./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/forester-heap/dll-circular-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/forester-heap/dll-circular-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt --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 d7d859c146e69673ad9c70e998d47ea3e35bbb83 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/forester-heap/dll-circular-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt --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 d7d859c146e69673ad9c70e998d47ea3e35bbb83 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 00:51:01,530 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 00:51:01,533 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 00:51:01,586 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 00:51:01,586 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 00:51:01,588 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 00:51:01,590 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 00:51:01,592 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 00:51:01,594 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 00:51:01,595 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 00:51:01,596 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 00:51:01,598 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 00:51:01,599 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 00:51:01,600 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 00:51:01,602 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 00:51:01,603 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 00:51:01,605 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 00:51:01,607 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 00:51:01,609 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 00:51:01,617 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 00:51:01,619 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 00:51:01,621 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 00:51:01,627 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 00:51:01,628 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 00:51:01,637 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 00:51:01,637 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 00:51:01,638 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 00:51:01,640 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 00:51:01,640 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 00:51:01,642 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 00:51:01,642 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 00:51:01,643 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 00:51:01,646 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 00:51:01,647 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 00:51:01,648 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 00:51:01,649 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 00:51:01,650 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 00:51:01,650 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 00:51:01,650 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 00:51:01,651 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 00:51:01,652 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 00:51:01,653 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-10-13 00:51:01,682 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 00:51:01,682 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 00:51:01,683 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-13 00:51:01,683 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-13 00:51:01,684 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 00:51:01,684 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 00:51:01,685 INFO L138 SettingsManager]: * Use SBE=true [2021-10-13 00:51:01,685 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 00:51:01,685 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 00:51:01,686 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-13 00:51:01,686 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 00:51:01,686 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 00:51:01,686 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 00:51:01,686 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-13 00:51:01,687 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-13 00:51:01,687 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-13 00:51:01,687 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 00:51:01,687 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 00:51:01,688 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 00:51:01,688 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 00:51:01,688 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 00:51:01,688 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 00:51:01,689 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 00:51:01,689 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 00:51:01,689 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 00:51:01,689 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 00:51:01,690 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-13 00:51:01,690 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 00:51:01,690 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 00:51:01,690 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_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d7d859c146e69673ad9c70e998d47ea3e35bbb83 [2021-10-13 00:51:01,978 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 00:51:02,004 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 00:51:02,008 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 00:51:02,010 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 00:51:02,012 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 00:51:02,013 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/../../sv-benchmarks/c/forester-heap/dll-circular-2.i [2021-10-13 00:51:02,094 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/data/2c39fc28f/61e77ba0435c4e6ca3248fb17f0ed0f6/FLAGd98db0d0d [2021-10-13 00:51:02,757 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 00:51:02,758 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/sv-benchmarks/c/forester-heap/dll-circular-2.i [2021-10-13 00:51:02,773 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/data/2c39fc28f/61e77ba0435c4e6ca3248fb17f0ed0f6/FLAGd98db0d0d [2021-10-13 00:51:03,073 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/data/2c39fc28f/61e77ba0435c4e6ca3248fb17f0ed0f6 [2021-10-13 00:51:03,081 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 00:51:03,082 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-13 00:51:03,084 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 00:51:03,085 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 00:51:03,088 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 00:51:03,088 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:51:03" (1/1) ... [2021-10-13 00:51:03,089 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57bb9c16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:51:03, skipping insertion in model container [2021-10-13 00:51:03,090 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:51:03" (1/1) ... [2021-10-13 00:51:03,101 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 00:51:03,158 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 00:51:03,497 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/sv-benchmarks/c/forester-heap/dll-circular-2.i[22391,22404] [2021-10-13 00:51:03,506 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/sv-benchmarks/c/forester-heap/dll-circular-2.i[22497,22510] [2021-10-13 00:51:03,511 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/sv-benchmarks/c/forester-heap/dll-circular-2.i[22622,22635] [2021-10-13 00:51:03,527 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 00:51:03,540 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 00:51:03,610 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/sv-benchmarks/c/forester-heap/dll-circular-2.i[22391,22404] [2021-10-13 00:51:03,616 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/sv-benchmarks/c/forester-heap/dll-circular-2.i[22497,22510] [2021-10-13 00:51:03,618 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/sv-benchmarks/c/forester-heap/dll-circular-2.i[22622,22635] [2021-10-13 00:51:03,620 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 00:51:03,653 INFO L208 MainTranslator]: Completed translation [2021-10-13 00:51:03,653 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:51:03 WrapperNode [2021-10-13 00:51:03,654 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 00:51:03,655 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 00:51:03,655 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 00:51:03,655 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 00:51:03,667 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:51:03" (1/1) ... [2021-10-13 00:51:03,667 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:51:03" (1/1) ... [2021-10-13 00:51:03,684 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:51:03" (1/1) ... [2021-10-13 00:51:03,697 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:51:03" (1/1) ... [2021-10-13 00:51:03,714 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:51:03" (1/1) ... [2021-10-13 00:51:03,720 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:51:03" (1/1) ... [2021-10-13 00:51:03,724 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:51:03" (1/1) ... [2021-10-13 00:51:03,731 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 00:51:03,732 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 00:51:03,732 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 00:51:03,732 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 00:51:03,733 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:51:03" (1/1) ... [2021-10-13 00:51:03,746 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 00:51:03,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:51:03,780 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 00:51:03,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 00:51:03,820 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-13 00:51:03,821 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 00:51:03,821 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-10-13 00:51:03,821 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-13 00:51:03,821 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-13 00:51:03,821 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-13 00:51:03,821 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-13 00:51:03,822 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-13 00:51:03,822 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-13 00:51:03,822 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-13 00:51:03,822 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-13 00:51:03,822 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-13 00:51:03,822 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-13 00:51:03,823 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-13 00:51:03,823 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-13 00:51:03,823 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-13 00:51:03,823 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-13 00:51:03,823 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-13 00:51:03,823 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-13 00:51:03,823 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-13 00:51:03,824 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-13 00:51:03,824 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-13 00:51:03,824 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-13 00:51:03,824 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-13 00:51:03,824 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-13 00:51:03,824 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-13 00:51:03,824 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-13 00:51:03,825 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-13 00:51:03,825 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-13 00:51:03,825 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-13 00:51:03,825 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-13 00:51:03,825 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-13 00:51:03,825 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-13 00:51:03,826 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-13 00:51:03,826 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-13 00:51:03,826 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-13 00:51:03,826 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-13 00:51:03,826 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-13 00:51:03,826 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-13 00:51:03,826 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-13 00:51:03,827 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-13 00:51:03,827 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-13 00:51:03,827 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-13 00:51:03,827 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-13 00:51:03,827 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-13 00:51:03,827 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-13 00:51:03,827 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-13 00:51:03,828 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-13 00:51:03,828 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-13 00:51:03,828 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-13 00:51:03,828 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-13 00:51:03,828 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-13 00:51:03,828 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-13 00:51:03,828 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-13 00:51:03,828 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-13 00:51:03,829 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-13 00:51:03,829 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-13 00:51:03,829 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-13 00:51:03,829 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-10-13 00:51:03,829 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-13 00:51:03,830 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-13 00:51:03,830 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-13 00:51:03,831 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-13 00:51:03,832 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-13 00:51:03,832 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-13 00:51:03,833 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-13 00:51:03,833 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-13 00:51:03,833 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-13 00:51:03,833 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-13 00:51:03,833 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-13 00:51:03,834 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-13 00:51:03,834 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-13 00:51:03,834 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-13 00:51:03,834 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-13 00:51:03,834 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-13 00:51:03,835 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-13 00:51:03,835 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-13 00:51:03,835 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-13 00:51:03,836 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-13 00:51:03,836 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-13 00:51:03,836 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-13 00:51:03,836 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-13 00:51:03,836 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-13 00:51:03,836 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-13 00:51:03,836 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-13 00:51:03,837 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-13 00:51:03,837 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-13 00:51:03,837 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-13 00:51:03,837 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-13 00:51:03,837 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-13 00:51:03,837 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-13 00:51:03,838 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-13 00:51:03,838 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-13 00:51:03,838 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-13 00:51:03,838 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-13 00:51:03,838 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-13 00:51:03,838 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-13 00:51:03,838 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-13 00:51:03,839 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-13 00:51:03,839 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-13 00:51:03,839 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-13 00:51:03,839 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-13 00:51:03,839 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-13 00:51:03,840 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-13 00:51:03,840 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-13 00:51:03,840 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-13 00:51:03,840 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-13 00:51:03,840 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-13 00:51:03,840 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-10-13 00:51:03,840 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-10-13 00:51:03,841 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-10-13 00:51:03,841 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-10-13 00:51:03,841 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 00:51:03,841 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-13 00:51:03,841 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 00:51:03,841 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-13 00:51:03,841 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-13 00:51:03,842 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-13 00:51:03,842 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-13 00:51:03,842 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 00:51:03,842 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-13 00:51:03,842 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 00:51:03,843 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 00:51:04,507 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 00:51:04,507 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-10-13 00:51:04,510 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:51:04 BoogieIcfgContainer [2021-10-13 00:51:04,510 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 00:51:04,512 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 00:51:04,512 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 00:51:04,517 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 00:51:04,517 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 12:51:03" (1/3) ... [2021-10-13 00:51:04,518 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6dbe50e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:51:04, skipping insertion in model container [2021-10-13 00:51:04,519 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:51:03" (2/3) ... [2021-10-13 00:51:04,519 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6dbe50e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:51:04, skipping insertion in model container [2021-10-13 00:51:04,519 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:51:04" (3/3) ... [2021-10-13 00:51:04,521 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-circular-2.i [2021-10-13 00:51:04,527 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 00:51:04,528 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 52 error locations. [2021-10-13 00:51:04,579 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 00:51:04,587 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, mConcurrency=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 [2021-10-13 00:51:04,588 INFO L340 AbstractCegarLoop]: Starting to check reachability of 52 error locations. [2021-10-13 00:51:04,621 INFO L276 IsEmpty]: Start isEmpty. Operand has 117 states, 60 states have (on average 2.183333333333333) internal successors, (131), 112 states have internal predecessors, (131), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-13 00:51:04,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-13 00:51:04,634 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:51:04,634 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:51:04,635 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 47 more)] === [2021-10-13 00:51:04,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:51:04,643 INFO L82 PathProgramCache]: Analyzing trace with hash -1390525095, now seen corresponding path program 1 times [2021-10-13 00:51:04,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:51:04,658 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260992784] [2021-10-13 00:51:04,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:51:04,659 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:51:04,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:51:04,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:51:04,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:51:04,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:51:04,938 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:51:04,938 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260992784] [2021-10-13 00:51:04,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260992784] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:51:04,939 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:51:04,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 00:51:04,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989048673] [2021-10-13 00:51:04,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 00:51:04,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:51:04,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 00:51:04,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:51:04,974 INFO L87 Difference]: Start difference. First operand has 117 states, 60 states have (on average 2.183333333333333) internal successors, (131), 112 states have internal predecessors, (131), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:05,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:51:05,350 INFO L93 Difference]: Finished difference Result 122 states and 129 transitions. [2021-10-13 00:51:05,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 00:51:05,352 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 7 [2021-10-13 00:51:05,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:51:05,364 INFO L225 Difference]: With dead ends: 122 [2021-10-13 00:51:05,364 INFO L226 Difference]: Without dead ends: 119 [2021-10-13 00:51:05,366 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.9ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:51:05,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-10-13 00:51:05,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 109. [2021-10-13 00:51:05,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 59 states have (on average 1.8983050847457628) internal successors, (112), 105 states have internal predecessors, (112), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:05,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 115 transitions. [2021-10-13 00:51:05,434 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 115 transitions. Word has length 7 [2021-10-13 00:51:05,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:51:05,434 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 115 transitions. [2021-10-13 00:51:05,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:05,435 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 115 transitions. [2021-10-13 00:51:05,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-13 00:51:05,436 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:51:05,436 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:51:05,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 00:51:05,437 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 47 more)] === [2021-10-13 00:51:05,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:51:05,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1390525094, now seen corresponding path program 1 times [2021-10-13 00:51:05,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:51:05,440 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541583921] [2021-10-13 00:51:05,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:51:05,440 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:51:05,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:51:05,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:51:05,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:51:05,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:51:05,618 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:51:05,618 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541583921] [2021-10-13 00:51:05,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541583921] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:51:05,619 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:51:05,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 00:51:05,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918144242] [2021-10-13 00:51:05,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 00:51:05,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:51:05,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 00:51:05,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:51:05,629 INFO L87 Difference]: Start difference. First operand 109 states and 115 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:05,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:51:05,885 INFO L93 Difference]: Finished difference Result 116 states and 122 transitions. [2021-10-13 00:51:05,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 00:51:05,885 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 7 [2021-10-13 00:51:05,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:51:05,887 INFO L225 Difference]: With dead ends: 116 [2021-10-13 00:51:05,887 INFO L226 Difference]: Without dead ends: 116 [2021-10-13 00:51:05,888 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.7ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:51:05,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-10-13 00:51:05,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 104. [2021-10-13 00:51:05,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 59 states have (on average 1.8135593220338984) internal successors, (107), 100 states have internal predecessors, (107), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:05,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 110 transitions. [2021-10-13 00:51:05,897 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 110 transitions. Word has length 7 [2021-10-13 00:51:05,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:51:05,897 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 110 transitions. [2021-10-13 00:51:05,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:05,898 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 110 transitions. [2021-10-13 00:51:05,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-13 00:51:05,898 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:51:05,898 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:51:05,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-13 00:51:05,899 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr19REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 47 more)] === [2021-10-13 00:51:05,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:51:05,900 INFO L82 PathProgramCache]: Analyzing trace with hash 852778048, now seen corresponding path program 1 times [2021-10-13 00:51:05,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:51:05,900 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050852767] [2021-10-13 00:51:05,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:51:05,900 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:51:05,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:51:05,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:51:05,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:51:05,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:51:05,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:51:05,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050852767] [2021-10-13 00:51:05,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050852767] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:51:05,977 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:51:05,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 00:51:05,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141648742] [2021-10-13 00:51:05,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 00:51:05,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:51:06,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 00:51:06,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:51:06,015 INFO L87 Difference]: Start difference. First operand 104 states and 110 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:06,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:51:06,285 INFO L93 Difference]: Finished difference Result 101 states and 108 transitions. [2021-10-13 00:51:06,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 00:51:06,285 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-10-13 00:51:06,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:51:06,286 INFO L225 Difference]: With dead ends: 101 [2021-10-13 00:51:06,287 INFO L226 Difference]: Without dead ends: 101 [2021-10-13 00:51:06,287 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.6ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 00:51:06,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-10-13 00:51:06,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 92. [2021-10-13 00:51:06,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 59 states have (on average 1.6101694915254237) internal successors, (95), 88 states have internal predecessors, (95), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:06,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 98 transitions. [2021-10-13 00:51:06,294 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 98 transitions. Word has length 13 [2021-10-13 00:51:06,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:51:06,294 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 98 transitions. [2021-10-13 00:51:06,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:06,295 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 98 transitions. [2021-10-13 00:51:06,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-13 00:51:06,295 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:51:06,295 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:51:06,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-13 00:51:06,296 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr20REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 47 more)] === [2021-10-13 00:51:06,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:51:06,296 INFO L82 PathProgramCache]: Analyzing trace with hash 852778049, now seen corresponding path program 1 times [2021-10-13 00:51:06,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:51:06,297 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477532804] [2021-10-13 00:51:06,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:51:06,297 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:51:06,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:51:06,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:51:06,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:51:06,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:51:06,379 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:51:06,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477532804] [2021-10-13 00:51:06,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477532804] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:51:06,380 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:51:06,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 00:51:06,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608705306] [2021-10-13 00:51:06,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 00:51:06,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:51:06,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 00:51:06,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:51:06,382 INFO L87 Difference]: Start difference. First operand 92 states and 98 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:06,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:51:06,614 INFO L93 Difference]: Finished difference Result 117 states and 124 transitions. [2021-10-13 00:51:06,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 00:51:06,615 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-10-13 00:51:06,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:51:06,616 INFO L225 Difference]: With dead ends: 117 [2021-10-13 00:51:06,616 INFO L226 Difference]: Without dead ends: 117 [2021-10-13 00:51:06,617 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.4ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 00:51:06,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-10-13 00:51:06,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 101. [2021-10-13 00:51:06,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 68 states have (on average 1.5735294117647058) internal successors, (107), 97 states have internal predecessors, (107), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:06,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 110 transitions. [2021-10-13 00:51:06,624 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 110 transitions. Word has length 13 [2021-10-13 00:51:06,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:51:06,625 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 110 transitions. [2021-10-13 00:51:06,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:06,625 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 110 transitions. [2021-10-13 00:51:06,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 00:51:06,626 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:51:06,626 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:51:06,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-13 00:51:06,626 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr10REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 47 more)] === [2021-10-13 00:51:06,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:51:06,627 INFO L82 PathProgramCache]: Analyzing trace with hash 379334724, now seen corresponding path program 1 times [2021-10-13 00:51:06,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:51:06,627 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370033662] [2021-10-13 00:51:06,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:51:06,628 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:51:06,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:51:06,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:51:06,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:51:06,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:51:06,710 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:51:06,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370033662] [2021-10-13 00:51:06,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370033662] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:51:06,711 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:51:06,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-13 00:51:06,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246249543] [2021-10-13 00:51:06,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 00:51:06,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:51:06,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 00:51:06,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-13 00:51:06,713 INFO L87 Difference]: Start difference. First operand 101 states and 110 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:06,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:51:06,915 INFO L93 Difference]: Finished difference Result 100 states and 108 transitions. [2021-10-13 00:51:06,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 00:51:06,916 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-10-13 00:51:06,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:51:06,916 INFO L225 Difference]: With dead ends: 100 [2021-10-13 00:51:06,917 INFO L226 Difference]: Without dead ends: 100 [2021-10-13 00:51:06,917 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 38.7ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-10-13 00:51:06,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-10-13 00:51:06,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2021-10-13 00:51:06,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 68 states have (on average 1.5441176470588236) internal successors, (105), 96 states have internal predecessors, (105), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:06,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 108 transitions. [2021-10-13 00:51:06,923 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 108 transitions. Word has length 16 [2021-10-13 00:51:06,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:51:06,923 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 108 transitions. [2021-10-13 00:51:06,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:06,924 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 108 transitions. [2021-10-13 00:51:06,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 00:51:06,925 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:51:06,925 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:51:06,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-13 00:51:06,925 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr11REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 47 more)] === [2021-10-13 00:51:06,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:51:06,926 INFO L82 PathProgramCache]: Analyzing trace with hash 379334725, now seen corresponding path program 1 times [2021-10-13 00:51:06,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:51:06,926 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924362924] [2021-10-13 00:51:06,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:51:06,926 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:51:06,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:51:07,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:51:07,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:51:07,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:51:07,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:51:07,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924362924] [2021-10-13 00:51:07,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924362924] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:51:07,066 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:51:07,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-13 00:51:07,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732704198] [2021-10-13 00:51:07,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 00:51:07,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:51:07,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 00:51:07,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-13 00:51:07,068 INFO L87 Difference]: Start difference. First operand 100 states and 108 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:07,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:51:07,292 INFO L93 Difference]: Finished difference Result 99 states and 106 transitions. [2021-10-13 00:51:07,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 00:51:07,293 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-10-13 00:51:07,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:51:07,295 INFO L225 Difference]: With dead ends: 99 [2021-10-13 00:51:07,295 INFO L226 Difference]: Without dead ends: 99 [2021-10-13 00:51:07,302 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 62.3ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-10-13 00:51:07,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-10-13 00:51:07,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2021-10-13 00:51:07,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 68 states have (on average 1.5147058823529411) internal successors, (103), 95 states have internal predecessors, (103), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:07,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 106 transitions. [2021-10-13 00:51:07,315 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 106 transitions. Word has length 16 [2021-10-13 00:51:07,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:51:07,316 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 106 transitions. [2021-10-13 00:51:07,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:07,317 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 106 transitions. [2021-10-13 00:51:07,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-13 00:51:07,318 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:51:07,319 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:51:07,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-13 00:51:07,319 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr23ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 47 more)] === [2021-10-13 00:51:07,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:51:07,323 INFO L82 PathProgramCache]: Analyzing trace with hash -1125523357, now seen corresponding path program 1 times [2021-10-13 00:51:07,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:51:07,324 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923309442] [2021-10-13 00:51:07,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:51:07,325 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:51:07,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:51:07,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:51:07,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:51:07,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:51:07,577 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:51:07,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923309442] [2021-10-13 00:51:07,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923309442] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:51:07,578 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:51:07,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-13 00:51:07,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840722385] [2021-10-13 00:51:07,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-13 00:51:07,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:51:07,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-13 00:51:07,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-10-13 00:51:07,580 INFO L87 Difference]: Start difference. First operand 99 states and 106 transitions. Second operand has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 8 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:07,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:51:07,890 INFO L93 Difference]: Finished difference Result 182 states and 193 transitions. [2021-10-13 00:51:07,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-13 00:51:07,891 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 8 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-10-13 00:51:07,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:51:07,892 INFO L225 Difference]: With dead ends: 182 [2021-10-13 00:51:07,892 INFO L226 Difference]: Without dead ends: 182 [2021-10-13 00:51:07,893 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 135.6ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-10-13 00:51:07,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-10-13 00:51:07,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 102. [2021-10-13 00:51:07,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 71 states have (on average 1.4929577464788732) internal successors, (106), 98 states have internal predecessors, (106), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:07,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 109 transitions. [2021-10-13 00:51:07,898 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 109 transitions. Word has length 17 [2021-10-13 00:51:07,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:51:07,898 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 109 transitions. [2021-10-13 00:51:07,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 8 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:07,898 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 109 transitions. [2021-10-13 00:51:07,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-13 00:51:07,899 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:51:07,899 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:51:07,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-13 00:51:07,899 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr24REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 47 more)] === [2021-10-13 00:51:07,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:51:07,900 INFO L82 PathProgramCache]: Analyzing trace with hash -531481519, now seen corresponding path program 1 times [2021-10-13 00:51:07,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:51:07,900 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076509605] [2021-10-13 00:51:07,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:51:07,901 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:51:07,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:51:08,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:51:08,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:51:08,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:51:08,032 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:51:08,032 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076509605] [2021-10-13 00:51:08,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076509605] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:51:08,033 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:51:08,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-13 00:51:08,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605360493] [2021-10-13 00:51:08,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-13 00:51:08,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:51:08,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-13 00:51:08,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-10-13 00:51:08,035 INFO L87 Difference]: Start difference. First operand 102 states and 109 transitions. Second operand has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:08,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:51:08,454 INFO L93 Difference]: Finished difference Result 144 states and 153 transitions. [2021-10-13 00:51:08,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 00:51:08,455 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-10-13 00:51:08,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:51:08,456 INFO L225 Difference]: With dead ends: 144 [2021-10-13 00:51:08,456 INFO L226 Difference]: Without dead ends: 144 [2021-10-13 00:51:08,456 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 128.0ms TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-10-13 00:51:08,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-10-13 00:51:08,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 104. [2021-10-13 00:51:08,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 73 states have (on average 1.4931506849315068) internal successors, (109), 100 states have internal predecessors, (109), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:08,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 112 transitions. [2021-10-13 00:51:08,462 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 112 transitions. Word has length 18 [2021-10-13 00:51:08,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:51:08,471 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 112 transitions. [2021-10-13 00:51:08,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:08,471 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 112 transitions. [2021-10-13 00:51:08,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-13 00:51:08,472 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:51:08,472 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:51:08,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-13 00:51:08,473 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr25REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 47 more)] === [2021-10-13 00:51:08,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:51:08,473 INFO L82 PathProgramCache]: Analyzing trace with hash -531481518, now seen corresponding path program 1 times [2021-10-13 00:51:08,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:51:08,474 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298111232] [2021-10-13 00:51:08,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:51:08,474 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:51:08,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:51:08,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:51:08,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:51:08,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:51:08,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:51:08,719 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298111232] [2021-10-13 00:51:08,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298111232] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:51:08,720 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:51:08,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-13 00:51:08,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021071094] [2021-10-13 00:51:08,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-13 00:51:08,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:51:08,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-13 00:51:08,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-10-13 00:51:08,723 INFO L87 Difference]: Start difference. First operand 104 states and 112 transitions. Second operand has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:09,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:51:09,212 INFO L93 Difference]: Finished difference Result 176 states and 187 transitions. [2021-10-13 00:51:09,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-13 00:51:09,212 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-10-13 00:51:09,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:51:09,214 INFO L225 Difference]: With dead ends: 176 [2021-10-13 00:51:09,214 INFO L226 Difference]: Without dead ends: 176 [2021-10-13 00:51:09,215 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 197.6ms TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-10-13 00:51:09,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-10-13 00:51:09,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 116. [2021-10-13 00:51:09,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 85 states have (on average 1.4941176470588236) internal successors, (127), 112 states have internal predecessors, (127), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:09,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 130 transitions. [2021-10-13 00:51:09,220 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 130 transitions. Word has length 18 [2021-10-13 00:51:09,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:51:09,221 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 130 transitions. [2021-10-13 00:51:09,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:09,221 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 130 transitions. [2021-10-13 00:51:09,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-13 00:51:09,222 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:51:09,222 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:51:09,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-13 00:51:09,222 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr14REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 47 more)] === [2021-10-13 00:51:09,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:51:09,223 INFO L82 PathProgramCache]: Analyzing trace with hash 281486598, now seen corresponding path program 1 times [2021-10-13 00:51:09,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:51:09,223 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449023949] [2021-10-13 00:51:09,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:51:09,224 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:51:09,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:51:09,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:51:09,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:51:09,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:51:09,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:51:09,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449023949] [2021-10-13 00:51:09,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449023949] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:51:09,370 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:51:09,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-13 00:51:09,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898254128] [2021-10-13 00:51:09,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 00:51:09,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:51:09,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 00:51:09,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-10-13 00:51:09,372 INFO L87 Difference]: Start difference. First operand 116 states and 130 transitions. Second operand has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:09,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:51:09,803 INFO L93 Difference]: Finished difference Result 124 states and 139 transitions. [2021-10-13 00:51:09,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-13 00:51:09,803 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-10-13 00:51:09,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:51:09,804 INFO L225 Difference]: With dead ends: 124 [2021-10-13 00:51:09,804 INFO L226 Difference]: Without dead ends: 124 [2021-10-13 00:51:09,805 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 198.2ms TimeCoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2021-10-13 00:51:09,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-10-13 00:51:09,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 115. [2021-10-13 00:51:09,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 85 states have (on average 1.4823529411764707) internal successors, (126), 111 states have internal predecessors, (126), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:09,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 129 transitions. [2021-10-13 00:51:09,809 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 129 transitions. Word has length 20 [2021-10-13 00:51:09,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:51:09,809 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 129 transitions. [2021-10-13 00:51:09,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:09,809 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 129 transitions. [2021-10-13 00:51:09,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-13 00:51:09,810 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:51:09,810 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:51:09,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-13 00:51:09,810 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr15REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 47 more)] === [2021-10-13 00:51:09,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:51:09,811 INFO L82 PathProgramCache]: Analyzing trace with hash 281486599, now seen corresponding path program 1 times [2021-10-13 00:51:09,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:51:09,811 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478337050] [2021-10-13 00:51:09,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:51:09,812 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:51:09,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:51:09,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:51:09,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:51:09,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:51:09,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:51:09,985 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478337050] [2021-10-13 00:51:09,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478337050] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:51:09,985 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:51:09,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-13 00:51:09,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659182182] [2021-10-13 00:51:09,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-13 00:51:09,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:51:09,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-13 00:51:09,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-10-13 00:51:09,989 INFO L87 Difference]: Start difference. First operand 115 states and 129 transitions. Second operand has 11 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:10,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:51:10,638 INFO L93 Difference]: Finished difference Result 119 states and 134 transitions. [2021-10-13 00:51:10,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-13 00:51:10,639 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-10-13 00:51:10,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:51:10,640 INFO L225 Difference]: With dead ends: 119 [2021-10-13 00:51:10,640 INFO L226 Difference]: Without dead ends: 119 [2021-10-13 00:51:10,641 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 354.2ms TimeCoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2021-10-13 00:51:10,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-10-13 00:51:10,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 103. [2021-10-13 00:51:10,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 79 states have (on average 1.4430379746835442) internal successors, (114), 99 states have internal predecessors, (114), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:10,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 117 transitions. [2021-10-13 00:51:10,645 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 117 transitions. Word has length 20 [2021-10-13 00:51:10,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:51:10,646 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 117 transitions. [2021-10-13 00:51:10,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:10,646 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 117 transitions. [2021-10-13 00:51:10,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-13 00:51:10,647 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:51:10,647 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:51:10,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-13 00:51:10,648 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr28REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 47 more)] === [2021-10-13 00:51:10,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:51:10,648 INFO L82 PathProgramCache]: Analyzing trace with hash -2116385007, now seen corresponding path program 1 times [2021-10-13 00:51:10,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:51:10,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665626979] [2021-10-13 00:51:10,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:51:10,649 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:51:10,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:51:10,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:51:10,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:51:10,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:51:10,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:51:10,888 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665626979] [2021-10-13 00:51:10,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665626979] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:51:10,888 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:51:10,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-13 00:51:10,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843555913] [2021-10-13 00:51:10,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 00:51:10,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:51:10,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 00:51:10,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-10-13 00:51:10,891 INFO L87 Difference]: Start difference. First operand 103 states and 117 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:11,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:51:11,380 INFO L93 Difference]: Finished difference Result 151 states and 162 transitions. [2021-10-13 00:51:11,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-13 00:51:11,380 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-10-13 00:51:11,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:51:11,382 INFO L225 Difference]: With dead ends: 151 [2021-10-13 00:51:11,382 INFO L226 Difference]: Without dead ends: 151 [2021-10-13 00:51:11,382 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 251.6ms TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-10-13 00:51:11,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-10-13 00:51:11,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 103. [2021-10-13 00:51:11,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 79 states have (on average 1.4303797468354431) internal successors, (113), 99 states have internal predecessors, (113), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:11,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 116 transitions. [2021-10-13 00:51:11,387 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 116 transitions. Word has length 21 [2021-10-13 00:51:11,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:51:11,388 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 116 transitions. [2021-10-13 00:51:11,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:11,388 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 116 transitions. [2021-10-13 00:51:11,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-13 00:51:11,389 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:51:11,389 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:51:11,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-13 00:51:11,389 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr29REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 47 more)] === [2021-10-13 00:51:11,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:51:11,390 INFO L82 PathProgramCache]: Analyzing trace with hash -2116385006, now seen corresponding path program 1 times [2021-10-13 00:51:11,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:51:11,390 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227958989] [2021-10-13 00:51:11,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:51:11,391 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:51:11,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:51:11,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:51:11,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:51:11,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:51:11,616 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:51:11,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227958989] [2021-10-13 00:51:11,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227958989] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:51:11,616 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:51:11,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-13 00:51:11,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785936600] [2021-10-13 00:51:11,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-13 00:51:11,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:51:11,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-13 00:51:11,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-10-13 00:51:11,619 INFO L87 Difference]: Start difference. First operand 103 states and 116 transitions. Second operand has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:12,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:51:12,013 INFO L93 Difference]: Finished difference Result 161 states and 172 transitions. [2021-10-13 00:51:12,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-13 00:51:12,013 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-10-13 00:51:12,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:51:12,015 INFO L225 Difference]: With dead ends: 161 [2021-10-13 00:51:12,015 INFO L226 Difference]: Without dead ends: 161 [2021-10-13 00:51:12,015 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 177.3ms TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-10-13 00:51:12,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-10-13 00:51:12,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 103. [2021-10-13 00:51:12,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 79 states have (on average 1.4177215189873418) internal successors, (112), 99 states have internal predecessors, (112), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:12,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 115 transitions. [2021-10-13 00:51:12,019 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 115 transitions. Word has length 21 [2021-10-13 00:51:12,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:51:12,019 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 115 transitions. [2021-10-13 00:51:12,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:12,020 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 115 transitions. [2021-10-13 00:51:12,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-13 00:51:12,020 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:51:12,020 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:51:12,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-13 00:51:12,021 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr41REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 47 more)] === [2021-10-13 00:51:12,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:51:12,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1183440567, now seen corresponding path program 1 times [2021-10-13 00:51:12,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:51:12,021 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762329422] [2021-10-13 00:51:12,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:51:12,022 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:51:12,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:51:12,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:51:12,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:51:12,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:51:12,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:51:12,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762329422] [2021-10-13 00:51:12,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762329422] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:51:12,092 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:51:12,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-13 00:51:12,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956015563] [2021-10-13 00:51:12,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 00:51:12,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:51:12,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 00:51:12,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-13 00:51:12,093 INFO L87 Difference]: Start difference. First operand 103 states and 115 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:12,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:51:12,404 INFO L93 Difference]: Finished difference Result 140 states and 155 transitions. [2021-10-13 00:51:12,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 00:51:12,404 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2021-10-13 00:51:12,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:51:12,405 INFO L225 Difference]: With dead ends: 140 [2021-10-13 00:51:12,405 INFO L226 Difference]: Without dead ends: 140 [2021-10-13 00:51:12,406 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 75.8ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-10-13 00:51:12,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-10-13 00:51:12,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 104. [2021-10-13 00:51:12,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 80 states have (on average 1.425) internal successors, (114), 100 states have internal predecessors, (114), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:12,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 117 transitions. [2021-10-13 00:51:12,409 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 117 transitions. Word has length 22 [2021-10-13 00:51:12,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:51:12,410 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 117 transitions. [2021-10-13 00:51:12,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:12,410 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 117 transitions. [2021-10-13 00:51:12,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-13 00:51:12,411 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:51:12,411 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:51:12,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-13 00:51:12,411 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr42REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 47 more)] === [2021-10-13 00:51:12,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:51:12,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1183440566, now seen corresponding path program 1 times [2021-10-13 00:51:12,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:51:12,412 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781436943] [2021-10-13 00:51:12,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:51:12,412 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:51:12,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:51:12,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:51:12,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:51:12,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:51:12,604 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:51:12,605 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781436943] [2021-10-13 00:51:12,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781436943] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:51:12,605 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:51:12,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-13 00:51:12,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211300625] [2021-10-13 00:51:12,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 00:51:12,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:51:12,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 00:51:12,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-10-13 00:51:12,606 INFO L87 Difference]: Start difference. First operand 104 states and 117 transitions. Second operand has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:13,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:51:13,183 INFO L93 Difference]: Finished difference Result 151 states and 163 transitions. [2021-10-13 00:51:13,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-13 00:51:13,184 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2021-10-13 00:51:13,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:51:13,185 INFO L225 Difference]: With dead ends: 151 [2021-10-13 00:51:13,185 INFO L226 Difference]: Without dead ends: 151 [2021-10-13 00:51:13,186 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 299.8ms TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2021-10-13 00:51:13,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-10-13 00:51:13,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 123. [2021-10-13 00:51:13,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 99 states have (on average 1.4848484848484849) internal successors, (147), 119 states have internal predecessors, (147), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:13,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 150 transitions. [2021-10-13 00:51:13,193 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 150 transitions. Word has length 22 [2021-10-13 00:51:13,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:51:13,194 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 150 transitions. [2021-10-13 00:51:13,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:13,194 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 150 transitions. [2021-10-13 00:51:13,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-13 00:51:13,200 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:51:13,200 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:51:13,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-10-13 00:51:13,201 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr48ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 47 more)] === [2021-10-13 00:51:13,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:51:13,201 INFO L82 PathProgramCache]: Analyzing trace with hash 879953592, now seen corresponding path program 1 times [2021-10-13 00:51:13,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:51:13,202 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227352932] [2021-10-13 00:51:13,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:51:13,202 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:51:13,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:51:13,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:51:13,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:51:13,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:51:13,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:51:13,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227352932] [2021-10-13 00:51:13,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227352932] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:51:13,519 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:51:13,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-10-13 00:51:13,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125680163] [2021-10-13 00:51:13,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-13 00:51:13,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:51:13,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-13 00:51:13,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-10-13 00:51:13,523 INFO L87 Difference]: Start difference. First operand 123 states and 150 transitions. Second operand has 13 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:13,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:51:13,974 INFO L93 Difference]: Finished difference Result 165 states and 176 transitions. [2021-10-13 00:51:13,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-13 00:51:13,974 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2021-10-13 00:51:13,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:51:13,977 INFO L225 Difference]: With dead ends: 165 [2021-10-13 00:51:13,977 INFO L226 Difference]: Without dead ends: 165 [2021-10-13 00:51:13,978 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 282.1ms TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2021-10-13 00:51:13,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-10-13 00:51:13,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 124. [2021-10-13 00:51:13,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 100 states have (on average 1.48) internal successors, (148), 120 states have internal predecessors, (148), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:13,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 151 transitions. [2021-10-13 00:51:13,993 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 151 transitions. Word has length 24 [2021-10-13 00:51:13,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:51:13,993 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 151 transitions. [2021-10-13 00:51:13,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:13,994 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 151 transitions. [2021-10-13 00:51:13,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-13 00:51:13,994 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:51:13,994 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:51:13,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-10-13 00:51:13,995 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr49ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 47 more)] === [2021-10-13 00:51:13,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:51:13,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1508757812, now seen corresponding path program 1 times [2021-10-13 00:51:13,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:51:13,997 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574351820] [2021-10-13 00:51:13,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:51:13,997 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:51:14,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:51:14,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:51:14,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:51:14,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:51:14,174 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:51:14,175 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574351820] [2021-10-13 00:51:14,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574351820] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:51:14,175 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:51:14,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-13 00:51:14,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416489744] [2021-10-13 00:51:14,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-13 00:51:14,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:51:14,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-13 00:51:14,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-10-13 00:51:14,178 INFO L87 Difference]: Start difference. First operand 124 states and 151 transitions. Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:14,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:51:14,521 INFO L93 Difference]: Finished difference Result 157 states and 171 transitions. [2021-10-13 00:51:14,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-13 00:51:14,522 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2021-10-13 00:51:14,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:51:14,523 INFO L225 Difference]: With dead ends: 157 [2021-10-13 00:51:14,524 INFO L226 Difference]: Without dead ends: 157 [2021-10-13 00:51:14,524 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 125.4ms TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-10-13 00:51:14,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-10-13 00:51:14,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 125. [2021-10-13 00:51:14,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 101 states have (on average 1.4752475247524752) internal successors, (149), 121 states have internal predecessors, (149), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:14,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 152 transitions. [2021-10-13 00:51:14,529 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 152 transitions. Word has length 25 [2021-10-13 00:51:14,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:51:14,530 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 152 transitions. [2021-10-13 00:51:14,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:14,530 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 152 transitions. [2021-10-13 00:51:14,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-13 00:51:14,531 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:51:14,531 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:51:14,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-10-13 00:51:14,531 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr36ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 47 more)] === [2021-10-13 00:51:14,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:51:14,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1952446068, now seen corresponding path program 1 times [2021-10-13 00:51:14,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:51:14,532 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960620469] [2021-10-13 00:51:14,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:51:14,532 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:51:14,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:51:14,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:51:14,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:51:14,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:51:14,579 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:51:14,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960620469] [2021-10-13 00:51:14,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960620469] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:51:14,579 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:51:14,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 00:51:14,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662863161] [2021-10-13 00:51:14,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 00:51:14,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:51:14,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 00:51:14,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:51:14,581 INFO L87 Difference]: Start difference. First operand 125 states and 152 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:14,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:51:14,704 INFO L93 Difference]: Finished difference Result 128 states and 155 transitions. [2021-10-13 00:51:14,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 00:51:14,704 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2021-10-13 00:51:14,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:51:14,706 INFO L225 Difference]: With dead ends: 128 [2021-10-13 00:51:14,706 INFO L226 Difference]: Without dead ends: 128 [2021-10-13 00:51:14,706 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.1ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:51:14,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-10-13 00:51:14,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2021-10-13 00:51:14,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 104 states have (on average 1.4615384615384615) internal successors, (152), 124 states have internal predecessors, (152), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:14,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 155 transitions. [2021-10-13 00:51:14,711 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 155 transitions. Word has length 25 [2021-10-13 00:51:14,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:51:14,713 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 155 transitions. [2021-10-13 00:51:14,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:14,713 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 155 transitions. [2021-10-13 00:51:14,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-13 00:51:14,714 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:51:14,714 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:51:14,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-10-13 00:51:14,715 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr18ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 47 more)] === [2021-10-13 00:51:14,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:51:14,715 INFO L82 PathProgramCache]: Analyzing trace with hash -2110605554, now seen corresponding path program 1 times [2021-10-13 00:51:14,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:51:14,716 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107738428] [2021-10-13 00:51:14,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:51:14,716 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:51:14,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:51:14,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:51:14,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:51:14,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:51:14,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:51:14,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107738428] [2021-10-13 00:51:14,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107738428] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:51:14,918 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:51:14,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-10-13 00:51:14,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635448384] [2021-10-13 00:51:14,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 00:51:14,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:51:14,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 00:51:14,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-10-13 00:51:14,920 INFO L87 Difference]: Start difference. First operand 128 states and 155 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:15,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:51:15,317 INFO L93 Difference]: Finished difference Result 162 states and 193 transitions. [2021-10-13 00:51:15,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-13 00:51:15,318 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2021-10-13 00:51:15,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:51:15,319 INFO L225 Difference]: With dead ends: 162 [2021-10-13 00:51:15,319 INFO L226 Difference]: Without dead ends: 162 [2021-10-13 00:51:15,320 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 166.6ms TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-10-13 00:51:15,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-10-13 00:51:15,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 142. [2021-10-13 00:51:15,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 118 states have (on average 1.4322033898305084) internal successors, (169), 138 states have internal predecessors, (169), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:15,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 172 transitions. [2021-10-13 00:51:15,325 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 172 transitions. Word has length 25 [2021-10-13 00:51:15,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:51:15,325 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 172 transitions. [2021-10-13 00:51:15,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:15,325 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 172 transitions. [2021-10-13 00:51:15,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-13 00:51:15,327 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:51:15,327 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:51:15,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-10-13 00:51:15,328 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr45ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 47 more)] === [2021-10-13 00:51:15,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:51:15,328 INFO L82 PathProgramCache]: Analyzing trace with hash -473102134, now seen corresponding path program 1 times [2021-10-13 00:51:15,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:51:15,329 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507388993] [2021-10-13 00:51:15,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:51:15,329 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:51:15,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:51:15,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:51:15,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:51:15,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:51:15,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:51:15,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507388993] [2021-10-13 00:51:15,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507388993] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:51:15,462 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:51:15,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-13 00:51:15,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761624544] [2021-10-13 00:51:15,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-13 00:51:15,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:51:15,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-13 00:51:15,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-10-13 00:51:15,464 INFO L87 Difference]: Start difference. First operand 142 states and 172 transitions. Second operand has 9 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:15,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:51:15,710 INFO L93 Difference]: Finished difference Result 159 states and 177 transitions. [2021-10-13 00:51:15,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-13 00:51:15,711 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2021-10-13 00:51:15,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:51:15,712 INFO L225 Difference]: With dead ends: 159 [2021-10-13 00:51:15,712 INFO L226 Difference]: Without dead ends: 159 [2021-10-13 00:51:15,712 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 86.7ms TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-10-13 00:51:15,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-10-13 00:51:15,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 144. [2021-10-13 00:51:15,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 120 states have (on average 1.425) internal successors, (171), 140 states have internal predecessors, (171), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:15,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 174 transitions. [2021-10-13 00:51:15,716 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 174 transitions. Word has length 26 [2021-10-13 00:51:15,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:51:15,716 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 174 transitions. [2021-10-13 00:51:15,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:15,716 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 174 transitions. [2021-10-13 00:51:15,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-13 00:51:15,716 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:51:15,717 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:51:15,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-10-13 00:51:15,717 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr34REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 47 more)] === [2021-10-13 00:51:15,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:51:15,717 INFO L82 PathProgramCache]: Analyzing trace with hash 396332860, now seen corresponding path program 1 times [2021-10-13 00:51:15,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:51:15,717 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729450864] [2021-10-13 00:51:15,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:51:15,718 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:51:15,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:51:15,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:51:15,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:51:15,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:51:15,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:51:15,780 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729450864] [2021-10-13 00:51:15,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729450864] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:51:15,781 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:51:15,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-13 00:51:15,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307546135] [2021-10-13 00:51:15,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 00:51:15,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:51:15,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 00:51:15,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-13 00:51:15,785 INFO L87 Difference]: Start difference. First operand 144 states and 174 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:15,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:51:15,963 INFO L93 Difference]: Finished difference Result 143 states and 171 transitions. [2021-10-13 00:51:15,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 00:51:15,964 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2021-10-13 00:51:15,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:51:15,965 INFO L225 Difference]: With dead ends: 143 [2021-10-13 00:51:15,965 INFO L226 Difference]: Without dead ends: 143 [2021-10-13 00:51:15,966 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.7ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-13 00:51:15,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-10-13 00:51:15,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2021-10-13 00:51:15,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 120 states have (on average 1.4) internal successors, (168), 139 states have internal predecessors, (168), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:15,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 171 transitions. [2021-10-13 00:51:15,970 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 171 transitions. Word has length 26 [2021-10-13 00:51:15,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:51:15,971 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 171 transitions. [2021-10-13 00:51:15,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:15,971 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 171 transitions. [2021-10-13 00:51:15,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-13 00:51:15,972 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:51:15,972 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:51:15,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-10-13 00:51:15,972 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr35REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 47 more)] === [2021-10-13 00:51:15,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:51:15,972 INFO L82 PathProgramCache]: Analyzing trace with hash 396332861, now seen corresponding path program 1 times [2021-10-13 00:51:15,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:51:15,973 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922639465] [2021-10-13 00:51:15,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:51:15,973 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:51:15,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:51:16,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:51:16,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:51:16,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:51:16,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:51:16,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922639465] [2021-10-13 00:51:16,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922639465] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:51:16,228 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:51:16,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-13 00:51:16,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577907127] [2021-10-13 00:51:16,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 00:51:16,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:51:16,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 00:51:16,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-13 00:51:16,231 INFO L87 Difference]: Start difference. First operand 143 states and 171 transitions. Second operand has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:16,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:51:16,634 INFO L93 Difference]: Finished difference Result 171 states and 185 transitions. [2021-10-13 00:51:16,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 00:51:16,636 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2021-10-13 00:51:16,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:51:16,638 INFO L225 Difference]: With dead ends: 171 [2021-10-13 00:51:16,638 INFO L226 Difference]: Without dead ends: 171 [2021-10-13 00:51:16,638 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 2 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 202.7ms TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-10-13 00:51:16,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-10-13 00:51:16,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 143. [2021-10-13 00:51:16,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 120 states have (on average 1.3916666666666666) internal successors, (167), 139 states have internal predecessors, (167), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:16,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 170 transitions. [2021-10-13 00:51:16,644 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 170 transitions. Word has length 26 [2021-10-13 00:51:16,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:51:16,644 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 170 transitions. [2021-10-13 00:51:16,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:16,645 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 170 transitions. [2021-10-13 00:51:16,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-13 00:51:16,645 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:51:16,645 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:51:16,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-10-13 00:51:16,646 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr51ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 47 more)] === [2021-10-13 00:51:16,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:51:16,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1782681097, now seen corresponding path program 1 times [2021-10-13 00:51:16,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:51:16,647 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424384987] [2021-10-13 00:51:16,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:51:16,647 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:51:16,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:51:16,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:51:16,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:51:16,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:51:16,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:51:16,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424384987] [2021-10-13 00:51:16,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424384987] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:51:16,859 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:51:16,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-13 00:51:16,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560811822] [2021-10-13 00:51:16,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 00:51:16,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:51:16,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 00:51:16,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-10-13 00:51:16,861 INFO L87 Difference]: Start difference. First operand 143 states and 170 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:17,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:51:17,230 INFO L93 Difference]: Finished difference Result 160 states and 174 transitions. [2021-10-13 00:51:17,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 00:51:17,231 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2021-10-13 00:51:17,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:51:17,232 INFO L225 Difference]: With dead ends: 160 [2021-10-13 00:51:17,232 INFO L226 Difference]: Without dead ends: 160 [2021-10-13 00:51:17,233 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 237.7ms TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-10-13 00:51:17,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-10-13 00:51:17,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 143. [2021-10-13 00:51:17,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 120 states have (on average 1.3833333333333333) internal successors, (166), 139 states have internal predecessors, (166), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:17,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 169 transitions. [2021-10-13 00:51:17,241 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 169 transitions. Word has length 27 [2021-10-13 00:51:17,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:51:17,241 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 169 transitions. [2021-10-13 00:51:17,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:17,241 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 169 transitions. [2021-10-13 00:51:17,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-13 00:51:17,242 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:51:17,242 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:51:17,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-10-13 00:51:17,242 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr24REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 47 more)] === [2021-10-13 00:51:17,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:51:17,243 INFO L82 PathProgramCache]: Analyzing trace with hash -1417209443, now seen corresponding path program 1 times [2021-10-13 00:51:17,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:51:17,243 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197984833] [2021-10-13 00:51:17,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:51:17,244 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:51:17,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:51:17,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:51:17,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:51:17,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:51:17,440 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:51:17,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197984833] [2021-10-13 00:51:17,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197984833] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:51:17,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607107017] [2021-10-13 00:51:17,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:51:17,441 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:51:17,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:51:17,446 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:51:17,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 00:51:17,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:51:17,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 00:51:17,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:51:17,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-10-13 00:51:17,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:51:17,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607107017] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:51:17,899 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-13 00:51:17,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 11 [2021-10-13 00:51:17,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890647741] [2021-10-13 00:51:17,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 00:51:17,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:51:17,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 00:51:17,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-10-13 00:51:17,901 INFO L87 Difference]: Start difference. First operand 143 states and 169 transitions. Second operand has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:18,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:51:18,076 INFO L93 Difference]: Finished difference Result 145 states and 170 transitions. [2021-10-13 00:51:18,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 00:51:18,077 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2021-10-13 00:51:18,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:51:18,078 INFO L225 Difference]: With dead ends: 145 [2021-10-13 00:51:18,078 INFO L226 Difference]: Without dead ends: 145 [2021-10-13 00:51:18,078 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 149.1ms TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-10-13 00:51:18,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-10-13 00:51:18,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 144. [2021-10-13 00:51:18,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 121 states have (on average 1.3801652892561984) internal successors, (167), 140 states have internal predecessors, (167), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:18,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 170 transitions. [2021-10-13 00:51:18,083 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 170 transitions. Word has length 28 [2021-10-13 00:51:18,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:51:18,083 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 170 transitions. [2021-10-13 00:51:18,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:18,083 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 170 transitions. [2021-10-13 00:51:18,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-13 00:51:18,084 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:51:18,084 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:51:18,120 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 00:51:18,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-10-13 00:51:18,299 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr25REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 47 more)] === [2021-10-13 00:51:18,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:51:18,299 INFO L82 PathProgramCache]: Analyzing trace with hash -1417209442, now seen corresponding path program 1 times [2021-10-13 00:51:18,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:51:18,300 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985570100] [2021-10-13 00:51:18,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:51:18,300 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:51:18,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:51:18,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:51:18,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:51:18,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:51:18,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:51:18,580 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985570100] [2021-10-13 00:51:18,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985570100] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:51:18,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039492666] [2021-10-13 00:51:18,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:51:18,581 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:51:18,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:51:18,583 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:51:18,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-13 00:51:18,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:51:18,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-13 00:51:18,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:51:18,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2021-10-13 00:51:18,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-10-13 00:51:18,957 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:51:18,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039492666] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:51:18,958 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-13 00:51:18,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 13 [2021-10-13 00:51:18,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305203444] [2021-10-13 00:51:18,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 00:51:18,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:51:18,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 00:51:18,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-10-13 00:51:18,959 INFO L87 Difference]: Start difference. First operand 144 states and 170 transitions. Second operand has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:19,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:51:19,174 INFO L93 Difference]: Finished difference Result 144 states and 167 transitions. [2021-10-13 00:51:19,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 00:51:19,175 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2021-10-13 00:51:19,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:51:19,176 INFO L225 Difference]: With dead ends: 144 [2021-10-13 00:51:19,176 INFO L226 Difference]: Without dead ends: 144 [2021-10-13 00:51:19,176 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 231.5ms TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-10-13 00:51:19,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-10-13 00:51:19,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 143. [2021-10-13 00:51:19,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 121 states have (on average 1.3471074380165289) internal successors, (163), 139 states have internal predecessors, (163), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:19,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 166 transitions. [2021-10-13 00:51:19,181 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 166 transitions. Word has length 28 [2021-10-13 00:51:19,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:51:19,181 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 166 transitions. [2021-10-13 00:51:19,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:19,181 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 166 transitions. [2021-10-13 00:51:19,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-13 00:51:19,182 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:51:19,182 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:51:19,222 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-13 00:51:19,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-10-13 00:51:19,395 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr36ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 47 more)] === [2021-10-13 00:51:19,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:51:19,395 INFO L82 PathProgramCache]: Analyzing trace with hash 287254844, now seen corresponding path program 1 times [2021-10-13 00:51:19,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:51:19,395 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937682541] [2021-10-13 00:51:19,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:51:19,396 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:51:19,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:51:19,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:51:19,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:51:19,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:51:19,705 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:51:19,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937682541] [2021-10-13 00:51:19,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937682541] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:51:19,705 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:51:19,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-10-13 00:51:19,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83911736] [2021-10-13 00:51:19,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 00:51:19,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:51:19,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 00:51:19,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-10-13 00:51:19,708 INFO L87 Difference]: Start difference. First operand 143 states and 166 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:20,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:51:20,170 INFO L93 Difference]: Finished difference Result 155 states and 169 transitions. [2021-10-13 00:51:20,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-13 00:51:20,171 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2021-10-13 00:51:20,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:51:20,172 INFO L225 Difference]: With dead ends: 155 [2021-10-13 00:51:20,172 INFO L226 Difference]: Without dead ends: 155 [2021-10-13 00:51:20,172 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 300.1ms TimeCoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2021-10-13 00:51:20,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-10-13 00:51:20,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 142. [2021-10-13 00:51:20,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 120 states have (on average 1.3416666666666666) internal successors, (161), 138 states have internal predecessors, (161), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:20,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 164 transitions. [2021-10-13 00:51:20,177 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 164 transitions. Word has length 29 [2021-10-13 00:51:20,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:51:20,177 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 164 transitions. [2021-10-13 00:51:20,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:20,178 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 164 transitions. [2021-10-13 00:51:20,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-13 00:51:20,178 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:51:20,179 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:51:20,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-10-13 00:51:20,179 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr23ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 47 more)] === [2021-10-13 00:51:20,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:51:20,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1071184815, now seen corresponding path program 1 times [2021-10-13 00:51:20,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:51:20,180 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305895960] [2021-10-13 00:51:20,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:51:20,180 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:51:20,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:51:20,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:51:20,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:51:20,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:51:20,224 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:51:20,224 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305895960] [2021-10-13 00:51:20,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305895960] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:51:20,224 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:51:20,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 00:51:20,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001571824] [2021-10-13 00:51:20,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 00:51:20,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:51:20,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 00:51:20,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:51:20,226 INFO L87 Difference]: Start difference. First operand 142 states and 164 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:20,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:51:20,341 INFO L93 Difference]: Finished difference Result 216 states and 241 transitions. [2021-10-13 00:51:20,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 00:51:20,342 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2021-10-13 00:51:20,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:51:20,344 INFO L225 Difference]: With dead ends: 216 [2021-10-13 00:51:20,345 INFO L226 Difference]: Without dead ends: 216 [2021-10-13 00:51:20,345 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.4ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:51:20,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-10-13 00:51:20,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 159. [2021-10-13 00:51:20,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 137 states have (on average 1.3065693430656935) internal successors, (179), 155 states have internal predecessors, (179), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:20,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 182 transitions. [2021-10-13 00:51:20,351 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 182 transitions. Word has length 29 [2021-10-13 00:51:20,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:51:20,351 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 182 transitions. [2021-10-13 00:51:20,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:20,351 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 182 transitions. [2021-10-13 00:51:20,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-13 00:51:20,352 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:51:20,352 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:51:20,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-10-13 00:51:20,352 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr27REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 47 more)] === [2021-10-13 00:51:20,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:51:20,353 INFO L82 PathProgramCache]: Analyzing trace with hash -433638846, now seen corresponding path program 1 times [2021-10-13 00:51:20,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:51:20,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528226910] [2021-10-13 00:51:20,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:51:20,353 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:51:20,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:51:20,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:51:20,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:51:20,575 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:51:20,575 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:51:20,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528226910] [2021-10-13 00:51:20,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528226910] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:51:20,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179910451] [2021-10-13 00:51:20,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:51:20,576 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:51:20,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:51:20,583 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:51:20,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-13 00:51:20,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:51:20,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-13 00:51:20,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:51:20,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-10-13 00:51:20,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-10-13 00:51:21,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-10-13 00:51:21,048 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:51:21,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179910451] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:51:21,049 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-13 00:51:21,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 18 [2021-10-13 00:51:21,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533022592] [2021-10-13 00:51:21,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-13 00:51:21,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:51:21,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-13 00:51:21,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-10-13 00:51:21,051 INFO L87 Difference]: Start difference. First operand 159 states and 182 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:21,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:51:21,384 INFO L93 Difference]: Finished difference Result 177 states and 201 transitions. [2021-10-13 00:51:21,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-13 00:51:21,385 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2021-10-13 00:51:21,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:51:21,391 INFO L225 Difference]: With dead ends: 177 [2021-10-13 00:51:21,391 INFO L226 Difference]: Without dead ends: 177 [2021-10-13 00:51:21,392 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 301.5ms TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-10-13 00:51:21,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-10-13 00:51:21,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 172. [2021-10-13 00:51:21,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 150 states have (on average 1.2933333333333332) internal successors, (194), 168 states have internal predecessors, (194), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:21,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 197 transitions. [2021-10-13 00:51:21,398 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 197 transitions. Word has length 30 [2021-10-13 00:51:21,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:51:21,398 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 197 transitions. [2021-10-13 00:51:21,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:21,399 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 197 transitions. [2021-10-13 00:51:21,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-13 00:51:21,400 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:51:21,400 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:51:21,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-13 00:51:21,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-10-13 00:51:21,627 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr23ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 47 more)] === [2021-10-13 00:51:21,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:51:21,627 INFO L82 PathProgramCache]: Analyzing trace with hash -134989526, now seen corresponding path program 1 times [2021-10-13 00:51:21,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:51:21,627 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485581528] [2021-10-13 00:51:21,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:51:21,628 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:51:21,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:51:21,675 ERROR L253 erpolLogProxyWrapper]: Interpolant 14 not inductive [2021-10-13 00:51:21,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-10-13 00:51:21,693 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: generated interpolants did not pass sanity check at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:232) at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.getInterpolants(SMTInterpol.java:876) at de.uni_freiburg.informatik.ultimate.logic.NoopScript.getInterpolants(NoopScript.java:392) at de.uni_freiburg.informatik.ultimate.logic.NoopScript.getInterpolants(NoopScript.java:386) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:337) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:337) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.getInterpolants(ManagedScript.java:191) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.computeCraigInterpolants(NestedInterpolantsBuilder.java:285) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.(NestedInterpolantsBuilder.java:166) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsRecursive(InterpolatingTraceCheckCraig.java:327) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolants(InterpolatingTraceCheckCraig.java:229) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:97) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleCraig.construct(IpTcStrategyModuleCraig.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleCraig.construct(IpTcStrategyModuleCraig.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:211) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:124) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:608) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:53) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:392) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-10-13 00:51:21,703 INFO L168 Benchmark]: Toolchain (without parser) took 18620.03 ms. Allocated memory was 90.2 MB in the beginning and 146.8 MB in the end (delta: 56.6 MB). Free memory was 52.6 MB in the beginning and 56.6 MB in the end (delta: -4.0 MB). Peak memory consumption was 50.7 MB. Max. memory is 16.1 GB. [2021-10-13 00:51:21,704 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 90.2 MB. Free memory is still 70.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 00:51:21,704 INFO L168 Benchmark]: CACSL2BoogieTranslator took 569.76 ms. Allocated memory was 90.2 MB in the beginning and 113.2 MB in the end (delta: 23.1 MB). Free memory was 52.4 MB in the beginning and 80.6 MB in the end (delta: -28.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-13 00:51:21,705 INFO L168 Benchmark]: Boogie Preprocessor took 76.43 ms. Allocated memory is still 113.2 MB. Free memory was 80.6 MB in the beginning and 77.8 MB in the end (delta: 2.9 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-13 00:51:21,706 INFO L168 Benchmark]: RCFGBuilder took 778.63 ms. Allocated memory is still 113.2 MB. Free memory was 77.4 MB in the beginning and 53.1 MB in the end (delta: 24.3 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. [2021-10-13 00:51:21,706 INFO L168 Benchmark]: TraceAbstraction took 17189.58 ms. Allocated memory was 113.2 MB in the beginning and 146.8 MB in the end (delta: 33.6 MB). Free memory was 52.6 MB in the beginning and 56.6 MB in the end (delta: -4.0 MB). Peak memory consumption was 30.0 MB. Max. memory is 16.1 GB. [2021-10-13 00:51:21,708 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 90.2 MB. Free memory is still 70.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 569.76 ms. Allocated memory was 90.2 MB in the beginning and 113.2 MB in the end (delta: 23.1 MB). Free memory was 52.4 MB in the beginning and 80.6 MB in the end (delta: -28.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 76.43 ms. Allocated memory is still 113.2 MB. Free memory was 80.6 MB in the beginning and 77.8 MB in the end (delta: 2.9 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 778.63 ms. Allocated memory is still 113.2 MB. Free memory was 77.4 MB in the beginning and 53.1 MB in the end (delta: 24.3 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 17189.58 ms. Allocated memory was 113.2 MB in the beginning and 146.8 MB in the end (delta: 33.6 MB). Free memory was 52.6 MB in the beginning and 56.6 MB in the end (delta: -4.0 MB). Peak memory consumption was 30.0 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: generated interpolants did not pass sanity check de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: generated interpolants did not pass sanity check: de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:232) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-10-13 00:51:21,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 00:51:24,446 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 00:51:24,448 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 00:51:24,503 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 00:51:24,504 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 00:51:24,509 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 00:51:24,511 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 00:51:24,517 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 00:51:24,521 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 00:51:24,527 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 00:51:24,528 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 00:51:24,530 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 00:51:24,531 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 00:51:24,533 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 00:51:24,536 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 00:51:24,540 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 00:51:24,542 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 00:51:24,543 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 00:51:24,545 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 00:51:24,554 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 00:51:24,556 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 00:51:24,558 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 00:51:24,561 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 00:51:24,563 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 00:51:24,573 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 00:51:24,573 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 00:51:24,574 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 00:51:24,576 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 00:51:24,577 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 00:51:24,578 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 00:51:24,578 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 00:51:24,579 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 00:51:24,582 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 00:51:24,583 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 00:51:24,584 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 00:51:24,585 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 00:51:24,586 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 00:51:24,586 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 00:51:24,586 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 00:51:24,588 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 00:51:24,589 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 00:51:24,595 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-10-13 00:51:24,638 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 00:51:24,638 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 00:51:24,638 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-13 00:51:24,639 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-13 00:51:24,640 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 00:51:24,640 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 00:51:24,640 INFO L138 SettingsManager]: * Use SBE=true [2021-10-13 00:51:24,641 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 00:51:24,641 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 00:51:24,641 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-13 00:51:24,641 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 00:51:24,642 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 00:51:24,642 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 00:51:24,642 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-13 00:51:24,642 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-13 00:51:24,643 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-13 00:51:24,643 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 00:51:24,643 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 00:51:24,643 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 00:51:24,643 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 00:51:24,644 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 00:51:24,644 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 00:51:24,644 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 00:51:24,644 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 00:51:24,645 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 00:51:24,645 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 00:51:24,645 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 00:51:24,645 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 00:51:24,646 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-13 00:51:24,646 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 00:51:24,646 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 00:51:24,646 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 00:51:24,646 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_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d7d859c146e69673ad9c70e998d47ea3e35bbb83 [2021-10-13 00:51:25,087 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 00:51:25,132 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 00:51:25,136 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 00:51:25,137 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 00:51:25,138 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 00:51:25,141 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/../../sv-benchmarks/c/forester-heap/dll-circular-2.i [2021-10-13 00:51:25,218 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/data/3fab2ab14/0acfdebe2806453eaf0a17b51eb57a44/FLAG4bad72d1c [2021-10-13 00:51:25,995 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 00:51:25,996 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/sv-benchmarks/c/forester-heap/dll-circular-2.i [2021-10-13 00:51:26,018 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/data/3fab2ab14/0acfdebe2806453eaf0a17b51eb57a44/FLAG4bad72d1c [2021-10-13 00:51:26,271 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/data/3fab2ab14/0acfdebe2806453eaf0a17b51eb57a44 [2021-10-13 00:51:26,274 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 00:51:26,282 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-13 00:51:26,288 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 00:51:26,288 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 00:51:26,292 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 00:51:26,293 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:51:26" (1/1) ... [2021-10-13 00:51:26,295 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d97febb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:51:26, skipping insertion in model container [2021-10-13 00:51:26,295 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:51:26" (1/1) ... [2021-10-13 00:51:26,305 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 00:51:26,371 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 00:51:26,758 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/sv-benchmarks/c/forester-heap/dll-circular-2.i[22391,22404] [2021-10-13 00:51:26,764 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/sv-benchmarks/c/forester-heap/dll-circular-2.i[22497,22510] [2021-10-13 00:51:26,770 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/sv-benchmarks/c/forester-heap/dll-circular-2.i[22622,22635] [2021-10-13 00:51:26,782 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 00:51:26,805 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 00:51:26,877 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/sv-benchmarks/c/forester-heap/dll-circular-2.i[22391,22404] [2021-10-13 00:51:26,885 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/sv-benchmarks/c/forester-heap/dll-circular-2.i[22497,22510] [2021-10-13 00:51:26,891 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/sv-benchmarks/c/forester-heap/dll-circular-2.i[22622,22635] [2021-10-13 00:51:26,897 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 00:51:26,939 INFO L208 MainTranslator]: Completed translation [2021-10-13 00:51:26,940 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:51:26 WrapperNode [2021-10-13 00:51:26,940 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 00:51:26,941 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 00:51:26,941 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 00:51:26,942 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 00:51:26,955 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:51:26" (1/1) ... [2021-10-13 00:51:26,955 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:51:26" (1/1) ... [2021-10-13 00:51:26,975 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:51:26" (1/1) ... [2021-10-13 00:51:26,976 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:51:26" (1/1) ... [2021-10-13 00:51:26,999 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:51:26" (1/1) ... [2021-10-13 00:51:27,005 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:51:26" (1/1) ... [2021-10-13 00:51:27,010 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:51:26" (1/1) ... [2021-10-13 00:51:27,018 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 00:51:27,019 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 00:51:27,019 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 00:51:27,019 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 00:51:27,020 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:51:26" (1/1) ... [2021-10-13 00:51:27,027 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 00:51:27,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:51:27,052 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 00:51:27,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 00:51:27,101 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-13 00:51:27,102 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 00:51:27,104 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.setCurrentRoundingMode [2021-10-13 00:51:27,105 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-10-13 00:51:27,106 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-13 00:51:27,106 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-13 00:51:27,106 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-13 00:51:27,111 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-13 00:51:27,111 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-13 00:51:27,111 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-13 00:51:27,111 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-13 00:51:27,112 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-13 00:51:27,112 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-13 00:51:27,112 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-13 00:51:27,112 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-13 00:51:27,112 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-13 00:51:27,113 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-13 00:51:27,113 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-13 00:51:27,113 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-13 00:51:27,113 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-13 00:51:27,113 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-13 00:51:27,114 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-13 00:51:27,114 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-13 00:51:27,114 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-13 00:51:27,114 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-13 00:51:27,114 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-13 00:51:27,115 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-13 00:51:27,115 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-13 00:51:27,115 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-13 00:51:27,115 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-13 00:51:27,115 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-13 00:51:27,116 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-13 00:51:27,116 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-13 00:51:27,116 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-13 00:51:27,116 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-13 00:51:27,116 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-13 00:51:27,116 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-13 00:51:27,117 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-13 00:51:27,117 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-13 00:51:27,118 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-13 00:51:27,118 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-13 00:51:27,119 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-13 00:51:27,119 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-13 00:51:27,119 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-13 00:51:27,120 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-13 00:51:27,120 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-13 00:51:27,120 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-13 00:51:27,120 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-13 00:51:27,121 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-13 00:51:27,121 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-13 00:51:27,121 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-13 00:51:27,121 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-13 00:51:27,121 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-13 00:51:27,122 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-13 00:51:27,122 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-13 00:51:27,122 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-13 00:51:27,123 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-13 00:51:27,124 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-13 00:51:27,124 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-13 00:51:27,126 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-10-13 00:51:27,126 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-13 00:51:27,127 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-13 00:51:27,127 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-13 00:51:27,128 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-13 00:51:27,128 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-13 00:51:27,128 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-13 00:51:27,128 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-13 00:51:27,128 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-13 00:51:27,128 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-13 00:51:27,129 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-13 00:51:27,129 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-13 00:51:27,129 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-13 00:51:27,129 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-13 00:51:27,129 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-13 00:51:27,134 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-13 00:51:27,135 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-13 00:51:27,135 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-13 00:51:27,135 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-13 00:51:27,135 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-13 00:51:27,135 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-13 00:51:27,136 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-13 00:51:27,136 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-13 00:51:27,136 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-13 00:51:27,136 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-13 00:51:27,136 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-13 00:51:27,137 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-13 00:51:27,137 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-13 00:51:27,137 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-13 00:51:27,137 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-13 00:51:27,137 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-13 00:51:27,138 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-13 00:51:27,138 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-13 00:51:27,138 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-13 00:51:27,138 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-13 00:51:27,138 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-13 00:51:27,139 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-13 00:51:27,139 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-13 00:51:27,139 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-13 00:51:27,140 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-13 00:51:27,140 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-13 00:51:27,140 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-13 00:51:27,140 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-13 00:51:27,140 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-13 00:51:27,140 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-13 00:51:27,141 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-13 00:51:27,141 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-13 00:51:27,141 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-13 00:51:27,141 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-13 00:51:27,160 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-13 00:51:27,161 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-10-13 00:51:27,161 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-10-13 00:51:27,161 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-10-13 00:51:27,161 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-10-13 00:51:27,162 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 00:51:27,162 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-13 00:51:27,162 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 00:51:27,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-13 00:51:27,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-13 00:51:27,163 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-13 00:51:27,164 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-13 00:51:27,165 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 00:51:27,168 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-13 00:51:27,169 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 00:51:27,169 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 00:51:27,169 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.setCurrentRoundingMode [2021-10-13 00:51:27,170 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-10-13 00:51:27,171 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-10-13 00:51:28,107 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 00:51:28,107 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-10-13 00:51:28,109 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:51:28 BoogieIcfgContainer [2021-10-13 00:51:28,110 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 00:51:28,112 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 00:51:28,112 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 00:51:28,115 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 00:51:28,116 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 12:51:26" (1/3) ... [2021-10-13 00:51:28,117 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@641eed14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:51:28, skipping insertion in model container [2021-10-13 00:51:28,117 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:51:26" (2/3) ... [2021-10-13 00:51:28,117 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@641eed14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:51:28, skipping insertion in model container [2021-10-13 00:51:28,118 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:51:28" (3/3) ... [2021-10-13 00:51:28,119 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-circular-2.i [2021-10-13 00:51:28,125 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 00:51:28,126 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 52 error locations. [2021-10-13 00:51:28,189 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 00:51:28,196 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, mConcurrency=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 [2021-10-13 00:51:28,197 INFO L340 AbstractCegarLoop]: Starting to check reachability of 52 error locations. [2021-10-13 00:51:28,215 INFO L276 IsEmpty]: Start isEmpty. Operand has 115 states, 58 states have (on average 2.2241379310344827) internal successors, (129), 110 states have internal predecessors, (129), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-13 00:51:28,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-13 00:51:28,223 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:51:28,224 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:51:28,224 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 47 more)] === [2021-10-13 00:51:28,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:51:28,230 INFO L82 PathProgramCache]: Analyzing trace with hash -169546131, now seen corresponding path program 1 times [2021-10-13 00:51:28,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 00:51:28,243 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1869360465] [2021-10-13 00:51:28,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:51:28,244 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 00:51:28,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 00:51:28,247 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 00:51:28,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 00:51:28,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:51:28,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 00:51:28,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:51:28,489 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 [2021-10-13 00:51:28,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:51:28,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 00:51:28,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:51:28,549 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 00:51:28,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1869360465] [2021-10-13 00:51:28,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1869360465] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 00:51:28,550 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:51:28,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-13 00:51:28,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774598417] [2021-10-13 00:51:28,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 00:51:28,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 00:51:28,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 00:51:28,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 00:51:28,582 INFO L87 Difference]: Start difference. First operand has 115 states, 58 states have (on average 2.2241379310344827) internal successors, (129), 110 states have internal predecessors, (129), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:28,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:51:28,843 INFO L93 Difference]: Finished difference Result 120 states and 127 transitions. [2021-10-13 00:51:28,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 00:51:28,845 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 7 [2021-10-13 00:51:28,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:51:28,854 INFO L225 Difference]: With dead ends: 120 [2021-10-13 00:51:28,854 INFO L226 Difference]: Without dead ends: 117 [2021-10-13 00:51:28,855 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 00:51:28,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-10-13 00:51:28,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 107. [2021-10-13 00:51:28,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 57 states have (on average 1.9298245614035088) internal successors, (110), 103 states have internal predecessors, (110), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:28,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 113 transitions. [2021-10-13 00:51:28,895 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 113 transitions. Word has length 7 [2021-10-13 00:51:28,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:51:28,896 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 113 transitions. [2021-10-13 00:51:28,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:28,897 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 113 transitions. [2021-10-13 00:51:28,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-13 00:51:28,897 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:51:28,897 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:51:28,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-13 00:51:29,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 00:51:29,111 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 47 more)] === [2021-10-13 00:51:29,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:51:29,112 INFO L82 PathProgramCache]: Analyzing trace with hash -169546130, now seen corresponding path program 1 times [2021-10-13 00:51:29,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 00:51:29,113 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1298553041] [2021-10-13 00:51:29,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:51:29,113 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 00:51:29,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 00:51:29,115 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 00:51:29,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 00:51:29,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:51:29,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 00:51:29,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:51:29,297 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 [2021-10-13 00:51:29,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:51:29,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 00:51:29,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:51:29,409 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 00:51:29,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1298553041] [2021-10-13 00:51:29,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1298553041] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 00:51:29,410 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:51:29,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-10-13 00:51:29,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957067066] [2021-10-13 00:51:29,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 00:51:29,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 00:51:29,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 00:51:29,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:51:29,413 INFO L87 Difference]: Start difference. First operand 107 states and 113 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:29,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:51:29,784 INFO L93 Difference]: Finished difference Result 114 states and 120 transitions. [2021-10-13 00:51:29,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 00:51:29,786 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 7 [2021-10-13 00:51:29,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:51:29,788 INFO L225 Difference]: With dead ends: 114 [2021-10-13 00:51:29,788 INFO L226 Difference]: Without dead ends: 114 [2021-10-13 00:51:29,789 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.3ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:51:29,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-10-13 00:51:29,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 102. [2021-10-13 00:51:29,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 57 states have (on average 1.8421052631578947) internal successors, (105), 98 states have internal predecessors, (105), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:29,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 108 transitions. [2021-10-13 00:51:29,802 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 108 transitions. Word has length 7 [2021-10-13 00:51:29,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:51:29,802 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 108 transitions. [2021-10-13 00:51:29,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:29,803 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 108 transitions. [2021-10-13 00:51:29,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 00:51:29,804 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:51:29,804 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:51:29,820 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-13 00:51:30,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 00:51:30,021 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr20REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 47 more)] === [2021-10-13 00:51:30,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:51:30,021 INFO L82 PathProgramCache]: Analyzing trace with hash -196455942, now seen corresponding path program 1 times [2021-10-13 00:51:30,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 00:51:30,023 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [755260808] [2021-10-13 00:51:30,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:51:30,023 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 00:51:30,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 00:51:30,027 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 00:51:30,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-13 00:51:30,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:51:30,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 00:51:30,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:51:30,259 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 [2021-10-13 00:51:30,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:51:30,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 00:51:30,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:51:30,607 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 00:51:30,608 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [755260808] [2021-10-13 00:51:30,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [755260808] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 00:51:30,612 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:51:30,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-13 00:51:30,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272533382] [2021-10-13 00:51:30,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 00:51:30,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 00:51:30,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 00:51:30,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 00:51:30,622 INFO L87 Difference]: Start difference. First operand 102 states and 108 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:31,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:51:31,618 INFO L93 Difference]: Finished difference Result 132 states and 139 transitions. [2021-10-13 00:51:31,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 00:51:31,620 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-10-13 00:51:31,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:51:31,622 INFO L225 Difference]: With dead ends: 132 [2021-10-13 00:51:31,622 INFO L226 Difference]: Without dead ends: 132 [2021-10-13 00:51:31,623 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 208.5ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-10-13 00:51:31,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-10-13 00:51:31,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 109. [2021-10-13 00:51:31,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 65 states have (on average 1.8307692307692307) internal successors, (119), 105 states have internal predecessors, (119), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:31,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 122 transitions. [2021-10-13 00:51:31,635 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 122 transitions. Word has length 12 [2021-10-13 00:51:31,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:51:31,636 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 122 transitions. [2021-10-13 00:51:31,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:31,636 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 122 transitions. [2021-10-13 00:51:31,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 00:51:31,637 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:51:31,637 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:51:31,655 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-13 00:51:31,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 00:51:31,855 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr19REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 47 more)] === [2021-10-13 00:51:31,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:51:31,856 INFO L82 PathProgramCache]: Analyzing trace with hash -196455943, now seen corresponding path program 1 times [2021-10-13 00:51:31,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 00:51:31,857 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1061885136] [2021-10-13 00:51:31,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:51:31,858 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 00:51:31,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 00:51:31,859 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 00:51:31,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-13 00:51:32,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:51:32,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 00:51:32,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:51:32,064 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 [2021-10-13 00:51:32,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:51:32,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 00:51:32,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:51:32,190 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 00:51:32,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1061885136] [2021-10-13 00:51:32,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1061885136] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 00:51:32,191 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:51:32,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-13 00:51:32,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930594810] [2021-10-13 00:51:32,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 00:51:32,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 00:51:32,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 00:51:32,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:51:32,194 INFO L87 Difference]: Start difference. First operand 109 states and 122 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:32,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:51:32,526 INFO L93 Difference]: Finished difference Result 106 states and 116 transitions. [2021-10-13 00:51:32,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 00:51:32,527 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-10-13 00:51:32,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:51:32,528 INFO L225 Difference]: With dead ends: 106 [2021-10-13 00:51:32,528 INFO L226 Difference]: Without dead ends: 106 [2021-10-13 00:51:32,529 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 8 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:51:32,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-10-13 00:51:32,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 97. [2021-10-13 00:51:32,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 65 states have (on average 1.5846153846153845) internal successors, (103), 93 states have internal predecessors, (103), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:32,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 106 transitions. [2021-10-13 00:51:32,537 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 106 transitions. Word has length 12 [2021-10-13 00:51:32,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:51:32,538 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 106 transitions. [2021-10-13 00:51:32,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:32,538 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 106 transitions. [2021-10-13 00:51:32,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-13 00:51:32,539 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:51:32,539 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:51:32,557 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-13 00:51:32,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 00:51:32,753 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr10REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 47 more)] === [2021-10-13 00:51:32,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:51:32,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1421539775, now seen corresponding path program 1 times [2021-10-13 00:51:32,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 00:51:32,754 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [85877186] [2021-10-13 00:51:32,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:51:32,754 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 00:51:32,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 00:51:32,755 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 00:51:32,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-13 00:51:32,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:51:32,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 00:51:32,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:51:32,953 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 [2021-10-13 00:51:32,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-10-13 00:51:33,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-10-13 00:51:33,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:51:33,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 00:51:33,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:51:33,087 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 00:51:33,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [85877186] [2021-10-13 00:51:33,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [85877186] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 00:51:33,093 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:51:33,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-13 00:51:33,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467748705] [2021-10-13 00:51:33,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 00:51:33,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 00:51:33,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 00:51:33,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:51:33,099 INFO L87 Difference]: Start difference. First operand 97 states and 106 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:33,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:51:33,462 INFO L93 Difference]: Finished difference Result 96 states and 104 transitions. [2021-10-13 00:51:33,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 00:51:33,463 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-10-13 00:51:33,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:51:33,464 INFO L225 Difference]: With dead ends: 96 [2021-10-13 00:51:33,464 INFO L226 Difference]: Without dead ends: 96 [2021-10-13 00:51:33,464 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 52.1ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-13 00:51:33,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-10-13 00:51:33,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2021-10-13 00:51:33,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 65 states have (on average 1.5538461538461539) internal successors, (101), 92 states have internal predecessors, (101), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:33,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 104 transitions. [2021-10-13 00:51:33,470 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 104 transitions. Word has length 15 [2021-10-13 00:51:33,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:51:33,470 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 104 transitions. [2021-10-13 00:51:33,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:33,471 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 104 transitions. [2021-10-13 00:51:33,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-13 00:51:33,472 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:51:33,472 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:51:33,486 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-13 00:51:33,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 00:51:33,683 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr11REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 47 more)] === [2021-10-13 00:51:33,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:51:33,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1421539776, now seen corresponding path program 1 times [2021-10-13 00:51:33,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 00:51:33,684 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [410791484] [2021-10-13 00:51:33,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:51:33,684 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 00:51:33,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 00:51:33,685 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 00:51:33,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-13 00:51:33,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:51:33,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 00:51:33,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:51:33,889 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 [2021-10-13 00:51:33,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-13 00:51:33,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 00:51:33,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-10-13 00:51:34,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-10-13 00:51:34,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:51:34,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 00:51:34,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:51:34,273 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 00:51:34,273 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [410791484] [2021-10-13 00:51:34,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [410791484] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 00:51:34,273 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:51:34,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-10-13 00:51:34,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803308318] [2021-10-13 00:51:34,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 00:51:34,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 00:51:34,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 00:51:34,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-13 00:51:34,275 INFO L87 Difference]: Start difference. First operand 96 states and 104 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:35,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:51:35,081 INFO L93 Difference]: Finished difference Result 95 states and 102 transitions. [2021-10-13 00:51:35,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 00:51:35,082 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-10-13 00:51:35,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:51:35,083 INFO L225 Difference]: With dead ends: 95 [2021-10-13 00:51:35,083 INFO L226 Difference]: Without dead ends: 95 [2021-10-13 00:51:35,083 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 252.9ms TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-10-13 00:51:35,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-10-13 00:51:35,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2021-10-13 00:51:35,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 65 states have (on average 1.523076923076923) internal successors, (99), 91 states have internal predecessors, (99), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:35,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 102 transitions. [2021-10-13 00:51:35,090 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 102 transitions. Word has length 15 [2021-10-13 00:51:35,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:51:35,091 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 102 transitions. [2021-10-13 00:51:35,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:35,091 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 102 transitions. [2021-10-13 00:51:35,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 00:51:35,092 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:51:35,092 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:51:35,106 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-13 00:51:35,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 00:51:35,304 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr23ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 47 more)] === [2021-10-13 00:51:35,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:51:35,304 INFO L82 PathProgramCache]: Analyzing trace with hash 1117107868, now seen corresponding path program 1 times [2021-10-13 00:51:35,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 00:51:35,305 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1839435508] [2021-10-13 00:51:35,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:51:35,305 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 00:51:35,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 00:51:35,306 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 00:51:35,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-13 00:51:35,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:51:35,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 00:51:35,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:51:35,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 00:51:35,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:51:35,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-10-13 00:51:35,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:51:35,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:51:35,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:51:35,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-10-13 00:51:35,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:51:35,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:51:35,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:51:35,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-10-13 00:51:35,786 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 00:51:35,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2021-10-13 00:51:35,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:51:35,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 00:51:35,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:51:35,987 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 00:51:35,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1839435508] [2021-10-13 00:51:35,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1839435508] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 00:51:35,987 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:51:35,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 7] imperfect sequences [] total 11 [2021-10-13 00:51:35,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206159575] [2021-10-13 00:51:35,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-13 00:51:35,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 00:51:35,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-13 00:51:35,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-10-13 00:51:35,989 INFO L87 Difference]: Start difference. First operand 95 states and 102 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:36,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:51:36,758 INFO L93 Difference]: Finished difference Result 177 states and 188 transitions. [2021-10-13 00:51:36,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-13 00:51:36,759 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-10-13 00:51:36,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:51:36,760 INFO L225 Difference]: With dead ends: 177 [2021-10-13 00:51:36,761 INFO L226 Difference]: Without dead ends: 177 [2021-10-13 00:51:36,761 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 283.1ms TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-10-13 00:51:36,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-10-13 00:51:36,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 99. [2021-10-13 00:51:36,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 69 states have (on average 1.4927536231884058) internal successors, (103), 95 states have internal predecessors, (103), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:36,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 106 transitions. [2021-10-13 00:51:36,767 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 106 transitions. Word has length 16 [2021-10-13 00:51:36,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:51:36,768 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 106 transitions. [2021-10-13 00:51:36,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:36,768 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 106 transitions. [2021-10-13 00:51:36,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-13 00:51:36,769 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:51:36,769 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:51:36,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-13 00:51:36,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 00:51:36,985 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr24REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 47 more)] === [2021-10-13 00:51:36,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:51:36,986 INFO L82 PathProgramCache]: Analyzing trace with hash 270609740, now seen corresponding path program 1 times [2021-10-13 00:51:36,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 00:51:36,987 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [903403792] [2021-10-13 00:51:36,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:51:36,988 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 00:51:36,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 00:51:36,989 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 00:51:36,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-13 00:51:37,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:51:37,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 00:51:37,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:51:37,227 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 [2021-10-13 00:51:37,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 00:51:37,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:51:37,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-10-13 00:51:37,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:51:37,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:51:37,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:51:37,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-10-13 00:51:37,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:51:37,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:51:37,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:51:37,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-10-13 00:51:37,518 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 00:51:37,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2021-10-13 00:51:37,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:51:37,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 00:51:39,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:51:39,803 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 00:51:39,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [903403792] [2021-10-13 00:51:39,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [903403792] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 00:51:39,804 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:51:39,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 6] imperfect sequences [] total 10 [2021-10-13 00:51:39,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156846444] [2021-10-13 00:51:39,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-13 00:51:39,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 00:51:39,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-13 00:51:39,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=75, Unknown=1, NotChecked=0, Total=110 [2021-10-13 00:51:39,806 INFO L87 Difference]: Start difference. First operand 99 states and 106 transitions. Second operand has 11 states, 10 states have (on average 2.2) internal successors, (22), 11 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:41,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:51:41,336 INFO L93 Difference]: Finished difference Result 147 states and 158 transitions. [2021-10-13 00:51:41,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-13 00:51:41,337 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 11 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-10-13 00:51:41,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:51:41,338 INFO L225 Difference]: With dead ends: 147 [2021-10-13 00:51:41,339 INFO L226 Difference]: Without dead ends: 147 [2021-10-13 00:51:41,339 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 2646.7ms TimeCoverageRelationStatistics Valid=96, Invalid=175, Unknown=1, NotChecked=0, Total=272 [2021-10-13 00:51:41,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-10-13 00:51:41,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 101. [2021-10-13 00:51:41,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 71 states have (on average 1.4929577464788732) internal successors, (106), 97 states have internal predecessors, (106), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:41,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 109 transitions. [2021-10-13 00:51:41,344 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 109 transitions. Word has length 17 [2021-10-13 00:51:41,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:51:41,344 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 109 transitions. [2021-10-13 00:51:41,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 11 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:41,344 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 109 transitions. [2021-10-13 00:51:41,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-13 00:51:41,345 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:51:41,345 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:51:41,359 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-13 00:51:41,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 00:51:41,546 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr25REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 47 more)] === [2021-10-13 00:51:41,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:51:41,546 INFO L82 PathProgramCache]: Analyzing trace with hash 270609741, now seen corresponding path program 1 times [2021-10-13 00:51:41,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 00:51:41,546 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [940530105] [2021-10-13 00:51:41,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:51:41,547 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 00:51:41,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 00:51:41,547 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 00:51:41,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-13 00:51:41,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:51:41,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-13 00:51:41,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:51:41,760 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 [2021-10-13 00:51:41,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 00:51:41,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 00:51:41,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:51:41,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-10-13 00:51:41,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:51:41,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-10-13 00:51:41,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:51:41,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:51:41,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:51:41,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-10-13 00:51:41,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:51:41,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:51:42,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:51:42,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-10-13 00:51:42,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:51:42,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:51:42,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:51:42,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-10-13 00:51:42,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:51:42,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:51:42,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:51:42,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-10-13 00:51:42,282 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 00:51:42,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 36 [2021-10-13 00:51:42,288 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 00:51:42,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2021-10-13 00:51:42,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:51:42,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 00:51:43,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:51:43,464 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 00:51:43,464 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [940530105] [2021-10-13 00:51:43,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [940530105] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 00:51:43,465 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:51:43,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 6] imperfect sequences [] total 12 [2021-10-13 00:51:43,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629365142] [2021-10-13 00:51:43,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-13 00:51:43,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 00:51:43,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-13 00:51:43,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-10-13 00:51:43,467 INFO L87 Difference]: Start difference. First operand 101 states and 109 transitions. Second operand has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 13 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:46,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:51:46,374 INFO L93 Difference]: Finished difference Result 172 states and 183 transitions. [2021-10-13 00:51:46,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-13 00:51:46,375 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 13 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-10-13 00:51:46,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:51:46,376 INFO L225 Difference]: With dead ends: 172 [2021-10-13 00:51:46,376 INFO L226 Difference]: Without dead ends: 172 [2021-10-13 00:51:46,377 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1725.4ms TimeCoverageRelationStatistics Valid=134, Invalid=286, Unknown=0, NotChecked=0, Total=420 [2021-10-13 00:51:46,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-10-13 00:51:46,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 113. [2021-10-13 00:51:46,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 83 states have (on average 1.4939759036144578) internal successors, (124), 109 states have internal predecessors, (124), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:46,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 127 transitions. [2021-10-13 00:51:46,382 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 127 transitions. Word has length 17 [2021-10-13 00:51:46,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:51:46,382 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 127 transitions. [2021-10-13 00:51:46,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 13 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:51:46,383 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 127 transitions. [2021-10-13 00:51:46,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-13 00:51:46,384 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:51:46,384 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:51:46,393 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-13 00:51:46,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 00:51:46,591 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr14REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 47 more)] === [2021-10-13 00:51:46,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:51:46,591 INFO L82 PathProgramCache]: Analyzing trace with hash 656971329, now seen corresponding path program 1 times [2021-10-13 00:51:46,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 00:51:46,592 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [468608917] [2021-10-13 00:51:46,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:51:46,592 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 00:51:46,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 00:51:46,593 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 00:51:46,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-13 00:51:46,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:51:46,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 00:51:46,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:51:46,856 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 [2021-10-13 00:51:46,939 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-13 00:51:46,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 33 [2021-10-13 00:51:47,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-10-13 00:51:47,237 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-13 00:51:47,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 36 [2021-10-13 00:51:47,370 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-10-13 00:51:47,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 46 [2021-10-13 00:51:47,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:51:47,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 00:51:53,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:51:53,745 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 00:51:53,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [468608917] [2021-10-13 00:51:53,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [468608917] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 00:51:53,746 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:51:53,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 6] imperfect sequences [] total 13 [2021-10-13 00:51:53,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271061756] [2021-10-13 00:51:53,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-13 00:51:53,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 00:51:53,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-13 00:51:53,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=134, Unknown=3, NotChecked=0, Total=182 [2021-10-13 00:51:53,748 INFO L87 Difference]: Start difference. First operand 113 states and 127 transitions. Second operand has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 14 states have internal predecessors, (30), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:52:13,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:52:13,759 INFO L93 Difference]: Finished difference Result 121 states and 136 transitions. [2021-10-13 00:52:13,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-13 00:52:13,760 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 14 states have internal predecessors, (30), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-10-13 00:52:13,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:52:13,761 INFO L225 Difference]: With dead ends: 121 [2021-10-13 00:52:13,761 INFO L226 Difference]: Without dead ends: 121 [2021-10-13 00:52:13,762 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 6971.2ms TimeCoverageRelationStatistics Valid=171, Invalid=426, Unknown=3, NotChecked=0, Total=600 [2021-10-13 00:52:13,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-10-13 00:52:13,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 112. [2021-10-13 00:52:13,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 83 states have (on average 1.4819277108433735) internal successors, (123), 108 states have internal predecessors, (123), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:52:13,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 126 transitions. [2021-10-13 00:52:13,767 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 126 transitions. Word has length 19 [2021-10-13 00:52:13,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:52:13,767 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 126 transitions. [2021-10-13 00:52:13,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 14 states have internal predecessors, (30), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:52:13,768 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 126 transitions. [2021-10-13 00:52:13,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-13 00:52:13,768 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:52:13,769 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:52:13,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-13 00:52:13,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 00:52:13,981 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr15REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 47 more)] === [2021-10-13 00:52:13,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:52:13,981 INFO L82 PathProgramCache]: Analyzing trace with hash 656971330, now seen corresponding path program 1 times [2021-10-13 00:52:13,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 00:52:13,982 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [926734118] [2021-10-13 00:52:13,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:52:13,982 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 00:52:13,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 00:52:13,983 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 00:52:13,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-13 00:52:14,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:52:14,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-13 00:52:14,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:52:14,223 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 [2021-10-13 00:52:14,295 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 [2021-10-13 00:52:14,314 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 00:52:14,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-10-13 00:52:14,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 00:52:14,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-10-13 00:52:14,497 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-13 00:52:14,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 49 [2021-10-13 00:52:14,525 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-10-13 00:52:14,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 54 [2021-10-13 00:52:14,664 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-10-13 00:52:14,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 42 [2021-10-13 00:52:14,672 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-10-13 00:52:14,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 19 [2021-10-13 00:52:14,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:52:14,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 00:52:16,996 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|main_#t~mem6.offset| (_ BitVec 32))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_main_#t~mem6.base| (store (select |c_#memory_$Pointer$.offset| |c_main_#t~mem6.base|) (bvadd |main_#t~mem6.offset| (_ bv4 32)) c_main_~x~0.offset)) c_main_~x~0.base) c_main_~x~0.offset))) (bvule .cse0 (bvadd (_ bv4 32) .cse0)))) (forall ((|main_#t~mem6.offset| (_ BitVec 32))) (let ((.cse1 (bvadd |main_#t~mem6.offset| (_ bv4 32)))) (bvule (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| |c_main_#t~mem6.base| (store (select |c_#memory_$Pointer$.offset| |c_main_#t~mem6.base|) .cse1 c_main_~x~0.offset)) c_main_~x~0.base) c_main_~x~0.offset)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_main_#t~mem6.base| (store (select |c_#memory_$Pointer$.base| |c_main_#t~mem6.base|) .cse1 c_main_~x~0.base)) c_main_~x~0.base) c_main_~x~0.offset)))))) is different from false [2021-10-13 00:52:25,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 00:52:25,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 00:52:25,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:52:25,666 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 00:52:25,666 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [926734118] [2021-10-13 00:52:25,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [926734118] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 00:52:25,667 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:52:25,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 15 [2021-10-13 00:52:25,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983970200] [2021-10-13 00:52:25,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-13 00:52:25,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 00:52:25,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-13 00:52:25,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=171, Unknown=2, NotChecked=26, Total=240 [2021-10-13 00:52:25,668 INFO L87 Difference]: Start difference. First operand 112 states and 126 transitions. Second operand has 16 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 16 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:52:29,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:52:29,565 INFO L93 Difference]: Finished difference Result 114 states and 129 transitions. [2021-10-13 00:52:29,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-13 00:52:29,566 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 16 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-10-13 00:52:29,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:52:29,567 INFO L225 Difference]: With dead ends: 114 [2021-10-13 00:52:29,567 INFO L226 Difference]: Without dead ends: 114 [2021-10-13 00:52:29,568 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 8 SemanticMatches, 32 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 12134.3ms TimeCoverageRelationStatistics Valid=274, Invalid=784, Unknown=2, NotChecked=62, Total=1122 [2021-10-13 00:52:29,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-10-13 00:52:29,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 87. [2021-10-13 00:52:29,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 66 states have (on average 1.393939393939394) internal successors, (92), 83 states have internal predecessors, (92), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:52:29,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 95 transitions. [2021-10-13 00:52:29,572 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 95 transitions. Word has length 19 [2021-10-13 00:52:29,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:52:29,572 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 95 transitions. [2021-10-13 00:52:29,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 16 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:52:29,573 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 95 transitions. [2021-10-13 00:52:29,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-13 00:52:29,574 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:52:29,574 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:52:29,591 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-10-13 00:52:29,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 00:52:29,785 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr28REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 47 more)] === [2021-10-13 00:52:29,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:52:29,786 INFO L82 PathProgramCache]: Analyzing trace with hash 81264074, now seen corresponding path program 1 times [2021-10-13 00:52:29,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 00:52:29,786 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [416636125] [2021-10-13 00:52:29,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:52:29,786 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 00:52:29,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 00:52:29,787 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 00:52:29,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-13 00:52:30,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:52:30,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-13 00:52:30,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:52:30,054 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 [2021-10-13 00:52:30,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 00:52:30,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 00:52:30,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:52:30,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-10-13 00:52:30,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:52:30,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-10-13 00:52:30,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:52:30,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:52:30,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:52:30,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-10-13 00:52:30,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:52:30,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:52:30,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:52:30,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-10-13 00:52:30,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:52:30,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:52:30,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:52:30,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-10-13 00:52:30,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:52:30,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:52:30,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:52:30,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-10-13 00:52:30,528 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 00:52:30,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 42 [2021-10-13 00:52:30,805 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-10-13 00:52:30,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 27 [2021-10-13 00:52:30,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:52:30,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 00:52:36,859 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 00:52:36,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 1662 treesize of output 1587 [2021-10-13 00:52:36,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4519 treesize of output 4481 [2021-10-13 00:52:37,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 960 treesize of output 900 [2021-10-13 00:52:37,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:52:37,350 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 00:52:37,350 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [416636125] [2021-10-13 00:52:37,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [416636125] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 00:52:37,350 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:52:37,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 9] imperfect sequences [] total 15 [2021-10-13 00:52:37,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50979109] [2021-10-13 00:52:37,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-13 00:52:37,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 00:52:37,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-13 00:52:37,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=184, Unknown=2, NotChecked=0, Total=240 [2021-10-13 00:52:37,352 INFO L87 Difference]: Start difference. First operand 87 states and 95 transitions. Second operand has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 16 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:52:42,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:52:42,006 INFO L93 Difference]: Finished difference Result 149 states and 162 transitions. [2021-10-13 00:52:42,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-13 00:52:42,007 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 16 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-10-13 00:52:42,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:52:42,008 INFO L225 Difference]: With dead ends: 149 [2021-10-13 00:52:42,008 INFO L226 Difference]: Without dead ends: 149 [2021-10-13 00:52:42,008 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 8685.7ms TimeCoverageRelationStatistics Valid=138, Invalid=366, Unknown=2, NotChecked=0, Total=506 [2021-10-13 00:52:42,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-10-13 00:52:42,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 88. [2021-10-13 00:52:42,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 67 states have (on average 1.4029850746268657) internal successors, (94), 84 states have internal predecessors, (94), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:52:42,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 97 transitions. [2021-10-13 00:52:42,013 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 97 transitions. Word has length 20 [2021-10-13 00:52:42,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:52:42,014 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 97 transitions. [2021-10-13 00:52:42,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 16 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:52:42,015 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 97 transitions. [2021-10-13 00:52:42,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-13 00:52:42,016 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:52:42,016 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:52:42,036 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-10-13 00:52:42,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 00:52:42,231 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr29REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 47 more)] === [2021-10-13 00:52:42,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:52:42,231 INFO L82 PathProgramCache]: Analyzing trace with hash 81264075, now seen corresponding path program 1 times [2021-10-13 00:52:42,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 00:52:42,232 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1933252283] [2021-10-13 00:52:42,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:52:42,232 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 00:52:42,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 00:52:42,233 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 00:52:42,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-10-13 00:52:42,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:52:42,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-13 00:52:42,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:52:42,561 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 [2021-10-13 00:52:42,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 00:52:42,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 00:52:42,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:52:42,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-10-13 00:52:42,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:52:42,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-10-13 00:52:42,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:52:42,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:52:42,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:52:42,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-10-13 00:52:42,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:52:42,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:52:42,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:52:42,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-10-13 00:52:43,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:52:43,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:52:43,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:52:43,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-10-13 00:52:43,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:52:43,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:52:43,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:52:43,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-10-13 00:52:43,442 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-10-13 00:52:43,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 46 [2021-10-13 00:52:43,462 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-10-13 00:52:43,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 21 [2021-10-13 00:52:43,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:52:43,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 00:52:47,732 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 00:52:47,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1933252283] [2021-10-13 00:52:47,733 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: No corresponding IProgramVar for v_DerPreprocessor_14 [2021-10-13 00:52:47,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1233221370] [2021-10-13 00:52:47,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:52:47,733 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 00:52:47,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/cvc4 [2021-10-13 00:52:47,735 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 00:52:47,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-10-13 00:52:48,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:52:48,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-13 00:52:48,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:52:48,172 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 [2021-10-13 00:52:48,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 00:52:48,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:52:48,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-10-13 00:52:48,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:52:48,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:52:48,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:52:48,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-10-13 00:52:48,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-10-13 00:52:48,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:52:48,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:52:48,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:52:48,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-10-13 00:52:49,545 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-10-13 00:52:49,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 108 treesize of output 82 [2021-10-13 00:52:49,565 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-10-13 00:52:49,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 41 [2021-10-13 00:52:49,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:52:49,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 00:52:53,721 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 00:52:53,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 786 treesize of output 680 [2021-10-13 00:54:59,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 68 [2021-10-13 00:54:59,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:54:59,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1233221370] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 00:54:59,841 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:54:59,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 17 [2021-10-13 00:54:59,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679040980] [2021-10-13 00:54:59,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-13 00:54:59,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 00:54:59,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-13 00:54:59,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=625, Unknown=3, NotChecked=0, Total=756 [2021-10-13 00:54:59,843 INFO L87 Difference]: Start difference. First operand 88 states and 97 transitions. Second operand has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 18 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:55:19,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:55:19,624 INFO L93 Difference]: Finished difference Result 152 states and 163 transitions. [2021-10-13 00:55:19,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-13 00:55:19,626 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 18 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-10-13 00:55:19,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:55:19,627 INFO L225 Difference]: With dead ends: 152 [2021-10-13 00:55:19,627 INFO L226 Difference]: Without dead ends: 152 [2021-10-13 00:55:19,628 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 23952.0ms TimeCoverageRelationStatistics Valid=284, Invalid=1273, Unknown=3, NotChecked=0, Total=1560 [2021-10-13 00:55:19,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-10-13 00:55:19,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 88. [2021-10-13 00:55:19,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 67 states have (on average 1.3880597014925373) internal successors, (93), 84 states have internal predecessors, (93), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:55:19,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 96 transitions. [2021-10-13 00:55:19,632 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 96 transitions. Word has length 20 [2021-10-13 00:55:19,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:55:19,633 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 96 transitions. [2021-10-13 00:55:19,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 18 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:55:19,633 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 96 transitions. [2021-10-13 00:55:19,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-13 00:55:19,634 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:55:19,635 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:55:19,645 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-10-13 00:55:19,842 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-10-13 00:55:20,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/cvc4 --incremental --print-success --lang smt [2021-10-13 00:55:20,039 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr41REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 47 more)] === [2021-10-13 00:55:20,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:55:20,039 INFO L82 PathProgramCache]: Analyzing trace with hash -1775795772, now seen corresponding path program 1 times [2021-10-13 00:55:20,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 00:55:20,040 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [194217248] [2021-10-13 00:55:20,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:55:20,040 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 00:55:20,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 00:55:20,041 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 00:55:20,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-10-13 00:55:20,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:55:20,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 00:55:20,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:55:20,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-10-13 00:55:20,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:55:20,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 00:55:20,568 INFO L354 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2021-10-13 00:55:20,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-10-13 00:55:20,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:55:20,641 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 00:55:20,641 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [194217248] [2021-10-13 00:55:20,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [194217248] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 00:55:20,642 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:55:20,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 6 [2021-10-13 00:55:20,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605210752] [2021-10-13 00:55:20,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-13 00:55:20,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 00:55:20,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-13 00:55:20,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-13 00:55:20,644 INFO L87 Difference]: Start difference. First operand 88 states and 96 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:55:21,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:55:21,854 INFO L93 Difference]: Finished difference Result 122 states and 133 transitions. [2021-10-13 00:55:21,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-13 00:55:21,855 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-10-13 00:55:21,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:55:21,856 INFO L225 Difference]: With dead ends: 122 [2021-10-13 00:55:21,856 INFO L226 Difference]: Without dead ends: 122 [2021-10-13 00:55:21,856 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 242.7ms TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-10-13 00:55:21,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-10-13 00:55:21,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 89. [2021-10-13 00:55:21,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 68 states have (on average 1.3970588235294117) internal successors, (95), 85 states have internal predecessors, (95), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:55:21,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 98 transitions. [2021-10-13 00:55:21,861 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 98 transitions. Word has length 21 [2021-10-13 00:55:21,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:55:21,861 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 98 transitions. [2021-10-13 00:55:21,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:55:21,862 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 98 transitions. [2021-10-13 00:55:21,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-13 00:55:21,863 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:55:21,863 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:55:21,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-10-13 00:55:22,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 00:55:22,078 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr42REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 47 more)] === [2021-10-13 00:55:22,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:55:22,078 INFO L82 PathProgramCache]: Analyzing trace with hash -1775795771, now seen corresponding path program 1 times [2021-10-13 00:55:22,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 00:55:22,078 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1189575156] [2021-10-13 00:55:22,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:55:22,079 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 00:55:22,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 00:55:22,080 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 00:55:22,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-10-13 00:55:22,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:55:22,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 00:55:22,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:55:22,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 37 [2021-10-13 00:55:22,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2021-10-13 00:55:22,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:55:22,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 00:55:23,077 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 00:55:23,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 44 [2021-10-13 00:55:23,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:55:23,719 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 00:55:23,719 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1189575156] [2021-10-13 00:55:23,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1189575156] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 00:55:23,719 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:55:23,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2021-10-13 00:55:23,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308094363] [2021-10-13 00:55:23,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-13 00:55:23,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 00:55:23,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-13 00:55:23,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-10-13 00:55:23,724 INFO L87 Difference]: Start difference. First operand 89 states and 98 transitions. Second operand has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:55:26,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:55:26,155 INFO L93 Difference]: Finished difference Result 123 states and 133 transitions. [2021-10-13 00:55:26,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-13 00:55:26,156 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-10-13 00:55:26,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:55:26,157 INFO L225 Difference]: With dead ends: 123 [2021-10-13 00:55:26,157 INFO L226 Difference]: Without dead ends: 123 [2021-10-13 00:55:26,158 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 1150.0ms TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-10-13 00:55:26,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-10-13 00:55:26,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 89. [2021-10-13 00:55:26,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 68 states have (on average 1.3823529411764706) internal successors, (94), 85 states have internal predecessors, (94), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:55:26,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 97 transitions. [2021-10-13 00:55:26,162 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 97 transitions. Word has length 21 [2021-10-13 00:55:26,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:55:26,163 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 97 transitions. [2021-10-13 00:55:26,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:55:26,163 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 97 transitions. [2021-10-13 00:55:26,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-13 00:55:26,164 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:55:26,164 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:55:26,180 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-10-13 00:55:26,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 00:55:26,378 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr44REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 47 more)] === [2021-10-13 00:55:26,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:55:26,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1437714650, now seen corresponding path program 1 times [2021-10-13 00:55:26,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 00:55:26,378 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1888986142] [2021-10-13 00:55:26,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:55:26,379 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 00:55:26,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 00:55:26,379 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 00:55:26,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-10-13 00:55:26,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:55:26,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 00:55:26,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:55:26,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-10-13 00:55:26,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-10-13 00:55:26,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-10-13 00:55:27,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:55:27,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 00:55:27,162 INFO L354 Elim1Store]: treesize reduction 8, result has 65.2 percent of original size [2021-10-13 00:55:27,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2021-10-13 00:55:27,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:55:27,242 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 00:55:27,242 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1888986142] [2021-10-13 00:55:27,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1888986142] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 00:55:27,243 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:55:27,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 10 [2021-10-13 00:55:27,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073658056] [2021-10-13 00:55:27,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 00:55:27,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 00:55:27,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 00:55:27,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-10-13 00:55:27,244 INFO L87 Difference]: Start difference. First operand 89 states and 97 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:55:28,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:55:28,589 INFO L93 Difference]: Finished difference Result 123 states and 132 transitions. [2021-10-13 00:55:28,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-13 00:55:28,590 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2021-10-13 00:55:28,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:55:28,591 INFO L225 Difference]: With dead ends: 123 [2021-10-13 00:55:28,591 INFO L226 Difference]: Without dead ends: 123 [2021-10-13 00:55:28,592 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 439.9ms TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-10-13 00:55:28,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-10-13 00:55:28,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 95. [2021-10-13 00:55:28,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 74 states have (on average 1.3918918918918919) internal successors, (103), 91 states have internal predecessors, (103), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:55:28,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 106 transitions. [2021-10-13 00:55:28,595 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 106 transitions. Word has length 23 [2021-10-13 00:55:28,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:55:28,595 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 106 transitions. [2021-10-13 00:55:28,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:55:28,596 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 106 transitions. [2021-10-13 00:55:28,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-13 00:55:28,596 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:55:28,596 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:55:28,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-10-13 00:55:28,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 00:55:28,799 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr48ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 47 more)] === [2021-10-13 00:55:28,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:55:28,799 INFO L82 PathProgramCache]: Analyzing trace with hash -1437714701, now seen corresponding path program 1 times [2021-10-13 00:55:28,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 00:55:28,800 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [900915248] [2021-10-13 00:55:28,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:55:28,800 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 00:55:28,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 00:55:28,801 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 00:55:28,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-10-13 00:55:29,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:55:29,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-13 00:55:29,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:55:29,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 00:55:29,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 00:55:29,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:55:29,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-10-13 00:55:29,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:55:29,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-10-13 00:55:29,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:55:29,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:55:29,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:55:29,372 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 00:55:29,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 23 [2021-10-13 00:55:29,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:55:29,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:55:29,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:55:29,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-10-13 00:55:29,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-13 00:55:29,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:55:29,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:55:29,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:55:29,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-10-13 00:55:29,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:55:29,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:55:29,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:55:29,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-10-13 00:55:29,701 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 00:55:29,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 38 [2021-10-13 00:55:29,707 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 00:55:29,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-10-13 00:55:29,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-13 00:55:29,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:55:29,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 00:55:30,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 91 [2021-10-13 00:55:30,603 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 00:55:30,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [900915248] [2021-10-13 00:55:30,603 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: No corresponding IProgramVar for v_DerPreprocessor_20 [2021-10-13 00:55:30,604 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1143290541] [2021-10-13 00:55:30,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:55:30,604 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 00:55:30,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/cvc4 [2021-10-13 00:55:30,619 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 00:55:30,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-10-13 00:55:31,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:55:31,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 00:55:31,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:55:31,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 00:55:31,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:55:31,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-10-13 00:55:31,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:55:31,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:55:31,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:55:31,302 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 00:55:31,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 23 [2021-10-13 00:55:31,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:55:31,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:55:31,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:55:31,448 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 00:55:31,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 23 [2021-10-13 00:55:31,591 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 00:55:31,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 10 [2021-10-13 00:55:31,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:55:31,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 00:55:32,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:55:32,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1143290541] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 00:55:32,120 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:55:32,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 6] imperfect sequences [] total 9 [2021-10-13 00:55:32,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650885329] [2021-10-13 00:55:32,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 00:55:32,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 00:55:32,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 00:55:32,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-10-13 00:55:32,122 INFO L87 Difference]: Start difference. First operand 95 states and 106 transitions. Second operand has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 10 states have internal predecessors, (33), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:55:32,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:55:32,898 INFO L93 Difference]: Finished difference Result 143 states and 156 transitions. [2021-10-13 00:55:32,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-13 00:55:32,898 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 10 states have internal predecessors, (33), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2021-10-13 00:55:32,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:55:32,899 INFO L225 Difference]: With dead ends: 143 [2021-10-13 00:55:32,900 INFO L226 Difference]: Without dead ends: 143 [2021-10-13 00:55:32,900 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 57 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 1481.2ms TimeCoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2021-10-13 00:55:32,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-10-13 00:55:32,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 121. [2021-10-13 00:55:32,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 100 states have (on average 1.41) internal successors, (141), 117 states have internal predecessors, (141), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:55:32,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 144 transitions. [2021-10-13 00:55:32,906 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 144 transitions. Word has length 23 [2021-10-13 00:55:32,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:55:32,906 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 144 transitions. [2021-10-13 00:55:32,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 10 states have internal predecessors, (33), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:55:32,907 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 144 transitions. [2021-10-13 00:55:32,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-13 00:55:32,908 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:55:32,908 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:55:32,920 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-10-13 00:55:33,120 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-10-13 00:55:33,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 00:55:33,313 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr18ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 47 more)] === [2021-10-13 00:55:33,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:55:33,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1734675453, now seen corresponding path program 1 times [2021-10-13 00:55:33,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 00:55:33,314 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1191962519] [2021-10-13 00:55:33,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:55:33,314 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 00:55:33,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 00:55:33,315 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 00:55:33,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-10-13 00:55:33,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:55:33,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 00:55:33,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:55:33,847 INFO L354 Elim1Store]: treesize reduction 41, result has 25.5 percent of original size [2021-10-13 00:55:33,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 27 [2021-10-13 00:55:33,995 INFO L354 Elim1Store]: treesize reduction 30, result has 36.2 percent of original size [2021-10-13 00:55:33,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 36 [2021-10-13 00:55:34,160 INFO L354 Elim1Store]: treesize reduction 30, result has 36.2 percent of original size [2021-10-13 00:55:34,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 37 [2021-10-13 00:55:34,370 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-10-13 00:55:34,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 26 [2021-10-13 00:55:34,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:55:34,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 00:55:34,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:55:34,678 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 00:55:34,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1191962519] [2021-10-13 00:55:34,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1191962519] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 00:55:34,678 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:55:34,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-10-13 00:55:34,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330042600] [2021-10-13 00:55:34,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 00:55:34,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 00:55:34,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 00:55:34,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:55:34,683 INFO L87 Difference]: Start difference. First operand 121 states and 144 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-13 00:55:34,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:55:34,990 INFO L93 Difference]: Finished difference Result 120 states and 143 transitions. [2021-10-13 00:55:34,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 00:55:34,991 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2021-10-13 00:55:34,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:55:34,992 INFO L225 Difference]: With dead ends: 120 [2021-10-13 00:55:34,992 INFO L226 Difference]: Without dead ends: 120 [2021-10-13 00:55:34,993 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 161.4ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-10-13 00:55:34,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-10-13 00:55:34,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2021-10-13 00:55:34,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 99 states have (on average 1.404040404040404) internal successors, (139), 115 states have internal predecessors, (139), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:55:34,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 142 transitions. [2021-10-13 00:55:34,998 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 142 transitions. Word has length 23 [2021-10-13 00:55:34,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:55:34,999 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 142 transitions. [2021-10-13 00:55:34,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-13 00:55:35,000 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 142 transitions. [2021-10-13 00:55:35,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-13 00:55:35,001 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:55:35,001 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:55:35,019 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2021-10-13 00:55:35,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 00:55:35,219 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr36ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 47 more)] === [2021-10-13 00:55:35,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:55:35,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1175794259, now seen corresponding path program 1 times [2021-10-13 00:55:35,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 00:55:35,220 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1214780283] [2021-10-13 00:55:35,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:55:35,220 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 00:55:35,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 00:55:35,221 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 00:55:35,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-10-13 00:55:35,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:55:35,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 00:55:35,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:55:35,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:55:35,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 00:55:35,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:55:35,753 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 00:55:35,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1214780283] [2021-10-13 00:55:35,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1214780283] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 00:55:35,754 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:55:35,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-13 00:55:35,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485154682] [2021-10-13 00:55:35,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 00:55:35,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 00:55:35,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 00:55:35,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 00:55:35,755 INFO L87 Difference]: Start difference. First operand 119 states and 142 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:55:35,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:55:35,770 INFO L93 Difference]: Finished difference Result 121 states and 144 transitions. [2021-10-13 00:55:35,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 00:55:35,771 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2021-10-13 00:55:35,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:55:35,772 INFO L225 Difference]: With dead ends: 121 [2021-10-13 00:55:35,772 INFO L226 Difference]: Without dead ends: 121 [2021-10-13 00:55:35,772 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 00:55:35,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-10-13 00:55:35,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2021-10-13 00:55:35,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 101 states have (on average 1.396039603960396) internal successors, (141), 117 states have internal predecessors, (141), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:55:35,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 144 transitions. [2021-10-13 00:55:35,776 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 144 transitions. Word has length 24 [2021-10-13 00:55:35,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:55:35,777 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 144 transitions. [2021-10-13 00:55:35,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:55:35,777 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 144 transitions. [2021-10-13 00:55:35,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-13 00:55:35,778 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:55:35,778 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:55:35,796 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-10-13 00:55:35,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 00:55:35,978 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr49ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 47 more)] === [2021-10-13 00:55:35,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:55:35,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1619482515, now seen corresponding path program 1 times [2021-10-13 00:55:35,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 00:55:35,979 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1114469096] [2021-10-13 00:55:35,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:55:35,980 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 00:55:35,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 00:55:35,981 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 00:55:35,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-10-13 00:55:36,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:55:36,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-13 00:55:36,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:55:36,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 00:55:36,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:55:36,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-10-13 00:55:36,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:55:36,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:55:36,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:55:36,625 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 00:55:36,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 23 [2021-10-13 00:55:36,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-13 00:55:36,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:55:36,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:55:36,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:55:36,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-10-13 00:55:36,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:55:36,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2021-10-13 00:55:37,113 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 00:55:37,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2021-10-13 00:55:37,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-10-13 00:55:37,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:55:37,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 00:55:37,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2021-10-13 00:55:37,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 59 [2021-10-13 00:55:37,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:55:37,885 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 00:55:37,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1114469096] [2021-10-13 00:55:37,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1114469096] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 00:55:37,885 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:55:37,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13, 12] imperfect sequences [] total 19 [2021-10-13 00:55:37,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347672295] [2021-10-13 00:55:37,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-13 00:55:37,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 00:55:37,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-13 00:55:37,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-10-13 00:55:37,887 INFO L87 Difference]: Start difference. First operand 121 states and 144 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:55:39,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:55:39,893 INFO L93 Difference]: Finished difference Result 152 states and 166 transitions. [2021-10-13 00:55:39,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-13 00:55:39,894 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2021-10-13 00:55:39,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:55:39,895 INFO L225 Difference]: With dead ends: 152 [2021-10-13 00:55:39,895 INFO L226 Difference]: Without dead ends: 147 [2021-10-13 00:55:39,896 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1304.6ms TimeCoverageRelationStatistics Valid=164, Invalid=538, Unknown=0, NotChecked=0, Total=702 [2021-10-13 00:55:39,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-10-13 00:55:39,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 117. [2021-10-13 00:55:39,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 97 states have (on average 1.402061855670103) internal successors, (136), 113 states have internal predecessors, (136), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:55:39,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 139 transitions. [2021-10-13 00:55:39,901 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 139 transitions. Word has length 24 [2021-10-13 00:55:39,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:55:39,901 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 139 transitions. [2021-10-13 00:55:39,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:55:39,902 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 139 transitions. [2021-10-13 00:55:39,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-13 00:55:39,902 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:55:39,903 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:55:39,923 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-10-13 00:55:40,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 00:55:40,123 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr34REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 47 more)] === [2021-10-13 00:55:40,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:55:40,124 INFO L82 PathProgramCache]: Analyzing trace with hash -2089836745, now seen corresponding path program 1 times [2021-10-13 00:55:40,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 00:55:40,124 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2056445228] [2021-10-13 00:55:40,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:55:40,125 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 00:55:40,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 00:55:40,126 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 00:55:40,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-10-13 00:55:40,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:55:40,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 00:55:40,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:55:40,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-10-13 00:55:40,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:55:40,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 00:55:40,754 INFO L354 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2021-10-13 00:55:40,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2021-10-13 00:55:40,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:55:40,808 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 00:55:40,809 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2056445228] [2021-10-13 00:55:40,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2056445228] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 00:55:40,809 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:55:40,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-13 00:55:40,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005267040] [2021-10-13 00:55:40,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 00:55:40,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 00:55:40,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 00:55:40,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:55:40,810 INFO L87 Difference]: Start difference. First operand 117 states and 139 transitions. Second operand has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:55:41,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:55:41,233 INFO L93 Difference]: Finished difference Result 116 states and 137 transitions. [2021-10-13 00:55:41,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 00:55:41,243 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2021-10-13 00:55:41,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:55:41,244 INFO L225 Difference]: With dead ends: 116 [2021-10-13 00:55:41,244 INFO L226 Difference]: Without dead ends: 116 [2021-10-13 00:55:41,244 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 65.9ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-13 00:55:41,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-10-13 00:55:41,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2021-10-13 00:55:41,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 97 states have (on average 1.3814432989690721) internal successors, (134), 112 states have internal predecessors, (134), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:55:41,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 137 transitions. [2021-10-13 00:55:41,248 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 137 transitions. Word has length 25 [2021-10-13 00:55:41,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:55:41,248 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 137 transitions. [2021-10-13 00:55:41,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:55:41,249 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 137 transitions. [2021-10-13 00:55:41,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-13 00:55:41,249 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:55:41,250 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:55:41,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-10-13 00:55:41,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 00:55:41,458 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr35REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 47 more)] === [2021-10-13 00:55:41,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:55:41,459 INFO L82 PathProgramCache]: Analyzing trace with hash -2089836744, now seen corresponding path program 1 times [2021-10-13 00:55:41,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 00:55:41,459 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [139848966] [2021-10-13 00:55:41,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:55:41,459 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 00:55:41,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 00:55:41,460 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 00:55:41,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-10-13 00:55:41,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:55:41,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 00:55:41,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:55:42,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 37 [2021-10-13 00:55:42,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2021-10-13 00:55:42,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:55:42,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 00:55:42,337 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 00:55:42,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 44 [2021-10-13 00:55:42,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:55:42,678 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 00:55:42,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [139848966] [2021-10-13 00:55:42,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [139848966] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 00:55:42,679 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:55:42,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-10-13 00:55:42,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199629298] [2021-10-13 00:55:42,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 00:55:42,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 00:55:42,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 00:55:42,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-13 00:55:42,680 INFO L87 Difference]: Start difference. First operand 116 states and 137 transitions. Second operand has 6 states, 5 states have (on average 4.8) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:55:43,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:55:43,641 INFO L93 Difference]: Finished difference Result 115 states and 135 transitions. [2021-10-13 00:55:43,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 00:55:43,643 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2021-10-13 00:55:43,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:55:43,644 INFO L225 Difference]: With dead ends: 115 [2021-10-13 00:55:43,644 INFO L226 Difference]: Without dead ends: 115 [2021-10-13 00:55:43,644 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 349.3ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-13 00:55:43,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-10-13 00:55:43,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2021-10-13 00:55:43,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 97 states have (on average 1.3608247422680413) internal successors, (132), 111 states have internal predecessors, (132), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:55:43,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 135 transitions. [2021-10-13 00:55:43,649 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 135 transitions. Word has length 25 [2021-10-13 00:55:43,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:55:43,649 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 135 transitions. [2021-10-13 00:55:43,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:55:43,650 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 135 transitions. [2021-10-13 00:55:43,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-13 00:55:43,650 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:55:43,651 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:55:43,685 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-10-13 00:55:43,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 00:55:43,885 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr24REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 47 more)] === [2021-10-13 00:55:43,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:55:43,886 INFO L82 PathProgramCache]: Analyzing trace with hash 1670584664, now seen corresponding path program 1 times [2021-10-13 00:55:43,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 00:55:43,886 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [252267828] [2021-10-13 00:55:43,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:55:43,886 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 00:55:43,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 00:55:43,887 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 00:55:43,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-10-13 00:55:44,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:55:44,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 00:55:44,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:55:44,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-10-13 00:55:44,492 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:55:44,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 00:55:44,577 INFO L354 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2021-10-13 00:55:44,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2021-10-13 00:55:44,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:55:44,621 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 00:55:44,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [252267828] [2021-10-13 00:55:44,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [252267828] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 00:55:44,621 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:55:44,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-10-13 00:55:44,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927834007] [2021-10-13 00:55:44,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 00:55:44,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 00:55:44,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 00:55:44,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-13 00:55:44,623 INFO L87 Difference]: Start difference. First operand 115 states and 135 transitions. Second operand has 6 states, 5 states have (on average 4.8) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:55:45,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:55:45,315 INFO L93 Difference]: Finished difference Result 117 states and 134 transitions. [2021-10-13 00:55:45,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 00:55:45,316 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2021-10-13 00:55:45,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:55:45,317 INFO L225 Difference]: With dead ends: 117 [2021-10-13 00:55:45,318 INFO L226 Difference]: Without dead ends: 117 [2021-10-13 00:55:45,318 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 158.2ms TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-10-13 00:55:45,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-10-13 00:55:45,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 115. [2021-10-13 00:55:45,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 97 states have (on average 1.3402061855670102) internal successors, (130), 111 states have internal predecessors, (130), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:55:45,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 133 transitions. [2021-10-13 00:55:45,323 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 133 transitions. Word has length 27 [2021-10-13 00:55:45,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:55:45,323 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 133 transitions. [2021-10-13 00:55:45,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:55:45,323 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 133 transitions. [2021-10-13 00:55:45,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-13 00:55:45,324 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:55:45,324 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:55:45,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-10-13 00:55:45,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 00:55:45,535 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr25REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 47 more)] === [2021-10-13 00:55:45,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:55:45,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1670584665, now seen corresponding path program 1 times [2021-10-13 00:55:45,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 00:55:45,536 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [652793828] [2021-10-13 00:55:45,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:55:45,536 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 00:55:45,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 00:55:45,537 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 00:55:45,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-10-13 00:55:46,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:55:46,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 00:55:46,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:55:46,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 37 [2021-10-13 00:55:46,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2021-10-13 00:55:46,392 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:55:46,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 00:55:46,551 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 00:55:46,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 44 [2021-10-13 00:55:46,876 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:55:46,876 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 00:55:46,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [652793828] [2021-10-13 00:55:46,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [652793828] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 00:55:46,877 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:55:46,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 6 [2021-10-13 00:55:46,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787148198] [2021-10-13 00:55:46,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-13 00:55:46,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 00:55:46,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-13 00:55:46,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-10-13 00:55:46,878 INFO L87 Difference]: Start difference. First operand 115 states and 133 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 7 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:55:48,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:55:48,463 INFO L93 Difference]: Finished difference Result 116 states and 132 transitions. [2021-10-13 00:55:48,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 00:55:48,464 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 7 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2021-10-13 00:55:48,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:55:48,465 INFO L225 Difference]: With dead ends: 116 [2021-10-13 00:55:48,465 INFO L226 Difference]: Without dead ends: 116 [2021-10-13 00:55:48,465 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 700.3ms TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-10-13 00:55:48,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-10-13 00:55:48,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2021-10-13 00:55:48,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 97 states have (on average 1.3195876288659794) internal successors, (128), 111 states have internal predecessors, (128), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:55:48,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 131 transitions. [2021-10-13 00:55:48,469 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 131 transitions. Word has length 27 [2021-10-13 00:55:48,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:55:48,469 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 131 transitions. [2021-10-13 00:55:48,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 7 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:55:48,470 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 131 transitions. [2021-10-13 00:55:48,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-13 00:55:48,470 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:55:48,470 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:55:48,480 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-10-13 00:55:48,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 00:55:48,671 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr23ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 47 more)] === [2021-10-13 00:55:48,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:55:48,671 INFO L82 PathProgramCache]: Analyzing trace with hash -1114168378, now seen corresponding path program 1 times [2021-10-13 00:55:48,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 00:55:48,672 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1280588157] [2021-10-13 00:55:48,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:55:48,672 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 00:55:48,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 00:55:48,673 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 00:55:48,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-10-13 00:55:49,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:55:49,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 00:55:49,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:55:49,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:55:49,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 00:55:49,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:55:49,428 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 00:55:49,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1280588157] [2021-10-13 00:55:49,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1280588157] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 00:55:49,429 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:55:49,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-13 00:55:49,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948828838] [2021-10-13 00:55:49,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 00:55:49,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 00:55:49,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 00:55:49,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 00:55:49,430 INFO L87 Difference]: Start difference. First operand 115 states and 131 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:55:49,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:55:49,490 INFO L93 Difference]: Finished difference Result 186 states and 207 transitions. [2021-10-13 00:55:49,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 00:55:49,491 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2021-10-13 00:55:49,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:55:49,493 INFO L225 Difference]: With dead ends: 186 [2021-10-13 00:55:49,493 INFO L226 Difference]: Without dead ends: 186 [2021-10-13 00:55:49,494 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 00:55:49,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-10-13 00:55:49,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 129. [2021-10-13 00:55:49,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 111 states have (on average 1.2972972972972974) internal successors, (144), 125 states have internal predecessors, (144), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:55:49,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 147 transitions. [2021-10-13 00:55:49,500 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 147 transitions. Word has length 27 [2021-10-13 00:55:49,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:55:49,501 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 147 transitions. [2021-10-13 00:55:49,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:55:49,501 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 147 transitions. [2021-10-13 00:55:49,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-13 00:55:49,502 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:55:49,502 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:55:49,522 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-10-13 00:55:49,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 00:55:49,721 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr36ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 47 more)] === [2021-10-13 00:55:49,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:55:49,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1519591669, now seen corresponding path program 1 times [2021-10-13 00:55:49,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 00:55:49,722 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1735465546] [2021-10-13 00:55:49,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:55:49,722 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 00:55:49,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 00:55:49,723 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 00:55:49,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-10-13 00:55:50,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:55:50,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-13 00:55:50,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:55:50,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 00:55:50,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 00:55:50,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:55:50,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-10-13 00:55:50,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:55:50,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-10-13 00:55:50,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:55:50,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:55:50,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:55:50,474 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 00:55:50,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 23 [2021-10-13 00:55:50,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:55:50,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:55:50,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:55:50,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-10-13 00:55:50,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:55:50,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:55:50,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:55:50,673 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 00:55:50,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 23 [2021-10-13 00:55:50,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-13 00:55:50,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:55:50,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:55:50,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:55:50,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-10-13 00:55:53,549 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-10-13 00:55:53,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 83 treesize of output 61 [2021-10-13 00:55:53,565 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-10-13 00:55:53,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 32 [2021-10-13 00:55:53,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-10-13 00:55:53,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:55:53,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 00:55:54,484 INFO L354 Elim1Store]: treesize reduction 8, result has 83.0 percent of original size [2021-10-13 00:55:54,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 298 treesize of output 249 [2021-10-13 00:56:07,851 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 00:56:07,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1735465546] [2021-10-13 00:56:07,851 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: No corresponding IProgramVar for v_prenex_3 [2021-10-13 00:56:07,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [406762326] [2021-10-13 00:56:07,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:56:07,851 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 00:56:07,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/cvc4 [2021-10-13 00:56:07,855 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 00:56:07,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-10-13 00:56:08,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:56:08,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-13 00:56:08,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:56:08,913 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 [2021-10-13 00:56:09,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 00:56:09,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:56:09,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-10-13 00:56:09,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:56:09,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:56:09,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:56:09,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-10-13 00:56:09,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-13 00:56:09,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:56:09,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:56:09,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:56:09,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-10-13 00:56:09,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-10-13 00:56:24,043 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-10-13 00:56:24,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 132 treesize of output 102 [2021-10-13 00:56:24,060 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-10-13 00:56:24,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 57 [2021-10-13 00:56:24,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 42 [2021-10-13 00:56:24,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-10-13 00:56:24,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:56:24,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 00:56:32,841 INFO L354 Elim1Store]: treesize reduction 8, result has 83.0 percent of original size [2021-10-13 00:56:32,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 360 treesize of output 311 [2021-10-13 00:56:33,137 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 00:56:33,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 1368 treesize of output 1226 [2021-10-13 00:58:18,949 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: No corresponding IProgramVar for v_DerPreprocessor_32 [2021-10-13 00:58:18,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135023353] [2021-10-13 00:58:18,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:58:18,950 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:58:18,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:58:18,955 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:58:18,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-10-13 00:58:19,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:58:19,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-13 00:58:19,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:58:19,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 00:58:19,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 00:58:19,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:58:19,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-10-13 00:58:19,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:58:19,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-10-13 00:58:19,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:58:19,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:58:19,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:58:19,729 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 00:58:19,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 23 [2021-10-13 00:58:19,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:58:19,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:58:19,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:58:19,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-10-13 00:58:19,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-13 00:58:19,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:58:19,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:58:19,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:58:19,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-10-13 00:58:19,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:58:19,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:58:19,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:58:19,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-10-13 00:58:20,346 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-10-13 00:58:20,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 83 treesize of output 61 [2021-10-13 00:58:20,359 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-10-13 00:58:20,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 32 [2021-10-13 00:58:20,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-10-13 00:58:20,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:58:20,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 00:58:20,583 INFO L354 Elim1Store]: treesize reduction 8, result has 83.0 percent of original size [2021-10-13 00:58:20,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 298 treesize of output 249 [2021-10-13 00:58:30,570 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: No corresponding IProgramVar for v_prenex_10 [2021-10-13 00:58:30,570 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:58:30,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-10-13 00:58:30,571 ERROR L172 FreeRefinementEngine]: Strategy WOLF failed to provide any proof altough trace is infeasible [2021-10-13 00:58:30,571 INFO L626 BasicCegarLoop]: Counterexample might be feasible [2021-10-13 00:58:30,577 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr36ASSERT_VIOLATIONMEMORY_LEAK [2021-10-13 00:58:30,580 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION [2021-10-13 00:58:30,580 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION [2021-10-13 00:58:30,581 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2REQUIRES_VIOLATION [2021-10-13 00:58:30,581 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3REQUIRES_VIOLATION [2021-10-13 00:58:30,581 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4REQUIRES_VIOLATION [2021-10-13 00:58:30,581 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr5REQUIRES_VIOLATION [2021-10-13 00:58:30,581 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr6REQUIRES_VIOLATION [2021-10-13 00:58:30,582 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr7REQUIRES_VIOLATION [2021-10-13 00:58:30,582 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr8REQUIRES_VIOLATION [2021-10-13 00:58:30,582 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr9REQUIRES_VIOLATION [2021-10-13 00:58:30,582 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr10REQUIRES_VIOLATION [2021-10-13 00:58:30,582 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr11REQUIRES_VIOLATION [2021-10-13 00:58:30,583 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr12REQUIRES_VIOLATION [2021-10-13 00:58:30,583 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr13REQUIRES_VIOLATION [2021-10-13 00:58:30,583 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr14REQUIRES_VIOLATION [2021-10-13 00:58:30,583 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr15REQUIRES_VIOLATION [2021-10-13 00:58:30,584 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr16REQUIRES_VIOLATION [2021-10-13 00:58:30,584 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr17REQUIRES_VIOLATION [2021-10-13 00:58:30,584 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr18ASSERT_VIOLATIONMEMORY_LEAK [2021-10-13 00:58:30,584 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr19REQUIRES_VIOLATION [2021-10-13 00:58:30,584 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr20REQUIRES_VIOLATION [2021-10-13 00:58:30,585 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr21REQUIRES_VIOLATION [2021-10-13 00:58:30,585 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr22REQUIRES_VIOLATION [2021-10-13 00:58:30,585 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr23ASSERT_VIOLATIONMEMORY_LEAK [2021-10-13 00:58:30,585 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr24REQUIRES_VIOLATION [2021-10-13 00:58:30,586 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr25REQUIRES_VIOLATION [2021-10-13 00:58:30,586 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr26REQUIRES_VIOLATION [2021-10-13 00:58:30,586 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr27REQUIRES_VIOLATION [2021-10-13 00:58:30,586 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr28REQUIRES_VIOLATION [2021-10-13 00:58:30,586 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr29REQUIRES_VIOLATION [2021-10-13 00:58:30,587 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr30REQUIRES_VIOLATION [2021-10-13 00:58:30,587 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr31REQUIRES_VIOLATION [2021-10-13 00:58:30,587 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr32REQUIRES_VIOLATION [2021-10-13 00:58:30,587 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr33REQUIRES_VIOLATION [2021-10-13 00:58:30,587 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr34REQUIRES_VIOLATION [2021-10-13 00:58:30,588 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr35REQUIRES_VIOLATION [2021-10-13 00:58:30,588 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr37REQUIRES_VIOLATION [2021-10-13 00:58:30,588 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr38REQUIRES_VIOLATION [2021-10-13 00:58:30,588 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr39REQUIRES_VIOLATION [2021-10-13 00:58:30,589 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr40REQUIRES_VIOLATION [2021-10-13 00:58:30,589 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr41REQUIRES_VIOLATION [2021-10-13 00:58:30,589 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr42REQUIRES_VIOLATION [2021-10-13 00:58:30,589 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr43REQUIRES_VIOLATION [2021-10-13 00:58:30,589 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr44REQUIRES_VIOLATION [2021-10-13 00:58:30,590 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr45ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 00:58:30,590 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr46ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 00:58:30,590 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr47ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 00:58:30,590 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr48ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 00:58:30,591 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr49ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 00:58:30,591 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr50ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 00:58:30,591 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr51ENSURES_VIOLATIONMEMORY_LEAK [2021-10-13 00:58:30,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2021-10-13 00:58:30,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-10-13 00:58:31,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-10-13 00:58:31,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/cvc4 --incremental --print-success --lang smt,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 00:58:31,220 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 00:58:31,238 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 12:58:31 BoogieIcfgContainer [2021-10-13 00:58:31,238 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 00:58:31,240 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 00:58:31,240 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 00:58:31,241 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 00:58:31,241 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:51:28" (3/4) ... [2021-10-13 00:58:31,244 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-13 00:58:31,245 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 00:58:31,246 INFO L168 Benchmark]: Toolchain (without parser) took 424962.95 ms. Allocated memory was 60.8 MB in the beginning and 92.3 MB in the end (delta: 31.5 MB). Free memory was 36.7 MB in the beginning and 28.8 MB in the end (delta: 8.0 MB). Peak memory consumption was 39.7 MB. Max. memory is 16.1 GB. [2021-10-13 00:58:31,246 INFO L168 Benchmark]: CDTParser took 0.34 ms. Allocated memory is still 60.8 MB. Free memory is still 41.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 00:58:31,247 INFO L168 Benchmark]: CACSL2BoogieTranslator took 652.77 ms. Allocated memory is still 60.8 MB. Free memory was 36.6 MB in the beginning and 35.8 MB in the end (delta: 811.7 kB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-13 00:58:31,248 INFO L168 Benchmark]: Boogie Preprocessor took 76.71 ms. Allocated memory is still 60.8 MB. Free memory was 35.8 MB in the beginning and 32.6 MB in the end (delta: 3.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 00:58:31,248 INFO L168 Benchmark]: RCFGBuilder took 1091.45 ms. Allocated memory was 60.8 MB in the beginning and 75.5 MB in the end (delta: 14.7 MB). Free memory was 32.6 MB in the beginning and 36.7 MB in the end (delta: -4.1 MB). Peak memory consumption was 12.7 MB. Max. memory is 16.1 GB. [2021-10-13 00:58:31,249 INFO L168 Benchmark]: TraceAbstraction took 423126.25 ms. Allocated memory was 75.5 MB in the beginning and 92.3 MB in the end (delta: 16.8 MB). Free memory was 36.4 MB in the beginning and 29.4 MB in the end (delta: 7.0 MB). Peak memory consumption was 23.2 MB. Max. memory is 16.1 GB. [2021-10-13 00:58:31,249 INFO L168 Benchmark]: Witness Printer took 4.78 ms. Allocated memory is still 92.3 MB. Free memory is still 28.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 00:58:31,251 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34 ms. Allocated memory is still 60.8 MB. Free memory is still 41.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 652.77 ms. Allocated memory is still 60.8 MB. Free memory was 36.6 MB in the beginning and 35.8 MB in the end (delta: 811.7 kB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 76.71 ms. Allocated memory is still 60.8 MB. Free memory was 35.8 MB in the beginning and 32.6 MB in the end (delta: 3.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1091.45 ms. Allocated memory was 60.8 MB in the beginning and 75.5 MB in the end (delta: 14.7 MB). Free memory was 32.6 MB in the beginning and 36.7 MB in the end (delta: -4.1 MB). Peak memory consumption was 12.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 423126.25 ms. Allocated memory was 75.5 MB in the beginning and 92.3 MB in the end (delta: 16.8 MB). Free memory was 36.4 MB in the beginning and 29.4 MB in the end (delta: 7.0 MB). Peak memory consumption was 23.2 MB. Max. memory is 16.1 GB. * Witness Printer took 4.78 ms. Allocated memory is still 92.3 MB. Free memory is still 28.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 1035]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: unable to decide satisfiability of path constraint, overapproximation of memtrack at line 1035. Possible FailurePath: [L997] SLL* head = malloc(sizeof(SLL)); [L998] head->next = head [L999] head->prev = ((void*)0) [L1000] head->data = 0 [L1002] SLL* x = head; [L1003] int state = 1; [L1006] COND FALSE !(__VERIFIER_nondet_int()) [L1028] x->data = state [L1030] EXPR head->next [L1030] x = head->next [L1031] COND FALSE !(!(((void*)0) != x)) [L1033] EXPR x->data [L1033] COND TRUE x->data != 0 [L1035] EXPR x->next [L1035] EXPR x->next->data [L1035] EXPR x->next->data == 0 || x->data <= x->next->data [L1035] EXPR x->data [L1035] EXPR x->next [L1035] EXPR x->next->data [L1035] EXPR x->next->data == 0 || x->data <= x->next->data [L1035] COND TRUE !(x->next->data == 0 || x->data <= x->next->data) [L1035] reach_error() - UnprovableResult [Line: 998]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 998]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 999]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 999]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1000]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1000]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1009]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1009]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1010]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1010]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1010]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1010]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1011]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1011]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1012]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1012]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1024]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1024]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1026]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1028]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1028]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1030]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1030]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1031]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1033]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1033]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1035]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1035]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1035]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1035]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1035]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1035]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1035]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1035]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1035]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1035]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1036]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1036]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1039]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1039]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1041]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1041]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1044]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1044]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1045]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1045]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1045]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1047]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1047]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1047]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 994]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 124 locations, 52 error locations. Started 1 CEGAR loops. OverallTime: 423026.9ms, OverallIterations: 26, TraceHistogramMax: 1, EmptinessCheckTime: 31.9ms, AutomataDifference: 68633.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 13.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1522 SDtfs, 3612 SDslu, 4414 SDs, 0 SdLazy, 5324 SolverSat, 340 SolverUnsat, 12 SolverUnknown, 0 SolverNotchecked, 48512.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1129 GetRequests, 770 SyntacticMatches, 52 SemanticMatches, 307 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1366 ImplicationChecksByTransitivity, 63064.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=129occurred in iteration=25, InterpolantAutomatonStates: 232, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 159.4ms AutomataMinimizationTime, 25 MinimizatonAttempts, 606 StatesRemovedByMinimization, 20 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 210.8ms SsaConstructionTime, 1440.6ms SatisfiabilityAnalysisTime, 171423.0ms InterpolantComputationTime, 486 NumberOfCodeBlocks, 486 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 922 ConstructedInterpolants, 66 QuantifiedInterpolants, 9164 SizeOfPredicates, 151 NumberOfNonLiveVariables, 2736 ConjunctsInSsa, 224 ConjunctsInUnsatCore, 50 InterpolantComputations, 50 PerfectInterpolantSequences, 4/4 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-10-13 00:58:31,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9d7ad03-47d4-438b-9eda-fff57d1747c8/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...