./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/array02-alloca-2.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_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/array02-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6376f52a263bde0c709cb35a0d040626ae764c5527f8161f54a95df7802768d2 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 06:42:38,427 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 06:42:38,429 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 06:42:38,460 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 06:42:38,461 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 06:42:38,462 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 06:42:38,464 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 06:42:38,466 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 06:42:38,468 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 06:42:38,469 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 06:42:38,470 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 06:42:38,472 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 06:42:38,472 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 06:42:38,473 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 06:42:38,475 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 06:42:38,477 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 06:42:38,478 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 06:42:38,479 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 06:42:38,481 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 06:42:38,483 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 06:42:38,485 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 06:42:38,487 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 06:42:38,488 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 06:42:38,489 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 06:42:38,492 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 06:42:38,493 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 06:42:38,493 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 06:42:38,494 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 06:42:38,495 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 06:42:38,496 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 06:42:38,497 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 06:42:38,497 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 06:42:38,498 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 06:42:38,499 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 06:42:38,501 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 06:42:38,501 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 06:42:38,502 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 06:42:38,502 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 06:42:38,503 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 06:42:38,504 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 06:42:38,505 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 06:42:38,505 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-20 06:42:38,531 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 06:42:38,532 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 06:42:38,532 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 06:42:38,532 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 06:42:38,533 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 06:42:38,533 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 06:42:38,534 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 06:42:38,534 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 06:42:38,534 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 06:42:38,535 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 06:42:38,535 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 06:42:38,535 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-20 06:42:38,535 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 06:42:38,535 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 06:42:38,535 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 06:42:38,536 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-20 06:42:38,536 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-20 06:42:38,536 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-20 06:42:38,536 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 06:42:38,536 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-20 06:42:38,537 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 06:42:38,537 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 06:42:38,537 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 06:42:38,537 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 06:42:38,537 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 06:42:38,538 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:42:38,538 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 06:42:38,538 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 06:42:38,538 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 06:42:38,538 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 06:42:38,539 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 06:42:38,539 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6376f52a263bde0c709cb35a0d040626ae764c5527f8161f54a95df7802768d2 [2021-11-20 06:42:38,801 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 06:42:38,831 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 06:42:38,834 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 06:42:38,836 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 06:42:38,836 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 06:42:38,838 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/array-memsafety/array02-alloca-2.i [2021-11-20 06:42:38,900 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/data/f97a457f5/70b416c5ffea455faea53ff81de9768d/FLAG1e9d72d27 [2021-11-20 06:42:39,396 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 06:42:39,405 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/sv-benchmarks/c/array-memsafety/array02-alloca-2.i [2021-11-20 06:42:39,438 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/data/f97a457f5/70b416c5ffea455faea53ff81de9768d/FLAG1e9d72d27 [2021-11-20 06:42:39,730 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/data/f97a457f5/70b416c5ffea455faea53ff81de9768d [2021-11-20 06:42:39,732 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 06:42:39,734 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 06:42:39,736 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 06:42:39,736 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 06:42:39,740 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 06:42:39,740 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:42:39" (1/1) ... [2021-11-20 06:42:39,742 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45e34b7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:42:39, skipping insertion in model container [2021-11-20 06:42:39,742 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:42:39" (1/1) ... [2021-11-20 06:42:39,749 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 06:42:39,791 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:42:40,123 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:42:40,132 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) [2021-11-20 06:42:40,133 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@30a91049 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:42:40, skipping insertion in model container [2021-11-20 06:42:40,133 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 06:42:40,134 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-20 06:42:40,136 INFO L158 Benchmark]: Toolchain (without parser) took 400.90ms. Allocated memory is still 102.8MB. Free memory was 61.3MB in the beginning and 76.7MB in the end (delta: -15.4MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-20 06:42:40,137 INFO L158 Benchmark]: CDTParser took 0.27ms. Allocated memory is still 102.8MB. Free memory was 78.8MB in the beginning and 78.8MB in the end (delta: 84.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 06:42:40,138 INFO L158 Benchmark]: CACSL2BoogieTranslator took 397.70ms. Allocated memory is still 102.8MB. Free memory was 61.1MB in the beginning and 76.7MB in the end (delta: -15.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-20 06:42:40,142 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27ms. Allocated memory is still 102.8MB. Free memory was 78.8MB in the beginning and 78.8MB in the end (delta: 84.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 397.70ms. Allocated memory is still 102.8MB. Free memory was 61.1MB in the beginning and 76.7MB in the end (delta: -15.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 533]: 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_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/array02-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6376f52a263bde0c709cb35a0d040626ae764c5527f8161f54a95df7802768d2 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 06:42:42,432 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 06:42:42,434 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 06:42:42,489 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 06:42:42,489 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 06:42:42,494 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 06:42:42,496 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 06:42:42,502 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 06:42:42,505 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 06:42:42,511 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 06:42:42,512 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 06:42:42,514 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 06:42:42,515 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 06:42:42,517 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 06:42:42,519 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 06:42:42,524 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 06:42:42,526 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 06:42:42,527 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 06:42:42,529 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 06:42:42,539 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 06:42:42,542 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 06:42:42,543 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 06:42:42,546 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 06:42:42,548 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 06:42:42,558 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 06:42:42,558 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 06:42:42,559 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 06:42:42,561 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 06:42:42,562 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 06:42:42,563 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 06:42:42,563 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 06:42:42,564 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 06:42:42,566 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 06:42:42,567 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 06:42:42,568 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 06:42:42,569 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 06:42:42,570 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 06:42:42,570 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 06:42:42,570 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 06:42:42,572 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 06:42:42,573 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 06:42:42,578 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-11-20 06:42:42,624 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 06:42:42,624 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 06:42:42,625 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 06:42:42,625 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 06:42:42,626 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 06:42:42,627 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 06:42:42,628 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 06:42:42,628 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 06:42:42,629 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 06:42:42,629 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 06:42:42,630 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 06:42:42,630 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-20 06:42:42,631 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 06:42:42,631 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 06:42:42,631 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 06:42:42,631 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-20 06:42:42,632 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-20 06:42:42,632 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-20 06:42:42,632 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 06:42:42,632 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-20 06:42:42,632 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-20 06:42:42,633 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-20 06:42:42,633 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 06:42:42,633 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 06:42:42,633 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 06:42:42,634 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 06:42:42,634 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 06:42:42,634 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:42:42,635 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 06:42:42,635 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 06:42:42,635 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-20 06:42:42,635 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-20 06:42:42,636 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 06:42:42,636 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 06:42:42,636 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_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6376f52a263bde0c709cb35a0d040626ae764c5527f8161f54a95df7802768d2 [2021-11-20 06:42:43,031 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 06:42:43,052 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 06:42:43,055 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 06:42:43,056 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 06:42:43,057 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 06:42:43,058 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/array-memsafety/array02-alloca-2.i [2021-11-20 06:42:43,137 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/data/9a3993200/46b5421c59654b2a8494a77a2dd13a7f/FLAG1eec53c2f [2021-11-20 06:42:43,792 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 06:42:43,797 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/sv-benchmarks/c/array-memsafety/array02-alloca-2.i [2021-11-20 06:42:43,816 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/data/9a3993200/46b5421c59654b2a8494a77a2dd13a7f/FLAG1eec53c2f [2021-11-20 06:42:44,069 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/data/9a3993200/46b5421c59654b2a8494a77a2dd13a7f [2021-11-20 06:42:44,071 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 06:42:44,073 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 06:42:44,074 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 06:42:44,075 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 06:42:44,078 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 06:42:44,079 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:42:44" (1/1) ... [2021-11-20 06:42:44,080 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45341f50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:42:44, skipping insertion in model container [2021-11-20 06:42:44,081 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:42:44" (1/1) ... [2021-11-20 06:42:44,087 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 06:42:44,136 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:42:44,533 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:42:44,543 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-20 06:42:44,550 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:42:44,598 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:42:44,612 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 06:42:44,664 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:42:44,696 INFO L208 MainTranslator]: Completed translation [2021-11-20 06:42:44,697 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:42:44 WrapperNode [2021-11-20 06:42:44,697 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 06:42:44,698 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 06:42:44,698 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 06:42:44,699 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 06:42:44,706 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:42:44" (1/1) ... [2021-11-20 06:42:44,725 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:42:44" (1/1) ... [2021-11-20 06:42:44,747 INFO L137 Inliner]: procedures = 117, calls = 12, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 68 [2021-11-20 06:42:44,751 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 06:42:44,752 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 06:42:44,752 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 06:42:44,753 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 06:42:44,759 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:42:44" (1/1) ... [2021-11-20 06:42:44,759 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:42:44" (1/1) ... [2021-11-20 06:42:44,765 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:42:44" (1/1) ... [2021-11-20 06:42:44,765 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:42:44" (1/1) ... [2021-11-20 06:42:44,774 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:42:44" (1/1) ... [2021-11-20 06:42:44,779 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:42:44" (1/1) ... [2021-11-20 06:42:44,781 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:42:44" (1/1) ... [2021-11-20 06:42:44,784 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 06:42:44,785 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 06:42:44,785 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 06:42:44,786 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 06:42:44,786 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:42:44" (1/1) ... [2021-11-20 06:42:44,794 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:42:44,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:42:44,819 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 06:42:44,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 06:42:44,890 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-20 06:42:44,890 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 06:42:44,890 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 06:42:44,890 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-20 06:42:44,891 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 06:42:44,891 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 06:42:44,983 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 06:42:44,986 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 06:42:45,434 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 06:42:45,442 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 06:42:45,443 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-20 06:42:45,444 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:42:45 BoogieIcfgContainer [2021-11-20 06:42:45,445 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 06:42:45,447 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 06:42:45,447 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 06:42:45,450 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 06:42:45,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:42:44" (1/3) ... [2021-11-20 06:42:45,457 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46f238db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:42:45, skipping insertion in model container [2021-11-20 06:42:45,457 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:42:44" (2/3) ... [2021-11-20 06:42:45,458 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46f238db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:42:45, skipping insertion in model container [2021-11-20 06:42:45,458 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:42:45" (3/3) ... [2021-11-20 06:42:45,459 INFO L111 eAbstractionObserver]: Analyzing ICFG array02-alloca-2.i [2021-11-20 06:42:45,465 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 06:42:45,467 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2021-11-20 06:42:45,530 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 06:42:45,539 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 [2021-11-20 06:42:45,540 INFO L340 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2021-11-20 06:42:45,573 INFO L276 IsEmpty]: Start isEmpty. Operand has 42 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 41 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:42:45,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-20 06:42:45,579 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:42:45,588 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-20 06:42:45,588 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-20 06:42:45,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:42:45,594 INFO L85 PathProgramCache]: Analyzing trace with hash 889508873, now seen corresponding path program 1 times [2021-11-20 06:42:45,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:42:45,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [630814405] [2021-11-20 06:42:45,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:42:45,608 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:42:45,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:42:45,615 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:42:45,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-20 06:42:45,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:42:45,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:42:45,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:42:45,811 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 [2021-11-20 06:42:45,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:42:45,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:42:45,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:42:45,873 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:42:45,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [630814405] [2021-11-20 06:42:45,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [630814405] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:42:45,874 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:42:45,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-20 06:42:45,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468464753] [2021-11-20 06:42:45,878 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:42:45,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:42:45,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:42:45,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:42:45,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:42:45,920 INFO L87 Difference]: Start difference. First operand has 42 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 41 states have internal predecessors, (50), 0 states have call successors, (0), 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) [2021-11-20 06:42:46,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:42:46,072 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2021-11-20 06:42:46,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:42:46,075 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 [2021-11-20 06:42:46,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:42:46,083 INFO L225 Difference]: With dead ends: 41 [2021-11-20 06:42:46,084 INFO L226 Difference]: Without dead ends: 39 [2021-11-20 06:42:46,085 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 [2021-11-20 06:42:46,091 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 35 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:42:46,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 32 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:42:46,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-11-20 06:42:46,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-11-20 06:42:46,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 25 states have (on average 1.72) internal successors, (43), 38 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:42:46,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2021-11-20 06:42:46,133 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 6 [2021-11-20 06:42:46,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:42:46,134 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2021-11-20 06:42:46,134 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) [2021-11-20 06:42:46,134 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2021-11-20 06:42:46,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-20 06:42:46,135 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:42:46,135 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-20 06:42:46,152 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-20 06:42:46,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:42:46,347 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-20 06:42:46,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:42:46,350 INFO L85 PathProgramCache]: Analyzing trace with hash 889508874, now seen corresponding path program 1 times [2021-11-20 06:42:46,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:42:46,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [692567319] [2021-11-20 06:42:46,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:42:46,351 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:42:46,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:42:46,353 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:42:46,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-20 06:42:46,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:42:46,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 06:42:46,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:42:46,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 06:42:46,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:42:46,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:42:46,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:42:46,752 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:42:46,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [692567319] [2021-11-20 06:42:46,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [692567319] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:42:46,753 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:42:46,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-20 06:42:46,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603865787] [2021-11-20 06:42:46,753 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:42:46,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:42:46,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:42:46,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:42:46,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:42:46,756 INFO L87 Difference]: Start difference. First operand 39 states and 43 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) [2021-11-20 06:42:47,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:42:47,652 INFO L93 Difference]: Finished difference Result 111 states and 121 transitions. [2021-11-20 06:42:47,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:42:47,654 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 [2021-11-20 06:42:47,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:42:47,656 INFO L225 Difference]: With dead ends: 111 [2021-11-20 06:42:47,656 INFO L226 Difference]: Without dead ends: 111 [2021-11-20 06:42:47,656 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 [2021-11-20 06:42:47,658 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 153 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 06:42:47,658 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 122 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-20 06:42:47,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-11-20 06:42:47,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 43. [2021-11-20 06:42:47,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 42 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:42:47,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2021-11-20 06:42:47,667 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 6 [2021-11-20 06:42:47,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:42:47,668 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2021-11-20 06:42:47,668 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) [2021-11-20 06:42:47,668 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2021-11-20 06:42:47,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-20 06:42:47,669 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:42:47,669 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:42:47,682 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-20 06:42:47,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:42:47,880 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-20 06:42:47,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:42:47,880 INFO L85 PathProgramCache]: Analyzing trace with hash 176742583, now seen corresponding path program 1 times [2021-11-20 06:42:47,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:42:47,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [465604469] [2021-11-20 06:42:47,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:42:47,882 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:42:47,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:42:47,883 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:42:47,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-20 06:42:47,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:42:47,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 06:42:47,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:42:47,978 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 [2021-11-20 06:42:48,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:42:48,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:42:48,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:42:48,056 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:42:48,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [465604469] [2021-11-20 06:42:48,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [465604469] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:42:48,057 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:42:48,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-20 06:42:48,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126822949] [2021-11-20 06:42:48,058 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:42:48,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:42:48,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:42:48,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:42:48,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:42:48,060 INFO L87 Difference]: Start difference. First operand 43 states and 48 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) [2021-11-20 06:42:48,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:42:48,249 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2021-11-20 06:42:48,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:42:48,250 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 [2021-11-20 06:42:48,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:42:48,251 INFO L225 Difference]: With dead ends: 37 [2021-11-20 06:42:48,251 INFO L226 Difference]: Without dead ends: 37 [2021-11-20 06:42:48,252 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:42:48,253 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 51 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:42:48,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 29 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:42:48,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-20 06:42:48,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-11-20 06:42:48,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 36 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:42:48,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2021-11-20 06:42:48,265 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 8 [2021-11-20 06:42:48,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:42:48,265 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2021-11-20 06:42:48,267 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) [2021-11-20 06:42:48,267 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2021-11-20 06:42:48,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-20 06:42:48,268 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:42:48,268 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:42:48,284 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-20 06:42:48,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:42:48,485 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-20 06:42:48,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:42:48,485 INFO L85 PathProgramCache]: Analyzing trace with hash 176742584, now seen corresponding path program 1 times [2021-11-20 06:42:48,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:42:48,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [813056934] [2021-11-20 06:42:48,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:42:48,486 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:42:48,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:42:48,500 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:42:48,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-20 06:42:48,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:42:48,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-20 06:42:48,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:42:48,615 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 [2021-11-20 06:42:48,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:42:48,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:42:49,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:42:49,102 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:42:49,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [813056934] [2021-11-20 06:42:49,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [813056934] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:42:49,103 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:42:49,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 5] imperfect sequences [] total 8 [2021-11-20 06:42:49,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807378667] [2021-11-20 06:42:49,103 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:42:49,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:42:49,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:42:49,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:42:49,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:42:49,105 INFO L87 Difference]: Start difference. First operand 37 states and 42 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) [2021-11-20 06:42:49,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:42:49,630 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2021-11-20 06:42:49,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:42:49,632 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 [2021-11-20 06:42:49,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:42:49,633 INFO L225 Difference]: With dead ends: 39 [2021-11-20 06:42:49,633 INFO L226 Difference]: Without dead ends: 39 [2021-11-20 06:42:49,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:42:49,635 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 124 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:42:49,635 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 38 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 06:42:49,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-11-20 06:42:49,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2021-11-20 06:42:49,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 31 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:42:49,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2021-11-20 06:42:49,639 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 8 [2021-11-20 06:42:49,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:42:49,640 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2021-11-20 06:42:49,640 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) [2021-11-20 06:42:49,640 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2021-11-20 06:42:49,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-20 06:42:49,642 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:42:49,642 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:42:49,656 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-20 06:42:49,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:42:49,853 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-20 06:42:49,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:42:49,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1091210163, now seen corresponding path program 1 times [2021-11-20 06:42:49,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:42:49,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1685720049] [2021-11-20 06:42:49,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:42:49,854 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:42:49,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:42:49,855 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:42:49,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-20 06:42:49,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:42:49,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 06:42:49,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:42:49,972 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:42:49,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:42:50,036 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:42:50,036 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:42:50,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1685720049] [2021-11-20 06:42:50,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1685720049] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:42:50,037 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:42:50,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-11-20 06:42:50,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563170859] [2021-11-20 06:42:50,037 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:42:50,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:42:50,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:42:50,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:42:50,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:42:50,039 INFO L87 Difference]: Start difference. First operand 32 states and 37 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) [2021-11-20 06:42:50,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:42:50,110 INFO L93 Difference]: Finished difference Result 59 states and 67 transitions. [2021-11-20 06:42:50,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:42:50,115 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 [2021-11-20 06:42:50,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:42:50,116 INFO L225 Difference]: With dead ends: 59 [2021-11-20 06:42:50,116 INFO L226 Difference]: Without dead ends: 59 [2021-11-20 06:42:50,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:42:50,118 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 69 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:42:50,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 121 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:42:50,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-11-20 06:42:50,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 38. [2021-11-20 06:42:50,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 37 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:42:50,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2021-11-20 06:42:50,124 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 10 [2021-11-20 06:42:50,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:42:50,124 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2021-11-20 06:42:50,124 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) [2021-11-20 06:42:50,124 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2021-11-20 06:42:50,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-20 06:42:50,125 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:42:50,125 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:42:50,144 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-20 06:42:50,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:42:50,340 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-20 06:42:50,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:42:50,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1900556789, now seen corresponding path program 1 times [2021-11-20 06:42:50,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:42:50,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1556933743] [2021-11-20 06:42:50,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:42:50,341 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:42:50,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:42:50,347 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:42:50,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-20 06:42:50,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:42:50,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 06:42:50,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:42:50,426 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 [2021-11-20 06:42:50,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:42:50,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:42:51,233 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:42:51,233 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:42:51,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1556933743] [2021-11-20 06:42:51,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1556933743] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:42:51,234 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:42:51,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-11-20 06:42:51,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719975638] [2021-11-20 06:42:51,234 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:42:51,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 06:42:51,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:42:51,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 06:42:51,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:42:51,235 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:42:51,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:42:51,784 INFO L93 Difference]: Finished difference Result 67 states and 77 transitions. [2021-11-20 06:42:51,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 06:42:51,786 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 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 [2021-11-20 06:42:51,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:42:51,786 INFO L225 Difference]: With dead ends: 67 [2021-11-20 06:42:51,786 INFO L226 Difference]: Without dead ends: 67 [2021-11-20 06:42:51,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:42:51,788 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 63 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:42:51,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 114 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 95 Invalid, 0 Unknown, 20 Unchecked, 0.5s Time] [2021-11-20 06:42:51,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-11-20 06:42:51,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 46. [2021-11-20 06:42:51,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 43 states have (on average 1.2325581395348837) internal successors, (53), 45 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:42:51,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2021-11-20 06:42:51,796 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 10 [2021-11-20 06:42:51,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:42:51,797 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2021-11-20 06:42:51,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:42:51,797 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2021-11-20 06:42:51,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-20 06:42:51,798 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:42:51,798 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:42:51,809 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-20 06:42:52,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:42:52,004 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-20 06:42:52,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:42:52,005 INFO L85 PathProgramCache]: Analyzing trace with hash 363893421, now seen corresponding path program 1 times [2021-11-20 06:42:52,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:42:52,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [493633400] [2021-11-20 06:42:52,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:42:52,006 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:42:52,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:42:52,006 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:42:52,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-20 06:42:52,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:42:52,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 06:42:52,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:42:52,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:42:52,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:42:52,147 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:42:52,147 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:42:52,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [493633400] [2021-11-20 06:42:52,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [493633400] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:42:52,147 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:42:52,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-20 06:42:52,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310969898] [2021-11-20 06:42:52,148 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:42:52,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:42:52,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:42:52,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:42:52,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:42:52,149 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 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) [2021-11-20 06:42:52,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:42:52,365 INFO L93 Difference]: Finished difference Result 80 states and 90 transitions. [2021-11-20 06:42:52,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:42:52,366 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 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 13 [2021-11-20 06:42:52,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:42:52,367 INFO L225 Difference]: With dead ends: 80 [2021-11-20 06:42:52,367 INFO L226 Difference]: Without dead ends: 80 [2021-11-20 06:42:52,368 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:42:52,368 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 104 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:42:52,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 62 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:42:52,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-20 06:42:52,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 46. [2021-11-20 06:42:52,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 43 states have (on average 1.2093023255813953) internal successors, (52), 45 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:42:52,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2021-11-20 06:42:52,375 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 13 [2021-11-20 06:42:52,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:42:52,375 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2021-11-20 06:42:52,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 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) [2021-11-20 06:42:52,375 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2021-11-20 06:42:52,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-20 06:42:52,376 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:42:52,376 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:42:52,387 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-20 06:42:52,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:42:52,590 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-20 06:42:52,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:42:52,590 INFO L85 PathProgramCache]: Analyzing trace with hash -2110205631, now seen corresponding path program 1 times [2021-11-20 06:42:52,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:42:52,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1776835815] [2021-11-20 06:42:52,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:42:52,591 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:42:52,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:42:52,592 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:42:52,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-20 06:42:52,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:42:52,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 06:42:52,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:42:52,742 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:42:52,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:42:52,837 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:42:52,837 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:42:52,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1776835815] [2021-11-20 06:42:52,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1776835815] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:42:52,837 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:42:52,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-11-20 06:42:52,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076925768] [2021-11-20 06:42:52,837 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:42:52,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:42:52,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:42:52,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:42:52,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:42:52,838 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:42:53,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:42:53,022 INFO L93 Difference]: Finished difference Result 65 states and 72 transitions. [2021-11-20 06:42:53,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:42:53,024 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 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 [2021-11-20 06:42:53,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:42:53,025 INFO L225 Difference]: With dead ends: 65 [2021-11-20 06:42:53,025 INFO L226 Difference]: Without dead ends: 65 [2021-11-20 06:42:53,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:42:53,026 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 53 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:42:53,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 114 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:42:53,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-11-20 06:42:53,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2021-11-20 06:42:53,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 59 states have (on average 1.1864406779661016) internal successors, (70), 61 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:42:53,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 70 transitions. [2021-11-20 06:42:53,032 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 70 transitions. Word has length 18 [2021-11-20 06:42:53,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:42:53,032 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 70 transitions. [2021-11-20 06:42:53,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:42:53,032 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 70 transitions. [2021-11-20 06:42:53,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-20 06:42:53,033 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:42:53,033 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1] [2021-11-20 06:42:53,044 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-11-20 06:42:53,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:42:53,245 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-20 06:42:53,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:42:53,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1817992175, now seen corresponding path program 2 times [2021-11-20 06:42:53,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:42:53,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1634296017] [2021-11-20 06:42:53,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:42:53,246 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:42:53,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:42:53,247 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:42:53,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-20 06:42:53,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:42:53,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:42:53,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 06:42:53,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:42:53,348 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 [2021-11-20 06:42:53,819 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:42:53,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:42:54,904 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:42:54,905 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:42:54,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1634296017] [2021-11-20 06:42:54,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1634296017] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:42:54,905 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:42:54,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-11-20 06:42:54,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169686707] [2021-11-20 06:42:54,906 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:42:54,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 06:42:54,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:42:54,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 06:42:54,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-11-20 06:42:54,907 INFO L87 Difference]: Start difference. First operand 62 states and 70 transitions. Second operand has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 14 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) [2021-11-20 06:42:57,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:42:57,294 INFO L93 Difference]: Finished difference Result 183 states and 205 transitions. [2021-11-20 06:42:57,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-20 06:42:57,296 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 14 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 18 [2021-11-20 06:42:57,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:42:57,297 INFO L225 Difference]: With dead ends: 183 [2021-11-20 06:42:57,298 INFO L226 Difference]: Without dead ends: 183 [2021-11-20 06:42:57,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2021-11-20 06:42:57,299 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 426 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 426 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:42:57,299 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [426 Valid, 261 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 238 Invalid, 0 Unknown, 15 Unchecked, 1.2s Time] [2021-11-20 06:42:57,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-11-20 06:42:57,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 78. [2021-11-20 06:42:57,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 75 states have (on average 1.2) internal successors, (90), 77 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) [2021-11-20 06:42:57,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 90 transitions. [2021-11-20 06:42:57,308 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 90 transitions. Word has length 18 [2021-11-20 06:42:57,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:42:57,309 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 90 transitions. [2021-11-20 06:42:57,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 14 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) [2021-11-20 06:42:57,309 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 90 transitions. [2021-11-20 06:42:57,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-20 06:42:57,310 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:42:57,311 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:42:57,324 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-11-20 06:42:57,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:42:57,522 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-20 06:42:57,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:42:57,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1163693311, now seen corresponding path program 1 times [2021-11-20 06:42:57,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:42:57,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1380898203] [2021-11-20 06:42:57,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:42:57,523 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:42:57,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:42:57,525 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:42:57,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-20 06:42:57,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:42:57,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-20 06:42:57,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:42:57,623 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 [2021-11-20 06:42:58,000 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:42:58,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:42:58,882 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:42:58,883 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:42:58,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1380898203] [2021-11-20 06:42:58,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1380898203] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:42:58,883 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:42:58,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-11-20 06:42:58,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734545647] [2021-11-20 06:42:58,883 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:42:58,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 06:42:58,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:42:58,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 06:42:58,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-11-20 06:42:58,884 INFO L87 Difference]: Start difference. First operand 78 states and 90 transitions. Second operand has 12 states, 11 states have (on average 3.090909090909091) internal successors, (34), 12 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) [2021-11-20 06:42:59,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:42:59,729 INFO L93 Difference]: Finished difference Result 113 states and 130 transitions. [2021-11-20 06:42:59,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 06:42:59,731 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.090909090909091) internal successors, (34), 12 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 18 [2021-11-20 06:42:59,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:42:59,733 INFO L225 Difference]: With dead ends: 113 [2021-11-20 06:42:59,733 INFO L226 Difference]: Without dead ends: 113 [2021-11-20 06:42:59,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-11-20 06:42:59,734 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 152 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:42:59,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 110 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 99 Invalid, 0 Unknown, 9 Unchecked, 0.5s Time] [2021-11-20 06:42:59,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-11-20 06:42:59,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 106. [2021-11-20 06:42:59,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 103 states have (on average 1.203883495145631) internal successors, (124), 105 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) [2021-11-20 06:42:59,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 124 transitions. [2021-11-20 06:42:59,744 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 124 transitions. Word has length 18 [2021-11-20 06:42:59,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:42:59,744 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 124 transitions. [2021-11-20 06:42:59,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.090909090909091) internal successors, (34), 12 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) [2021-11-20 06:42:59,745 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 124 transitions. [2021-11-20 06:42:59,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-20 06:42:59,746 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:42:59,746 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:42:59,761 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-20 06:42:59,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:42:59,961 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-20 06:42:59,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:42:59,962 INFO L85 PathProgramCache]: Analyzing trace with hash -991865623, now seen corresponding path program 1 times [2021-11-20 06:42:59,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:42:59,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1573650056] [2021-11-20 06:42:59,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:42:59,962 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:42:59,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:42:59,963 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:42:59,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-20 06:43:00,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:00,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 06:43:00,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:43:00,155 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:43:00,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:43:08,333 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:43:08,333 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:43:08,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1573650056] [2021-11-20 06:43:08,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1573650056] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:43:08,334 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:43:08,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-20 06:43:08,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400922595] [2021-11-20 06:43:08,334 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:43:08,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:43:08,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:43:08,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:43:08,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=25, Unknown=2, NotChecked=0, Total=42 [2021-11-20 06:43:08,335 INFO L87 Difference]: Start difference. First operand 106 states and 124 transitions. Second operand has 7 states, 6 states have (on average 6.166666666666667) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:43:08,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:43:08,443 INFO L93 Difference]: Finished difference Result 105 states and 123 transitions. [2021-11-20 06:43:08,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:43:08,445 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.166666666666667) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 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 [2021-11-20 06:43:08,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:43:08,446 INFO L225 Difference]: With dead ends: 105 [2021-11-20 06:43:08,446 INFO L226 Difference]: Without dead ends: 81 [2021-11-20 06:43:08,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=15, Invalid=25, Unknown=2, NotChecked=0, Total=42 [2021-11-20 06:43:08,447 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 13 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:43:08,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 64 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 11 Unchecked, 0.1s Time] [2021-11-20 06:43:08,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-11-20 06:43:08,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-11-20 06:43:08,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 79 states have (on average 1.1898734177215189) internal successors, (94), 80 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:43:08,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 94 transitions. [2021-11-20 06:43:08,455 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 94 transitions. Word has length 19 [2021-11-20 06:43:08,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:43:08,455 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 94 transitions. [2021-11-20 06:43:08,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.166666666666667) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:43:08,456 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 94 transitions. [2021-11-20 06:43:08,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-20 06:43:08,457 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:43:08,457 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:43:08,478 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-20 06:43:08,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:43:08,658 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-20 06:43:08,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:43:08,658 INFO L85 PathProgramCache]: Analyzing trace with hash -2063932537, now seen corresponding path program 2 times [2021-11-20 06:43:08,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:43:08,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [487322376] [2021-11-20 06:43:08,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:43:08,659 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:43:08,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:43:08,660 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:43:08,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-20 06:43:08,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:43:08,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:43:08,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-20 06:43:08,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:43:08,753 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 8 treesize of output 7 [2021-11-20 06:43:09,258 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 06:43:09,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:43:11,539 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:43:11,540 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:43:11,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [487322376] [2021-11-20 06:43:11,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [487322376] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:43:11,540 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:43:11,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 17 [2021-11-20 06:43:11,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435625623] [2021-11-20 06:43:11,541 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:43:11,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-20 06:43:11,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:43:11,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-20 06:43:11,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-11-20 06:43:11,542 INFO L87 Difference]: Start difference. First operand 81 states and 94 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:43:12,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:43:12,184 INFO L93 Difference]: Finished difference Result 98 states and 112 transitions. [2021-11-20 06:43:12,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 06:43:12,188 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-20 06:43:12,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:43:12,190 INFO L225 Difference]: With dead ends: 98 [2021-11-20 06:43:12,190 INFO L226 Difference]: Without dead ends: 95 [2021-11-20 06:43:12,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-11-20 06:43:12,191 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 27 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:43:12,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 138 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 80 Invalid, 0 Unknown, 24 Unchecked, 0.4s Time] [2021-11-20 06:43:12,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-11-20 06:43:12,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 87. [2021-11-20 06:43:12,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 85 states have (on average 1.188235294117647) internal successors, (101), 86 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:43:12,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 101 transitions. [2021-11-20 06:43:12,197 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 101 transitions. Word has length 30 [2021-11-20 06:43:12,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:43:12,198 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 101 transitions. [2021-11-20 06:43:12,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:43:12,198 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 101 transitions. [2021-11-20 06:43:12,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-20 06:43:12,199 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:43:12,200 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1] [2021-11-20 06:43:12,214 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-20 06:43:12,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:43:12,411 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-20 06:43:12,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:43:12,411 INFO L85 PathProgramCache]: Analyzing trace with hash -563143139, now seen corresponding path program 3 times [2021-11-20 06:43:12,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:43:12,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [913485861] [2021-11-20 06:43:12,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:43:12,412 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:43:12,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:43:12,413 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:43:12,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-20 06:43:12,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-20 06:43:12,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:43:12,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-20 06:43:12,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:43:12,592 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 [2021-11-20 06:43:13,376 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:43:13,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:43:15,902 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:43:15,902 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:43:15,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [913485861] [2021-11-20 06:43:15,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [913485861] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:43:15,902 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:43:15,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-11-20 06:43:15,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827225430] [2021-11-20 06:43:15,903 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:43:15,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-20 06:43:15,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:43:15,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-20 06:43:15,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-11-20 06:43:15,904 INFO L87 Difference]: Start difference. First operand 87 states and 101 transitions. Second operand has 22 states, 21 states have (on average 3.142857142857143) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:43:29,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:43:29,082 INFO L93 Difference]: Finished difference Result 715 states and 815 transitions. [2021-11-20 06:43:29,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-20 06:43:29,083 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.142857142857143) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-20 06:43:29,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:43:29,088 INFO L225 Difference]: With dead ends: 715 [2021-11-20 06:43:29,088 INFO L226 Difference]: Without dead ends: 715 [2021-11-20 06:43:29,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=522, Invalid=1200, Unknown=0, NotChecked=0, Total=1722 [2021-11-20 06:43:29,090 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 1252 mSDsluCounter, 650 mSDsCounter, 0 mSdLazyCounter, 817 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1252 SdHoareTripleChecker+Valid, 731 SdHoareTripleChecker+Invalid, 864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 817 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:43:29,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1252 Valid, 731 Invalid, 864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 817 Invalid, 0 Unknown, 17 Unchecked, 4.1s Time] [2021-11-20 06:43:29,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2021-11-20 06:43:29,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 119. [2021-11-20 06:43:29,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 117 states have (on average 1.205128205128205) internal successors, (141), 118 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:43:29,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 141 transitions. [2021-11-20 06:43:29,101 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 141 transitions. Word has length 34 [2021-11-20 06:43:29,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:43:29,101 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 141 transitions. [2021-11-20 06:43:29,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.142857142857143) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:43:29,102 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 141 transitions. [2021-11-20 06:43:29,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-20 06:43:29,103 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:43:29,103 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:43:29,136 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-20 06:43:29,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:43:29,336 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-20 06:43:29,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:43:29,337 INFO L85 PathProgramCache]: Analyzing trace with hash 913185738, now seen corresponding path program 3 times [2021-11-20 06:43:29,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:43:29,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [189402002] [2021-11-20 06:43:29,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:43:29,338 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:43:29,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:43:29,340 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:43:29,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-20 06:43:29,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-20 06:43:29,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:43:29,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-20 06:43:29,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:43:29,518 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 [2021-11-20 06:43:30,228 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:43:30,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:43:32,440 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:43:32,440 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:43:32,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [189402002] [2021-11-20 06:43:32,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [189402002] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:43:32,440 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:43:32,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2021-11-20 06:43:32,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569931417] [2021-11-20 06:43:32,441 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:43:32,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-20 06:43:32,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:43:32,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-20 06:43:32,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2021-11-20 06:43:32,442 INFO L87 Difference]: Start difference. First operand 119 states and 141 transitions. Second operand has 20 states, 20 states have (on average 3.3) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:43:37,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:43:37,897 INFO L93 Difference]: Finished difference Result 195 states and 225 transitions. [2021-11-20 06:43:37,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-20 06:43:37,898 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-20 06:43:37,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:43:37,899 INFO L225 Difference]: With dead ends: 195 [2021-11-20 06:43:37,899 INFO L226 Difference]: Without dead ends: 131 [2021-11-20 06:43:37,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=380, Invalid=1102, Unknown=0, NotChecked=0, Total=1482 [2021-11-20 06:43:37,901 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 643 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 643 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:43:37,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [643 Valid, 309 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-20 06:43:37,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-11-20 06:43:37,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 127. [2021-11-20 06:43:37,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 125 states have (on average 1.184) internal successors, (148), 126 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) [2021-11-20 06:43:37,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 148 transitions. [2021-11-20 06:43:37,907 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 148 transitions. Word has length 34 [2021-11-20 06:43:37,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:43:37,908 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 148 transitions. [2021-11-20 06:43:37,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:43:37,908 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 148 transitions. [2021-11-20 06:43:37,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-20 06:43:37,910 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:43:37,910 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:43:37,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-20 06:43:38,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:43:38,122 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-20 06:43:38,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:43:38,122 INFO L85 PathProgramCache]: Analyzing trace with hash -720923439, now seen corresponding path program 4 times [2021-11-20 06:43:38,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:43:38,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [234418823] [2021-11-20 06:43:38,124 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 06:43:38,124 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:43:38,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:43:38,125 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:43:38,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-20 06:43:38,216 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 06:43:38,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:43:38,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-20 06:43:38,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:43:38,244 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 [2021-11-20 06:43:39,108 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 20 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:43:39,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:43:42,375 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:43:42,375 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:43:42,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [234418823] [2021-11-20 06:43:42,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [234418823] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:43:42,376 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:43:42,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 24 [2021-11-20 06:43:42,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022214414] [2021-11-20 06:43:42,377 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:43:42,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-20 06:43:42,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:43:42,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-20 06:43:42,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-11-20 06:43:42,378 INFO L87 Difference]: Start difference. First operand 127 states and 148 transitions. Second operand has 24 states, 24 states have (on average 3.5833333333333335) internal successors, (86), 24 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:43:43,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:43:43,749 INFO L93 Difference]: Finished difference Result 162 states and 188 transitions. [2021-11-20 06:43:43,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 06:43:43,751 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.5833333333333335) internal successors, (86), 24 states have internal predecessors, (86), 0 states have call successors, (0), 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 [2021-11-20 06:43:43,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:43:43,752 INFO L225 Difference]: With dead ends: 162 [2021-11-20 06:43:43,752 INFO L226 Difference]: Without dead ends: 159 [2021-11-20 06:43:43,753 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2021-11-20 06:43:43,753 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 51 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:43:43,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 328 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 209 Invalid, 0 Unknown, 43 Unchecked, 1.1s Time] [2021-11-20 06:43:43,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-11-20 06:43:43,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 145. [2021-11-20 06:43:43,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 143 states have (on average 1.1958041958041958) internal successors, (171), 144 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:43:43,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 171 transitions. [2021-11-20 06:43:43,758 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 171 transitions. Word has length 44 [2021-11-20 06:43:43,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:43:43,772 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 171 transitions. [2021-11-20 06:43:43,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.5833333333333335) internal successors, (86), 24 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:43:43,773 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 171 transitions. [2021-11-20 06:43:43,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-20 06:43:43,774 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:43:43,775 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:43:43,789 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-20 06:43:43,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:43:43,975 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-20 06:43:43,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:43:43,976 INFO L85 PathProgramCache]: Analyzing trace with hash 82156500, now seen corresponding path program 5 times [2021-11-20 06:43:43,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:43:43,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1681492901] [2021-11-20 06:43:43,976 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 06:43:43,977 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:43:43,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:43:43,978 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:43:43,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-20 06:43:44,101 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-11-20 06:43:44,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:43:44,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-20 06:43:44,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:43:44,132 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 [2021-11-20 06:43:45,303 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:43:45,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:43:49,474 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 10 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:43:49,474 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:43:49,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1681492901] [2021-11-20 06:43:49,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1681492901] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:43:49,474 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:43:49,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2021-11-20 06:43:49,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929174027] [2021-11-20 06:43:49,475 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:43:49,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-20 06:43:49,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:43:49,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-20 06:43:49,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2021-11-20 06:43:49,476 INFO L87 Difference]: Start difference. First operand 145 states and 171 transitions. Second operand has 27 states, 26 states have (on average 3.6153846153846154) internal successors, (94), 27 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:43:53,716 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:44:03,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:44:03,301 INFO L93 Difference]: Finished difference Result 296 states and 343 transitions. [2021-11-20 06:44:03,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-20 06:44:03,303 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.6153846153846154) internal successors, (94), 27 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-11-20 06:44:03,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:44:03,304 INFO L225 Difference]: With dead ends: 296 [2021-11-20 06:44:03,305 INFO L226 Difference]: Without dead ends: 296 [2021-11-20 06:44:03,306 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=605, Invalid=2047, Unknown=0, NotChecked=0, Total=2652 [2021-11-20 06:44:03,306 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 1448 mSDsluCounter, 548 mSDsCounter, 0 mSdLazyCounter, 727 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1448 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:44:03,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1448 Valid, 595 Invalid, 873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 727 Invalid, 0 Unknown, 55 Unchecked, 5.1s Time] [2021-11-20 06:44:03,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-11-20 06:44:03,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 215. [2021-11-20 06:44:03,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 213 states have (on average 1.1784037558685445) internal successors, (251), 214 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:44:03,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 251 transitions. [2021-11-20 06:44:03,313 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 251 transitions. Word has length 48 [2021-11-20 06:44:03,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:44:03,313 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 251 transitions. [2021-11-20 06:44:03,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.6153846153846154) internal successors, (94), 27 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:44:03,314 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 251 transitions. [2021-11-20 06:44:03,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-20 06:44:03,315 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:44:03,316 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:44:03,334 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-20 06:44:03,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:44:03,528 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-20 06:44:03,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:44:03,528 INFO L85 PathProgramCache]: Analyzing trace with hash -265635160, now seen corresponding path program 1 times [2021-11-20 06:44:03,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:44:03,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1197096972] [2021-11-20 06:44:03,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:44:03,529 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:44:03,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:44:03,530 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:44:03,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-20 06:44:03,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:44:03,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-20 06:44:03,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:44:03,645 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 [2021-11-20 06:44:04,602 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 44 proven. 43 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 06:44:04,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:44:08,868 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:44:08,868 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:44:08,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1197096972] [2021-11-20 06:44:08,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1197096972] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:44:08,868 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:44:08,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 25 [2021-11-20 06:44:08,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479827402] [2021-11-20 06:44:08,869 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:44:08,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-20 06:44:08,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:44:08,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-20 06:44:08,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-11-20 06:44:08,870 INFO L87 Difference]: Start difference. First operand 215 states and 251 transitions. Second operand has 25 states, 25 states have (on average 4.12) internal successors, (103), 25 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) [2021-11-20 06:44:10,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:44:10,523 INFO L93 Difference]: Finished difference Result 247 states and 283 transitions. [2021-11-20 06:44:10,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 06:44:10,525 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.12) internal successors, (103), 25 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) Word has length 56 [2021-11-20 06:44:10,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:44:10,528 INFO L225 Difference]: With dead ends: 247 [2021-11-20 06:44:10,528 INFO L226 Difference]: Without dead ends: 236 [2021-11-20 06:44:10,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2021-11-20 06:44:10,529 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 75 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:44:10,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 345 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 215 Invalid, 0 Unknown, 45 Unchecked, 1.3s Time] [2021-11-20 06:44:10,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-11-20 06:44:10,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 213. [2021-11-20 06:44:10,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 211 states have (on average 1.1753554502369667) internal successors, (248), 212 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:44:10,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 248 transitions. [2021-11-20 06:44:10,536 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 248 transitions. Word has length 56 [2021-11-20 06:44:10,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:44:10,537 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 248 transitions. [2021-11-20 06:44:10,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.12) internal successors, (103), 25 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) [2021-11-20 06:44:10,537 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 248 transitions. [2021-11-20 06:44:10,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-20 06:44:10,539 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:44:10,539 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:44:10,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-20 06:44:10,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:44:10,745 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-20 06:44:10,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:44:10,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1427161704, now seen corresponding path program 1 times [2021-11-20 06:44:10,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:44:10,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [484906577] [2021-11-20 06:44:10,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:44:10,746 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:44:10,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:44:10,746 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:44:10,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-20 06:44:10,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:44:10,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-20 06:44:10,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:44:10,872 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 [2021-11-20 06:44:11,737 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 44 proven. 44 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 06:44:11,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:44:16,208 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:44:16,208 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:44:16,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [484906577] [2021-11-20 06:44:16,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [484906577] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:44:16,208 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:44:16,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 25 [2021-11-20 06:44:16,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877789244] [2021-11-20 06:44:16,209 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:44:16,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-20 06:44:16,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:44:16,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-20 06:44:16,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-11-20 06:44:16,210 INFO L87 Difference]: Start difference. First operand 213 states and 248 transitions. Second operand has 25 states, 25 states have (on average 4.12) internal successors, (103), 25 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) [2021-11-20 06:44:17,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:44:17,795 INFO L93 Difference]: Finished difference Result 247 states and 283 transitions. [2021-11-20 06:44:17,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 06:44:17,797 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.12) internal successors, (103), 25 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) Word has length 56 [2021-11-20 06:44:17,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:44:17,798 INFO L225 Difference]: With dead ends: 247 [2021-11-20 06:44:17,798 INFO L226 Difference]: Without dead ends: 244 [2021-11-20 06:44:17,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2021-11-20 06:44:17,799 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 65 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:44:17,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 324 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 221 Invalid, 0 Unknown, 8 Unchecked, 1.2s Time] [2021-11-20 06:44:17,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-11-20 06:44:17,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 221. [2021-11-20 06:44:17,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 219 states have (on average 1.17351598173516) internal successors, (257), 220 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:44:17,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 257 transitions. [2021-11-20 06:44:17,805 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 257 transitions. Word has length 56 [2021-11-20 06:44:17,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:44:17,805 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 257 transitions. [2021-11-20 06:44:17,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.12) internal successors, (103), 25 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) [2021-11-20 06:44:17,806 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 257 transitions. [2021-11-20 06:44:17,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-20 06:44:17,806 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:44:17,807 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:44:17,818 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-11-20 06:44:18,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:44:18,019 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-20 06:44:18,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:44:18,019 INFO L85 PathProgramCache]: Analyzing trace with hash -388791448, now seen corresponding path program 2 times [2021-11-20 06:44:18,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:44:18,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [253064596] [2021-11-20 06:44:18,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:44:18,020 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:44:18,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:44:18,021 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:44:18,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-20 06:44:18,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:44:18,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:44:18,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-20 06:44:18,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:44:18,163 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 [2021-11-20 06:44:19,093 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 44 proven. 43 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 06:44:19,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:44:23,446 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:44:23,446 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:44:23,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [253064596] [2021-11-20 06:44:23,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [253064596] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:44:23,446 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:44:23,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 25 [2021-11-20 06:44:23,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189067895] [2021-11-20 06:44:23,447 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:44:23,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-20 06:44:23,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:44:23,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-20 06:44:23,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-11-20 06:44:23,448 INFO L87 Difference]: Start difference. First operand 221 states and 257 transitions. Second operand has 25 states, 25 states have (on average 4.12) internal successors, (103), 25 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) [2021-11-20 06:44:25,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:44:25,187 INFO L93 Difference]: Finished difference Result 294 states and 339 transitions. [2021-11-20 06:44:25,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-20 06:44:25,189 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.12) internal successors, (103), 25 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) Word has length 56 [2021-11-20 06:44:25,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:44:25,190 INFO L225 Difference]: With dead ends: 294 [2021-11-20 06:44:25,190 INFO L226 Difference]: Without dead ends: 291 [2021-11-20 06:44:25,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=118, Invalid=694, Unknown=0, NotChecked=0, Total=812 [2021-11-20 06:44:25,191 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 69 mSDsluCounter, 511 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:44:25,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 547 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 231 Invalid, 0 Unknown, 68 Unchecked, 1.0s Time] [2021-11-20 06:44:25,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2021-11-20 06:44:25,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 257. [2021-11-20 06:44:25,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 255 states have (on average 1.188235294117647) internal successors, (303), 256 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:44:25,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 303 transitions. [2021-11-20 06:44:25,198 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 303 transitions. Word has length 56 [2021-11-20 06:44:25,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:44:25,199 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 303 transitions. [2021-11-20 06:44:25,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.12) internal successors, (103), 25 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) [2021-11-20 06:44:25,199 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 303 transitions. [2021-11-20 06:44:25,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-20 06:44:25,200 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:44:25,201 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:44:25,213 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-11-20 06:44:25,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:44:25,413 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-20 06:44:25,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:44:25,413 INFO L85 PathProgramCache]: Analyzing trace with hash -2122007768, now seen corresponding path program 2 times [2021-11-20 06:44:25,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:44:25,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [463887447] [2021-11-20 06:44:25,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:44:25,414 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:44:25,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:44:25,415 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:44:25,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-20 06:44:25,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:44:25,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:44:25,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-20 06:44:25,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:44:25,532 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 [2021-11-20 06:44:26,482 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 44 proven. 44 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 06:44:26,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:44:30,893 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:44:30,893 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:44:30,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [463887447] [2021-11-20 06:44:30,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [463887447] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:44:30,893 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:44:30,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 25 [2021-11-20 06:44:30,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230933849] [2021-11-20 06:44:30,894 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:44:30,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-20 06:44:30,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:44:30,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-20 06:44:30,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-11-20 06:44:30,895 INFO L87 Difference]: Start difference. First operand 257 states and 303 transitions. Second operand has 25 states, 25 states have (on average 4.12) internal successors, (103), 25 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) [2021-11-20 06:44:32,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:44:32,648 INFO L93 Difference]: Finished difference Result 336 states and 393 transitions. [2021-11-20 06:44:32,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-20 06:44:32,649 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.12) internal successors, (103), 25 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) Word has length 56 [2021-11-20 06:44:32,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:44:32,651 INFO L225 Difference]: With dead ends: 336 [2021-11-20 06:44:32,651 INFO L226 Difference]: Without dead ends: 333 [2021-11-20 06:44:32,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=118, Invalid=694, Unknown=0, NotChecked=0, Total=812 [2021-11-20 06:44:32,652 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 63 mSDsluCounter, 484 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:44:32,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 520 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 217 Invalid, 0 Unknown, 44 Unchecked, 1.0s Time] [2021-11-20 06:44:32,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-11-20 06:44:32,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 277. [2021-11-20 06:44:32,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 275 states have (on average 1.1927272727272726) internal successors, (328), 276 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:44:32,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 328 transitions. [2021-11-20 06:44:32,661 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 328 transitions. Word has length 56 [2021-11-20 06:44:32,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:44:32,662 INFO L470 AbstractCegarLoop]: Abstraction has 277 states and 328 transitions. [2021-11-20 06:44:32,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.12) internal successors, (103), 25 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) [2021-11-20 06:44:32,662 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 328 transitions. [2021-11-20 06:44:32,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-20 06:44:32,663 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:44:32,663 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:44:32,688 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-20 06:44:32,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:44:32,875 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-20 06:44:32,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:44:32,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1316142120, now seen corresponding path program 3 times [2021-11-20 06:44:32,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:44:32,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1311227533] [2021-11-20 06:44:32,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:44:32,877 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:44:32,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:44:32,878 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:44:32,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-20 06:44:33,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-20 06:44:33,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:44:33,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-20 06:44:33,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:44:33,079 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 [2021-11-20 06:44:35,589 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 69 proven. 19 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 06:44:35,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:44:42,882 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 33 proven. 55 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 06:44:42,882 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:44:42,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1311227533] [2021-11-20 06:44:42,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1311227533] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:44:42,883 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:44:42,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-11-20 06:44:42,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414000438] [2021-11-20 06:44:42,883 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:44:42,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-20 06:44:42,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:44:42,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-20 06:44:42,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=619, Unknown=0, NotChecked=0, Total=756 [2021-11-20 06:44:42,885 INFO L87 Difference]: Start difference. First operand 277 states and 328 transitions. Second operand has 28 states, 28 states have (on average 3.5) 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) [2021-11-20 06:44:43,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:44:43,414 INFO L93 Difference]: Finished difference Result 398 states and 472 transitions. [2021-11-20 06:44:43,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-20 06:44:43,415 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.5) 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 56 [2021-11-20 06:44:43,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:44:43,417 INFO L225 Difference]: With dead ends: 398 [2021-11-20 06:44:43,417 INFO L226 Difference]: Without dead ends: 392 [2021-11-20 06:44:43,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=148, Invalid=664, Unknown=0, NotChecked=0, Total=812 [2021-11-20 06:44:43,418 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 43 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:44:43,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 261 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 85 Invalid, 0 Unknown, 72 Unchecked, 0.5s Time] [2021-11-20 06:44:43,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-11-20 06:44:43,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 346. [2021-11-20 06:44:43,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 344 states have (on average 1.2034883720930232) internal successors, (414), 345 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:44:43,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 414 transitions. [2021-11-20 06:44:43,427 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 414 transitions. Word has length 56 [2021-11-20 06:44:43,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:44:43,428 INFO L470 AbstractCegarLoop]: Abstraction has 346 states and 414 transitions. [2021-11-20 06:44:43,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.5) 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) [2021-11-20 06:44:43,428 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 414 transitions. [2021-11-20 06:44:43,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-20 06:44:43,430 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:44:43,430 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:44:43,461 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2021-11-20 06:44:43,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:44:43,642 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-20 06:44:43,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:44:43,643 INFO L85 PathProgramCache]: Analyzing trace with hash 30090216, now seen corresponding path program 3 times [2021-11-20 06:44:43,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:44:43,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [243349525] [2021-11-20 06:44:43,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:44:43,643 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:44:43,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:44:43,644 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:44:43,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-20 06:44:43,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-20 06:44:43,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:44:43,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-20 06:44:43,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:44:43,873 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 [2021-11-20 06:44:46,205 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 69 proven. 19 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 06:44:46,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:44:53,265 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 33 proven. 55 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 06:44:53,265 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:44:53,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [243349525] [2021-11-20 06:44:53,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [243349525] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:44:53,265 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:44:53,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-11-20 06:44:53,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546365396] [2021-11-20 06:44:53,265 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:44:53,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-20 06:44:53,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:44:53,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-20 06:44:53,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=619, Unknown=0, NotChecked=0, Total=756 [2021-11-20 06:44:53,266 INFO L87 Difference]: Start difference. First operand 346 states and 414 transitions. Second operand has 28 states, 28 states have (on average 3.5) 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) [2021-11-20 06:44:53,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:44:53,736 INFO L93 Difference]: Finished difference Result 466 states and 555 transitions. [2021-11-20 06:44:53,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-20 06:44:53,738 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.5) 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 56 [2021-11-20 06:44:53,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:44:53,740 INFO L225 Difference]: With dead ends: 466 [2021-11-20 06:44:53,741 INFO L226 Difference]: Without dead ends: 460 [2021-11-20 06:44:53,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=148, Invalid=664, Unknown=0, NotChecked=0, Total=812 [2021-11-20 06:44:53,742 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 67 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 104 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:44:53,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 199 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 78 Invalid, 0 Unknown, 104 Unchecked, 0.4s Time] [2021-11-20 06:44:53,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-11-20 06:44:53,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 400. [2021-11-20 06:44:53,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 398 states have (on average 1.2085427135678393) internal successors, (481), 399 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:44:53,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 481 transitions. [2021-11-20 06:44:53,750 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 481 transitions. Word has length 56 [2021-11-20 06:44:53,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:44:53,750 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 481 transitions. [2021-11-20 06:44:53,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.5) 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) [2021-11-20 06:44:53,751 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 481 transitions. [2021-11-20 06:44:53,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-20 06:44:53,752 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:44:53,752 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:44:53,770 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-20 06:44:53,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:44:53,964 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-20 06:44:53,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:44:53,965 INFO L85 PathProgramCache]: Analyzing trace with hash -312326469, now seen corresponding path program 1 times [2021-11-20 06:44:53,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:44:53,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [161017077] [2021-11-20 06:44:53,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:44:53,966 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:44:53,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:44:53,968 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:44:54,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-20 06:44:54,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:44:54,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-20 06:44:54,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:44:54,125 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 [2021-11-20 06:44:55,229 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 42 proven. 56 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 06:44:55,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:44:59,748 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 06:44:59,748 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:44:59,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [161017077] [2021-11-20 06:44:59,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [161017077] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:44:59,749 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:44:59,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 25 [2021-11-20 06:44:59,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608852412] [2021-11-20 06:44:59,749 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:44:59,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-20 06:44:59,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:44:59,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-20 06:44:59,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-11-20 06:44:59,750 INFO L87 Difference]: Start difference. First operand 400 states and 481 transitions. Second operand has 25 states, 25 states have (on average 4.6) internal successors, (115), 25 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:45:01,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:45:01,790 INFO L93 Difference]: Finished difference Result 469 states and 557 transitions. [2021-11-20 06:45:01,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-20 06:45:01,792 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.6) internal successors, (115), 25 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-20 06:45:01,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:45:01,797 INFO L225 Difference]: With dead ends: 469 [2021-11-20 06:45:01,797 INFO L226 Difference]: Without dead ends: 468 [2021-11-20 06:45:01,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2021-11-20 06:45:01,798 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 76 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 491 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:45:01,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 491 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 226 Invalid, 0 Unknown, 30 Unchecked, 1.2s Time] [2021-11-20 06:45:01,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-11-20 06:45:01,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 436. [2021-11-20 06:45:01,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 434 states have (on average 1.2096774193548387) internal successors, (525), 435 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:45:01,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 525 transitions. [2021-11-20 06:45:01,809 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 525 transitions. Word has length 62 [2021-11-20 06:45:01,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:45:01,810 INFO L470 AbstractCegarLoop]: Abstraction has 436 states and 525 transitions. [2021-11-20 06:45:01,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.6) internal successors, (115), 25 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:45:01,810 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 525 transitions. [2021-11-20 06:45:01,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-20 06:45:01,811 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:45:01,812 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:45:01,848 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-20 06:45:02,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:45:02,023 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-20 06:45:02,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:45:02,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1169143877, now seen corresponding path program 4 times [2021-11-20 06:45:02,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:45:02,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1493756716] [2021-11-20 06:45:02,024 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 06:45:02,025 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:45:02,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:45:02,026 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:45:02,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-20 06:45:02,139 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 06:45:02,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:45:02,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-20 06:45:02,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:45:02,164 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 [2021-11-20 06:45:03,248 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 42 proven. 61 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 06:45:03,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:45:07,829 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 107 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 06:45:07,830 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:45:07,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1493756716] [2021-11-20 06:45:07,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1493756716] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:45:07,830 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:45:07,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 25 [2021-11-20 06:45:07,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322717163] [2021-11-20 06:45:07,830 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:45:07,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-20 06:45:07,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:45:07,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-20 06:45:07,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-11-20 06:45:07,832 INFO L87 Difference]: Start difference. First operand 436 states and 525 transitions. Second operand has 25 states, 25 states have (on average 4.6) internal successors, (115), 25 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:45:09,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:45:09,811 INFO L93 Difference]: Finished difference Result 478 states and 569 transitions. [2021-11-20 06:45:09,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-20 06:45:09,815 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.6) internal successors, (115), 25 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-20 06:45:09,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:45:09,817 INFO L225 Difference]: With dead ends: 478 [2021-11-20 06:45:09,817 INFO L226 Difference]: Without dead ends: 477 [2021-11-20 06:45:09,818 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2021-11-20 06:45:09,819 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 79 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:45:09,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 391 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 227 Invalid, 0 Unknown, 21 Unchecked, 1.4s Time] [2021-11-20 06:45:09,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2021-11-20 06:45:09,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 452. [2021-11-20 06:45:09,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 450 states have (on average 1.2066666666666668) internal successors, (543), 451 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:45:09,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 543 transitions. [2021-11-20 06:45:09,831 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 543 transitions. Word has length 62 [2021-11-20 06:45:09,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:45:09,832 INFO L470 AbstractCegarLoop]: Abstraction has 452 states and 543 transitions. [2021-11-20 06:45:09,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.6) internal successors, (115), 25 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:45:09,833 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 543 transitions. [2021-11-20 06:45:09,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-20 06:45:09,834 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:45:09,834 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:45:09,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-20 06:45:10,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:45:10,050 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-20 06:45:10,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:45:10,050 INFO L85 PathProgramCache]: Analyzing trace with hash 523652987, now seen corresponding path program 2 times [2021-11-20 06:45:10,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:45:10,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2001344357] [2021-11-20 06:45:10,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:45:10,051 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:45:10,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:45:10,052 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:45:10,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-20 06:45:10,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:45:10,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:45:10,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-20 06:45:10,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:45:10,166 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 [2021-11-20 06:45:11,334 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 42 proven. 56 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 06:45:11,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:45:16,949 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 06:45:16,949 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:45:16,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2001344357] [2021-11-20 06:45:16,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2001344357] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:45:16,949 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:45:16,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 25 [2021-11-20 06:45:16,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038060323] [2021-11-20 06:45:16,950 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:45:16,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-20 06:45:16,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:45:16,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-20 06:45:16,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-11-20 06:45:16,951 INFO L87 Difference]: Start difference. First operand 452 states and 543 transitions. Second operand has 25 states, 25 states have (on average 4.6) internal successors, (115), 25 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:45:19,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:45:19,785 INFO L93 Difference]: Finished difference Result 545 states and 651 transitions. [2021-11-20 06:45:19,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-20 06:45:19,787 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.6) internal successors, (115), 25 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-20 06:45:19,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:45:19,790 INFO L225 Difference]: With dead ends: 545 [2021-11-20 06:45:19,790 INFO L226 Difference]: Without dead ends: 544 [2021-11-20 06:45:19,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=131, Invalid=799, Unknown=0, NotChecked=0, Total=930 [2021-11-20 06:45:19,791 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 59 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:45:19,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 532 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 225 Invalid, 0 Unknown, 75 Unchecked, 1.5s Time] [2021-11-20 06:45:19,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-11-20 06:45:19,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 476. [2021-11-20 06:45:19,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 474 states have (on average 1.2067510548523206) internal successors, (572), 475 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:45:19,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 572 transitions. [2021-11-20 06:45:19,804 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 572 transitions. Word has length 62 [2021-11-20 06:45:19,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:45:19,805 INFO L470 AbstractCegarLoop]: Abstraction has 476 states and 572 transitions. [2021-11-20 06:45:19,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.6) internal successors, (115), 25 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:45:19,805 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 572 transitions. [2021-11-20 06:45:19,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-20 06:45:19,807 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:45:19,807 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:45:19,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-20 06:45:20,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:45:20,020 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-20 06:45:20,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:45:20,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1839771515, now seen corresponding path program 3 times [2021-11-20 06:45:20,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:45:20,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [933654362] [2021-11-20 06:45:20,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:45:20,022 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:45:20,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:45:20,023 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:45:20,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-20 06:45:20,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-20 06:45:20,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:45:20,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-20 06:45:20,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:45:20,298 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 [2021-11-20 06:45:21,522 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 20 proven. 82 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 06:45:21,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:45:26,372 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 06:45:26,372 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:45:26,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [933654362] [2021-11-20 06:45:26,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [933654362] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:45:26,372 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:45:26,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2021-11-20 06:45:26,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867509536] [2021-11-20 06:45:26,373 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:45:26,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-20 06:45:26,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:45:26,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-20 06:45:26,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-11-20 06:45:26,374 INFO L87 Difference]: Start difference. First operand 476 states and 572 transitions. Second operand has 26 states, 26 states have (on average 4.538461538461538) internal successors, (118), 26 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:45:30,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:45:30,443 INFO L93 Difference]: Finished difference Result 738 states and 873 transitions. [2021-11-20 06:45:30,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-20 06:45:30,448 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.538461538461538) internal successors, (118), 26 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-20 06:45:30,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:45:30,452 INFO L225 Difference]: With dead ends: 738 [2021-11-20 06:45:30,452 INFO L226 Difference]: Without dead ends: 727 [2021-11-20 06:45:30,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=169, Invalid=1021, Unknown=0, NotChecked=0, Total=1190 [2021-11-20 06:45:30,455 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 107 mSDsluCounter, 729 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 786 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 141 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:45:30,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 786 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 384 Invalid, 0 Unknown, 141 Unchecked, 2.0s Time] [2021-11-20 06:45:30,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 727 states. [2021-11-20 06:45:30,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 727 to 511. [2021-11-20 06:45:30,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 509 states have (on average 1.2102161100196465) internal successors, (616), 510 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:45:30,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 616 transitions. [2021-11-20 06:45:30,469 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 616 transitions. Word has length 62 [2021-11-20 06:45:30,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:45:30,469 INFO L470 AbstractCegarLoop]: Abstraction has 511 states and 616 transitions. [2021-11-20 06:45:30,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.538461538461538) internal successors, (118), 26 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:45:30,470 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 616 transitions. [2021-11-20 06:45:30,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-20 06:45:30,471 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:45:30,471 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:45:30,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-20 06:45:30,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:45:30,684 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-20 06:45:30,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:45:30,684 INFO L85 PathProgramCache]: Analyzing trace with hash -762398917, now seen corresponding path program 4 times [2021-11-20 06:45:30,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:45:30,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1438118347] [2021-11-20 06:45:30,685 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 06:45:30,685 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:45:30,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:45:30,686 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:45:30,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-20 06:45:30,773 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 06:45:30,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:45:30,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-20 06:45:30,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:45:30,803 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 [2021-11-20 06:45:31,834 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 42 proven. 63 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 06:45:31,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:45:36,202 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 06:45:36,202 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:45:36,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1438118347] [2021-11-20 06:45:36,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1438118347] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:45:36,202 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:45:36,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 25 [2021-11-20 06:45:36,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267190303] [2021-11-20 06:45:36,203 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:45:36,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-20 06:45:36,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:45:36,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-20 06:45:36,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-11-20 06:45:36,205 INFO L87 Difference]: Start difference. First operand 511 states and 616 transitions. Second operand has 25 states, 25 states have (on average 4.6) internal successors, (115), 25 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:45:41,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:45:41,530 INFO L93 Difference]: Finished difference Result 581 states and 690 transitions. [2021-11-20 06:45:41,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-20 06:45:41,531 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.6) internal successors, (115), 25 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-20 06:45:41,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:45:41,533 INFO L225 Difference]: With dead ends: 581 [2021-11-20 06:45:41,533 INFO L226 Difference]: Without dead ends: 574 [2021-11-20 06:45:41,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 102 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=160, Invalid=1100, Unknown=0, NotChecked=0, Total=1260 [2021-11-20 06:45:41,534 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 76 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:45:41,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 520 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 234 Invalid, 0 Unknown, 28 Unchecked, 1.4s Time] [2021-11-20 06:45:41,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2021-11-20 06:45:41,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 526. [2021-11-20 06:45:41,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 526 states, 524 states have (on average 1.2118320610687023) internal successors, (635), 525 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:45:41,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 635 transitions. [2021-11-20 06:45:41,543 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 635 transitions. Word has length 62 [2021-11-20 06:45:41,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:45:41,544 INFO L470 AbstractCegarLoop]: Abstraction has 526 states and 635 transitions. [2021-11-20 06:45:41,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.6) internal successors, (115), 25 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:45:41,544 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 635 transitions. [2021-11-20 06:45:41,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-20 06:45:41,546 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:45:41,546 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:45:41,573 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-20 06:45:41,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:45:41,758 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-20 06:45:41,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:45:41,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1716615227, now seen corresponding path program 4 times [2021-11-20 06:45:41,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:45:41,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2020217866] [2021-11-20 06:45:41,758 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 06:45:41,759 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:45:41,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:45:41,759 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:45:41,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-20 06:45:41,843 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 06:45:41,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:45:41,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-20 06:45:41,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:45:41,867 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 [2021-11-20 06:45:42,851 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 42 proven. 56 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 06:45:42,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:45:47,407 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 06:45:47,407 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:45:47,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2020217866] [2021-11-20 06:45:47,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2020217866] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:45:47,407 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:45:47,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 25 [2021-11-20 06:45:47,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54625043] [2021-11-20 06:45:47,408 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:45:47,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-20 06:45:47,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:45:47,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-20 06:45:47,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-11-20 06:45:47,409 INFO L87 Difference]: Start difference. First operand 526 states and 635 transitions. Second operand has 25 states, 25 states have (on average 4.6) internal successors, (115), 25 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:45:49,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:45:49,691 INFO L93 Difference]: Finished difference Result 658 states and 789 transitions. [2021-11-20 06:45:49,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-20 06:45:49,693 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.6) internal successors, (115), 25 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-20 06:45:49,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:45:49,696 INFO L225 Difference]: With dead ends: 658 [2021-11-20 06:45:49,696 INFO L226 Difference]: Without dead ends: 657 [2021-11-20 06:45:49,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=118, Invalid=694, Unknown=0, NotChecked=0, Total=812 [2021-11-20 06:45:49,697 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 76 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:45:49,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 553 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 280 Invalid, 0 Unknown, 27 Unchecked, 1.6s Time] [2021-11-20 06:45:49,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2021-11-20 06:45:49,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 579. [2021-11-20 06:45:49,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579 states, 577 states have (on average 1.2114384748700173) internal successors, (699), 578 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:45:49,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 699 transitions. [2021-11-20 06:45:49,709 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 699 transitions. Word has length 62 [2021-11-20 06:45:49,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:45:49,709 INFO L470 AbstractCegarLoop]: Abstraction has 579 states and 699 transitions. [2021-11-20 06:45:49,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.6) internal successors, (115), 25 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:45:49,710 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 699 transitions. [2021-11-20 06:45:49,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-20 06:45:49,711 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:45:49,711 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:45:49,726 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2021-11-20 06:45:49,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:45:49,923 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-20 06:45:49,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:45:49,923 INFO L85 PathProgramCache]: Analyzing trace with hash 911339643, now seen corresponding path program 5 times [2021-11-20 06:45:49,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:45:49,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1181513099] [2021-11-20 06:45:49,924 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 06:45:49,924 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:45:49,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:45:49,925 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:45:49,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-20 06:45:50,079 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-11-20 06:45:50,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:45:50,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-20 06:45:50,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:45:50,101 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 [2021-11-20 06:45:51,128 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 42 proven. 61 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 06:45:51,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:45:55,999 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 107 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 06:45:55,999 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:45:55,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1181513099] [2021-11-20 06:45:55,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1181513099] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:45:55,999 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:45:56,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2021-11-20 06:45:56,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113703282] [2021-11-20 06:45:56,000 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:45:56,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-20 06:45:56,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:45:56,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-20 06:45:56,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2021-11-20 06:45:56,001 INFO L87 Difference]: Start difference. First operand 579 states and 699 transitions. Second operand has 26 states, 26 states have (on average 4.423076923076923) internal successors, (115), 26 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:45:58,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:45:58,001 INFO L93 Difference]: Finished difference Result 639 states and 764 transitions. [2021-11-20 06:45:58,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-20 06:45:58,002 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.423076923076923) internal successors, (115), 26 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-20 06:45:58,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:45:58,004 INFO L225 Difference]: With dead ends: 639 [2021-11-20 06:45:58,004 INFO L226 Difference]: Without dead ends: 635 [2021-11-20 06:45:58,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=145, Invalid=725, Unknown=0, NotChecked=0, Total=870 [2021-11-20 06:45:58,005 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 79 mSDsluCounter, 560 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:45:58,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 595 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 316 Invalid, 0 Unknown, 73 Unchecked, 1.6s Time] [2021-11-20 06:45:58,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2021-11-20 06:45:58,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 607. [2021-11-20 06:45:58,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 605 states have (on average 1.2115702479338843) internal successors, (733), 606 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:45:58,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 733 transitions. [2021-11-20 06:45:58,016 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 733 transitions. Word has length 62 [2021-11-20 06:45:58,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:45:58,017 INFO L470 AbstractCegarLoop]: Abstraction has 607 states and 733 transitions. [2021-11-20 06:45:58,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.423076923076923) internal successors, (115), 26 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:45:58,017 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 733 transitions. [2021-11-20 06:45:58,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-20 06:45:58,018 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:45:58,019 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:45:58,041 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (30)] Ended with exit code 0 [2021-11-20 06:45:58,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:45:58,231 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-20 06:45:58,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:45:58,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1690830789, now seen corresponding path program 5 times [2021-11-20 06:45:58,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:45:58,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [493999130] [2021-11-20 06:45:58,232 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 06:45:58,232 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:45:58,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:45:58,233 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:45:58,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-20 06:45:58,393 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-11-20 06:45:58,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:45:58,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-20 06:45:58,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:45:58,418 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 [2021-11-20 06:45:59,431 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 42 proven. 56 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 06:45:59,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:46:04,227 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 06:46:04,228 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:46:04,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [493999130] [2021-11-20 06:46:04,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [493999130] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:46:04,228 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:46:04,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2021-11-20 06:46:04,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947877072] [2021-11-20 06:46:04,228 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:46:04,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-20 06:46:04,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:46:04,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-20 06:46:04,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2021-11-20 06:46:04,230 INFO L87 Difference]: Start difference. First operand 607 states and 733 transitions. Second operand has 26 states, 26 states have (on average 4.423076923076923) internal successors, (115), 26 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:46:06,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:46:06,535 INFO L93 Difference]: Finished difference Result 704 states and 843 transitions. [2021-11-20 06:46:06,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-20 06:46:06,537 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.423076923076923) internal successors, (115), 26 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-20 06:46:06,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:46:06,540 INFO L225 Difference]: With dead ends: 704 [2021-11-20 06:46:06,540 INFO L226 Difference]: Without dead ends: 703 [2021-11-20 06:46:06,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=158, Invalid=834, Unknown=0, NotChecked=0, Total=992 [2021-11-20 06:46:06,541 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 101 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:46:06,541 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 436 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 264 Invalid, 0 Unknown, 11 Unchecked, 1.4s Time] [2021-11-20 06:46:06,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2021-11-20 06:46:06,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 635. [2021-11-20 06:46:06,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 633 states have (on average 1.2116903633491312) internal successors, (767), 634 states have internal predecessors, (767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:46:06,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 767 transitions. [2021-11-20 06:46:06,553 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 767 transitions. Word has length 62 [2021-11-20 06:46:06,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:46:06,553 INFO L470 AbstractCegarLoop]: Abstraction has 635 states and 767 transitions. [2021-11-20 06:46:06,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.423076923076923) internal successors, (115), 26 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:46:06,553 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 767 transitions. [2021-11-20 06:46:06,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-20 06:46:06,555 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:46:06,555 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:46:06,581 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-20 06:46:06,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:46:06,768 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-20 06:46:06,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:46:06,768 INFO L85 PathProgramCache]: Analyzing trace with hash -945032965, now seen corresponding path program 6 times [2021-11-20 06:46:06,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:46:06,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [55709782] [2021-11-20 06:46:06,769 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 06:46:06,769 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:46:06,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:46:06,769 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:46:06,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-20 06:46:06,981 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-11-20 06:46:06,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:46:06,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-20 06:46:06,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:46:07,011 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 [2021-11-20 06:46:08,216 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 20 proven. 82 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 06:46:08,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:46:12,510 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 06:46:12,510 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:46:12,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [55709782] [2021-11-20 06:46:12,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [55709782] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:46:12,510 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:46:12,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2021-11-20 06:46:12,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148832479] [2021-11-20 06:46:12,511 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:46:12,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-20 06:46:12,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:46:12,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-20 06:46:12,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-11-20 06:46:12,512 INFO L87 Difference]: Start difference. First operand 635 states and 767 transitions. Second operand has 26 states, 26 states have (on average 4.538461538461538) internal successors, (118), 26 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:46:22,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:46:22,387 INFO L93 Difference]: Finished difference Result 949 states and 1138 transitions. [2021-11-20 06:46:22,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-20 06:46:22,389 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.538461538461538) internal successors, (118), 26 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-20 06:46:22,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:46:22,392 INFO L225 Difference]: With dead ends: 949 [2021-11-20 06:46:22,393 INFO L226 Difference]: Without dead ends: 943 [2021-11-20 06:46:22,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 98 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=229, Invalid=1493, Unknown=0, NotChecked=0, Total=1722 [2021-11-20 06:46:22,394 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 124 mSDsluCounter, 731 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 788 SdHoareTripleChecker+Invalid, 688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 151 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:46:22,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 788 Invalid, 688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 517 Invalid, 0 Unknown, 151 Unchecked, 4.5s Time] [2021-11-20 06:46:22,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2021-11-20 06:46:22,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 689. [2021-11-20 06:46:22,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 689 states, 687 states have (on average 1.2212518195050945) internal successors, (839), 688 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:46:22,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 689 states to 689 states and 839 transitions. [2021-11-20 06:46:22,405 INFO L78 Accepts]: Start accepts. Automaton has 689 states and 839 transitions. Word has length 62 [2021-11-20 06:46:22,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:46:22,405 INFO L470 AbstractCegarLoop]: Abstraction has 689 states and 839 transitions. [2021-11-20 06:46:22,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.538461538461538) internal successors, (118), 26 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:46:22,405 INFO L276 IsEmpty]: Start isEmpty. Operand 689 states and 839 transitions. [2021-11-20 06:46:22,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-20 06:46:22,407 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:46:22,407 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:46:22,433 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-11-20 06:46:22,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:46:22,620 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-20 06:46:22,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:46:22,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1445824571, now seen corresponding path program 7 times [2021-11-20 06:46:22,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:46:22,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [895346982] [2021-11-20 06:46:22,621 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 06:46:22,621 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:46:22,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:46:22,622 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:46:22,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-20 06:46:22,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:46:22,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-20 06:46:22,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:46:22,744 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 [2021-11-20 06:46:23,784 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 42 proven. 56 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 06:46:23,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:46:28,446 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 06:46:28,446 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:46:28,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [895346982] [2021-11-20 06:46:28,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [895346982] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:46:28,447 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:46:28,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 25 [2021-11-20 06:46:28,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746646196] [2021-11-20 06:46:28,447 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:46:28,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-20 06:46:28,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:46:28,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-20 06:46:28,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-11-20 06:46:28,448 INFO L87 Difference]: Start difference. First operand 689 states and 839 transitions. Second operand has 25 states, 25 states have (on average 4.6) internal successors, (115), 25 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:46:30,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:46:30,624 INFO L93 Difference]: Finished difference Result 816 states and 984 transitions. [2021-11-20 06:46:30,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-20 06:46:30,626 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.6) internal successors, (115), 25 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-20 06:46:30,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:46:30,629 INFO L225 Difference]: With dead ends: 816 [2021-11-20 06:46:30,629 INFO L226 Difference]: Without dead ends: 815 [2021-11-20 06:46:30,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2021-11-20 06:46:30,630 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 87 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:46:30,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 443 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 218 Invalid, 0 Unknown, 47 Unchecked, 1.4s Time] [2021-11-20 06:46:30,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 815 states. [2021-11-20 06:46:30,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 815 to 743. [2021-11-20 06:46:30,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 741 states have (on average 1.224021592442645) internal successors, (907), 742 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:46:30,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 907 transitions. [2021-11-20 06:46:30,644 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 907 transitions. Word has length 62 [2021-11-20 06:46:30,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:46:30,645 INFO L470 AbstractCegarLoop]: Abstraction has 743 states and 907 transitions. [2021-11-20 06:46:30,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.6) internal successors, (115), 25 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:46:30,645 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 907 transitions. [2021-11-20 06:46:30,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-20 06:46:30,647 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:46:30,647 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:46:30,673 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-11-20 06:46:30,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:46:30,859 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-20 06:46:30,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:46:30,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1156345861, now seen corresponding path program 5 times [2021-11-20 06:46:30,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:46:30,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1946333232] [2021-11-20 06:46:30,861 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 06:46:30,861 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:46:30,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:46:30,862 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:46:30,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-20 06:46:31,015 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-11-20 06:46:31,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:46:31,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-20 06:46:31,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:46:31,041 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 [2021-11-20 06:46:32,074 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 42 proven. 63 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 06:46:32,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:46:36,814 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 06:46:36,814 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:46:36,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1946333232] [2021-11-20 06:46:36,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1946333232] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:46:36,815 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:46:36,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2021-11-20 06:46:36,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932124345] [2021-11-20 06:46:36,815 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:46:36,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-20 06:46:36,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:46:36,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-20 06:46:36,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2021-11-20 06:46:36,816 INFO L87 Difference]: Start difference. First operand 743 states and 907 transitions. Second operand has 26 states, 26 states have (on average 4.423076923076923) internal successors, (115), 26 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:46:42,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:46:42,216 INFO L93 Difference]: Finished difference Result 838 states and 1010 transitions. [2021-11-20 06:46:42,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-20 06:46:42,218 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.423076923076923) internal successors, (115), 26 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-20 06:46:42,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:46:42,221 INFO L225 Difference]: With dead ends: 838 [2021-11-20 06:46:42,221 INFO L226 Difference]: Without dead ends: 831 [2021-11-20 06:46:42,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=179, Invalid=1081, Unknown=0, NotChecked=0, Total=1260 [2021-11-20 06:46:42,222 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 109 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-20 06:46:42,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 448 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 255 Invalid, 0 Unknown, 12 Unchecked, 1.9s Time] [2021-11-20 06:46:42,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2021-11-20 06:46:42,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 764. [2021-11-20 06:46:42,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 762 states have (on average 1.2230971128608923) internal successors, (932), 763 states have internal predecessors, (932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:46:42,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 932 transitions. [2021-11-20 06:46:42,235 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 932 transitions. Word has length 62 [2021-11-20 06:46:42,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:46:42,236 INFO L470 AbstractCegarLoop]: Abstraction has 764 states and 932 transitions. [2021-11-20 06:46:42,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.423076923076923) internal successors, (115), 26 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:46:42,236 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 932 transitions. [2021-11-20 06:46:42,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-20 06:46:42,238 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:46:42,238 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:46:42,265 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-11-20 06:46:42,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:46:42,450 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-20 06:46:42,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:46:42,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1322668283, now seen corresponding path program 8 times [2021-11-20 06:46:42,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:46:42,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1672099834] [2021-11-20 06:46:42,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:46:42,451 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:46:42,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:46:42,452 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:46:42,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-20 06:46:42,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:46:42,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:46:42,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-20 06:46:42,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:46:42,557 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 [2021-11-20 06:46:43,546 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 42 proven. 56 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 06:46:43,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:46:48,061 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 06:46:48,061 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:46:48,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1672099834] [2021-11-20 06:46:48,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1672099834] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:46:48,062 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:46:48,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 25 [2021-11-20 06:46:48,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737017235] [2021-11-20 06:46:48,062 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:46:48,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-20 06:46:48,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:46:48,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-20 06:46:48,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-11-20 06:46:48,063 INFO L87 Difference]: Start difference. First operand 764 states and 932 transitions. Second operand has 25 states, 25 states have (on average 4.6) internal successors, (115), 25 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:46:50,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:46:50,217 INFO L93 Difference]: Finished difference Result 919 states and 1107 transitions. [2021-11-20 06:46:50,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-20 06:46:50,218 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.6) internal successors, (115), 25 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-20 06:46:50,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:46:50,222 INFO L225 Difference]: With dead ends: 919 [2021-11-20 06:46:50,222 INFO L226 Difference]: Without dead ends: 918 [2021-11-20 06:46:50,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=118, Invalid=694, Unknown=0, NotChecked=0, Total=812 [2021-11-20 06:46:50,223 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 58 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:46:50,223 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 533 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 256 Invalid, 0 Unknown, 70 Unchecked, 1.4s Time] [2021-11-20 06:46:50,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 918 states. [2021-11-20 06:46:50,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 918 to 833. [2021-11-20 06:46:50,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 831 states have (on average 1.2226233453670277) internal successors, (1016), 832 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:46:50,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 1016 transitions. [2021-11-20 06:46:50,237 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 1016 transitions. Word has length 62 [2021-11-20 06:46:50,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:46:50,237 INFO L470 AbstractCegarLoop]: Abstraction has 833 states and 1016 transitions. [2021-11-20 06:46:50,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.6) internal successors, (115), 25 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:46:50,238 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 1016 transitions. [2021-11-20 06:46:50,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-20 06:46:50,239 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:46:50,240 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:46:50,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-11-20 06:46:50,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:46:50,457 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-20 06:46:50,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:46:50,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1267365445, now seen corresponding path program 9 times [2021-11-20 06:46:50,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:46:50,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1353504466] [2021-11-20 06:46:50,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:46:50,458 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:46:50,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:46:50,458 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:46:50,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-11-20 06:46:50,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-20 06:46:50,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:46:50,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-20 06:46:50,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:46:50,648 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 [2021-11-20 06:46:53,031 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 76 proven. 19 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 06:46:53,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:47:01,694 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 34 proven. 61 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 06:47:01,695 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:47:01,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1353504466] [2021-11-20 06:47:01,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1353504466] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:47:01,695 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:47:01,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-11-20 06:47:01,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43889893] [2021-11-20 06:47:01,696 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:47:01,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-20 06:47:01,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:47:01,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-20 06:47:01,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=619, Unknown=0, NotChecked=0, Total=756 [2021-11-20 06:47:01,697 INFO L87 Difference]: Start difference. First operand 833 states and 1016 transitions. Second operand has 28 states, 28 states have (on average 3.857142857142857) internal successors, (108), 28 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:47:02,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:47:02,148 INFO L93 Difference]: Finished difference Result 1030 states and 1242 transitions. [2021-11-20 06:47:02,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 06:47:02,150 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.857142857142857) internal successors, (108), 28 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-20 06:47:02,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:47:02,153 INFO L225 Difference]: With dead ends: 1030 [2021-11-20 06:47:02,153 INFO L226 Difference]: Without dead ends: 1024 [2021-11-20 06:47:02,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 96 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=148, Invalid=664, Unknown=0, NotChecked=0, Total=812 [2021-11-20 06:47:02,154 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 50 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 96 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:47:02,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 237 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 73 Invalid, 0 Unknown, 96 Unchecked, 0.3s Time] [2021-11-20 06:47:02,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1024 states. [2021-11-20 06:47:02,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1024 to 643. [2021-11-20 06:47:02,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 643 states, 641 states have (on average 1.204368174726989) internal successors, (772), 642 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:47:02,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 772 transitions. [2021-11-20 06:47:02,167 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 772 transitions. Word has length 62 [2021-11-20 06:47:02,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:47:02,167 INFO L470 AbstractCegarLoop]: Abstraction has 643 states and 772 transitions. [2021-11-20 06:47:02,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.857142857142857) internal successors, (108), 28 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:47:02,168 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 772 transitions. [2021-11-20 06:47:02,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-20 06:47:02,171 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:47:02,171 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 1, 1, 1, 1, 1] [2021-11-20 06:47:02,197 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-11-20 06:47:02,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:47:02,383 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-20 06:47:02,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:47:02,384 INFO L85 PathProgramCache]: Analyzing trace with hash 58542645, now seen corresponding path program 4 times [2021-11-20 06:47:02,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:47:02,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [588220750] [2021-11-20 06:47:02,384 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 06:47:02,385 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:47:02,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:47:02,385 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:47:02,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-11-20 06:47:02,489 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 06:47:02,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:47:02,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-20 06:47:02,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:47:02,517 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 [2021-11-20 06:47:04,612 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:47:04,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:47:16,374 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:47:16,374 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:47:16,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [588220750] [2021-11-20 06:47:16,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [588220750] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:47:16,375 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:47:16,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 45 [2021-11-20 06:47:16,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266690900] [2021-11-20 06:47:16,375 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:47:16,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-20 06:47:16,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:47:16,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-20 06:47:16,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=545, Invalid=1525, Unknown=0, NotChecked=0, Total=2070 [2021-11-20 06:47:16,377 INFO L87 Difference]: Start difference. First operand 643 states and 772 transitions. Second operand has 46 states, 45 states have (on average 2.888888888888889) internal successors, (130), 46 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:47:34,393 WARN L227 SmtUtils]: Spent 11.95s on a formula simplification that was a NOOP. DAG size: 171 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:47:35,546 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:47:37,555 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:47:39,607 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:47:41,610 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:47:51,370 WARN L227 SmtUtils]: Spent 9.22s on a formula simplification that was a NOOP. DAG size: 168 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:48:11,023 WARN L227 SmtUtils]: Spent 18.68s on a formula simplification. DAG size of input: 163 DAG size of output: 163 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:48:21,473 WARN L227 SmtUtils]: Spent 9.64s on a formula simplification that was a NOOP. DAG size: 160 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:48:23,812 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:48:25,814 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:48:27,817 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:48:37,096 WARN L227 SmtUtils]: Spent 8.72s on a formula simplification that was a NOOP. DAG size: 157 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:48:53,329 WARN L227 SmtUtils]: Spent 15.11s on a formula simplification. DAG size of input: 152 DAG size of output: 152 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:49:00,966 WARN L227 SmtUtils]: Spent 6.98s on a formula simplification that was a NOOP. DAG size: 149 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:49:03,589 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:49:05,622 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:49:07,625 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:49:14,546 WARN L227 SmtUtils]: Spent 6.37s on a formula simplification that was a NOOP. DAG size: 146 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:49:28,163 WARN L227 SmtUtils]: Spent 12.35s on a formula simplification. DAG size of input: 141 DAG size of output: 141 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:49:35,735 WARN L227 SmtUtils]: Spent 6.93s on a formula simplification that was a NOOP. DAG size: 138 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:49:38,152 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:49:40,192 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:49:42,195 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:49:49,205 WARN L227 SmtUtils]: Spent 6.31s on a formula simplification that was a NOOP. DAG size: 136 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:49:58,850 WARN L227 SmtUtils]: Spent 8.69s on a formula simplification. DAG size of input: 131 DAG size of output: 131 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:50:05,072 WARN L227 SmtUtils]: Spent 5.58s on a formula simplification that was a NOOP. DAG size: 128 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:50:07,344 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:50:09,386 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:50:11,389 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:50:17,244 WARN L227 SmtUtils]: Spent 5.14s on a formula simplification that was a NOOP. DAG size: 125 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:50:26,836 WARN L227 SmtUtils]: Spent 8.36s on a formula simplification. DAG size of input: 120 DAG size of output: 120 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:50:34,384 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:50:36,387 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:50:38,390 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:50:48,998 WARN L227 SmtUtils]: Spent 5.72s on a formula simplification. DAG size of input: 109 DAG size of output: 109 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:50:54,320 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:50:56,323 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:50:58,326 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:51:12,012 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:51:14,065 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:51:24,665 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:51:26,687 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:51:33,136 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:51:35,186 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:51:37,335 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 [] [2021-11-20 06:51:52,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:51:52,281 INFO L93 Difference]: Finished difference Result 4088 states and 4700 transitions. [2021-11-20 06:51:52,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-11-20 06:51:52,282 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 2.888888888888889) internal successors, (130), 46 states have internal predecessors, (130), 0 states have call successors, (0), 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 [2021-11-20 06:51:52,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:51:52,296 INFO L225 Difference]: With dead ends: 4088 [2021-11-20 06:51:52,296 INFO L226 Difference]: Without dead ends: 4088 [2021-11-20 06:51:52,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3085 ImplicationChecksByTransitivity, 212.4s TimeCoverageRelationStatistics Valid=2682, Invalid=6248, Unknown=0, NotChecked=0, Total=8930 [2021-11-20 06:51:52,299 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 5981 mSDsluCounter, 3015 mSDsCounter, 0 mSdLazyCounter, 3560 mSolverCounterSat, 159 mSolverCounterUnsat, 27 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 70.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5981 SdHoareTripleChecker+Valid, 3164 SdHoareTripleChecker+Invalid, 3778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 3560 IncrementalHoareTripleChecker+Invalid, 27 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 71.8s IncrementalHoareTripleChecker+Time [2021-11-20 06:51:52,299 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5981 Valid, 3164 Invalid, 3778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 3560 Invalid, 27 Unknown, 32 Unchecked, 71.8s Time] [2021-11-20 06:51:52,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4088 states. [2021-11-20 06:51:52,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4088 to 707. [2021-11-20 06:51:52,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 707 states, 705 states have (on average 1.2085106382978723) internal successors, (852), 706 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:51:52,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 707 states to 707 states and 852 transitions. [2021-11-20 06:51:52,326 INFO L78 Accepts]: Start accepts. Automaton has 707 states and 852 transitions. Word has length 66 [2021-11-20 06:51:52,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:51:52,327 INFO L470 AbstractCegarLoop]: Abstraction has 707 states and 852 transitions. [2021-11-20 06:51:52,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 2.888888888888889) internal successors, (130), 46 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:51:52,327 INFO L276 IsEmpty]: Start isEmpty. Operand 707 states and 852 transitions. [2021-11-20 06:51:52,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-20 06:51:52,329 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:51:52,329 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:51:52,344 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (37)] Ended with exit code 0 [2021-11-20 06:51:52,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:51:52,541 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-20 06:51:52,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:51:52,541 INFO L85 PathProgramCache]: Analyzing trace with hash -654409778, now seen corresponding path program 10 times [2021-11-20 06:51:52,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:51:52,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1901229492] [2021-11-20 06:51:52,542 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 06:51:52,542 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:51:52,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:51:52,543 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:51:52,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-11-20 06:51:52,637 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 06:51:52,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:51:52,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-20 06:51:52,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:51:52,668 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 [2021-11-20 06:51:53,941 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 45 proven. 68 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 06:51:53,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:51:58,869 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 06:51:58,869 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:51:58,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1901229492] [2021-11-20 06:51:58,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1901229492] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:51:58,869 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:51:58,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 25 [2021-11-20 06:51:58,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055852187] [2021-11-20 06:51:58,870 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:51:58,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-20 06:51:58,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:51:58,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-20 06:51:58,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-11-20 06:51:58,871 INFO L87 Difference]: Start difference. First operand 707 states and 852 transitions. Second operand has 25 states, 25 states have (on average 5.0) internal successors, (125), 25 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) [2021-11-20 06:52:00,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:52:00,331 INFO L93 Difference]: Finished difference Result 731 states and 874 transitions. [2021-11-20 06:52:00,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 06:52:00,332 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.0) internal successors, (125), 25 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 68 [2021-11-20 06:52:00,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:52:00,336 INFO L225 Difference]: With dead ends: 731 [2021-11-20 06:52:00,336 INFO L226 Difference]: Without dead ends: 706 [2021-11-20 06:52:00,337 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2021-11-20 06:52:00,337 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 61 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:52:00,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 384 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 189 Invalid, 0 Unknown, 46 Unchecked, 1.1s Time] [2021-11-20 06:52:00,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2021-11-20 06:52:00,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 679. [2021-11-20 06:52:00,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 679 states, 677 states have (on average 1.2112259970457901) internal successors, (820), 678 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:52:00,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 679 states to 679 states and 820 transitions. [2021-11-20 06:52:00,363 INFO L78 Accepts]: Start accepts. Automaton has 679 states and 820 transitions. Word has length 68 [2021-11-20 06:52:00,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:52:00,364 INFO L470 AbstractCegarLoop]: Abstraction has 679 states and 820 transitions. [2021-11-20 06:52:00,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.0) internal successors, (125), 25 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) [2021-11-20 06:52:00,364 INFO L276 IsEmpty]: Start isEmpty. Operand 679 states and 820 transitions. [2021-11-20 06:52:00,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-20 06:52:00,366 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:52:00,366 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:52:00,381 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2021-11-20 06:52:00,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:52:00,578 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-20 06:52:00,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:52:00,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1582841650, now seen corresponding path program 11 times [2021-11-20 06:52:00,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:52:00,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [774930836] [2021-11-20 06:52:00,579 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 06:52:00,579 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:52:00,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:52:00,580 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:52:00,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2021-11-20 06:52:00,801 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-11-20 06:52:00,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:52:00,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-20 06:52:00,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:52:00,835 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 [2021-11-20 06:52:02,083 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 45 proven. 67 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 06:52:02,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:52:07,405 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 116 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 06:52:07,405 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:52:07,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [774930836] [2021-11-20 06:52:07,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [774930836] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:52:07,405 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:52:07,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2021-11-20 06:52:07,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280298275] [2021-11-20 06:52:07,406 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:52:07,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-20 06:52:07,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:52:07,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-20 06:52:07,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2021-11-20 06:52:07,407 INFO L87 Difference]: Start difference. First operand 679 states and 820 transitions. Second operand has 26 states, 26 states have (on average 4.8076923076923075) internal successors, (125), 26 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) [2021-11-20 06:52:09,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:52:09,431 INFO L93 Difference]: Finished difference Result 695 states and 836 transitions. [2021-11-20 06:52:09,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 06:52:09,434 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.8076923076923075) internal successors, (125), 26 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 68 [2021-11-20 06:52:09,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:52:09,436 INFO L225 Difference]: With dead ends: 695 [2021-11-20 06:52:09,436 INFO L226 Difference]: Without dead ends: 676 [2021-11-20 06:52:09,437 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=145, Invalid=725, Unknown=0, NotChecked=0, Total=870 [2021-11-20 06:52:09,437 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 72 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:52:09,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 490 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 282 Invalid, 0 Unknown, 32 Unchecked, 1.6s Time] [2021-11-20 06:52:09,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2021-11-20 06:52:09,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 671. [2021-11-20 06:52:09,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 671 states, 669 states have (on average 1.210762331838565) internal successors, (810), 670 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:52:09,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 810 transitions. [2021-11-20 06:52:09,448 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 810 transitions. Word has length 68 [2021-11-20 06:52:09,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:52:09,449 INFO L470 AbstractCegarLoop]: Abstraction has 671 states and 810 transitions. [2021-11-20 06:52:09,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.8076923076923075) internal successors, (125), 26 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) [2021-11-20 06:52:09,449 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 810 transitions. [2021-11-20 06:52:09,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-20 06:52:09,450 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:52:09,451 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:52:09,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2021-11-20 06:52:09,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:52:09,657 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-20 06:52:09,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:52:09,657 INFO L85 PathProgramCache]: Analyzing trace with hash 978909326, now seen corresponding path program 12 times [2021-11-20 06:52:09,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:52:09,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2122172914] [2021-11-20 06:52:09,658 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 06:52:09,658 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:52:09,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:52:09,659 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:52:09,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-11-20 06:52:09,893 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-11-20 06:52:09,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:52:09,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-20 06:52:09,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:52:09,928 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 [2021-11-20 06:52:11,356 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 32 proven. 85 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 06:52:11,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:52:16,091 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 06:52:16,091 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:52:16,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2122172914] [2021-11-20 06:52:16,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2122172914] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:52:16,092 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:52:16,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2021-11-20 06:52:16,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510553862] [2021-11-20 06:52:16,092 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:52:16,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-20 06:52:16,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:52:16,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-20 06:52:16,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-11-20 06:52:16,093 INFO L87 Difference]: Start difference. First operand 671 states and 810 transitions. Second operand has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:52:23,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:52:23,808 INFO L93 Difference]: Finished difference Result 1021 states and 1205 transitions. [2021-11-20 06:52:23,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-20 06:52:23,810 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-20 06:52:23,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:52:23,814 INFO L225 Difference]: With dead ends: 1021 [2021-11-20 06:52:23,814 INFO L226 Difference]: Without dead ends: 983 [2021-11-20 06:52:23,814 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=169, Invalid=1021, Unknown=0, NotChecked=0, Total=1190 [2021-11-20 06:52:23,814 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 141 mSDsluCounter, 670 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 729 SdHoareTripleChecker+Invalid, 784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 195 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:52:23,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 729 Invalid, 784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 565 Invalid, 0 Unknown, 195 Unchecked, 5.4s Time] [2021-11-20 06:52:23,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 983 states. [2021-11-20 06:52:23,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 983 to 641. [2021-11-20 06:52:23,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 641 states, 639 states have (on average 1.2112676056338028) internal successors, (774), 640 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:52:23,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 641 states to 641 states and 774 transitions. [2021-11-20 06:52:23,826 INFO L78 Accepts]: Start accepts. Automaton has 641 states and 774 transitions. Word has length 68 [2021-11-20 06:52:23,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:52:23,827 INFO L470 AbstractCegarLoop]: Abstraction has 641 states and 774 transitions. [2021-11-20 06:52:23,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:52:23,827 INFO L276 IsEmpty]: Start isEmpty. Operand 641 states and 774 transitions. [2021-11-20 06:52:23,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-20 06:52:23,829 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:52:23,829 INFO L514 BasicCegarLoop]: trace histogram [8, 6, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:52:23,840 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2021-11-20 06:52:24,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:52:24,029 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-20 06:52:24,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:52:24,030 INFO L85 PathProgramCache]: Analyzing trace with hash 1513394254, now seen corresponding path program 6 times [2021-11-20 06:52:24,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:52:24,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1602991709] [2021-11-20 06:52:24,031 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 06:52:24,031 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:52:24,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:52:24,032 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:52:24,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-11-20 06:52:24,267 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-11-20 06:52:24,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:52:24,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-20 06:52:24,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:52:24,298 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 [2021-11-20 06:52:25,584 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 32 proven. 98 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 06:52:25,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:52:30,400 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 130 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 06:52:30,400 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:52:30,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1602991709] [2021-11-20 06:52:30,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1602991709] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:52:30,400 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:52:30,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2021-11-20 06:52:30,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733077883] [2021-11-20 06:52:30,400 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:52:30,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-20 06:52:30,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:52:30,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-20 06:52:30,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-11-20 06:52:30,401 INFO L87 Difference]: Start difference. First operand 641 states and 774 transitions. Second operand has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:52:33,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:52:33,801 INFO L93 Difference]: Finished difference Result 912 states and 1081 transitions. [2021-11-20 06:52:33,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-20 06:52:33,802 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-20 06:52:33,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:52:33,805 INFO L225 Difference]: With dead ends: 912 [2021-11-20 06:52:33,806 INFO L226 Difference]: Without dead ends: 909 [2021-11-20 06:52:33,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=169, Invalid=1021, Unknown=0, NotChecked=0, Total=1190 [2021-11-20 06:52:33,806 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 65 mSDsluCounter, 692 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 739 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 196 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:52:33,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 739 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 284 Invalid, 0 Unknown, 196 Unchecked, 1.2s Time] [2021-11-20 06:52:33,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 909 states. [2021-11-20 06:52:33,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 909 to 623. [2021-11-20 06:52:33,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 623 states, 621 states have (on average 1.210950080515298) internal successors, (752), 622 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:52:33,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 752 transitions. [2021-11-20 06:52:33,814 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 752 transitions. Word has length 68 [2021-11-20 06:52:33,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:52:33,815 INFO L470 AbstractCegarLoop]: Abstraction has 623 states and 752 transitions. [2021-11-20 06:52:33,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:52:33,815 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 752 transitions. [2021-11-20 06:52:33,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-20 06:52:33,816 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:52:33,816 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:52:33,845 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (41)] Ended with exit code 0 [2021-11-20 06:52:34,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:52:34,029 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-20 06:52:34,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:52:34,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1554247346, now seen corresponding path program 13 times [2021-11-20 06:52:34,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:52:34,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1304669580] [2021-11-20 06:52:34,030 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 06:52:34,030 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:52:34,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:52:34,031 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:52:34,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2021-11-20 06:52:34,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:34,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-20 06:52:34,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:52:34,155 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 [2021-11-20 06:52:35,350 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 45 proven. 68 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 06:52:35,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:52:40,416 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 06:52:40,416 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:52:40,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1304669580] [2021-11-20 06:52:40,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1304669580] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:52:40,417 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:52:40,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 25 [2021-11-20 06:52:40,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323654324] [2021-11-20 06:52:40,417 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:52:40,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-20 06:52:40,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:52:40,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-20 06:52:40,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-11-20 06:52:40,418 INFO L87 Difference]: Start difference. First operand 623 states and 752 transitions. Second operand has 25 states, 25 states have (on average 5.0) internal successors, (125), 25 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) [2021-11-20 06:52:45,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:52:45,904 INFO L93 Difference]: Finished difference Result 735 states and 876 transitions. [2021-11-20 06:52:45,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-20 06:52:45,906 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.0) internal successors, (125), 25 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 68 [2021-11-20 06:52:45,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:52:45,909 INFO L225 Difference]: With dead ends: 735 [2021-11-20 06:52:45,909 INFO L226 Difference]: Without dead ends: 728 [2021-11-20 06:52:45,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 115 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=160, Invalid=1100, Unknown=0, NotChecked=0, Total=1260 [2021-11-20 06:52:45,910 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 69 mSDsluCounter, 598 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 638 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:52:45,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 638 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 231 Invalid, 0 Unknown, 52 Unchecked, 1.3s Time] [2021-11-20 06:52:45,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2021-11-20 06:52:45,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 655. [2021-11-20 06:52:45,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 655 states, 653 states have (on average 1.209800918836141) internal successors, (790), 654 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:52:45,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 790 transitions. [2021-11-20 06:52:45,919 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 790 transitions. Word has length 68 [2021-11-20 06:52:45,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:52:45,919 INFO L470 AbstractCegarLoop]: Abstraction has 655 states and 790 transitions. [2021-11-20 06:52:45,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.0) internal successors, (125), 25 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) [2021-11-20 06:52:45,919 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 790 transitions. [2021-11-20 06:52:45,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-20 06:52:45,920 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:52:45,920 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:52:45,939 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (42)] Ended with exit code 0 [2021-11-20 06:52:46,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:52:46,136 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-20 06:52:46,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:52:46,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1883902542, now seen corresponding path program 14 times [2021-11-20 06:52:46,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:52:46,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1541284362] [2021-11-20 06:52:46,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:52:46,137 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:52:46,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:52:46,138 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:52:46,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-11-20 06:52:46,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:52:46,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:52:46,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-20 06:52:46,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:52:46,253 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 [2021-11-20 06:52:47,445 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 45 proven. 67 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 06:52:47,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:52:52,418 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 116 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 06:52:52,419 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:52:52,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1541284362] [2021-11-20 06:52:52,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1541284362] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:52:52,419 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:52:52,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 25 [2021-11-20 06:52:52,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016425389] [2021-11-20 06:52:52,419 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:52:52,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-20 06:52:52,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:52:52,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-20 06:52:52,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-11-20 06:52:52,420 INFO L87 Difference]: Start difference. First operand 655 states and 790 transitions. Second operand has 25 states, 25 states have (on average 5.0) internal successors, (125), 25 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) [2021-11-20 06:52:55,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:52:55,146 INFO L93 Difference]: Finished difference Result 796 states and 950 transitions. [2021-11-20 06:52:55,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-20 06:52:55,148 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.0) internal successors, (125), 25 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 68 [2021-11-20 06:52:55,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:52:55,151 INFO L225 Difference]: With dead ends: 796 [2021-11-20 06:52:55,151 INFO L226 Difference]: Without dead ends: 792 [2021-11-20 06:52:55,152 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=131, Invalid=799, Unknown=0, NotChecked=0, Total=930 [2021-11-20 06:52:55,152 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 79 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:52:55,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 476 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 229 Invalid, 0 Unknown, 26 Unchecked, 1.5s Time] [2021-11-20 06:52:55,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 792 states. [2021-11-20 06:52:55,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 792 to 713. [2021-11-20 06:52:55,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 711 states have (on average 1.2081575246132208) internal successors, (859), 712 states have internal predecessors, (859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:52:55,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 859 transitions. [2021-11-20 06:52:55,161 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 859 transitions. Word has length 68 [2021-11-20 06:52:55,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:52:55,161 INFO L470 AbstractCegarLoop]: Abstraction has 713 states and 859 transitions. [2021-11-20 06:52:55,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.0) internal successors, (125), 25 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) [2021-11-20 06:52:55,161 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 859 transitions. [2021-11-20 06:52:55,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-20 06:52:55,162 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:52:55,162 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:52:55,170 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2021-11-20 06:52:55,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:52:55,363 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-20 06:52:55,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:52:55,363 INFO L85 PathProgramCache]: Analyzing trace with hash -718267890, now seen corresponding path program 15 times [2021-11-20 06:52:55,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:52:55,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [991375348] [2021-11-20 06:52:55,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:52:55,364 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:52:55,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:52:55,365 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:52:55,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2021-11-20 06:52:55,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-20 06:52:55,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:52:55,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-20 06:52:55,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:52:55,524 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 [2021-11-20 06:52:56,833 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 32 proven. 85 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 06:52:56,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:53:01,652 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 06:53:01,652 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:53:01,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [991375348] [2021-11-20 06:53:01,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [991375348] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:53:01,653 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:53:01,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2021-11-20 06:53:01,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356596984] [2021-11-20 06:53:01,653 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:53:01,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-20 06:53:01,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:53:01,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-20 06:53:01,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-11-20 06:53:01,655 INFO L87 Difference]: Start difference. First operand 713 states and 859 transitions. Second operand has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:53:07,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:53:07,616 INFO L93 Difference]: Finished difference Result 847 states and 1006 transitions. [2021-11-20 06:53:07,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-20 06:53:07,618 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-20 06:53:07,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:53:07,621 INFO L225 Difference]: With dead ends: 847 [2021-11-20 06:53:07,621 INFO L226 Difference]: Without dead ends: 775 [2021-11-20 06:53:07,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=169, Invalid=1021, Unknown=0, NotChecked=0, Total=1190 [2021-11-20 06:53:07,621 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 121 mSDsluCounter, 597 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 650 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-11-20 06:53:07,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 650 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 469 Invalid, 0 Unknown, 85 Unchecked, 3.8s Time] [2021-11-20 06:53:07,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2021-11-20 06:53:07,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 601. [2021-11-20 06:53:07,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 599 states have (on average 1.2120200333889817) internal successors, (726), 600 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:53:07,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 726 transitions. [2021-11-20 06:53:07,632 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 726 transitions. Word has length 68 [2021-11-20 06:53:07,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:53:07,632 INFO L470 AbstractCegarLoop]: Abstraction has 601 states and 726 transitions. [2021-11-20 06:53:07,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:53:07,633 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 726 transitions. [2021-11-20 06:53:07,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-20 06:53:07,634 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:53:07,634 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:53:07,648 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2021-11-20 06:53:07,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:53:07,845 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-20 06:53:07,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:53:07,845 INFO L85 PathProgramCache]: Analyzing trace with hash 477616526, now seen corresponding path program 16 times [2021-11-20 06:53:07,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:53:07,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [13429787] [2021-11-20 06:53:07,846 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 06:53:07,846 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:53:07,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:53:07,846 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:53:07,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2021-11-20 06:53:07,935 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 06:53:07,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:53:07,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-20 06:53:07,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:53:07,967 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 [2021-11-20 06:53:09,180 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 45 proven. 67 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 06:53:09,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:53:14,338 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 116 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 06:53:14,339 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:53:14,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [13429787] [2021-11-20 06:53:14,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [13429787] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:53:14,339 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:53:14,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 25 [2021-11-20 06:53:14,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39707694] [2021-11-20 06:53:14,339 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:53:14,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-20 06:53:14,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:53:14,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-20 06:53:14,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-11-20 06:53:14,340 INFO L87 Difference]: Start difference. First operand 601 states and 726 transitions. Second operand has 25 states, 25 states have (on average 5.0) internal successors, (125), 25 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) [2021-11-20 06:53:16,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:53:16,455 INFO L93 Difference]: Finished difference Result 675 states and 811 transitions. [2021-11-20 06:53:16,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-20 06:53:16,456 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.0) internal successors, (125), 25 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 68 [2021-11-20 06:53:16,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:53:16,459 INFO L225 Difference]: With dead ends: 675 [2021-11-20 06:53:16,459 INFO L226 Difference]: Without dead ends: 660 [2021-11-20 06:53:16,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2021-11-20 06:53:16,459 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 51 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 604 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:53:16,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 604 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 252 Invalid, 0 Unknown, 69 Unchecked, 1.6s Time] [2021-11-20 06:53:16,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2021-11-20 06:53:16,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 629. [2021-11-20 06:53:16,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 627 states have (on average 1.215311004784689) internal successors, (762), 628 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:53:16,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 762 transitions. [2021-11-20 06:53:16,469 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 762 transitions. Word has length 68 [2021-11-20 06:53:16,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:53:16,469 INFO L470 AbstractCegarLoop]: Abstraction has 629 states and 762 transitions. [2021-11-20 06:53:16,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.0) internal successors, (125), 25 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) [2021-11-20 06:53:16,469 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 762 transitions. [2021-11-20 06:53:16,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-20 06:53:16,470 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:53:16,471 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:53:16,483 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2021-11-20 06:53:16,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:53:16,677 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-20 06:53:16,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:53:16,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1255599794, now seen corresponding path program 17 times [2021-11-20 06:53:16,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:53:16,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1155060719] [2021-11-20 06:53:16,677 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 06:53:16,678 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:53:16,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:53:16,678 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:53:16,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2021-11-20 06:53:16,928 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-11-20 06:53:16,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:53:16,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-20 06:53:16,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:53:16,967 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 [2021-11-20 06:53:18,178 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 45 proven. 68 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 06:53:18,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:53:23,549 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 06:53:23,549 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:53:23,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1155060719] [2021-11-20 06:53:23,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1155060719] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:53:23,550 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:53:23,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2021-11-20 06:53:23,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073657714] [2021-11-20 06:53:23,551 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:53:23,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-20 06:53:23,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:53:23,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-20 06:53:23,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2021-11-20 06:53:23,552 INFO L87 Difference]: Start difference. First operand 629 states and 762 transitions. Second operand has 26 states, 26 states have (on average 4.8076923076923075) internal successors, (125), 26 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) [2021-11-20 06:53:27,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:53:27,902 INFO L93 Difference]: Finished difference Result 710 states and 855 transitions. [2021-11-20 06:53:27,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-20 06:53:27,904 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.8076923076923075) internal successors, (125), 26 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 68 [2021-11-20 06:53:27,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:53:27,907 INFO L225 Difference]: With dead ends: 710 [2021-11-20 06:53:27,907 INFO L226 Difference]: Without dead ends: 703 [2021-11-20 06:53:27,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=163, Invalid=893, Unknown=0, NotChecked=0, Total=1056 [2021-11-20 06:53:27,907 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 100 mSDsluCounter, 540 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 133 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-20 06:53:27,908 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 578 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 365 Invalid, 0 Unknown, 133 Unchecked, 2.8s Time] [2021-11-20 06:53:27,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2021-11-20 06:53:27,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 644. [2021-11-20 06:53:27,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644 states, 642 states have (on average 1.2165109034267914) internal successors, (781), 643 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:53:27,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 781 transitions. [2021-11-20 06:53:27,915 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 781 transitions. Word has length 68 [2021-11-20 06:53:27,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:53:27,915 INFO L470 AbstractCegarLoop]: Abstraction has 644 states and 781 transitions. [2021-11-20 06:53:27,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.8076923076923075) internal successors, (125), 26 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) [2021-11-20 06:53:27,916 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 781 transitions. [2021-11-20 06:53:27,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-20 06:53:27,917 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:53:27,917 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:53:27,944 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (46)] Ended with exit code 0 [2021-11-20 06:53:28,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:53:28,130 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-20 06:53:28,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:53:28,131 INFO L85 PathProgramCache]: Analyzing trace with hash -28274098, now seen corresponding path program 18 times [2021-11-20 06:53:28,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:53:28,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1142485548] [2021-11-20 06:53:28,131 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 06:53:28,131 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:53:28,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:53:28,132 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:53:28,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2021-11-20 06:53:28,294 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-11-20 06:53:28,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:53:28,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-20 06:53:28,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:53:28,322 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 [2021-11-20 06:53:29,553 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-20 06:53:29,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:53:34,382 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-20 06:53:34,382 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:53:34,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1142485548] [2021-11-20 06:53:34,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1142485548] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:53:34,382 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:53:34,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-11-20 06:53:34,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727929195] [2021-11-20 06:53:34,383 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:53:34,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-20 06:53:34,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:53:34,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-20 06:53:34,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2021-11-20 06:53:34,384 INFO L87 Difference]: Start difference. First operand 644 states and 781 transitions. Second operand has 22 states, 21 states have (on average 5.333333333333333) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:53:40,783 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 [] [2021-11-20 06:53:45,621 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:53:49,814 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:53:52,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:53:52,130 INFO L93 Difference]: Finished difference Result 888 states and 1064 transitions. [2021-11-20 06:53:52,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-20 06:53:52,131 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 5.333333333333333) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-20 06:53:52,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:53:52,134 INFO L225 Difference]: With dead ends: 888 [2021-11-20 06:53:52,134 INFO L226 Difference]: Without dead ends: 870 [2021-11-20 06:53:52,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=617, Invalid=1545, Unknown=0, NotChecked=0, Total=2162 [2021-11-20 06:53:52,135 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 579 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 28 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 579 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:53:52,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [579 Valid, 474 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 416 Invalid, 3 Unknown, 100 Unchecked, 8.3s Time] [2021-11-20 06:53:52,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 870 states. [2021-11-20 06:53:52,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 870 to 626. [2021-11-20 06:53:52,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 626 states, 624 states have (on average 1.1971153846153846) internal successors, (747), 625 states have internal predecessors, (747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:53:52,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 747 transitions. [2021-11-20 06:53:52,142 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 747 transitions. Word has length 68 [2021-11-20 06:53:52,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:53:52,143 INFO L470 AbstractCegarLoop]: Abstraction has 626 states and 747 transitions. [2021-11-20 06:53:52,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 5.333333333333333) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:53:52,143 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 747 transitions. [2021-11-20 06:53:52,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-20 06:53:52,144 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:53:52,144 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:53:52,152 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2021-11-20 06:53:52,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:53:52,344 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-20 06:53:52,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:53:52,345 INFO L85 PathProgramCache]: Analyzing trace with hash 625249264, now seen corresponding path program 6 times [2021-11-20 06:53:52,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:53:52,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1097367934] [2021-11-20 06:53:52,345 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 06:53:52,345 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:53:52,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:53:52,346 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:53:52,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2021-11-20 06:53:52,673 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-11-20 06:53:52,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:53:52,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-20 06:53:52,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:53:52,721 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 [2021-11-20 06:53:56,047 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 260 proven. 28 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-20 06:53:56,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:54:18,853 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 228 proven. 60 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-20 06:54:18,853 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:54:18,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1097367934] [2021-11-20 06:54:18,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1097367934] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:54:18,854 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:54:18,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-11-20 06:54:18,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193818339] [2021-11-20 06:54:18,854 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:54:18,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-20 06:54:18,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:54:18,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-20 06:54:18,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1049, Unknown=0, NotChecked=0, Total=1260 [2021-11-20 06:54:18,855 INFO L87 Difference]: Start difference. First operand 626 states and 747 transitions. Second operand has 36 states, 36 states have (on average 3.0833333333333335) internal successors, (111), 36 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:26,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:54:26,088 INFO L93 Difference]: Finished difference Result 663 states and 791 transitions. [2021-11-20 06:54:26,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-20 06:54:26,090 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.0833333333333335) internal successors, (111), 36 states have internal predecessors, (111), 0 states have call successors, (0), 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 90 [2021-11-20 06:54:26,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:54:26,093 INFO L225 Difference]: With dead ends: 663 [2021-11-20 06:54:26,093 INFO L226 Difference]: Without dead ends: 660 [2021-11-20 06:54:26,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 23.1s TimeCoverageRelationStatistics Valid=248, Invalid=1234, Unknown=0, NotChecked=0, Total=1482 [2021-11-20 06:54:26,094 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 88 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 173 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:54:26,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 425 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 128 Invalid, 0 Unknown, 173 Unchecked, 0.6s Time] [2021-11-20 06:54:26,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2021-11-20 06:54:26,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 650. [2021-11-20 06:54:26,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 650 states, 648 states have (on average 1.2006172839506173) internal successors, (778), 649 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:26,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 778 transitions. [2021-11-20 06:54:26,102 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 778 transitions. Word has length 90 [2021-11-20 06:54:26,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:54:26,102 INFO L470 AbstractCegarLoop]: Abstraction has 650 states and 778 transitions. [2021-11-20 06:54:26,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.0833333333333335) internal successors, (111), 36 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:26,102 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 778 transitions. [2021-11-20 06:54:26,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-20 06:54:26,103 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:54:26,103 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:54:26,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2021-11-20 06:54:26,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:54:26,304 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-20 06:54:26,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:54:26,304 INFO L85 PathProgramCache]: Analyzing trace with hash -132332109, now seen corresponding path program 7 times [2021-11-20 06:54:26,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:54:26,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2081779390] [2021-11-20 06:54:26,304 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 06:54:26,305 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:54:26,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:54:26,305 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:54:26,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_367c9bf7-3997-4389-bce8-6e33a2dd62cf/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2021-11-20 06:54:26,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:26,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-20 06:54:26,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:54:26,509 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 [2021-11-20 06:54:29,606 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 176 proven. 185 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-20 06:54:29,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:54:43,193 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 0 proven. 397 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:54:43,194 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:54:43,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2081779390] [2021-11-20 06:54:43,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2081779390] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:54:43,194 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:54:43,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22] total 39 [2021-11-20 06:54:43,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407086861] [2021-11-20 06:54:43,194 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:54:43,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-20 06:54:43,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:54:43,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-20 06:54:43,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1301, Unknown=0, NotChecked=0, Total=1482 [2021-11-20 06:54:43,195 INFO L87 Difference]: Start difference. First operand 650 states and 778 transitions. Second operand has 39 states, 39 states have (on average 4.333333333333333) internal successors, (169), 39 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)