021-11-21 01:57:35,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.142857142857143) internal successors, (88), 28 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:57:35,324 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 154 transitions. [2021-11-21 01:57:35,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-21 01:57:35,326 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:57:35,326 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:57:35,329 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2021-11-21 01:57:35,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-21 01:57:35,760 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-21 01:57:35,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:57:35,936 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-21 01:57:35,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:57:35,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1073263164, now seen corresponding path program 1 times [2021-11-21 01:57:35,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:57:35,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1058433939] [2021-11-21 01:57:35,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:57:35,937 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:57:35,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:57:35,938 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:57:35,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-21 01:57:35,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:57:35,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 01:57:35,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:57:36,077 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 01:57:36,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:57:36,200 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 01:57:36,200 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:57:36,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1058433939] [2021-11-21 01:57:36,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1058433939] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:57:36,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1861462347] [2021-11-21 01:57:36,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:57:36,201 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:57:36,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:57:36,202 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:57:36,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-11-21 01:57:36,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:57:36,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 01:57:36,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:57:36,396 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 01:57:36,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:57:36,489 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 01:57:36,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1861462347] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:57:36,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092975100] [2021-11-21 01:57:36,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:57:36,490 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:57:36,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:57:36,490 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:57:36,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-21 01:57:36,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:57:36,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 01:57:36,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:57:36,617 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 01:57:36,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:57:36,692 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 01:57:36,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092975100] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:57:36,692 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:57:36,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 9 [2021-11-21 01:57:36,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369340865] [2021-11-21 01:57:36,693 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:57:36,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-21 01:57:36,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:57:36,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-21 01:57:36,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-21 01:57:36,694 INFO L87 Difference]: Start difference. First operand 124 states and 154 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 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) [2021-11-21 01:57:36,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:57:36,929 INFO L93 Difference]: Finished difference Result 114 states and 128 transitions. [2021-11-21 01:57:36,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-21 01:57:36,935 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 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 29 [2021-11-21 01:57:36,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:57:36,938 INFO L225 Difference]: With dead ends: 114 [2021-11-21 01:57:36,938 INFO L226 Difference]: Without dead ends: 114 [2021-11-21 01:57:36,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-21 01:57:36,940 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 47 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:57:36,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 124 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:57:36,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-11-21 01:57:36,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 109. [2021-11-21 01:57:36,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 104 states have (on average 1.1923076923076923) internal successors, (124), 108 states have internal predecessors, (124), 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) [2021-11-21 01:57:36,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 124 transitions. [2021-11-21 01:57:36,945 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 124 transitions. Word has length 29 [2021-11-21 01:57:36,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:57:36,946 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 124 transitions. [2021-11-21 01:57:36,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 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) [2021-11-21 01:57:36,946 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 124 transitions. [2021-11-21 01:57:36,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-21 01:57:36,950 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:57:36,951 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] [2021-11-21 01:57:36,961 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2021-11-21 01:57:37,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-21 01:57:37,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-21 01:57:37,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:57:37,554 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-21 01:57:37,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:57:37,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1088586340, now seen corresponding path program 1 times [2021-11-21 01:57:37,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:57:37,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1640888203] [2021-11-21 01:57:37,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:57:37,555 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:57:37,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:57:37,557 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:57:37,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-21 01:57:37,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:57:37,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-21 01:57:37,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:57:37,642 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 13 treesize of output 12 [2021-11-21 01:57:38,544 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 01:57:38,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:57:40,121 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 01:57:40,121 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:57:40,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1640888203] [2021-11-21 01:57:40,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1640888203] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:57:40,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [888984731] [2021-11-21 01:57:40,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:57:40,121 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:57:40,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:57:40,122 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:57:40,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2021-11-21 01:57:40,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:57:40,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-21 01:57:40,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:57:40,246 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 8 treesize of output 7 [2021-11-21 01:57:41,273 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:57:41,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:57:42,858 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:57:42,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [888984731] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:57:42,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77421207] [2021-11-21 01:57:42,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:57:42,859 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:57:42,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:57:42,860 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:57:42,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-21 01:57:42,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:57:42,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-21 01:57:42,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:57:42,941 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 13 treesize of output 12 [2021-11-21 01:57:43,408 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 01:57:43,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:57:44,108 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 01:57:44,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77421207] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:57:44,109 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:57:44,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 10, 9, 7, 6] total 25 [2021-11-21 01:57:44,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870856596] [2021-11-21 01:57:44,109 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:57:44,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-21 01:57:44,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:57:44,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-21 01:57:44,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2021-11-21 01:57:44,111 INFO L87 Difference]: Start difference. First operand 109 states and 124 transitions. Second operand has 26 states, 25 states have (on average 3.6) internal successors, (90), 26 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:57:45,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:57:45,081 INFO L93 Difference]: Finished difference Result 109 states and 122 transitions. [2021-11-21 01:57:45,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-21 01:57:45,082 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 3.6) internal successors, (90), 26 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-21 01:57:45,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:57:45,083 INFO L225 Difference]: With dead ends: 109 [2021-11-21 01:57:45,083 INFO L226 Difference]: Without dead ends: 92 [2021-11-21 01:57:45,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 149 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=180, Invalid=812, Unknown=0, NotChecked=0, Total=992 [2021-11-21 01:57:45,085 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 38 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:57:45,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 190 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 108 Invalid, 0 Unknown, 71 Unchecked, 0.4s Time] [2021-11-21 01:57:45,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-11-21 01:57:45,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2021-11-21 01:57:45,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 86 states have (on average 1.2093023255813953) internal successors, (104), 90 states have internal predecessors, (104), 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) [2021-11-21 01:57:45,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 104 transitions. [2021-11-21 01:57:45,089 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 104 transitions. Word has length 30 [2021-11-21 01:57:45,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:57:45,089 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 104 transitions. [2021-11-21 01:57:45,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 3.6) internal successors, (90), 26 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:57:45,090 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 104 transitions. [2021-11-21 01:57:45,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-21 01:57:45,091 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:57:45,091 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1] [2021-11-21 01:57:45,102 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2021-11-21 01:57:45,317 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-21 01:57:45,502 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (32)] Ended with exit code 0 [2021-11-21 01:57:45,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:57:45,694 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-21 01:57:45,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:57:45,694 INFO L85 PathProgramCache]: Analyzing trace with hash -563143139, now seen corresponding path program 3 times [2021-11-21 01:57:45,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:57:45,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1322657748] [2021-11-21 01:57:45,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:57:45,695 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:57:45,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:57:45,696 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:57:45,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-21 01:57:45,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-21 01:57:45,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:57:45,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-21 01:57:45,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:57:45,890 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 8 treesize of output 7 [2021-11-21 01:57:46,802 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:57:46,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:57:51,534 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:57:51,534 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:57:51,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1322657748] [2021-11-21 01:57:51,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1322657748] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:57:51,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1788084920] [2021-11-21 01:57:51,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:57:51,535 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:57:51,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:57:51,536 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:57:51,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2021-11-21 01:57:51,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-21 01:57:51,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:57:51,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-21 01:57:51,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:57:52,114 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 8 treesize of output 7 [2021-11-21 01:57:53,379 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:57:53,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:58:04,736 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:58:04,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1788084920] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:58:04,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715277752] [2021-11-21 01:58:04,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:58:04,736 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:58:04,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:58:04,737 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:58:04,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-21 01:58:05,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-21 01:58:05,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:58:05,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-21 01:58:05,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:58:05,908 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 8 treesize of output 7 [2021-11-21 01:58:06,711 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:58:06,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:58:14,780 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:58:14,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715277752] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:58:14,780 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:58:14,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 15, 15, 14, 14] total 51 [2021-11-21 01:58:14,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173988782] [2021-11-21 01:58:14,781 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:58:14,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-11-21 01:58:14,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:58:14,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-11-21 01:58:14,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=733, Invalid=1919, Unknown=0, NotChecked=0, Total=2652 [2021-11-21 01:58:14,784 INFO L87 Difference]: Start difference. First operand 91 states and 104 transitions. Second operand has 52 states, 51 states have (on average 2.9019607843137254) internal successors, (148), 52 states have internal predecessors, (148), 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) [2021-11-21 01:58:19,869 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:58:21,881 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:58:23,887 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:58:25,952 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:58:34,313 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:58:36,315 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:58:38,359 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:58:40,374 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:58:47,320 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:58:49,373 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:58:55,140 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:59:06,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:59:06,700 INFO L93 Difference]: Finished difference Result 739 states and 848 transitions. [2021-11-21 01:59:06,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-21 01:59:06,702 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 2.9019607843137254) internal successors, (148), 52 states have internal predecessors, (148), 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 34 [2021-11-21 01:59:06,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:59:06,706 INFO L225 Difference]: With dead ends: 739 [2021-11-21 01:59:06,707 INFO L226 Difference]: Without dead ends: 739 [2021-11-21 01:59:06,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 149 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2030 ImplicationChecksByTransitivity, 33.9s TimeCoverageRelationStatistics Valid=1298, Invalid=3258, Unknown=0, NotChecked=0, Total=4556 [2021-11-21 01:59:06,709 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 2019 mSDsluCounter, 970 mSDsCounter, 0 mSdLazyCounter, 1220 mSolverCounterSat, 81 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2019 SdHoareTripleChecker+Valid, 1036 SdHoareTripleChecker+Invalid, 1392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1220 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 30.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:59:06,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2019 Valid, 1036 Invalid, 1392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1220 Invalid, 9 Unknown, 82 Unchecked, 30.3s Time] [2021-11-21 01:59:06,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states. [2021-11-21 01:59:06,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 123. [2021-11-21 01:59:06,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 118 states have (on average 1.2203389830508475) internal successors, (144), 122 states have internal predecessors, (144), 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) [2021-11-21 01:59:06,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 144 transitions. [2021-11-21 01:59:06,718 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 144 transitions. Word has length 34 [2021-11-21 01:59:06,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:59:06,718 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 144 transitions. [2021-11-21 01:59:06,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 2.9019607843137254) internal successors, (148), 52 states have internal predecessors, (148), 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) [2021-11-21 01:59:06,719 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 144 transitions. [2021-11-21 01:59:06,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-21 01:59:06,719 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:59:06,720 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:59:06,734 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (35)] Ended with exit code 0 [2021-11-21 01:59:06,933 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (36)] Forceful destruction successful, exit code 0 [2021-11-21 01:59:07,158 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-21 01:59:07,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:59:07,331 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-21 01:59:07,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:59:07,332 INFO L85 PathProgramCache]: Analyzing trace with hash 589547922, now seen corresponding path program 1 times [2021-11-21 01:59:07,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:59:07,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1931211101] [2021-11-21 01:59:07,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:59:07,332 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:59:07,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:59:07,333 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:59:07,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-11-21 01:59:07,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:59:07,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-21 01:59:07,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:59:07,421 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 13 treesize of output 12 [2021-11-21 01:59:08,433 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 01:59:08,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:59:09,993 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 01:59:09,993 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:59:09,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1931211101] [2021-11-21 01:59:09,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1931211101] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:59:09,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1987081847] [2021-11-21 01:59:09,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:59:09,994 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:59:09,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:59:09,999 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:59:10,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2021-11-21 01:59:10,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:59:10,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-21 01:59:10,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:59:10,166 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 8 treesize of output 7 [2021-11-21 01:59:11,665 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:59:11,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:59:13,891 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:59:13,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1987081847] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:59:13,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616239555] [2021-11-21 01:59:13,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:59:13,892 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:59:13,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:59:13,893 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:59:13,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-21 01:59:13,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:59:13,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-21 01:59:13,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:59:13,973 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 13 treesize of output 12 [2021-11-21 01:59:14,590 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 01:59:14,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:59:15,249 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 01:59:15,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616239555] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:59:15,250 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:59:15,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 11, 10, 7, 6] total 27 [2021-11-21 01:59:15,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103194370] [2021-11-21 01:59:15,250 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:59:15,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-21 01:59:15,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:59:15,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-21 01:59:15,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=631, Unknown=0, NotChecked=0, Total=756 [2021-11-21 01:59:15,252 INFO L87 Difference]: Start difference. First operand 123 states and 144 transitions. Second operand has 28 states, 27 states have (on average 3.6296296296296298) internal successors, (98), 28 states have internal predecessors, (98), 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) [2021-11-21 01:59:18,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:59:18,095 INFO L93 Difference]: Finished difference Result 167 states and 192 transitions. [2021-11-21 01:59:18,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-21 01:59:18,103 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 3.6296296296296298) internal successors, (98), 28 states have internal predecessors, (98), 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 34 [2021-11-21 01:59:18,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:59:18,105 INFO L225 Difference]: With dead ends: 167 [2021-11-21 01:59:18,105 INFO L226 Difference]: Without dead ends: 167 [2021-11-21 01:59:18,106 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 176 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=285, Invalid=1437, Unknown=0, NotChecked=0, Total=1722 [2021-11-21 01:59:18,107 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 104 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 129 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:59:18,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 223 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 131 Invalid, 0 Unknown, 129 Unchecked, 0.5s Time] [2021-11-21 01:59:18,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-11-21 01:59:18,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 141. [2021-11-21 01:59:18,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 136 states have (on average 1.213235294117647) internal successors, (165), 140 states have internal predecessors, (165), 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) [2021-11-21 01:59:18,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 165 transitions. [2021-11-21 01:59:18,114 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 165 transitions. Word has length 34 [2021-11-21 01:59:18,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:59:18,115 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 165 transitions. [2021-11-21 01:59:18,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 3.6296296296296298) internal successors, (98), 28 states have internal predecessors, (98), 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) [2021-11-21 01:59:18,115 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 165 transitions. [2021-11-21 01:59:18,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-21 01:59:18,116 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:59:18,116 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:59:18,131 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2021-11-21 01:59:18,333 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (39)] Forceful destruction successful, exit code 0 [2021-11-21 01:59:18,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-11-21 01:59:18,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:59:18,731 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-21 01:59:18,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:59:18,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1100861235, now seen corresponding path program 1 times [2021-11-21 01:59:18,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:59:18,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [111156893] [2021-11-21 01:59:18,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:59:18,732 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:59:18,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:59:18,733 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:59:18,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-11-21 01:59:18,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:59:18,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-21 01:59:18,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:59:18,822 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 13 treesize of output 12 [2021-11-21 01:59:19,611 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 01:59:19,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:59:21,359 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 01:59:21,359 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:59:21,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [111156893] [2021-11-21 01:59:21,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [111156893] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:59:21,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1053438646] [2021-11-21 01:59:21,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:59:21,360 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:59:21,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:59:21,361 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:59:21,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process [2021-11-21 01:59:21,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:59:21,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-21 01:59:21,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:59:21,515 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 8 treesize of output 7 [2021-11-21 01:59:22,992 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:59:22,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:59:26,042 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:59:26,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1053438646] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:59:26,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671700171] [2021-11-21 01:59:26,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:59:26,043 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:59:26,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:59:26,044 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:59:26,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-11-21 01:59:26,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:59:26,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-21 01:59:26,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:59:26,147 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 13 treesize of output 12 [2021-11-21 01:59:26,727 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 01:59:26,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:59:29,129 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 01:59:29,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671700171] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:59:29,129 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:59:29,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 12, 11, 8, 7] total 35 [2021-11-21 01:59:29,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697475062] [2021-11-21 01:59:29,129 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:59:29,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-21 01:59:29,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:59:29,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-21 01:59:29,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1069, Unknown=0, NotChecked=0, Total=1260 [2021-11-21 01:59:29,131 INFO L87 Difference]: Start difference. First operand 141 states and 165 transitions. Second operand has 36 states, 35 states have (on average 3.7714285714285714) internal successors, (132), 36 states have internal predecessors, (132), 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) [2021-11-21 01:59:32,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:59:32,838 INFO L93 Difference]: Finished difference Result 169 states and 195 transitions. [2021-11-21 01:59:32,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-21 01:59:32,841 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 3.7714285714285714) internal successors, (132), 36 states have internal predecessors, (132), 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 37 [2021-11-21 01:59:32,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:59:32,842 INFO L225 Difference]: With dead ends: 169 [2021-11-21 01:59:32,842 INFO L226 Difference]: Without dead ends: 169 [2021-11-21 01:59:32,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 190 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=288, Invalid=1604, Unknown=0, NotChecked=0, Total=1892 [2021-11-21 01:59:32,844 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 115 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:59:32,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 323 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 195 Invalid, 0 Unknown, 93 Unchecked, 2.0s Time] [2021-11-21 01:59:32,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-11-21 01:59:32,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 145. [2021-11-21 01:59:32,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 140 states have (on average 1.207142857142857) internal successors, (169), 144 states have internal predecessors, (169), 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) [2021-11-21 01:59:32,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 169 transitions. [2021-11-21 01:59:32,850 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 169 transitions. Word has length 37 [2021-11-21 01:59:32,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:59:32,850 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 169 transitions. [2021-11-21 01:59:32,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 3.7714285714285714) internal successors, (132), 36 states have internal predecessors, (132), 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) [2021-11-21 01:59:32,850 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 169 transitions. [2021-11-21 01:59:32,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-21 01:59:32,851 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:59:32,851 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:59:32,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (42)] Forceful destruction successful, exit code 0 [2021-11-21 01:59:33,064 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2021-11-21 01:59:33,284 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-11-21 01:59:33,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:59:33,455 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-21 01:59:33,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:59:33,455 INFO L85 PathProgramCache]: Analyzing trace with hash -233038531, now seen corresponding path program 1 times [2021-11-21 01:59:33,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:59:33,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2041462841] [2021-11-21 01:59:33,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:59:33,456 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:59:33,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:59:33,457 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:59:33,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2021-11-21 01:59:33,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:59:33,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-21 01:59:33,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:59:33,580 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 13 treesize of output 12 [2021-11-21 01:59:34,491 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 01:59:34,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:59:36,590 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 01:59:36,590 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:59:36,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2041462841] [2021-11-21 01:59:36,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2041462841] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:59:36,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [989592687] [2021-11-21 01:59:36,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:59:36,591 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:59:36,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:59:36,591 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:59:36,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (45)] Waiting until timeout for monitored process [2021-11-21 01:59:36,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:59:36,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-21 01:59:36,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:59:36,770 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 8 treesize of output 7 [2021-11-21 01:59:38,364 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:59:38,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:59:41,549 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:59:41,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [989592687] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:59:41,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159682712] [2021-11-21 01:59:41,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:59:41,550 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:59:41,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:59:41,550 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:59:41,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-11-21 01:59:41,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:59:41,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-21 01:59:41,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:59:41,634 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 13 treesize of output 12 [2021-11-21 01:59:42,213 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 01:59:42,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:59:44,426 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 01:59:44,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159682712] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:59:44,426 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:59:44,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 12, 11, 8, 7] total 35 [2021-11-21 01:59:44,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304865715] [2021-11-21 01:59:44,429 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:59:44,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-21 01:59:44,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:59:44,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-21 01:59:44,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1069, Unknown=0, NotChecked=0, Total=1260 [2021-11-21 01:59:44,430 INFO L87 Difference]: Start difference. First operand 145 states and 169 transitions. Second operand has 36 states, 35 states have (on average 3.857142857142857) internal successors, (135), 36 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:59:48,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:59:48,484 INFO L93 Difference]: Finished difference Result 172 states and 198 transitions. [2021-11-21 01:59:48,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-21 01:59:48,486 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 3.857142857142857) internal successors, (135), 36 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-11-21 01:59:48,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:59:48,487 INFO L225 Difference]: With dead ends: 172 [2021-11-21 01:59:48,487 INFO L226 Difference]: Without dead ends: 172 [2021-11-21 01:59:48,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 195 SyntacticMatches, 6 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 639 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=288, Invalid=1604, Unknown=0, NotChecked=0, Total=1892 [2021-11-21 01:59:48,489 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 107 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:59:48,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 261 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 249 Invalid, 0 Unknown, 28 Unchecked, 2.5s Time] [2021-11-21 01:59:48,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-11-21 01:59:48,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 149. [2021-11-21 01:59:48,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 144 states have (on average 1.2013888888888888) internal successors, (173), 148 states have internal predecessors, (173), 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) [2021-11-21 01:59:48,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 173 transitions. [2021-11-21 01:59:48,495 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 173 transitions. Word has length 38 [2021-11-21 01:59:48,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:59:48,495 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 173 transitions. [2021-11-21 01:59:48,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 3.857142857142857) internal successors, (135), 36 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:59:48,496 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 173 transitions. [2021-11-21 01:59:48,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-21 01:59:48,496 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:59:48,496 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:59:48,521 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2021-11-21 01:59:48,732 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-11-21 01:59:48,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (45)] Forceful destruction successful, exit code 0 [2021-11-21 01:59:49,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt [2021-11-21 01:59:49,109 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-21 01:59:49,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:59:49,110 INFO L85 PathProgramCache]: Analyzing trace with hash 105294, now seen corresponding path program 1 times [2021-11-21 01:59:49,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:59:49,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [15732634] [2021-11-21 01:59:49,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:59:49,111 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:59:49,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:59:49,111 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:59:49,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2021-11-21 01:59:49,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:59:49,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-21 01:59:49,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:59:49,211 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 13 treesize of output 12 [2021-11-21 01:59:50,723 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-21 01:59:50,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:59:52,154 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-21 01:59:52,155 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:59:52,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [15732634] [2021-11-21 01:59:52,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [15732634] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:59:52,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1160011185] [2021-11-21 01:59:52,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:59:52,155 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:59:52,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:59:52,156 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:59:52,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (48)] Waiting until timeout for monitored process [2021-11-21 01:59:52,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:59:52,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-21 01:59:52,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:59:52,383 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 8 treesize of output 7 [2021-11-21 01:59:53,799 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-21 01:59:53,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:59:55,837 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-21 01:59:55,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1160011185] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:59:55,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383976994] [2021-11-21 01:59:55,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:59:55,838 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:59:55,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:59:55,838 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:59:55,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-11-21 01:59:55,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:59:55,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-21 01:59:55,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:59:55,914 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 13 treesize of output 12 [2021-11-21 01:59:56,471 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-21 01:59:56,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:59:57,204 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-21 01:59:57,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383976994] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:59:57,204 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:59:57,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 11, 10, 7, 6] total 27 [2021-11-21 01:59:57,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26352060] [2021-11-21 01:59:57,204 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:59:57,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-21 01:59:57,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:59:57,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-21 01:59:57,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=631, Unknown=0, NotChecked=0, Total=756 [2021-11-21 01:59:57,206 INFO L87 Difference]: Start difference. First operand 149 states and 173 transitions. Second operand has 28 states, 27 states have (on average 4.296296296296297) internal successors, (116), 28 states have internal predecessors, (116), 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) [2021-11-21 01:59:59,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:59:59,125 INFO L93 Difference]: Finished difference Result 189 states and 216 transitions. [2021-11-21 01:59:59,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-21 01:59:59,126 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 4.296296296296297) internal successors, (116), 28 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-21 01:59:59,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:59:59,127 INFO L225 Difference]: With dead ends: 189 [2021-11-21 01:59:59,128 INFO L226 Difference]: Without dead ends: 189 [2021-11-21 01:59:59,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 219 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=207, Invalid=1125, Unknown=0, NotChecked=0, Total=1332 [2021-11-21 01:59:59,129 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 106 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-21 01:59:59,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 225 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 160 Invalid, 0 Unknown, 86 Unchecked, 0.9s Time] [2021-11-21 01:59:59,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-11-21 01:59:59,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 154. [2021-11-21 01:59:59,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 149 states have (on average 1.2013422818791946) internal successors, (179), 153 states have internal predecessors, (179), 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) [2021-11-21 01:59:59,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 179 transitions. [2021-11-21 01:59:59,134 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 179 transitions. Word has length 41 [2021-11-21 01:59:59,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:59:59,135 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 179 transitions. [2021-11-21 01:59:59,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 4.296296296296297) internal successors, (116), 28 states have internal predecessors, (116), 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) [2021-11-21 01:59:59,135 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 179 transitions. [2021-11-21 01:59:59,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-21 01:59:59,136 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:59:59,136 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:59:59,169 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-11-21 01:59:59,367 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2021-11-21 01:59:59,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (48)] Forceful destruction successful, exit code 0 [2021-11-21 01:59:59,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt [2021-11-21 01:59:59,760 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-21 01:59:59,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:59:59,760 INFO L85 PathProgramCache]: Analyzing trace with hash -464583823, now seen corresponding path program 1 times [2021-11-21 01:59:59,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:59:59,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [747637080] [2021-11-21 01:59:59,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:59:59,761 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:59:59,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:59:59,762 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:59:59,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2021-11-21 01:59:59,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:59:59,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-21 01:59:59,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:59:59,864 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 13 treesize of output 12 [2021-11-21 02:00:02,660 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 02:00:02,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 02:00:04,714 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 02:00:04,714 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 02:00:04,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [747637080] [2021-11-21 02:00:04,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [747637080] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 02:00:04,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [135301603] [2021-11-21 02:00:04,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 02:00:04,715 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 02:00:04,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 02:00:04,721 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 02:00:04,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (51)] Waiting until timeout for monitored process [2021-11-21 02:00:04,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 02:00:04,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-21 02:00:04,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 02:00:04,891 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 8 treesize of output 7 [2021-11-21 02:00:06,345 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 02:00:06,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 02:00:08,501 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 02:00:08,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [135301603] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 02:00:08,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871142] [2021-11-21 02:00:08,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 02:00:08,502 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 02:00:08,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 02:00:08,523 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 02:00:08,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-11-21 02:00:08,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 02:00:08,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-21 02:00:08,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 02:00:08,633 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 13 treesize of output 12 [2021-11-21 02:00:09,352 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 02:00:09,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 02:00:10,631 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 02:00:10,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871142] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 02:00:10,632 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 02:00:10,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 12, 11, 8, 7] total 30 [2021-11-21 02:00:10,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419038014] [2021-11-21 02:00:10,632 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 02:00:10,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-21 02:00:10,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 02:00:10,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-21 02:00:10,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=793, Unknown=0, NotChecked=0, Total=930 [2021-11-21 02:00:10,633 INFO L87 Difference]: Start difference. First operand 154 states and 179 transitions. Second operand has 31 states, 30 states have (on average 4.166666666666667) internal successors, (125), 31 states have internal predecessors, (125), 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) [2021-11-21 02:00:12,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 02:00:12,374 INFO L93 Difference]: Finished difference Result 198 states and 231 transitions. [2021-11-21 02:00:12,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-21 02:00:12,376 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 4.166666666666667) internal successors, (125), 31 states have internal predecessors, (125), 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 43 [2021-11-21 02:00:12,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 02:00:12,377 INFO L225 Difference]: With dead ends: 198 [2021-11-21 02:00:12,378 INFO L226 Difference]: Without dead ends: 198 [2021-11-21 02:00:12,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=215, Invalid=1191, Unknown=0, NotChecked=0, Total=1406 [2021-11-21 02:00:12,379 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 114 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-21 02:00:12,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 349 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 163 Invalid, 0 Unknown, 99 Unchecked, 1.1s Time] [2021-11-21 02:00:12,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-11-21 02:00:12,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 160. [2021-11-21 02:00:12,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 155 states have (on average 1.2) internal successors, (186), 159 states have internal predecessors, (186), 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) [2021-11-21 02:00:12,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 186 transitions. [2021-11-21 02:00:12,386 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 186 transitions. Word has length 43 [2021-11-21 02:00:12,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 02:00:12,386 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 186 transitions. [2021-11-21 02:00:12,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 4.166666666666667) internal successors, (125), 31 states have internal predecessors, (125), 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) [2021-11-21 02:00:12,386 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 186 transitions. [2021-11-21 02:00:12,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-21 02:00:12,391 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 02:00:12,391 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 02:00:12,400 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2021-11-21 02:00:12,593 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (51)] Forceful destruction successful, exit code 0 [2021-11-21 02:00:12,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-11-21 02:00:12,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 02:00:12,992 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-21 02:00:12,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 02:00:12,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1517190569, now seen corresponding path program 1 times [2021-11-21 02:00:12,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 02:00:12,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [514153026] [2021-11-21 02:00:12,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 02:00:12,992 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 02:00:12,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 02:00:12,993 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 02:00:12,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2021-11-21 02:00:13,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 02:00:13,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 02:00:13,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 02:00:13,158 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 02:00:13,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 02:00:13,316 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 02:00:13,317 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 02:00:13,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [514153026] [2021-11-21 02:00:13,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [514153026] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 02:00:13,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2146265784] [2021-11-21 02:00:13,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 02:00:13,318 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 02:00:13,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 02:00:13,332 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 02:00:13,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (54)] Waiting until timeout for monitored process [2021-11-21 02:00:13,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 02:00:13,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 02:00:13,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 02:00:13,540 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 02:00:13,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 02:00:13,631 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 02:00:13,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2146265784] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 02:00:13,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020556513] [2021-11-21 02:00:13,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 02:00:13,632 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 02:00:13,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 02:00:13,632 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 02:00:13,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-11-21 02:00:13,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 02:00:13,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 02:00:13,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 02:00:13,836 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 02:00:13,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 02:00:14,158 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 02:00:14,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020556513] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 02:00:14,158 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 02:00:14,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 8, 9] total 16 [2021-11-21 02:00:14,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614077713] [2021-11-21 02:00:14,159 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 02:00:14,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-21 02:00:14,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 02:00:14,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-21 02:00:14,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-21 02:00:14,161 INFO L87 Difference]: Start difference. First operand 160 states and 186 transitions. Second operand has 16 states, 16 states have (on average 5.0) internal successors, (80), 16 states have internal predecessors, (80), 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) [2021-11-21 02:00:17,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 02:00:17,180 INFO L93 Difference]: Finished difference Result 466 states and 510 transitions. [2021-11-21 02:00:17,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-11-21 02:00:17,180 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.0) internal successors, (80), 16 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-21 02:00:17,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 02:00:17,183 INFO L225 Difference]: With dead ends: 466 [2021-11-21 02:00:17,183 INFO L226 Difference]: Without dead ends: 466 [2021-11-21 02:00:17,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1487 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=862, Invalid=3560, Unknown=0, NotChecked=0, Total=4422 [2021-11-21 02:00:17,185 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 757 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 757 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-21 02:00:17,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [757 Valid, 197 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-21 02:00:17,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-11-21 02:00:17,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 275. [2021-11-21 02:00:17,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 270 states have (on average 1.2555555555555555) internal successors, (339), 274 states have internal predecessors, (339), 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) [2021-11-21 02:00:17,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 339 transitions. [2021-11-21 02:00:17,198 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 339 transitions. Word has length 44 [2021-11-21 02:00:17,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 02:00:17,198 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 339 transitions. [2021-11-21 02:00:17,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.0) internal successors, (80), 16 states have internal predecessors, (80), 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) [2021-11-21 02:00:17,199 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 339 transitions. [2021-11-21 02:00:17,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-21 02:00:17,199 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 02:00:17,200 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 02:00:17,215 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (53)] Forceful destruction successful, exit code 0 [2021-11-21 02:00:17,442 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-11-21 02:00:17,617 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (54)] Forceful destruction successful, exit code 0 [2021-11-21 02:00:17,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt [2021-11-21 02:00:17,815 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-21 02:00:17,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 02:00:17,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1158163465, now seen corresponding path program 2 times [2021-11-21 02:00:17,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 02:00:17,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1833201254] [2021-11-21 02:00:17,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 02:00:17,816 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 02:00:17,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 02:00:17,817 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 02:00:17,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2021-11-21 02:00:17,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-21 02:00:17,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 02:00:17,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-21 02:00:17,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 02:00:17,907 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 8 treesize of output 7 [2021-11-21 02:00:18,923 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-21 02:00:18,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 02:00:23,867 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-21 02:00:23,867 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 02:00:23,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1833201254] [2021-11-21 02:00:23,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1833201254] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 02:00:23,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [458485887] [2021-11-21 02:00:23,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 02:00:23,867 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 02:00:23,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 02:00:23,868 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 02:00:23,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (57)] Waiting until timeout for monitored process [2021-11-21 02:00:23,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-21 02:00:23,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 02:00:23,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-21 02:00:23,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 02:00:23,976 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 8 treesize of output 7 [2021-11-21 02:00:25,316 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-21 02:00:25,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 02:00:25,687 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-21 02:00:25,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [458485887] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-21 02:00:25,687 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-21 02:00:25,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9, 10, 9] total 21 [2021-11-21 02:00:25,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838908620] [2021-11-21 02:00:25,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 02:00:25,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 02:00:25,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 02:00:25,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 02:00:25,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2021-11-21 02:00:25,688 INFO L87 Difference]: Start difference. First operand 275 states and 339 transitions. Second operand has 7 states, 6 states have (on average 5.666666666666667) internal successors, (34), 7 states have internal predecessors, (34), 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) [2021-11-21 02:00:29,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 02:00:29,001 INFO L93 Difference]: Finished difference Result 295 states and 358 transitions. [2021-11-21 02:00:29,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-21 02:00:29,003 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.666666666666667) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-21 02:00:29,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 02:00:29,005 INFO L225 Difference]: With dead ends: 295 [2021-11-21 02:00:29,005 INFO L226 Difference]: Without dead ends: 295 [2021-11-21 02:00:29,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 151 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=140, Invalid=562, Unknown=0, NotChecked=0, Total=702 [2021-11-21 02:00:29,006 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 49 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-21 02:00:29,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 57 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-21 02:00:29,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-11-21 02:00:29,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 286. [2021-11-21 02:00:29,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 281 states have (on average 1.2384341637010676) internal successors, (348), 285 states have internal predecessors, (348), 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) [2021-11-21 02:00:29,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 348 transitions. [2021-11-21 02:00:29,016 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 348 transitions. Word has length 44 [2021-11-21 02:00:29,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 02:00:29,016 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 348 transitions. [2021-11-21 02:00:29,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.666666666666667) internal successors, (34), 7 states have internal predecessors, (34), 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) [2021-11-21 02:00:29,017 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 348 transitions. [2021-11-21 02:00:29,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-21 02:00:29,017 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 02:00:29,018 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 02:00:29,032 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (56)] Forceful destruction successful, exit code 0 [2021-11-21 02:00:29,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (57)] Forceful destruction successful, exit code 0 [2021-11-21 02:00:29,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt [2021-11-21 02:00:29,431 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-21 02:00:29,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 02:00:29,432 INFO L85 PathProgramCache]: Analyzing trace with hash -2032053004, now seen corresponding path program 1 times [2021-11-21 02:00:29,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 02:00:29,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2040103727] [2021-11-21 02:00:29,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 02:00:29,433 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 02:00:29,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 02:00:29,434 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 02:00:29,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2021-11-21 02:00:29,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 02:00:29,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-21 02:00:29,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 02:00:29,535 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 13 treesize of output 12 [2021-11-21 02:00:30,468 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 02:00:30,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 02:00:32,211 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 02:00:32,211 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 02:00:32,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2040103727] [2021-11-21 02:00:32,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2040103727] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 02:00:32,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1871018963] [2021-11-21 02:00:32,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 02:00:32,213 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 02:00:32,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 02:00:32,214 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 02:00:32,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (59)] Waiting until timeout for monitored process [2021-11-21 02:00:32,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 02:00:32,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-21 02:00:32,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 02:00:32,435 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 8 treesize of output 7 [2021-11-21 02:00:34,103 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 02:00:34,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 02:00:36,447 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 02:00:36,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1871018963] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 02:00:36,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788275789] [2021-11-21 02:00:36,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 02:00:36,447 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 02:00:36,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 02:00:36,448 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 02:00:36,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-11-21 02:00:36,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 02:00:36,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-21 02:00:36,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 02:00:36,538 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 13 treesize of output 12 [2021-11-21 02:00:37,310 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 02:00:37,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 02:00:40,832 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 02:00:40,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788275789] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 02:00:40,832 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 02:00:40,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 12, 11, 8, 8] total 36 [2021-11-21 02:00:40,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130628678] [2021-11-21 02:00:40,832 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 02:00:40,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-21 02:00:40,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 02:00:40,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-21 02:00:40,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1147, Unknown=0, NotChecked=0, Total=1332 [2021-11-21 02:00:40,835 INFO L87 Difference]: Start difference. First operand 286 states and 348 transitions. Second operand has 37 states, 36 states have (on average 4.611111111111111) internal successors, (166), 37 states have internal predecessors, (166), 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) [2021-11-21 02:00:51,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 02:00:51,005 INFO L93 Difference]: Finished difference Result 455 states and 541 transitions. [2021-11-21 02:00:51,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-21 02:00:51,007 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 4.611111111111111) internal successors, (166), 37 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-21 02:00:51,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 02:00:51,009 INFO L225 Difference]: With dead ends: 455 [2021-11-21 02:00:51,009 INFO L226 Difference]: Without dead ends: 455 [2021-11-21 02:00:51,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 243 SyntacticMatches, 5 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 836 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=384, Invalid=2586, Unknown=0, NotChecked=0, Total=2970 [2021-11-21 02:00:51,011 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 182 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 112 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2021-11-21 02:00:51,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 551 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 356 Invalid, 0 Unknown, 112 Unchecked, 3.9s Time] [2021-11-21 02:00:51,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2021-11-21 02:00:51,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 348. [2021-11-21 02:00:51,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 343 states have (on average 1.2419825072886297) internal successors, (426), 347 states have internal predecessors, (426), 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) [2021-11-21 02:00:51,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 426 transitions. [2021-11-21 02:00:51,021 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 426 transitions. Word has length 46 [2021-11-21 02:00:51,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 02:00:51,021 INFO L470 AbstractCegarLoop]: Abstraction has 348 states and 426 transitions. [2021-11-21 02:00:51,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 4.611111111111111) internal successors, (166), 37 states have internal predecessors, (166), 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) [2021-11-21 02:00:51,022 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 426 transitions. [2021-11-21 02:00:51,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-21 02:00:51,022 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 02:00:51,023 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 02:00:51,061 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-11-21 02:00:51,251 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (58)] Ended with exit code 0 [2021-11-21 02:00:51,445 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (59)] Ended with exit code 0 [2021-11-21 02:00:51,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt [2021-11-21 02:00:51,644 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-21 02:00:51,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 02:00:51,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1430867868, now seen corresponding path program 1 times [2021-11-21 02:00:51,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 02:00:51,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1209080974] [2021-11-21 02:00:51,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 02:00:51,645 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 02:00:51,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 02:00:51,646 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 02:00:51,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (61)] Waiting until timeout for monitored process [2021-11-21 02:00:51,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 02:00:51,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-21 02:00:51,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 02:00:51,753 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 13 treesize of output 12 [2021-11-21 02:00:52,668 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 02:00:52,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 02:00:54,253 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 02:00:54,253 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 02:00:54,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1209080974] [2021-11-21 02:00:54,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1209080974] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 02:00:54,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [752554776] [2021-11-21 02:00:54,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 02:00:54,254 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 02:00:54,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 02:00:54,255 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 02:00:54,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (62)] Waiting until timeout for monitored process [2021-11-21 02:00:54,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 02:00:54,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-21 02:00:54,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 02:00:54,423 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 8 treesize of output 7 [2021-11-21 02:00:55,963 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 02:00:55,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 02:00:58,445 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 02:00:58,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [752554776] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 02:00:58,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342137382] [2021-11-21 02:00:58,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 02:00:58,446 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 02:00:58,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 02:00:58,447 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 02:00:58,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-11-21 02:00:58,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 02:00:58,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-21 02:00:58,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 02:00:58,539 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 13 treesize of output 12 [2021-11-21 02:00:59,233 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 02:00:59,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 02:01:02,671 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 02:01:02,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342137382] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 02:01:02,671 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 02:01:02,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 12, 11, 8, 8] total 36 [2021-11-21 02:01:02,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102395868] [2021-11-21 02:01:02,672 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 02:01:02,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-21 02:01:02,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 02:01:02,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-21 02:01:02,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1147, Unknown=0, NotChecked=0, Total=1332 [2021-11-21 02:01:02,674 INFO L87 Difference]: Start difference. First operand 348 states and 426 transitions. Second operand has 37 states, 36 states have (on average 4.694444444444445) internal successors, (169), 37 states have internal predecessors, (169), 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) [2021-11-21 02:01:12,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 02:01:12,266 INFO L93 Difference]: Finished difference Result 441 states and 515 transitions. [2021-11-21 02:01:12,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-21 02:01:12,269 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 4.694444444444445) internal successors, (169), 37 states have internal predecessors, (169), 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 47 [2021-11-21 02:01:12,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 02:01:12,271 INFO L225 Difference]: With dead ends: 441 [2021-11-21 02:01:12,272 INFO L226 Difference]: Without dead ends: 441 [2021-11-21 02:01:12,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 247 SyntacticMatches, 4 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 754 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=358, Invalid=2398, Unknown=0, NotChecked=0, Total=2756 [2021-11-21 02:01:12,273 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 194 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 112 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2021-11-21 02:01:12,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 505 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 386 Invalid, 0 Unknown, 112 Unchecked, 5.0s Time] [2021-11-21 02:01:12,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2021-11-21 02:01:12,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 293. [2021-11-21 02:01:12,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 290 states have (on average 1.193103448275862) internal successors, (346), 292 states have internal predecessors, (346), 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) [2021-11-21 02:01:12,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 346 transitions. [2021-11-21 02:01:12,283 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 346 transitions. Word has length 47 [2021-11-21 02:01:12,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 02:01:12,284 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 346 transitions. [2021-11-21 02:01:12,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 4.694444444444445) internal successors, (169), 37 states have internal predecessors, (169), 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) [2021-11-21 02:01:12,284 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 346 transitions. [2021-11-21 02:01:12,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-21 02:01:12,285 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 02:01:12,285 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 02:01:12,313 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2021-11-21 02:01:12,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (61)] Forceful destruction successful, exit code 0 [2021-11-21 02:01:12,691 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (62)] Forceful destruction successful, exit code 0 [2021-11-21 02:01:12,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt [2021-11-21 02:01:12,886 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-21 02:01:12,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 02:01:12,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1288075469, now seen corresponding path program 3 times [2021-11-21 02:01:12,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 02:01:12,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1054659470] [2021-11-21 02:01:12,887 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 02:01:12,887 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 02:01:12,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 02:01:12,888 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 02:01:12,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (64)] Waiting until timeout for monitored process [2021-11-21 02:01:12,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-21 02:01:12,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 02:01:12,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-21 02:01:12,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 02:01:12,990 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 8 treesize of output 7 [2021-11-21 02:01:14,907 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 19 proven. 3 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-21 02:01:14,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 02:01:31,043 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-21 02:01:31,043 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 02:01:31,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1054659470] [2021-11-21 02:01:31,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1054659470] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 02:01:31,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1571706756] [2021-11-21 02:01:31,043 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 02:01:31,043 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 02:01:31,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 02:01:31,045 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 02:01:31,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (65)] Waiting until timeout for monitored process [2021-11-21 02:01:31,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-21 02:01:31,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 02:01:31,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-21 02:01:31,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 02:01:31,154 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 8 treesize of output 7 [2021-11-21 02:01:32,102 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 19 proven. 3 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-21 02:01:32,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 02:01:46,784 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-21 02:01:46,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1571706756] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 02:01:46,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506419161] [2021-11-21 02:01:46,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 02:01:46,785 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 02:01:46,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 02:01:46,786 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 02:01:46,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-11-21 02:01:46,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-21 02:01:46,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 02:01:46,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-21 02:01:46,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 02:01:46,905 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 8 treesize of output 7 [2021-11-21 02:01:47,948 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 19 proven. 3 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-21 02:01:47,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 02:02:04,662 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-21 02:02:04,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506419161] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 02:02:04,662 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 02:02:04,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 10, 10, 11, 11] total 30 [2021-11-21 02:02:04,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566169721] [2021-11-21 02:02:04,663 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 02:02:04,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-21 02:02:04,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 02:02:04,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-21 02:02:04,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=730, Unknown=0, NotChecked=0, Total=930 [2021-11-21 02:02:04,665 INFO L87 Difference]: Start difference. First operand 293 states and 346 transitions. Second operand has 31 states, 30 states have (on average 2.6666666666666665) internal successors, (80), 31 states have internal predecessors, (80), 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) [2021-11-21 02:02:09,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 02:02:09,732 INFO L93 Difference]: Finished difference Result 327 states and 378 transitions. [2021-11-21 02:02:09,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-21 02:02:09,734 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.6666666666666665) internal successors, (80), 31 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-21 02:02:09,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 02:02:09,737 INFO L225 Difference]: With dead ends: 327 [2021-11-21 02:02:09,737 INFO L226 Difference]: Without dead ends: 327 [2021-11-21 02:02:09,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 262 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=542, Invalid=1350, Unknown=0, NotChecked=0, Total=1892 [2021-11-21 02:02:09,740 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 302 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 90 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-21 02:02:09,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 112 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 165 Invalid, 0 Unknown, 90 Unchecked, 1.9s Time] [2021-11-21 02:02:09,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-11-21 02:02:09,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 308. [2021-11-21 02:02:09,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 305 states have (on average 1.1770491803278689) internal successors, (359), 307 states have internal predecessors, (359), 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) [2021-11-21 02:02:09,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 359 transitions. [2021-11-21 02:02:09,752 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 359 transitions. Word has length 50 [2021-11-21 02:02:09,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 02:02:09,752 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 359 transitions. [2021-11-21 02:02:09,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.6666666666666665) internal successors, (80), 31 states have internal predecessors, (80), 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) [2021-11-21 02:02:09,753 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 359 transitions. [2021-11-21 02:02:09,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-21 02:02:09,754 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 02:02:09,754 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 02:02:09,761 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (65)] Forceful destruction successful, exit code 0 [2021-11-21 02:02:10,002 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2021-11-21 02:02:10,166 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (64)] Forceful destruction successful, exit code 0 [2021-11-21 02:02:10,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 02:02:10,357 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-21 02:02:10,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 02:02:10,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1956944587, now seen corresponding path program 2 times [2021-11-21 02:02:10,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 02:02:10,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [806951563] [2021-11-21 02:02:10,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 02:02:10,358 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 02:02:10,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 02:02:10,359 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 02:02:10,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (67)] Waiting until timeout for monitored process [2021-11-21 02:02:10,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 02:02:10,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 02:02:10,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-21 02:02:10,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 02:02:10,475 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 13 treesize of output 12 [2021-11-21 02:02:11,714 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-21 02:02:11,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 02:02:16,965 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-21 02:02:16,965 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 02:02:16,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [806951563] [2021-11-21 02:02:16,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [806951563] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 02:02:16,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2051189164] [2021-11-21 02:02:16,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 02:02:16,966 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 02:02:16,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 02:02:16,967 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 02:02:16,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (68)] Waiting until timeout for monitored process [2021-11-21 02:02:17,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 02:02:17,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 02:02:17,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-21 02:02:17,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 02:02:17,190 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 8 treesize of output 7 [2021-11-21 02:02:19,733 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-21 02:02:19,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 02:02:32,154 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-21 02:02:32,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2051189164] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 02:02:32,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517246592] [2021-11-21 02:02:32,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 02:02:32,154 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 02:02:32,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 02:02:32,155 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 02:02:32,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-11-21 02:02:32,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 02:02:32,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 02:02:32,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-21 02:02:32,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 02:02:32,250 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 13 treesize of output 12 [2021-11-21 02:02:33,112 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-21 02:02:33,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 02:02:37,367 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-21 02:02:37,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517246592] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 02:02:37,367 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 02:02:37,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 13, 13, 8, 7] total 41 [2021-11-21 02:02:37,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431691860] [2021-11-21 02:02:37,368 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 02:02:37,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-21 02:02:37,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 02:02:37,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-21 02:02:37,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=1474, Unknown=0, NotChecked=0, Total=1722 [2021-11-21 02:02:37,369 INFO L87 Difference]: Start difference. First operand 308 states and 359 transitions. Second operand has 42 states, 41 states have (on average 4.682926829268292) internal successors, (192), 42 states have internal predecessors, (192), 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) [2021-11-21 02:02:48,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 02:02:48,159 INFO L93 Difference]: Finished difference Result 366 states and 417 transitions. [2021-11-21 02:02:48,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-21 02:02:48,161 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 4.682926829268292) internal successors, (192), 42 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-21 02:02:48,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 02:02:48,163 INFO L225 Difference]: With dead ends: 366 [2021-11-21 02:02:48,163 INFO L226 Difference]: Without dead ends: 366 [2021-11-21 02:02:48,165 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 264 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1087 ImplicationChecksByTransitivity, 19.8s TimeCoverageRelationStatistics Valid=472, Invalid=3068, Unknown=0, NotChecked=0, Total=3540 [2021-11-21 02:02:48,166 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 83 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-11-21 02:02:48,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 302 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 277 Invalid, 0 Unknown, 102 Unchecked, 3.7s Time] [2021-11-21 02:02:48,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-11-21 02:02:48,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 302. [2021-11-21 02:02:48,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 299 states have (on average 1.173913043478261) internal successors, (351), 301 states have internal predecessors, (351), 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) [2021-11-21 02:02:48,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 351 transitions. [2021-11-21 02:02:48,176 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 351 transitions. Word has length 50 [2021-11-21 02:02:48,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 02:02:48,177 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 351 transitions. [2021-11-21 02:02:48,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 4.682926829268292) internal successors, (192), 42 states have internal predecessors, (192), 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) [2021-11-21 02:02:48,177 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 351 transitions. [2021-11-21 02:02:48,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-21 02:02:48,178 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 02:02:48,178 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 02:02:48,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2021-11-21 02:02:48,396 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (68)] Forceful destruction successful, exit code 0 [2021-11-21 02:02:48,601 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (67)] Ended with exit code 0 [2021-11-21 02:02:48,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 02:02:48,792 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-21 02:02:48,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 02:02:48,792 INFO L85 PathProgramCache]: Analyzing trace with hash 537492722, now seen corresponding path program 2 times [2021-11-21 02:02:48,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 02:02:48,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1871113057] [2021-11-21 02:02:48,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 02:02:48,793 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 02:02:48,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 02:02:48,794 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 02:02:48,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (70)] Waiting until timeout for monitored process [2021-11-21 02:02:48,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-21 02:02:48,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 02:02:48,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-21 02:02:48,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 02:02:48,876 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 8 treesize of output 7 [2021-11-21 02:02:50,073 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-21 02:02:50,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 02:03:08,531 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-21 02:03:08,532 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 02:03:08,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1871113057] [2021-11-21 02:03:08,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1871113057] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 02:03:08,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1215179841] [2021-11-21 02:03:08,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 02:03:08,532 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 02:03:08,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 02:03:08,533 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 02:03:08,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (71)] Waiting until timeout for monitored process [2021-11-21 02:03:08,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-21 02:03:08,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 02:03:08,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-21 02:03:08,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 02:03:08,625 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 8 treesize of output 7 [2021-11-21 02:03:10,266 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-21 02:03:10,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 02:03:15,423 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-21 02:03:15,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1215179841] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 02:03:15,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140702500] [2021-11-21 02:03:15,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 02:03:15,424 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 02:03:15,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 02:03:15,425 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 02:03:15,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-11-21 02:03:15,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-21 02:03:15,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 02:03:15,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-21 02:03:15,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 02:03:15,524 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 8 treesize of output 7 [2021-11-21 02:03:16,265 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-21 02:03:16,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 02:03:30,262 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-21 02:03:30,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140702500] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 02:03:30,263 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 02:03:30,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 24 [2021-11-21 02:03:30,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727913781] [2021-11-21 02:03:30,263 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 02:03:30,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-21 02:03:30,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 02:03:30,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-21 02:03:30,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2021-11-21 02:03:30,264 INFO L87 Difference]: Start difference. First operand 302 states and 351 transitions. Second operand has 25 states, 24 states have (on average 3.0833333333333335) internal successors, (74), 25 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 02:03:31,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 02:03:31,596 INFO L93 Difference]: Finished difference Result 302 states and 350 transitions. [2021-11-21 02:03:31,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-21 02:03:31,598 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 3.0833333333333335) internal successors, (74), 25 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-21 02:03:31,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 02:03:31,600 INFO L225 Difference]: With dead ends: 302 [2021-11-21 02:03:31,600 INFO L226 Difference]: Without dead ends: 302 [2021-11-21 02:03:31,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 294 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=175, Invalid=817, Unknown=0, NotChecked=0, Total=992 [2021-11-21 02:03:31,601 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 22 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 02:03:31,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 111 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 64 Unchecked, 0.4s Time] [2021-11-21 02:03:31,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-11-21 02:03:31,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 257. [2021-11-21 02:03:31,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 254 states have (on average 1.1771653543307086) internal successors, (299), 256 states have internal predecessors, (299), 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) [2021-11-21 02:03:31,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 299 transitions. [2021-11-21 02:03:31,608 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 299 transitions. Word has length 54 [2021-11-21 02:03:31,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 02:03:31,608 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 299 transitions. [2021-11-21 02:03:31,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 3.0833333333333335) internal successors, (74), 25 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 02:03:31,609 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 299 transitions. [2021-11-21 02:03:31,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-21 02:03:31,609 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 02:03:31,610 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 02:03:31,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2021-11-21 02:03:31,812 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (71)] Forceful destruction successful, exit code 0 [2021-11-21 02:03:32,017 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (70)] Forceful destruction successful, exit code 0 [2021-11-21 02:03:32,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 02:03:32,210 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-21 02:03:32,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 02:03:32,211 INFO L85 PathProgramCache]: Analyzing trace with hash -553725830, now seen corresponding path program 1 times [2021-11-21 02:03:32,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 02:03:32,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [592716196] [2021-11-21 02:03:32,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 02:03:32,212 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 02:03:32,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 02:03:32,212 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 02:03:32,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (73)] Waiting until timeout for monitored process [2021-11-21 02:03:32,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 02:03:32,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-21 02:03:32,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 02:03:32,470 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 17 proven. 45 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 02:03:32,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 02:03:32,710 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 17 proven. 45 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 02:03:32,711 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 02:03:32,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [592716196] [2021-11-21 02:03:32,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [592716196] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 02:03:32,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [928027558] [2021-11-21 02:03:32,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 02:03:32,711 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 02:03:32,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 02:03:32,712 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 02:03:32,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (74)] Waiting until timeout for monitored process [2021-11-21 02:03:32,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 02:03:32,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-21 02:03:32,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 02:03:33,603 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 40 proven. 27 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-21 02:03:33,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 02:03:34,261 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 40 proven. 27 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-21 02:03:34,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [928027558] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 02:03:34,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434513187] [2021-11-21 02:03:34,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 02:03:34,262 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 02:03:34,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 02:03:34,281 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 02:03:34,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-11-21 02:03:34,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 02:03:34,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-21 02:03:34,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 02:03:34,826 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 17 proven. 45 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 02:03:34,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 02:03:35,118 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 46 proven. 4 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-21 02:03:35,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434513187] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 02:03:35,119 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 02:03:35,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 11, 10, 12, 9] total 38 [2021-11-21 02:03:35,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039479402] [2021-11-21 02:03:35,119 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 02:03:35,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-21 02:03:35,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 02:03:35,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-21 02:03:35,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1200, Unknown=0, NotChecked=0, Total=1406 [2021-11-21 02:03:35,121 INFO L87 Difference]: Start difference. First operand 257 states and 299 transitions. Second operand has 38 states, 38 states have (on average 5.578947368421052) internal successors, (212), 38 states have internal predecessors, (212), 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) [2021-11-21 02:03:39,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 02:03:39,545 INFO L93 Difference]: Finished difference Result 391 states and 433 transitions. [2021-11-21 02:03:39,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-11-21 02:03:39,546 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.578947368421052) internal successors, (212), 38 states have internal predecessors, (212), 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 58 [2021-11-21 02:03:39,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 02:03:39,547 INFO L225 Difference]: With dead ends: 391 [2021-11-21 02:03:39,547 INFO L226 Difference]: Without dead ends: 384 [2021-11-21 02:03:39,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 334 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1826 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1210, Invalid=5596, Unknown=0, NotChecked=0, Total=6806 [2021-11-21 02:03:39,550 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 1478 mSDsluCounter, 554 mSDsCounter, 0 mSdLazyCounter, 1383 mSolverCounterSat, 265 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1478 SdHoareTripleChecker+Valid, 583 SdHoareTripleChecker+Invalid, 1648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 265 IncrementalHoareTripleChecker+Valid, 1383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-21 02:03:39,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1478 Valid, 583 Invalid, 1648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [265 Valid, 1383 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-11-21 02:03:39,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2021-11-21 02:03:39,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 292. [2021-11-21 02:03:39,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 290 states have (on average 1.1379310344827587) internal successors, (330), 291 states have internal predecessors, (330), 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) [2021-11-21 02:03:39,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 330 transitions. [2021-11-21 02:03:39,558 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 330 transitions. Word has length 58 [2021-11-21 02:03:39,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 02:03:39,559 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 330 transitions. [2021-11-21 02:03:39,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 5.578947368421052) internal successors, (212), 38 states have internal predecessors, (212), 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) [2021-11-21 02:03:39,559 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 330 transitions. [2021-11-21 02:03:39,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-21 02:03:39,560 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 02:03:39,560 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 02:03:39,587 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (73)] Ended with exit code 0 [2021-11-21 02:03:39,779 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (74)] Forceful destruction successful, exit code 0 [2021-11-21 02:03:39,997 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2021-11-21 02:03:40,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 02:03:40,175 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-21 02:03:40,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 02:03:40,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1833407633, now seen corresponding path program 2 times [2021-11-21 02:03:40,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 02:03:40,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1874928797] [2021-11-21 02:03:40,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 02:03:40,176 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 02:03:40,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 02:03:40,177 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 02:03:40,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (76)] Waiting until timeout for monitored process [2021-11-21 02:03:40,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 02:03:40,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 02:03:40,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-21 02:03:40,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 02:03:40,429 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 28 proven. 28 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-21 02:03:40,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 02:03:40,707 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 28 proven. 28 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-21 02:03:40,707 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 02:03:40,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1874928797] [2021-11-21 02:03:40,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1874928797] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 02:03:40,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1979841525] [2021-11-21 02:03:40,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 02:03:40,708 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 02:03:40,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 02:03:40,710 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 02:03:40,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (77)] Waiting until timeout for monitored process [2021-11-21 02:03:40,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 02:03:40,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 02:03:40,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-21 02:03:40,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 02:03:40,891 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 8 treesize of output 7 [2021-11-21 02:03:41,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 25 treesize of output 21 [2021-11-21 02:03:41,724 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 28 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 02:03:41,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 02:03:42,491 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 28 proven. 28 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-21 02:03:42,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1979841525] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 02:03:42,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826256024] [2021-11-21 02:03:42,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 02:03:42,492 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 02:03:42,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 02:03:42,492 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 02:03:42,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-11-21 02:03:42,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 02:03:42,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 02:03:42,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-21 02:03:42,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 02:03:42,591 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 13 treesize of output 12 [2021-11-21 02:03:44,352 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 28 proven. 28 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-21 02:03:44,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 02:03:45,926 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 16 proven. 41 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 02:03:45,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826256024] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 02:03:45,926 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 02:03:45,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 15, 9, 11, 9] total 38 [2021-11-21 02:03:45,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944119860] [2021-11-21 02:03:45,927 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 02:03:45,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-21 02:03:45,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 02:03:45,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-21 02:03:45,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1237, Unknown=0, NotChecked=0, Total=1406 [2021-11-21 02:03:45,930 INFO L87 Difference]: Start difference. First operand 292 states and 330 transitions. Second operand has 38 states, 38 states have (on average 5.421052631578948) internal successors, (206), 38 states have internal predecessors, (206), 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) [2021-11-21 02:03:47,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 02:03:47,506 INFO L93 Difference]: Finished difference Result 354 states and 393 transitions. [2021-11-21 02:03:47,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-21 02:03:47,508 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.421052631578948) internal successors, (206), 38 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-21 02:03:47,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 02:03:47,509 INFO L225 Difference]: With dead ends: 354 [2021-11-21 02:03:47,509 INFO L226 Difference]: Without dead ends: 329 [2021-11-21 02:03:47,509 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 325 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=224, Invalid=1668, Unknown=0, NotChecked=0, Total=1892 [2021-11-21 02:03:47,510 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 67 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 504 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 303 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-21 02:03:47,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 504 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 411 Invalid, 0 Unknown, 303 Unchecked, 1.0s Time] [2021-11-21 02:03:47,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-11-21 02:03:47,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 317. [2021-11-21 02:03:47,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 315 states have (on average 1.1301587301587301) internal successors, (356), 316 states have internal predecessors, (356), 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) [2021-11-21 02:03:47,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 356 transitions. [2021-11-21 02:03:47,517 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 356 transitions. Word has length 61 [2021-11-21 02:03:47,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 02:03:47,517 INFO L470 AbstractCegarLoop]: Abstraction has 317 states and 356 transitions. [2021-11-21 02:03:47,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 5.421052631578948) internal successors, (206), 38 states have internal predecessors, (206), 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) [2021-11-21 02:03:47,518 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 356 transitions. [2021-11-21 02:03:47,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-21 02:03:47,519 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 02:03:47,519 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 1, 1, 1, 1, 1] [2021-11-21 02:03:47,526 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (77)] Forceful destruction successful, exit code 0 [2021-11-21 02:03:47,749 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2021-11-21 02:03:47,934 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (76)] Forceful destruction successful, exit code 0 [2021-11-21 02:03:48,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 02:03:48,126 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-21 02:03:48,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 02:03:48,126 INFO L85 PathProgramCache]: Analyzing trace with hash 58542645, now seen corresponding path program 4 times [2021-11-21 02:03:48,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 02:03:48,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1107555178] [2021-11-21 02:03:48,127 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 02:03:48,127 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 02:03:48,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 02:03:48,128 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 02:03:48,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (79)] Waiting until timeout for monitored process [2021-11-21 02:03:48,206 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 02:03:48,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 02:03:48,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-21 02:03:48,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 02:03:48,229 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 8 treesize of output 7 [2021-11-21 02:03:50,250 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 02:03:50,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 02:04:01,345 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 02:04:01,345 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 02:04:01,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1107555178] [2021-11-21 02:04:01,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1107555178] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 02:04:01,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1227931296] [2021-11-21 02:04:01,345 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 02:04:01,346 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 02:04:01,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 02:04:01,346 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 02:04:01,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (80)] Waiting until timeout for monitored process [2021-11-21 02:04:01,510 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 02:04:01,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 02:04:01,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-21 02:04:01,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 02:04:01,545 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 8 treesize of output 7 [2021-11-21 02:04:03,134 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 02:04:03,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 02:04:13,239 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 02:04:13,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1227931296] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 02:04:13,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524070837] [2021-11-21 02:04:13,240 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 02:04:13,240 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 02:04:13,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 02:04:13,243 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 02:04:13,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-11-21 02:04:13,325 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 02:04:13,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 02:04:13,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-21 02:04:13,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 02:04:13,348 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 8 treesize of output 7 [2021-11-21 02:04:16,347 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 02:04:16,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 02:04:37,897 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 02:04:37,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524070837] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 02:04:37,898 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 02:04:37,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 19, 19, 26, 26] total 105 [2021-11-21 02:04:37,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521002168] [2021-11-21 02:04:37,898 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 02:04:37,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2021-11-21 02:04:37,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 02:04:37,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2021-11-21 02:04:37,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2920, Invalid=8210, Unknown=0, NotChecked=0, Total=11130 [2021-11-21 02:04:37,905 INFO L87 Difference]: Start difference. First operand 317 states and 356 transitions. Second operand has 106 states, 105 states have (on average 3.104761904761905) internal successors, (326), 106 states have internal predecessors, (326), 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) [2021-11-21 02:04:51,190 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:04:53,193 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:04:55,196 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:04:57,198 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:04:59,316 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:05:01,318 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:05:03,321 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:05:05,323 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:05:10,988 WARN L227 SmtUtils]: Spent 5.26s on a formula simplification that was a NOOP. DAG size: 154 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 02:05:22,752 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:05:24,754 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:05:26,757 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:05:28,760 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:05:30,827 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:05:32,858 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:05:34,861 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:05:36,886 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:05:42,572 WARN L227 SmtUtils]: Spent 5.24s on a formula simplification that was a NOOP. DAG size: 144 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 02:05:54,955 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:05:56,958 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:05:58,960 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:06:01,031 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:06:03,131 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:06:05,139 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:06:07,142 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:06:23,081 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:06:25,084 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:06:27,114 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:06:29,116 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:06:31,119 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:06:33,121 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:06:35,124 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:06:45,353 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:06:47,356 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:06:49,359 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:06:51,406 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:06:53,409 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:06:55,444 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:07:04,230 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:07:06,232 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:07:08,235 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:07:10,239 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:07:12,242 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:07:14,298 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:07:22,854 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:07:24,886 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:07:26,597 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:07:28,575 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:07:30,612 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:07:38,160 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:07:40,163 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:07:42,212 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:07:44,258 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:07:50,597 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:07:52,601 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:07:54,603 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:08:00,045 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:08:02,048 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:08:04,051 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:08:09,184 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:08:10,787 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:08:15,032 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:08:24,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 02:08:24,397 INFO L93 Difference]: Finished difference Result 5556 states and 6260 transitions. [2021-11-21 02:08:24,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-11-21 02:08:24,399 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 105 states have (on average 3.104761904761905) internal successors, (326), 106 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-21 02:08:24,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 02:08:24,426 INFO L225 Difference]: With dead ends: 5556 [2021-11-21 02:08:24,426 INFO L226 Difference]: Without dead ends: 5556 [2021-11-21 02:08:24,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 301 SyntacticMatches, 1 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9015 ImplicationChecksByTransitivity, 128.1s TimeCoverageRelationStatistics Valid=5949, Invalid=15221, Unknown=0, NotChecked=0, Total=21170 [2021-11-21 02:08:24,427 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 8326 mSDsluCounter, 4733 mSDsCounter, 0 mSdLazyCounter, 4470 mSolverCounterSat, 212 mSolverCounterUnsat, 52 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 132.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8326 SdHoareTripleChecker+Valid, 4895 SdHoareTripleChecker+Invalid, 4919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 4470 IncrementalHoareTripleChecker+Invalid, 52 IncrementalHoareTripleChecker+Unknown, 185 IncrementalHoareTripleChecker+Unchecked, 133.5s IncrementalHoareTripleChecker+Time [2021-11-21 02:08:24,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8326 Valid, 4895 Invalid, 4919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 4470 Invalid, 52 Unknown, 185 Unchecked, 133.5s Time] [2021-11-21 02:08:24,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5556 states. [2021-11-21 02:08:24,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5556 to 381. [2021-11-21 02:08:24,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 379 states have (on average 1.150395778364116) internal successors, (436), 380 states have internal predecessors, (436), 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) [2021-11-21 02:08:24,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 436 transitions. [2021-11-21 02:08:24,496 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 436 transitions. Word has length 66 [2021-11-21 02:08:24,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 02:08:24,496 INFO L470 AbstractCegarLoop]: Abstraction has 381 states and 436 transitions. [2021-11-21 02:08:24,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 105 states have (on average 3.104761904761905) internal successors, (326), 106 states have internal predecessors, (326), 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) [2021-11-21 02:08:24,497 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 436 transitions. [2021-11-21 02:08:24,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-21 02:08:24,498 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 02:08:24,498 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 02:08:24,504 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (80)] Forceful destruction successful, exit code 0 [2021-11-21 02:08:24,708 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (79)] Forceful destruction successful, exit code 0 [2021-11-21 02:08:24,922 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2021-11-21 02:08:25,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 02:08:25,101 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-21 02:08:25,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 02:08:25,101 INFO L85 PathProgramCache]: Analyzing trace with hash 22158437, now seen corresponding path program 3 times [2021-11-21 02:08:25,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 02:08:25,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1887378956] [2021-11-21 02:08:25,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 02:08:25,102 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 02:08:25,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 02:08:25,103 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 02:08:25,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (82)] Waiting until timeout for monitored process [2021-11-21 02:08:25,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-21 02:08:25,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 02:08:25,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-21 02:08:25,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 02:08:25,263 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 8 treesize of output 7 [2021-11-21 02:08:26,728 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-21 02:08:26,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 02:08:32,882 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-21 02:08:32,882 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 02:08:32,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1887378956] [2021-11-21 02:08:32,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1887378956] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 02:08:32,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [99992096] [2021-11-21 02:08:32,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 02:08:32,883 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 02:08:32,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 02:08:32,883 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 02:08:32,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (83)] Waiting until timeout for monitored process [2021-11-21 02:08:33,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-21 02:08:33,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 02:08:33,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-21 02:08:33,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 02:08:33,090 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 13 treesize of output 12 [2021-11-21 02:08:36,643 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-21 02:08:36,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 02:08:39,241 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-21 02:08:39,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [99992096] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 02:08:39,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981597701] [2021-11-21 02:08:39,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 02:08:39,242 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 02:08:39,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 02:08:39,242 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 02:08:39,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-11-21 02:08:39,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-21 02:08:39,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 02:08:39,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-21 02:08:39,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 02:08:39,670 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 13 treesize of output 12 [2021-11-21 02:08:40,751 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-21 02:08:40,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 02:08:50,038 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-21 02:08:50,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981597701] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 02:08:50,038 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 02:08:50,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 10, 9, 10, 10] total 44 [2021-11-21 02:08:50,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6895905] [2021-11-21 02:08:50,039 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 02:08:50,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-21 02:08:50,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 02:08:50,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-21 02:08:50,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=1716, Unknown=0, NotChecked=0, Total=1980 [2021-11-21 02:08:50,040 INFO L87 Difference]: Start difference. First operand 381 states and 436 transitions. Second operand has 45 states, 44 states have (on average 5.2727272727272725) internal successors, (232), 45 states have internal predecessors, (232), 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) [2021-11-21 02:09:32,730 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 02:10:23,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 02:10:23,166 INFO L93 Difference]: Finished difference Result 751 states and 850 transitions. [2021-11-21 02:10:23,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-11-21 02:10:23,168 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 5.2727272727272725) internal successors, (232), 45 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-21 02:10:23,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 02:10:23,171 INFO L225 Difference]: With dead ends: 751 [2021-11-21 02:10:23,171 INFO L226 Difference]: Without dead ends: 751 [2021-11-21 02:10:23,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 354 SyntacticMatches, 7 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5346 ImplicationChecksByTransitivity, 84.0s TimeCoverageRelationStatistics Valid=1995, Invalid=13257, Unknown=0, NotChecked=0, Total=15252 [2021-11-21 02:10:23,173 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 718 mSDsluCounter, 831 mSDsCounter, 0 mSdLazyCounter, 1216 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 718 SdHoareTripleChecker+Valid, 880 SdHoareTripleChecker+Invalid, 1729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 1216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 360 IncrementalHoareTripleChecker+Unchecked, 20.7s IncrementalHoareTripleChecker+Time [2021-11-21 02:10:23,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [718 Valid, 880 Invalid, 1729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 1216 Invalid, 0 Unknown, 360 Unchecked, 20.7s Time] [2021-11-21 02:10:23,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2021-11-21 02:10:23,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 574. [2021-11-21 02:10:23,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 572 states have (on average 1.1503496503496504) internal successors, (658), 573 states have internal predecessors, (658), 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) [2021-11-21 02:10:23,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 658 transitions. [2021-11-21 02:10:23,192 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 658 transitions. Word has length 66 [2021-11-21 02:10:23,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 02:10:23,193 INFO L470 AbstractCegarLoop]: Abstraction has 574 states and 658 transitions. [2021-11-21 02:10:23,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 5.2727272727272725) internal successors, (232), 45 states have internal predecessors, (232), 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) [2021-11-21 02:10:23,193 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 658 transitions. [2021-11-21 02:10:23,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-21 02:10:23,194 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 02:10:23,195 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 02:10:23,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (82)] Forceful destruction successful, exit code 0 [2021-11-21 02:10:23,429 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2021-11-21 02:10:23,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e205c41-c3f1-472a-beb3-09afb33d1e71/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (83)] Forceful destruction successful, exit code 0