./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/java_BubbleSort-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/java_BubbleSort-alloca-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ba885d2ca843c278430bc3d4272c307ea7df8f1fbcd0da84e81382a8c1939a93 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:34:50,946 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:34:50,949 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:34:51,010 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:34:51,011 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:34:51,016 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:34:51,018 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:34:51,023 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:34:51,026 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:34:51,032 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:34:51,033 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:34:51,036 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:34:51,036 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:34:51,039 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:34:51,042 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:34:51,049 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:34:51,051 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:34:51,052 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:34:51,055 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:34:51,064 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:34:51,066 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:34:51,068 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:34:51,072 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:34:51,073 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:34:51,083 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:34:51,084 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:34:51,084 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:34:51,087 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:34:51,088 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:34:51,089 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:34:51,090 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:34:51,091 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:34:51,093 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:34:51,095 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:34:51,096 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:34:51,097 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:34:51,098 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:34:51,098 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:34:51,098 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:34:51,099 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:34:51,100 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:34:51,101 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-21 01:34:51,155 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:34:51,156 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:34:51,156 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:34:51,157 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:34:51,158 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:34:51,158 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:34:51,158 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:34:51,158 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:34:51,159 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:34:51,159 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 01:34:51,160 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:34:51,160 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:34:51,161 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 01:34:51,161 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 01:34:51,161 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:34:51,162 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 01:34:51,162 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 01:34:51,162 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 01:34:51,163 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-21 01:34:51,163 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-21 01:34:51,164 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:34:51,164 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 01:34:51,164 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-21 01:34:51,166 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:34:51,166 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 01:34:51,166 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:34:51,166 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-21 01:34:51,167 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-21 01:34:51,167 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-21 01:34:51,167 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:34:51,168 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-21 01:34:51,168 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 01:34:51,168 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:34:51,168 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:34:51,169 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:34:51,169 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:34:51,169 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:34:51,169 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:34:51,170 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 01:34:51,170 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 01:34:51,170 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:34:51,170 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:34:51,171 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ba885d2ca843c278430bc3d4272c307ea7df8f1fbcd0da84e81382a8c1939a93 [2021-11-21 01:34:51,479 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:34:51,504 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:34:51,507 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:34:51,508 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:34:51,509 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:34:51,511 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/array-memsafety/java_BubbleSort-alloca-1.i [2021-11-21 01:34:51,595 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/data/c8a7346ab/eb3c5e182e154700acea8f9eac45e3d9/FLAGa13d727ac [2021-11-21 01:34:52,270 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:34:52,271 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/sv-benchmarks/c/array-memsafety/java_BubbleSort-alloca-1.i [2021-11-21 01:34:52,297 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/data/c8a7346ab/eb3c5e182e154700acea8f9eac45e3d9/FLAGa13d727ac [2021-11-21 01:34:52,507 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/data/c8a7346ab/eb3c5e182e154700acea8f9eac45e3d9 [2021-11-21 01:34:52,509 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:34:52,511 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:34:52,517 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:34:52,517 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:34:52,522 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:34:52,523 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:34:52" (1/1) ... [2021-11-21 01:34:52,526 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a1c6d7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:34:52, skipping insertion in model container [2021-11-21 01:34:52,527 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:34:52" (1/1) ... [2021-11-21 01:34:52,535 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:34:52,607 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:34:52,919 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:34:52,930 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-21 01:34:52,931 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4c2df05b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:34:52, skipping insertion in model container [2021-11-21 01:34:52,931 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:34:52,932 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-21 01:34:52,934 INFO L158 Benchmark]: Toolchain (without parser) took 421.84ms. Allocated memory is still 98.6MB. Free memory was 56.8MB in the beginning and 71.5MB in the end (delta: -14.7MB). Peak memory consumption was 6.5MB. Max. memory is 16.1GB. [2021-11-21 01:34:52,935 INFO L158 Benchmark]: CDTParser took 0.34ms. Allocated memory is still 98.6MB. Free memory is still 74.0MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 01:34:52,936 INFO L158 Benchmark]: CACSL2BoogieTranslator took 414.79ms. Allocated memory is still 98.6MB. Free memory was 56.6MB in the beginning and 71.5MB in the end (delta: -14.9MB). Peak memory consumption was 6.5MB. Max. memory is 16.1GB. [2021-11-21 01:34:52,938 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34ms. Allocated memory is still 98.6MB. Free memory is still 74.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 414.79ms. Allocated memory is still 98.6MB. Free memory was 56.6MB in the beginning and 71.5MB in the end (delta: -14.9MB). Peak memory consumption was 6.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 526]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/java_BubbleSort-alloca-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ba885d2ca843c278430bc3d4272c307ea7df8f1fbcd0da84e81382a8c1939a93 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:34:55,516 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:34:55,519 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:34:55,562 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:34:55,562 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:34:55,567 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:34:55,570 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:34:55,577 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:34:55,581 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:34:55,592 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:34:55,594 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:34:55,596 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:34:55,596 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:34:55,600 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:34:55,602 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:34:55,605 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:34:55,607 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:34:55,608 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:34:55,624 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:34:55,634 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:34:55,636 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:34:55,638 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:34:55,641 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:34:55,643 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:34:55,653 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:34:55,653 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:34:55,654 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:34:55,656 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:34:55,656 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:34:55,657 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:34:55,658 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:34:55,659 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:34:55,661 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:34:55,662 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:34:55,663 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:34:55,664 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:34:55,665 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:34:55,665 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:34:55,665 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:34:55,667 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:34:55,668 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:34:55,669 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-21 01:34:55,719 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:34:55,719 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:34:55,720 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:34:55,720 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:34:55,721 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:34:55,721 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:34:55,722 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:34:55,722 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:34:55,722 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:34:55,722 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:34:55,723 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:34:55,724 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:34:55,725 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-21 01:34:55,725 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-21 01:34:55,726 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:34:55,726 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 01:34:55,726 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-21 01:34:55,726 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:34:55,727 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 01:34:55,727 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:34:55,727 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-21 01:34:55,727 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-21 01:34:55,727 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-21 01:34:55,728 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:34:55,728 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-21 01:34:55,728 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-21 01:34:55,728 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-21 01:34:55,728 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 01:34:55,729 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:34:55,729 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:34:55,729 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-21 01:34:55,730 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:34:55,730 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:34:55,730 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:34:55,731 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:34:55,731 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-21 01:34:55,731 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-21 01:34:55,731 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:34:55,732 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:34:55,732 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_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ba885d2ca843c278430bc3d4272c307ea7df8f1fbcd0da84e81382a8c1939a93 [2021-11-21 01:34:56,200 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:34:56,232 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:34:56,237 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:34:56,238 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:34:56,239 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:34:56,240 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/array-memsafety/java_BubbleSort-alloca-1.i [2021-11-21 01:34:56,329 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/data/243095a84/a1c53f8295a34692aaf211898fd28c04/FLAGc9739e3df [2021-11-21 01:34:57,085 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:34:57,086 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/sv-benchmarks/c/array-memsafety/java_BubbleSort-alloca-1.i [2021-11-21 01:34:57,114 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/data/243095a84/a1c53f8295a34692aaf211898fd28c04/FLAGc9739e3df [2021-11-21 01:34:57,319 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/data/243095a84/a1c53f8295a34692aaf211898fd28c04 [2021-11-21 01:34:57,322 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:34:57,323 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:34:57,325 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:34:57,325 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:34:57,330 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:34:57,331 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:34:57" (1/1) ... [2021-11-21 01:34:57,332 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c6561e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:34:57, skipping insertion in model container [2021-11-21 01:34:57,332 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:34:57" (1/1) ... [2021-11-21 01:34:57,341 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:34:57,399 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:34:57,722 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:34:57,741 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-21 01:34:57,755 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:34:57,818 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:34:57,827 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:34:57,865 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:34:57,900 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:34:57,901 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:34:57 WrapperNode [2021-11-21 01:34:57,901 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:34:57,902 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:34:57,902 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:34:57,903 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:34:57,911 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:34:57" (1/1) ... [2021-11-21 01:34:57,931 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:34:57" (1/1) ... [2021-11-21 01:34:57,955 INFO L137 Inliner]: procedures = 117, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 63 [2021-11-21 01:34:57,959 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:34:57,961 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:34:57,962 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:34:57,962 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:34:57,971 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:34:57" (1/1) ... [2021-11-21 01:34:57,971 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:34:57" (1/1) ... [2021-11-21 01:34:57,979 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:34:57" (1/1) ... [2021-11-21 01:34:57,980 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:34:57" (1/1) ... [2021-11-21 01:34:57,989 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:34:57" (1/1) ... [2021-11-21 01:34:57,999 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:34:57" (1/1) ... [2021-11-21 01:34:58,006 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:34:57" (1/1) ... [2021-11-21 01:34:58,010 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:34:58,016 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:34:58,016 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:34:58,016 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:34:58,017 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:34:57" (1/1) ... [2021-11-21 01:34:58,028 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:34:58,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:34:58,056 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:34:58,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:34:58,103 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-21 01:34:58,104 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 01:34:58,106 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 01:34:58,106 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-21 01:34:58,107 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:34:58,107 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:34:58,281 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:34:58,284 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:34:58,779 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:34:58,786 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:34:58,786 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-21 01:34:58,788 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:34:58 BoogieIcfgContainer [2021-11-21 01:34:58,788 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:34:58,790 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:34:58,790 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:34:58,793 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:34:58,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:34:57" (1/3) ... [2021-11-21 01:34:58,795 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@157fbbb0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:34:58, skipping insertion in model container [2021-11-21 01:34:58,795 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:34:57" (2/3) ... [2021-11-21 01:34:58,796 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@157fbbb0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:34:58, skipping insertion in model container [2021-11-21 01:34:58,796 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:34:58" (3/3) ... [2021-11-21 01:34:58,797 INFO L111 eAbstractionObserver]: Analyzing ICFG java_BubbleSort-alloca-1.i [2021-11-21 01:34:58,804 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:34:58,804 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2021-11-21 01:34:58,858 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:34:58,866 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-21 01:34:58,866 INFO L340 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2021-11-21 01:34:58,885 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 25 states have (on average 1.92) internal successors, (48), 40 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:34:58,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-21 01:34:58,892 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:34:58,893 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-21 01:34:58,893 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-21 01:34:58,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:34:58,904 INFO L85 PathProgramCache]: Analyzing trace with hash 889508873, now seen corresponding path program 1 times [2021-11-21 01:34:58,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:34:58,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1986920062] [2021-11-21 01:34:58,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:34:58,918 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:34:58,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:34:58,923 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:34:58,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-21 01:34:59,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:34:59,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 01:34:59,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:34:59,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 01:34:59,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:34:59,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:34:59,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:34:59,150 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:34:59,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1986920062] [2021-11-21 01:34:59,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1986920062] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:34:59,152 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:34:59,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-21 01:34:59,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368336454] [2021-11-21 01:34:59,155 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:34:59,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:34:59,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:34:59,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:34:59,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:34:59,195 INFO L87 Difference]: Start difference. First operand has 41 states, 25 states have (on average 1.92) internal successors, (48), 40 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:34:59,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:34:59,329 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2021-11-21 01:34:59,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:34:59,332 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-21 01:34:59,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:34:59,342 INFO L225 Difference]: With dead ends: 40 [2021-11-21 01:34:59,342 INFO L226 Difference]: Without dead ends: 38 [2021-11-21 01:34:59,344 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:34:59,348 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 34 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:34:59,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 31 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:34:59,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-21 01:34:59,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-11-21 01:34:59,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 24 states have (on average 1.75) internal successors, (42), 37 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:34:59,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2021-11-21 01:34:59,415 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 6 [2021-11-21 01:34:59,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:34:59,416 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2021-11-21 01:34:59,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:34:59,417 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2021-11-21 01:34:59,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-21 01:34:59,418 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:34:59,418 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-21 01:34:59,435 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-21 01:34:59,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:34:59,632 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-21 01:34:59,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:34:59,633 INFO L85 PathProgramCache]: Analyzing trace with hash 889508874, now seen corresponding path program 1 times [2021-11-21 01:34:59,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:34:59,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1963878693] [2021-11-21 01:34:59,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:34:59,635 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:34:59,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:34:59,636 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:34:59,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-21 01:34:59,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:34:59,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-21 01:34:59,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:34:59,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 01:34:59,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:34:59,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:35:00,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:35:00,057 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:35:00,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1963878693] [2021-11-21 01:35:00,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1963878693] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:35:00,058 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:35:00,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-21 01:35:00,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352521572] [2021-11-21 01:35:00,059 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:35:00,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:35:00,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:35:00,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:35:00,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:35:00,062 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:35:01,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:35:01,087 INFO L93 Difference]: Finished difference Result 108 states and 118 transitions. [2021-11-21 01:35:01,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 01:35:01,089 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-21 01:35:01,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:35:01,091 INFO L225 Difference]: With dead ends: 108 [2021-11-21 01:35:01,091 INFO L226 Difference]: Without dead ends: 108 [2021-11-21 01:35:01,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-11-21 01:35:01,094 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 149 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-21 01:35:01,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 117 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-21 01:35:01,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-11-21 01:35:01,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 42. [2021-11-21 01:35:01,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 28 states have (on average 1.6785714285714286) internal successors, (47), 41 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:35:01,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2021-11-21 01:35:01,105 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 6 [2021-11-21 01:35:01,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:35:01,106 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2021-11-21 01:35:01,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:35:01,107 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2021-11-21 01:35:01,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-21 01:35:01,107 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:35:01,108 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:35:01,120 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-21 01:35:01,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:35:01,322 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-21 01:35:01,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:35:01,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1184052082, now seen corresponding path program 1 times [2021-11-21 01:35:01,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:35:01,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [279710312] [2021-11-21 01:35:01,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:35:01,325 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:35:01,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:35:01,326 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:35:01,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-21 01:35:01,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:35:01,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 01:35:01,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:35:01,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:35:01,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:35:01,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:35:01,506 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:35:01,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [279710312] [2021-11-21 01:35:01,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [279710312] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:35:01,507 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:35:01,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-21 01:35:01,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048532858] [2021-11-21 01:35:01,508 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:35:01,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:35:01,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:35:01,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:35:01,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:35:01,510 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:35:01,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:35:01,594 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2021-11-21 01:35:01,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:35:01,599 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-21 01:35:01,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:35:01,600 INFO L225 Difference]: With dead ends: 44 [2021-11-21 01:35:01,600 INFO L226 Difference]: Without dead ends: 44 [2021-11-21 01:35:01,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:35:01,602 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 83 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:35:01,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 68 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:35:01,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-11-21 01:35:01,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2021-11-21 01:35:01,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 39 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:35:01,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2021-11-21 01:35:01,616 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 9 [2021-11-21 01:35:01,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:35:01,617 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2021-11-21 01:35:01,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:35:01,617 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2021-11-21 01:35:01,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-21 01:35:01,621 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:35:01,622 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:35:01,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-21 01:35:01,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:35:01,823 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-21 01:35:01,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:35:01,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1091210163, now seen corresponding path program 1 times [2021-11-21 01:35:01,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:35:01,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [496390672] [2021-11-21 01:35:01,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:35:01,824 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:35:01,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:35:01,825 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:35:01,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-21 01:35:01,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:35:01,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 01:35:01,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:35:02,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:35:02,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:35:02,108 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:35:02,109 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:35:02,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [496390672] [2021-11-21 01:35:02,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [496390672] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:35:02,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [26017712] [2021-11-21 01:35:02,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:35:02,114 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:35:02,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:35:02,125 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:35:02,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2021-11-21 01:35:02,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:35:02,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 01:35:02,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:35:02,277 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:35:02,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:35:02,318 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:35:02,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [26017712] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:35:02,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582674395] [2021-11-21 01:35:02,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:35:02,319 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:35:02,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:35:02,324 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:35:02,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-21 01:35:02,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:35:02,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 01:35:02,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:35:02,452 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:35:02,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:35:02,500 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:35:02,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582674395] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:35:02,500 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:35:02,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2021-11-21 01:35:02,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439680531] [2021-11-21 01:35:02,501 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:35:02,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 01:35:02,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:35:02,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 01:35:02,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:35:02,507 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:35:02,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:35:02,598 INFO L93 Difference]: Finished difference Result 75 states and 81 transitions. [2021-11-21 01:35:02,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:35:02,599 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-21 01:35:02,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:35:02,602 INFO L225 Difference]: With dead ends: 75 [2021-11-21 01:35:02,605 INFO L226 Difference]: Without dead ends: 75 [2021-11-21 01:35:02,605 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:35:02,607 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 131 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:35:02,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 170 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:35:02,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-11-21 01:35:02,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 46. [2021-11-21 01:35:02,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 32 states have (on average 1.5625) internal successors, (50), 45 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:35:02,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2021-11-21 01:35:02,627 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 10 [2021-11-21 01:35:02,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:35:02,627 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2021-11-21 01:35:02,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:35:02,628 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2021-11-21 01:35:02,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-21 01:35:02,628 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:35:02,629 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:35:02,670 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-21 01:35:02,851 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-11-21 01:35:03,045 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2021-11-21 01:35:03,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt [2021-11-21 01:35:03,244 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-21 01:35:03,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:35:03,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1900556789, now seen corresponding path program 1 times [2021-11-21 01:35:03,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:35:03,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [93484417] [2021-11-21 01:35:03,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:35:03,245 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:35:03,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:35:03,253 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:35:03,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-21 01:35:03,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:35:03,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-21 01:35:03,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:35:03,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-21 01:35:03,615 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:35:03,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:35:04,360 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:35:04,360 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:35:04,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [93484417] [2021-11-21 01:35:04,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [93484417] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:35:04,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [955176879] [2021-11-21 01:35:04,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:35:04,362 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:35:04,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:35:04,367 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:35:04,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-21 01:35:04,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:35:04,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-21 01:35:04,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:35:04,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-21 01:35:04,742 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:35:04,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:35:05,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:35:05,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [955176879] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:35:05,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553704504] [2021-11-21 01:35:05,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:35:05,078 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:35:05,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:35:05,079 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:35:05,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-21 01:35:05,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:35:05,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-21 01:35:05,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:35:05,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-21 01:35:05,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:35:05,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:35:05,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:35:05,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553704504] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:35:05,599 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:35:05,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 12 [2021-11-21 01:35:05,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118981491] [2021-11-21 01:35:05,599 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:35:05,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-21 01:35:05,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:35:05,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-21 01:35:05,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-11-21 01:35:05,601 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:35:06,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:35:06,568 INFO L93 Difference]: Finished difference Result 83 states and 91 transitions. [2021-11-21 01:35:06,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-21 01:35:06,570 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-21 01:35:06,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:35:06,571 INFO L225 Difference]: With dead ends: 83 [2021-11-21 01:35:06,571 INFO L226 Difference]: Without dead ends: 83 [2021-11-21 01:35:06,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-11-21 01:35:06,572 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 112 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-21 01:35:06,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 190 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 161 Invalid, 0 Unknown, 25 Unchecked, 0.9s Time] [2021-11-21 01:35:06,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-11-21 01:35:06,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 54. [2021-11-21 01:35:06,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 40 states have (on average 1.5) internal successors, (60), 53 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:35:06,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2021-11-21 01:35:06,579 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 10 [2021-11-21 01:35:06,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:35:06,579 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2021-11-21 01:35:06,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:35:06,580 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2021-11-21 01:35:06,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-21 01:35:06,580 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:35:06,581 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:35:06,598 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-21 01:35:06,822 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-11-21 01:35:07,000 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-11-21 01:35:07,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt [2021-11-21 01:35:07,207 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-21 01:35:07,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:35:07,207 INFO L85 PathProgramCache]: Analyzing trace with hash 363893197, now seen corresponding path program 1 times [2021-11-21 01:35:07,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:35:07,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1165311961] [2021-11-21 01:35:07,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:35:07,208 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:35:07,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:35:07,209 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:35:07,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-21 01:35:07,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:35:07,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 01:35:07,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:35:07,405 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:35:07,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:35:11,542 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:35:11,542 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:35:11,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1165311961] [2021-11-21 01:35:11,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1165311961] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:35:11,543 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:35:11,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-21 01:35:11,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581935717] [2021-11-21 01:35:11,544 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:35:11,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 01:35:11,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:35:11,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 01:35:11,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=25, Unknown=2, NotChecked=0, Total=42 [2021-11-21 01:35:11,545 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:35:11,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:35:11,674 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2021-11-21 01:35:11,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:35:11,674 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-21 01:35:11,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:35:11,677 INFO L225 Difference]: With dead ends: 53 [2021-11-21 01:35:11,677 INFO L226 Difference]: Without dead ends: 51 [2021-11-21 01:35:11,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=15, Invalid=25, Unknown=2, NotChecked=0, Total=42 [2021-11-21 01:35:11,678 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 57 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:35:11,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 74 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 17 Unchecked, 0.1s Time] [2021-11-21 01:35:11,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-21 01:35:11,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-11-21 01:35:11,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 38 states have (on average 1.5) internal successors, (57), 50 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:35:11,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2021-11-21 01:35:11,686 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 13 [2021-11-21 01:35:11,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:35:11,686 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2021-11-21 01:35:11,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:35:11,687 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2021-11-21 01:35:11,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-21 01:35:11,688 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:35:11,688 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:35:11,722 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-21 01:35:11,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:35:11,915 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-21 01:35:11,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:35:11,916 INFO L85 PathProgramCache]: Analyzing trace with hash 363893999, now seen corresponding path program 1 times [2021-11-21 01:35:11,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:35:11,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1863887202] [2021-11-21 01:35:11,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:35:11,917 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:35:11,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:35:11,918 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:35:11,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-21 01:35:11,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:35:11,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 01:35:11,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:35:12,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:35:12,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:35:12,100 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:35:12,100 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:35:12,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1863887202] [2021-11-21 01:35:12,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1863887202] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:35:12,100 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:35:12,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-21 01:35:12,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904184413] [2021-11-21 01:35:12,101 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:35:12,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:35:12,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:35:12,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:35:12,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:35:12,102 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:35:12,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:35:12,169 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2021-11-21 01:35:12,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:35:12,176 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-21 01:35:12,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:35:12,177 INFO L225 Difference]: With dead ends: 53 [2021-11-21 01:35:12,177 INFO L226 Difference]: Without dead ends: 45 [2021-11-21 01:35:12,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:35:12,178 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 2 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:35:12,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 129 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:35:12,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-21 01:35:12,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-11-21 01:35:12,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 32 states have (on average 1.5625) internal successors, (50), 44 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:35:12,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2021-11-21 01:35:12,191 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 13 [2021-11-21 01:35:12,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:35:12,191 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2021-11-21 01:35:12,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:35:12,192 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2021-11-21 01:35:12,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-21 01:35:12,193 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:35:12,193 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:35:12,211 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-21 01:35:12,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:35:12,406 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-21 01:35:12,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:35:12,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1064958577, now seen corresponding path program 1 times [2021-11-21 01:35:12,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:35:12,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1988432297] [2021-11-21 01:35:12,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:35:12,407 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:35:12,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:35:12,408 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:35:12,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-21 01:35:12,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:35:12,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 01:35:12,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:35:12,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 01:35:12,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:35:12,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:35:12,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:35:12,617 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:35:12,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1988432297] [2021-11-21 01:35:12,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1988432297] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:35:12,617 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:35:12,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-21 01:35:12,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145721861] [2021-11-21 01:35:12,618 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:35:12,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:35:12,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:35:12,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:35:12,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:35:12,620 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:35:12,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:35:12,821 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2021-11-21 01:35:12,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:35:12,822 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-21 01:35:12,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:35:12,823 INFO L225 Difference]: With dead ends: 39 [2021-11-21 01:35:12,823 INFO L226 Difference]: Without dead ends: 39 [2021-11-21 01:35:12,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:35:12,824 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 42 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:35:12,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 23 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:35:12,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-11-21 01:35:12,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-11-21 01:35:12,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 32 states have (on average 1.375) internal successors, (44), 38 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:35:12,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2021-11-21 01:35:12,835 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 13 [2021-11-21 01:35:12,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:35:12,835 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2021-11-21 01:35:12,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:35:12,837 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2021-11-21 01:35:12,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-21 01:35:12,838 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:35:12,839 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:35:12,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-21 01:35:13,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:35:13,050 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-21 01:35:13,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:35:13,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1064958578, now seen corresponding path program 1 times [2021-11-21 01:35:13,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:35:13,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [837827171] [2021-11-21 01:35:13,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:35:13,051 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:35:13,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:35:13,052 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:35:13,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-21 01:35:13,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:35:13,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-21 01:35:13,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:35:13,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 12 [2021-11-21 01:35:13,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:35:13,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:35:14,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:35:14,113 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:35:14,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [837827171] [2021-11-21 01:35:14,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [837827171] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-21 01:35:14,114 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:35:14,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2021-11-21 01:35:14,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286751489] [2021-11-21 01:35:14,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:35:14,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:35:14,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:35:14,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:35:14,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-21 01:35:14,116 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:35:14,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:35:14,869 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2021-11-21 01:35:14,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:35:14,870 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-21 01:35:14,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:35:14,871 INFO L225 Difference]: With dead ends: 41 [2021-11-21 01:35:14,871 INFO L226 Difference]: Without dead ends: 41 [2021-11-21 01:35:14,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-11-21 01:35:14,873 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 90 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:35:14,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 32 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 01:35:14,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-11-21 01:35:14,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2021-11-21 01:35:14,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.3235294117647058) internal successors, (45), 38 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:35:14,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2021-11-21 01:35:14,878 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 13 [2021-11-21 01:35:14,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:35:14,879 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2021-11-21 01:35:14,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:35:14,879 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2021-11-21 01:35:14,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-21 01:35:14,880 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:35:14,880 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:35:14,892 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-21 01:35:15,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:35:15,091 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-21 01:35:15,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:35:15,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1346022463, now seen corresponding path program 1 times [2021-11-21 01:35:15,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:35:15,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [188586547] [2021-11-21 01:35:15,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:35:15,093 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:35:15,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:35:15,094 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:35:15,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-21 01:35:15,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:35:15,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-21 01:35:15,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:35:15,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-21 01:35:15,524 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:35:15,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:35:16,228 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:35:16,228 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:35:16,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [188586547] [2021-11-21 01:35:16,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [188586547] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:35:16,229 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:35:16,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-21 01:35:16,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383554043] [2021-11-21 01:35:16,229 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:35:16,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-21 01:35:16,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:35:16,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-21 01:35:16,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-21 01:35:16,230 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:35:16,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:35:16,780 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2021-11-21 01:35:16,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 01:35:16,782 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-21 01:35:16,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:35:16,783 INFO L225 Difference]: With dead ends: 43 [2021-11-21 01:35:16,783 INFO L226 Difference]: Without dead ends: 43 [2021-11-21 01:35:16,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-11-21 01:35:16,795 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 19 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:35:16,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 79 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 71 Invalid, 0 Unknown, 5 Unchecked, 0.4s Time] [2021-11-21 01:35:16,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-11-21 01:35:16,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2021-11-21 01:35:16,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 38 states have (on average 1.2894736842105263) internal successors, (49), 41 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:35:16,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2021-11-21 01:35:16,803 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 14 [2021-11-21 01:35:16,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:35:16,803 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2021-11-21 01:35:16,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:35:16,804 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2021-11-21 01:35:16,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-21 01:35:16,805 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:35:16,805 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:35:16,828 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-21 01:35:17,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:35:17,019 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-21 01:35:17,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:35:17,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1570446787, now seen corresponding path program 1 times [2021-11-21 01:35:17,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:35:17,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1490715079] [2021-11-21 01:35:17,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:35:17,021 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:35:17,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:35:17,023 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:35:17,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-21 01:35:17,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:35:17,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-21 01:35:17,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:35:17,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-21 01:35:17,562 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:35:17,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:35:18,734 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:35:18,734 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:35:18,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1490715079] [2021-11-21 01:35:18,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1490715079] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:35:18,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1922874798] [2021-11-21 01:35:18,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:35:18,735 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:35:18,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:35:18,736 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:35:18,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-21 01:35:18,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:35:18,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 01:35:18,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:35:19,141 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:35:19,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:35:19,500 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:35:19,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1922874798] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:35:19,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671803598] [2021-11-21 01:35:19,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:35:19,501 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:35:19,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:35:19,502 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:35:19,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-21 01:35:19,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:35:19,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-21 01:35:19,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:35:19,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-21 01:35:20,109 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:35:20,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:35:21,458 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:35:21,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671803598] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:35:21,459 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:35:21,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 6, 6, 7] total 29 [2021-11-21 01:35:21,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516597951] [2021-11-21 01:35:21,459 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:35:21,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-21 01:35:21,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:35:21,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-21 01:35:21,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=688, Unknown=0, NotChecked=0, Total=812 [2021-11-21 01:35:21,462 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand has 29 states, 29 states have (on average 2.6206896551724137) internal successors, (76), 29 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:35:23,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:35:23,574 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2021-11-21 01:35:23,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-21 01:35:23,576 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.6206896551724137) internal successors, (76), 29 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-21 01:35:23,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:35:23,576 INFO L225 Difference]: With dead ends: 53 [2021-11-21 01:35:23,576 INFO L226 Difference]: Without dead ends: 51 [2021-11-21 01:35:23,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=269, Invalid=1291, Unknown=0, NotChecked=0, Total=1560 [2021-11-21 01:35:23,579 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 63 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:35:23,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 139 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 283 Invalid, 0 Unknown, 10 Unchecked, 1.2s Time] [2021-11-21 01:35:23,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-21 01:35:23,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 42. [2021-11-21 01:35:23,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 39 states have (on average 1.2307692307692308) internal successors, (48), 41 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:35:23,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2021-11-21 01:35:23,588 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 17 [2021-11-21 01:35:23,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:35:23,589 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2021-11-21 01:35:23,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.6206896551724137) internal successors, (76), 29 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:35:23,589 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2021-11-21 01:35:23,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-21 01:35:23,590 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:35:23,590 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1] [2021-11-21 01:35:23,615 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-21 01:35:23,797 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-21 01:35:24,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-21 01:35:24,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:35:24,196 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-21 01:35:24,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:35:24,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1817992175, now seen corresponding path program 2 times [2021-11-21 01:35:24,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:35:24,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [925953554] [2021-11-21 01:35:24,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 01:35:24,197 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:35:24,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:35:24,198 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:35:24,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-21 01:35:24,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 01:35:24,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:35:24,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-21 01:35:24,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:35:24,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-21 01:35:24,775 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:35:24,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:35:26,033 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:35:26,033 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:35:26,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [925953554] [2021-11-21 01:35:26,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [925953554] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:35:26,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [546594212] [2021-11-21 01:35:26,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 01:35:26,034 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:35:26,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:35:26,035 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:35:26,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-21 01:35:26,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 01:35:26,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:35:26,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-21 01:35:26,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:35:26,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-21 01:35:26,584 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:35:26,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:35:27,134 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:35:27,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [546594212] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:35:27,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975785970] [2021-11-21 01:35:27,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 01:35:27,135 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:35:27,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:35:27,141 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:35:27,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-21 01:35:27,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 01:35:27,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:35:27,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-21 01:35:27,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:35:27,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-21 01:35:27,529 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:35:27,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:35:28,764 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:35:28,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975785970] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:35:28,765 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:35:28,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 8, 8] total 24 [2021-11-21 01:35:28,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319335806] [2021-11-21 01:35:28,765 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:35:28,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-21 01:35:28,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:35:28,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-21 01:35:28,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=425, Unknown=0, NotChecked=0, Total=600 [2021-11-21 01:35:28,768 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 25 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:35:31,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:35:31,974 INFO L93 Difference]: Finished difference Result 150 states and 176 transitions. [2021-11-21 01:35:31,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-21 01:35:31,976 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-21 01:35:31,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:35:31,977 INFO L225 Difference]: With dead ends: 150 [2021-11-21 01:35:31,977 INFO L226 Difference]: Without dead ends: 150 [2021-11-21 01:35:31,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=292, Invalid=700, Unknown=0, NotChecked=0, Total=992 [2021-11-21 01:35:31,979 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 528 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 528 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:35:31,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [528 Valid, 175 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 239 Invalid, 0 Unknown, 15 Unchecked, 1.4s Time] [2021-11-21 01:35:31,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-11-21 01:35:31,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 58. [2021-11-21 01:35:31,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 55 states have (on average 1.2363636363636363) internal successors, (68), 57 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:35:31,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 68 transitions. [2021-11-21 01:35:31,986 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 68 transitions. Word has length 18 [2021-11-21 01:35:31,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:35:31,987 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 68 transitions. [2021-11-21 01:35:31,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:35:31,987 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 68 transitions. [2021-11-21 01:35:31,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-21 01:35:31,988 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:35:31,988 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:35:32,014 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-21 01:35:32,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-21 01:35:32,419 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (20)] Ended with exit code 0 [2021-11-21 01:35:32,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt [2021-11-21 01:35:32,615 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-21 01:35:32,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:35:32,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1609733735, now seen corresponding path program 1 times [2021-11-21 01:35:32,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:35:32,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [254216270] [2021-11-21 01:35:32,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:35:32,616 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:35:32,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:35:32,617 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:35:32,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-21 01:35:32,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:35:32,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-21 01:35:32,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:35:32,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 12 [2021-11-21 01:35:33,938 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 01:35:33,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:35:35,046 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 01:35:35,046 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:35:35,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [254216270] [2021-11-21 01:35:35,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [254216270] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:35:35,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1651636369] [2021-11-21 01:35:35,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:35:35,047 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:35:35,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:35:35,054 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:35:35,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-21 01:35:35,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:35:35,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-21 01:35:35,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:35:35,840 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:35:35,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:35:36,967 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:35:36,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1651636369] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:35:36,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806387460] [2021-11-21 01:35:36,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:35:36,968 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:35:36,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:35:36,969 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:35:36,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-21 01:35:37,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:35:37,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-21 01:35:37,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:35:37,064 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 13 treesize of output 12 [2021-11-21 01:35:37,456 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 01:35:37,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:35:37,936 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 01:35:37,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806387460] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:35:37,937 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:35:37,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 11, 10, 7, 6] total 29 [2021-11-21 01:35:37,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605351561] [2021-11-21 01:35:37,937 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:35:37,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-21 01:35:37,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:35:37,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-21 01:35:37,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2021-11-21 01:35:37,940 INFO L87 Difference]: Start difference. First operand 58 states and 68 transitions. Second operand has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 29 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:35:38,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:35:38,935 INFO L93 Difference]: Finished difference Result 82 states and 100 transitions. [2021-11-21 01:35:38,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-21 01:35:38,937 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 29 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-21 01:35:38,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:35:38,938 INFO L225 Difference]: With dead ends: 82 [2021-11-21 01:35:38,939 INFO L226 Difference]: Without dead ends: 82 [2021-11-21 01:35:38,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=199, Invalid=1207, Unknown=0, NotChecked=0, Total=1406 [2021-11-21 01:35:38,940 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 23 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:35:38,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 211 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 30 Unchecked, 0.3s Time] [2021-11-21 01:35:38,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-11-21 01:35:38,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 77. [2021-11-21 01:35:38,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 74 states have (on average 1.2702702702702702) internal successors, (94), 76 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:35:38,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 94 transitions. [2021-11-21 01:35:38,947 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 94 transitions. Word has length 22 [2021-11-21 01:35:38,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:35:38,948 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 94 transitions. [2021-11-21 01:35:38,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 29 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:35:38,948 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 94 transitions. [2021-11-21 01:35:38,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-21 01:35:38,950 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:35:38,950 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:35:38,969 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-21 01:35:39,192 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-21 01:35:39,367 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-11-21 01:35:39,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt [2021-11-21 01:35:39,565 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-21 01:35:39,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:35:39,566 INFO L85 PathProgramCache]: Analyzing trace with hash -914742659, now seen corresponding path program 1 times [2021-11-21 01:35:39,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:35:39,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1754830959] [2021-11-21 01:35:39,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:35:39,567 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:35:39,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:35:39,568 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:35:39,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-21 01:35:39,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:35:39,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-21 01:35:39,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:35:39,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 12 [2021-11-21 01:35:40,429 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-21 01:35:40,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:35:41,490 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-21 01:35:41,491 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:35:41,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1754830959] [2021-11-21 01:35:41,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1754830959] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:35:41,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [609873251] [2021-11-21 01:35:41,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:35:41,492 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:35:41,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:35:41,493 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:35:41,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-21 01:35:41,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:35:41,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-21 01:35:41,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:35:42,155 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:35:42,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:35:43,116 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:35:43,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [609873251] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:35:43,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439467665] [2021-11-21 01:35:43,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:35:43,117 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:35:43,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:35:43,118 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:35:43,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-21 01:35:43,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:35:43,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-21 01:35:43,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:35:43,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 12 [2021-11-21 01:35:43,563 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-21 01:35:43,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:35:44,125 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-21 01:35:44,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439467665] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:35:44,126 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:35:44,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 10, 9, 7, 6] total 27 [2021-11-21 01:35:44,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474547145] [2021-11-21 01:35:44,126 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:35:44,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-21 01:35:44,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:35:44,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-21 01:35:44,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2021-11-21 01:35:44,128 INFO L87 Difference]: Start difference. First operand 77 states and 94 transitions. Second operand has 27 states, 27 states have (on average 2.740740740740741) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:35:47,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:35:47,399 INFO L93 Difference]: Finished difference Result 99 states and 123 transitions. [2021-11-21 01:35:47,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-21 01:35:47,400 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.740740740740741) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-21 01:35:47,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:35:47,401 INFO L225 Difference]: With dead ends: 99 [2021-11-21 01:35:47,401 INFO L226 Difference]: Without dead ends: 99 [2021-11-21 01:35:47,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=246, Invalid=1476, Unknown=0, NotChecked=0, Total=1722 [2021-11-21 01:35:47,403 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 24 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:35:47,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 173 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 55 Invalid, 0 Unknown, 37 Unchecked, 0.3s Time] [2021-11-21 01:35:47,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-11-21 01:35:47,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 81. [2021-11-21 01:35:47,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 78 states have (on average 1.2564102564102564) internal successors, (98), 80 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:35:47,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 98 transitions. [2021-11-21 01:35:47,410 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 98 transitions. Word has length 25 [2021-11-21 01:35:47,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:35:47,411 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 98 transitions. [2021-11-21 01:35:47,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.740740740740741) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:35:47,411 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 98 transitions. [2021-11-21 01:35:47,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-21 01:35:47,412 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:35:47,413 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:35:47,434 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2021-11-21 01:35:47,639 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (26)] Ended with exit code 0 [2021-11-21 01:35:47,860 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-11-21 01:35:48,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:35:48,035 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-21 01:35:48,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:35:48,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1553234866, now seen corresponding path program 1 times [2021-11-21 01:35:48,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:35:48,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [12582402] [2021-11-21 01:35:48,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:35:48,036 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:35:48,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:35:48,037 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:35:48,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-21 01:35:48,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:35:48,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-21 01:35:48,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:35:48,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 12 [2021-11-21 01:35:48,869 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 01:35:48,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:35:49,666 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 01:35:49,666 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:35:49,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [12582402] [2021-11-21 01:35:49,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [12582402] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:35:49,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [382543399] [2021-11-21 01:35:49,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:35:49,667 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:35:49,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:35:49,669 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:35:49,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-11-21 01:35:49,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:35:49,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-21 01:35:49,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:35:50,259 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:35:50,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:35:50,969 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:35:50,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [382543399] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:35:50,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685862216] [2021-11-21 01:35:50,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:35:50,969 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:35:50,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:35:50,970 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:35:50,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-21 01:35:51,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:35:51,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-21 01:35:51,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:35:51,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 12 [2021-11-21 01:35:51,496 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 01:35:51,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:35:53,257 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 01:35:53,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685862216] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:35:53,257 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:35:53,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 10, 9, 7, 7] total 32 [2021-11-21 01:35:53,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255316528] [2021-11-21 01:35:53,258 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:35:53,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-21 01:35:53,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:35:53,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-21 01:35:53,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=861, Unknown=0, NotChecked=0, Total=992 [2021-11-21 01:35:53,260 INFO L87 Difference]: Start difference. First operand 81 states and 98 transitions. Second operand has 32 states, 32 states have (on average 3.21875) internal successors, (103), 32 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:35:57,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:35:57,120 INFO L93 Difference]: Finished difference Result 114 states and 142 transitions. [2021-11-21 01:35:57,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-21 01:35:57,122 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.21875) internal successors, (103), 32 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-21 01:35:57,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:35:57,123 INFO L225 Difference]: With dead ends: 114 [2021-11-21 01:35:57,123 INFO L226 Difference]: Without dead ends: 110 [2021-11-21 01:35:57,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=239, Invalid=1483, Unknown=0, NotChecked=0, Total=1722 [2021-11-21 01:35:57,125 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 26 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:35:57,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 195 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 52 Invalid, 0 Unknown, 38 Unchecked, 0.2s Time] [2021-11-21 01:35:57,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-11-21 01:35:57,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 105. [2021-11-21 01:35:57,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 102 states have (on average 1.303921568627451) internal successors, (133), 104 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:35:57,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 133 transitions. [2021-11-21 01:35:57,133 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 133 transitions. Word has length 26 [2021-11-21 01:35:57,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:35:57,134 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 133 transitions. [2021-11-21 01:35:57,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.21875) internal successors, (103), 32 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:35:57,134 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 133 transitions. [2021-11-21 01:35:57,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-21 01:35:57,136 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:35:57,136 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:35:57,154 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-21 01:35:57,377 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-11-21 01:35:57,553 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (29)] Ended with exit code 0 [2021-11-21 01:35:57,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt [2021-11-21 01:35:57,751 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-21 01:35:57,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:35:57,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1054837879, now seen corresponding path program 1 times [2021-11-21 01:35:57,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:35:57,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1102745179] [2021-11-21 01:35:57,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:35:57,752 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:35:57,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:35:57,753 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:35:57,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-21 01:35:57,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:35:57,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-21 01:35:57,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:35:57,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 12 [2021-11-21 01:35:59,146 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:35:59,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:36:01,329 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:36:01,329 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:36:01,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1102745179] [2021-11-21 01:36:01,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1102745179] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:36:01,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1966848676] [2021-11-21 01:36:01,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:36:01,330 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:36:01,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:36:01,331 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:36:01,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2021-11-21 01:36:01,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:36:01,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-21 01:36:01,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:36:01,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-21 01:36:02,718 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:36:02,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:36:05,439 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:36:05,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1966848676] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:36:05,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82285162] [2021-11-21 01:36:05,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:36:05,439 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:36:05,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:36:05,440 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:36:05,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-21 01:36:05,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:36:05,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-21 01:36:05,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:36:05,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-21 01:36:07,013 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 01:36:07,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:36:11,524 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 01:36:11,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82285162] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:36:11,524 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:36:11,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 12, 11, 8, 9] total 47 [2021-11-21 01:36:11,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674854936] [2021-11-21 01:36:11,525 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:36:11,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-21 01:36:11,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:36:11,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-21 01:36:11,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=1958, Unknown=0, NotChecked=0, Total=2256 [2021-11-21 01:36:11,528 INFO L87 Difference]: Start difference. First operand 105 states and 133 transitions. Second operand has 48 states, 47 states have (on average 2.6595744680851063) internal successors, (125), 48 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:36:32,628 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:36:34,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:36:34,927 INFO L93 Difference]: Finished difference Result 213 states and 254 transitions. [2021-11-21 01:36:34,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-21 01:36:34,929 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 2.6595744680851063) internal successors, (125), 48 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-21 01:36:34,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:36:34,931 INFO L225 Difference]: With dead ends: 213 [2021-11-21 01:36:34,931 INFO L226 Difference]: Without dead ends: 213 [2021-11-21 01:36:34,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 115 SyntacticMatches, 11 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2217 ImplicationChecksByTransitivity, 23.5s TimeCoverageRelationStatistics Valid=1166, Invalid=5974, Unknown=0, NotChecked=0, Total=7140 [2021-11-21 01:36:34,934 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 641 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 862 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 641 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 1409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 430 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2021-11-21 01:36:34,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [641 Valid, 411 Invalid, 1409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 862 Invalid, 0 Unknown, 430 Unchecked, 8.9s Time] [2021-11-21 01:36:34,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-11-21 01:36:34,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 145. [2021-11-21 01:36:34,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 142 states have (on average 1.2746478873239437) internal successors, (181), 144 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:36:34,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 181 transitions. [2021-11-21 01:36:34,942 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 181 transitions. Word has length 27 [2021-11-21 01:36:34,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:36:34,943 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 181 transitions. [2021-11-21 01:36:34,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 2.6595744680851063) internal successors, (125), 48 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:36:34,943 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 181 transitions. [2021-11-21 01:36:34,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-21 01:36:34,945 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:36:34,946 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:36:34,954 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (32)] Ended with exit code 0 [2021-11-21 01:36:35,175 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-21 01:36:35,357 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-21 01:36:35,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:36:35,549 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-21 01:36:35,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:36:35,549 INFO L85 PathProgramCache]: Analyzing trace with hash 156266035, now seen corresponding path program 1 times [2021-11-21 01:36:35,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:36:35,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [5495873] [2021-11-21 01:36:35,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:36:35,550 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:36:35,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:36:35,551 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:36:35,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-21 01:36:35,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:36:35,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-21 01:36:35,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:36:35,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 12 [2021-11-21 01:36:37,000 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 01:36:37,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:36:38,255 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 01:36:38,255 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:36:38,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [5495873] [2021-11-21 01:36:38,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [5495873] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:36:38,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1614136353] [2021-11-21 01:36:38,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:36:38,256 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:36:38,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:36:38,257 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:36:38,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2021-11-21 01:36:38,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:36:38,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-21 01:36:38,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:36:38,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-21 01:36:39,639 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:36:39,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:36:41,555 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:36:41,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1614136353] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:36:41,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165273805] [2021-11-21 01:36:41,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:36:41,556 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:36:41,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:36:41,558 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:36:41,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-21 01:36:41,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:36:41,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-21 01:36:41,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:36:41,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 12 [2021-11-21 01:36:42,213 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 01:36:42,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:36:42,886 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 01:36:42,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165273805] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:36:42,887 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:36:42,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 11, 10, 7, 6] total 28 [2021-11-21 01:36:42,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352856972] [2021-11-21 01:36:42,887 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:36:42,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-21 01:36:42,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:36:42,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-21 01:36:42,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=667, Unknown=0, NotChecked=0, Total=812 [2021-11-21 01:36:42,889 INFO L87 Difference]: Start difference. First operand 145 states and 181 transitions. Second operand has 29 states, 28 states have (on average 3.357142857142857) internal successors, (94), 29 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:36:44,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:36:44,230 INFO L93 Difference]: Finished difference Result 194 states and 238 transitions. [2021-11-21 01:36:44,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-21 01:36:44,231 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 3.357142857142857) internal successors, (94), 29 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-21 01:36:44,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:36:44,233 INFO L225 Difference]: With dead ends: 194 [2021-11-21 01:36:44,233 INFO L226 Difference]: Without dead ends: 194 [2021-11-21 01:36:44,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 159 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=231, Invalid=959, Unknown=0, NotChecked=0, Total=1190 [2021-11-21 01:36:44,235 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 106 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-21 01:36:44,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 228 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 159 Invalid, 0 Unknown, 100 Unchecked, 0.6s Time] [2021-11-21 01:36:44,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-11-21 01:36:44,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 172. [2021-11-21 01:36:44,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 169 states have (on average 1.2485207100591715) internal successors, (211), 171 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:36:44,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 211 transitions. [2021-11-21 01:36:44,244 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 211 transitions. Word has length 32 [2021-11-21 01:36:44,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:36:44,245 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 211 transitions. [2021-11-21 01:36:44,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 3.357142857142857) internal successors, (94), 29 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:36:44,245 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 211 transitions. [2021-11-21 01:36:44,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-21 01:36:44,247 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:36:44,247 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:36:44,256 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (35)] Ended with exit code 0 [2021-11-21 01:36:44,483 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-21 01:36:44,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-11-21 01:36:44,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:36:44,856 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-21 01:36:44,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:36:44,857 INFO L85 PathProgramCache]: Analyzing trace with hash -823961093, now seen corresponding path program 1 times [2021-11-21 01:36:44,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:36:44,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [419558395] [2021-11-21 01:36:44,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:36:44,858 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:36:44,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:36:44,867 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:36:44,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-11-21 01:36:44,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:36:44,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-21 01:36:44,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:36:44,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 12 [2021-11-21 01:36:45,654 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 01:36:45,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:36:46,689 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 01:36:46,689 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:36:46,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [419558395] [2021-11-21 01:36:46,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [419558395] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:36:46,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1104076746] [2021-11-21 01:36:46,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:36:46,690 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:36:46,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:36:46,691 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:36:46,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2021-11-21 01:36:46,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:36:46,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-21 01:36:46,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:36:47,360 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:36:47,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:36:48,164 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:36:48,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1104076746] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:36:48,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497399500] [2021-11-21 01:36:48,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:36:48,165 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:36:48,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:36:48,166 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:36:48,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-21 01:36:48,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:36:48,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-21 01:36:48,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:36:48,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 12 [2021-11-21 01:36:48,806 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 01:36:48,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:36:50,624 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 01:36:50,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497399500] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:36:50,625 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:36:50,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 10, 9, 7, 7] total 32 [2021-11-21 01:36:50,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595693537] [2021-11-21 01:36:50,625 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:36:50,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-21 01:36:50,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:36:50,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-21 01:36:50,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=861, Unknown=0, NotChecked=0, Total=992 [2021-11-21 01:36:50,628 INFO L87 Difference]: Start difference. First operand 172 states and 211 transitions. Second operand has 32 states, 32 states have (on average 4.3125) internal successors, (138), 32 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:36:55,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:36:55,730 INFO L93 Difference]: Finished difference Result 277 states and 330 transitions. [2021-11-21 01:36:55,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-21 01:36:55,732 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 4.3125) internal successors, (138), 32 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-21 01:36:55,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:36:55,734 INFO L225 Difference]: With dead ends: 277 [2021-11-21 01:36:55,734 INFO L226 Difference]: Without dead ends: 267 [2021-11-21 01:36:55,736 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=375, Invalid=2381, Unknown=0, NotChecked=0, Total=2756 [2021-11-21 01:36:55,737 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 82 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-21 01:36:55,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 204 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 141 Invalid, 0 Unknown, 74 Unchecked, 1.6s Time] [2021-11-21 01:36:55,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-11-21 01:36:55,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 224. [2021-11-21 01:36:55,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 221 states have (on average 1.253393665158371) internal successors, (277), 223 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:36:55,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 277 transitions. [2021-11-21 01:36:55,747 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 277 transitions. Word has length 32 [2021-11-21 01:36:55,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:36:55,747 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 277 transitions. [2021-11-21 01:36:55,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.3125) internal successors, (138), 32 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:36:55,748 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 277 transitions. [2021-11-21 01:36:55,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-21 01:36:55,749 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:36:55,750 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:36:55,783 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2021-11-21 01:36:55,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (38)] Forceful destruction successful, exit code 0 [2021-11-21 01:36:56,176 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (37)] Ended with exit code 0 [2021-11-21 01:36:56,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:36:56,368 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-21 01:36:56,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:36:56,368 INFO L85 PathProgramCache]: Analyzing trace with hash 549279776, now seen corresponding path program 1 times [2021-11-21 01:36:56,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:36:56,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1281968727] [2021-11-21 01:36:56,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:36:56,369 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:36:56,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:36:56,370 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:36:56,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-11-21 01:36:56,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:36:56,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-21 01:36:56,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:36:56,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 12 [2021-11-21 01:36:57,446 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:36:57,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:36:59,701 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:36:59,702 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:36:59,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1281968727] [2021-11-21 01:36:59,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1281968727] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:36:59,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [868432428] [2021-11-21 01:36:59,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:36:59,702 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:36:59,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:36:59,724 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:36:59,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2021-11-21 01:36:59,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:36:59,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-21 01:36:59,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:36:59,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-21 01:37:01,517 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:37:01,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:37:04,534 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:37:04,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [868432428] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:37:04,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582028461] [2021-11-21 01:37:04,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:37:04,535 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:37:04,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:37:04,536 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:37:04,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-21 01:37:04,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:37:04,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-21 01:37:04,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:37:04,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-21 01:37:06,212 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 01:37:06,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:37:11,252 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 01:37:11,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582028461] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:37:11,253 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:37:11,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 12, 11, 8, 9] total 47 [2021-11-21 01:37:11,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964082898] [2021-11-21 01:37:11,253 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:37:11,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-21 01:37:11,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:37:11,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-21 01:37:11,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=1958, Unknown=0, NotChecked=0, Total=2256 [2021-11-21 01:37:11,256 INFO L87 Difference]: Start difference. First operand 224 states and 277 transitions. Second operand has 48 states, 47 states have (on average 3.297872340425532) internal successors, (155), 48 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:37:23,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:37:23,694 INFO L93 Difference]: Finished difference Result 256 states and 310 transitions. [2021-11-21 01:37:23,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-21 01:37:23,697 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 3.297872340425532) internal successors, (155), 48 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-11-21 01:37:23,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:37:23,699 INFO L225 Difference]: With dead ends: 256 [2021-11-21 01:37:23,699 INFO L226 Difference]: Without dead ends: 256 [2021-11-21 01:37:23,701 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 150 SyntacticMatches, 13 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1711 ImplicationChecksByTransitivity, 17.5s TimeCoverageRelationStatistics Valid=841, Invalid=4415, Unknown=0, NotChecked=0, Total=5256 [2021-11-21 01:37:23,702 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 439 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 947 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 266 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-11-21 01:37:23,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [439 Valid, 334 Invalid, 947 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 627 Invalid, 0 Unknown, 266 Unchecked, 3.8s Time] [2021-11-21 01:37:23,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-11-21 01:37:23,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 214. [2021-11-21 01:37:23,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 211 states have (on average 1.2559241706161137) internal successors, (265), 213 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:37:23,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 265 transitions. [2021-11-21 01:37:23,711 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 265 transitions. Word has length 33 [2021-11-21 01:37:23,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:37:23,711 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 265 transitions. [2021-11-21 01:37:23,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 3.297872340425532) internal successors, (155), 48 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:37:23,712 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 265 transitions. [2021-11-21 01:37:23,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-21 01:37:23,713 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:37:23,714 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1] [2021-11-21 01:37:23,725 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (41)] Ended with exit code 0 [2021-11-21 01:37:23,926 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (40)] Ended with exit code 0 [2021-11-21 01:37:24,144 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2021-11-21 01:37:24,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:37:24,317 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-21 01:37:24,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:37:24,317 INFO L85 PathProgramCache]: Analyzing trace with hash -563143139, now seen corresponding path program 3 times [2021-11-21 01:37:24,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:37:24,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [845781334] [2021-11-21 01:37:24,318 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:37:24,318 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:37:24,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:37:24,319 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:37:24,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-11-21 01:37:24,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-21 01:37:24,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:37:24,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-21 01:37:24,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:37:24,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-21 01:37:25,361 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:37:25,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:37:28,415 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:37:28,415 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:37:28,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [845781334] [2021-11-21 01:37:28,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [845781334] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:37:28,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [527340061] [2021-11-21 01:37:28,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:37:28,416 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:37:28,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:37:28,417 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:37:28,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (44)] Waiting until timeout for monitored process [2021-11-21 01:37:28,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-21 01:37:28,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:37:28,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-21 01:37:28,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:37:28,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-21 01:37:30,283 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:37:30,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:37:42,894 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:37:42,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [527340061] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:37:42,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006156569] [2021-11-21 01:37:42,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:37:42,895 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:37:42,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:37:42,896 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:37:42,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-11-21 01:37:44,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-21 01:37:44,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:37:44,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-21 01:37:44,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:37:44,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-21 01:37:45,606 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:37:45,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:37:54,395 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:37:54,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006156569] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:37:54,395 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:37:54,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 15, 15, 14, 14] total 54 [2021-11-21 01:37:54,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149064531] [2021-11-21 01:37:54,396 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:37:54,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-11-21 01:37:54,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:37:54,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-11-21 01:37:54,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=819, Invalid=2151, Unknown=0, NotChecked=0, Total=2970 [2021-11-21 01:37:54,399 INFO L87 Difference]: Start difference. First operand 214 states and 265 transitions. Second operand has 55 states, 54 states have (on average 2.888888888888889) internal successors, (156), 55 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:38:00,524 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:38:02,565 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:38:04,620 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:38:06,623 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:38:12,954 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:38:14,677 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:38:16,410 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:38:18,413 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:38:23,446 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:38:35,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:38:35,912 INFO L93 Difference]: Finished difference Result 1678 states and 2164 transitions. [2021-11-21 01:38:35,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-21 01:38:35,915 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 54 states have (on average 2.888888888888889) internal successors, (156), 55 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-21 01:38:35,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:38:35,926 INFO L225 Difference]: With dead ends: 1678 [2021-11-21 01:38:35,927 INFO L226 Difference]: Without dead ends: 1678 [2021-11-21 01:38:35,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 151 SyntacticMatches, 5 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2646 ImplicationChecksByTransitivity, 31.0s TimeCoverageRelationStatistics Valid=1677, Invalid=4023, Unknown=0, NotChecked=0, Total=5700 [2021-11-21 01:38:35,930 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 2374 mSDsluCounter, 1005 mSDsCounter, 0 mSdLazyCounter, 1350 mSolverCounterSat, 79 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2374 SdHoareTripleChecker+Valid, 1068 SdHoareTripleChecker+Invalid, 1523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1350 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 24.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:38:35,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2374 Valid, 1068 Invalid, 1523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1350 Invalid, 6 Unknown, 88 Unchecked, 24.0s Time] [2021-11-21 01:38:35,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1678 states. [2021-11-21 01:38:35,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1678 to 246. [2021-11-21 01:38:35,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 243 states have (on average 1.2551440329218106) internal successors, (305), 245 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:38:35,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 305 transitions. [2021-11-21 01:38:35,953 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 305 transitions. Word has length 34 [2021-11-21 01:38:35,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:38:35,954 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 305 transitions. [2021-11-21 01:38:35,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 54 states have (on average 2.888888888888889) internal successors, (156), 55 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:38:35,954 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 305 transitions. [2021-11-21 01:38:35,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-21 01:38:35,956 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:38:35,956 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:38:35,991 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-11-21 01:38:36,185 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (43)] Ended with exit code 0 [2021-11-21 01:38:36,377 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (44)] Forceful destruction successful, exit code 0 [2021-11-21 01:38:36,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt [2021-11-21 01:38:36,576 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-21 01:38:36,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:38:36,576 INFO L85 PathProgramCache]: Analyzing trace with hash -249046629, now seen corresponding path program 2 times [2021-11-21 01:38:36,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:38:36,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2023316526] [2021-11-21 01:38:36,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 01:38:36,577 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:38:36,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:38:36,578 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:38:36,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2021-11-21 01:38:36,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 01:38:36,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:38:36,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-21 01:38:36,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:38:36,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 12 [2021-11-21 01:38:37,850 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:38:37,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:38:40,234 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:38:40,235 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:38:40,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2023316526] [2021-11-21 01:38:40,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2023316526] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:38:40,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [481602528] [2021-11-21 01:38:40,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 01:38:40,235 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:38:40,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:38:40,238 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:38:40,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (47)] Waiting until timeout for monitored process [2021-11-21 01:38:40,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 01:38:40,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:38:40,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-21 01:38:40,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:38:41,683 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-21 01:38:41,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:38:43,996 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-21 01:38:43,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [481602528] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:38:43,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197348460] [2021-11-21 01:38:43,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 01:38:43,996 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:38:43,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:38:43,997 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:38:43,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-11-21 01:38:44,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 01:38:44,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:38:44,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-21 01:38:44,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:38:45,376 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-21 01:38:45,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:38:46,751 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-21 01:38:46,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197348460] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:38:46,751 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:38:46,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 13, 12, 9, 7] total 49 [2021-11-21 01:38:46,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925686513] [2021-11-21 01:38:46,752 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:38:46,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-21 01:38:46,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:38:46,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-21 01:38:46,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=2127, Unknown=0, NotChecked=0, Total=2352 [2021-11-21 01:38:46,754 INFO L87 Difference]: Start difference. First operand 246 states and 305 transitions. Second operand has 49 states, 49 states have (on average 3.1020408163265305) internal successors, (152), 49 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:39:11,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:39:11,412 INFO L93 Difference]: Finished difference Result 414 states and 500 transitions. [2021-11-21 01:39:11,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-11-21 01:39:11,412 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.1020408163265305) internal successors, (152), 49 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-21 01:39:11,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:39:11,415 INFO L225 Difference]: With dead ends: 414 [2021-11-21 01:39:11,415 INFO L226 Difference]: Without dead ends: 396 [2021-11-21 01:39:11,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 171 SyntacticMatches, 3 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3115 ImplicationChecksByTransitivity, 28.9s TimeCoverageRelationStatistics Valid=1053, Invalid=10289, Unknown=0, NotChecked=0, Total=11342 [2021-11-21 01:39:11,419 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 191 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 224 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-11-21 01:39:11,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 482 Invalid, 817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 578 Invalid, 0 Unknown, 224 Unchecked, 2.6s Time] [2021-11-21 01:39:11,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-11-21 01:39:11,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 306. [2021-11-21 01:39:11,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 303 states have (on average 1.2541254125412542) internal successors, (380), 305 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:39:11,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 380 transitions. [2021-11-21 01:39:11,432 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 380 transitions. Word has length 35 [2021-11-21 01:39:11,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:39:11,432 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 380 transitions. [2021-11-21 01:39:11,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.1020408163265305) internal successors, (152), 49 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:39:11,433 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 380 transitions. [2021-11-21 01:39:11,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-21 01:39:11,434 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:39:11,434 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:39:11,460 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2021-11-21 01:39:11,677 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2021-11-21 01:39:11,852 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (47)] Ended with exit code 0 [2021-11-21 01:39:12,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt [2021-11-21 01:39:12,050 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-21 01:39:12,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:39:12,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1302514410, now seen corresponding path program 2 times [2021-11-21 01:39:12,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:39:12,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1912356391] [2021-11-21 01:39:12,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 01:39:12,051 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:39:12,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:39:12,052 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:39:12,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2021-11-21 01:39:12,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 01:39:12,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:39:12,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-21 01:39:12,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:39:12,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 12 [2021-11-21 01:39:12,957 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 01:39:12,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:39:14,941 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 01:39:14,941 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:39:14,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1912356391] [2021-11-21 01:39:14,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1912356391] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:39:14,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1538876470] [2021-11-21 01:39:14,941 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 01:39:14,942 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:39:14,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:39:14,942 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:39:14,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (50)] Waiting until timeout for monitored process [2021-11-21 01:39:15,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 01:39:15,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:39:15,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-21 01:39:15,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:39:16,197 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:39:16,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:39:18,374 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:39:18,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1538876470] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:39:18,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094142578] [2021-11-21 01:39:18,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 01:39:18,375 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:39:18,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:39:18,376 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:39:18,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-11-21 01:39:18,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 01:39:18,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:39:18,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-21 01:39:18,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:39:18,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 12 [2021-11-21 01:39:19,144 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 01:39:19,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:39:22,665 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 01:39:22,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094142578] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:39:22,665 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:39:22,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 13, 12, 10, 9] total 43 [2021-11-21 01:39:22,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348612767] [2021-11-21 01:39:22,666 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:39:22,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-21 01:39:22,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:39:22,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-21 01:39:22,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1600, Unknown=0, NotChecked=0, Total=1806 [2021-11-21 01:39:22,669 INFO L87 Difference]: Start difference. First operand 306 states and 380 transitions. Second operand has 43 states, 43 states have (on average 3.1627906976744184) internal successors, (136), 43 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:39:36,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:39:36,818 INFO L93 Difference]: Finished difference Result 354 states and 436 transitions. [2021-11-21 01:39:36,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-21 01:39:36,819 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.1627906976744184) internal successors, (136), 43 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-21 01:39:36,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:39:36,821 INFO L225 Difference]: With dead ends: 354 [2021-11-21 01:39:36,821 INFO L226 Difference]: Without dead ends: 354 [2021-11-21 01:39:36,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 181 SyntacticMatches, 7 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1781 ImplicationChecksByTransitivity, 19.7s TimeCoverageRelationStatistics Valid=782, Invalid=4768, Unknown=0, NotChecked=0, Total=5550 [2021-11-21 01:39:36,824 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 108 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:39:36,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 291 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 98 Invalid, 0 Unknown, 31 Unchecked, 1.2s Time] [2021-11-21 01:39:36,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-11-21 01:39:36,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 341. [2021-11-21 01:39:36,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 338 states have (on average 1.2603550295857988) internal successors, (426), 340 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:39:36,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 426 transitions. [2021-11-21 01:39:36,835 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 426 transitions. Word has length 36 [2021-11-21 01:39:36,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:39:36,835 INFO L470 AbstractCegarLoop]: Abstraction has 341 states and 426 transitions. [2021-11-21 01:39:36,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.1627906976744184) internal successors, (136), 43 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:39:36,836 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 426 transitions. [2021-11-21 01:39:36,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-21 01:39:36,837 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:39:36,837 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:39:36,872 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-11-21 01:39:37,053 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (50)] Forceful destruction successful, exit code 0 [2021-11-21 01:39:37,264 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (49)] Ended with exit code 0 [2021-11-21 01:39:37,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:39:37,452 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-21 01:39:37,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:39:37,452 INFO L85 PathProgramCache]: Analyzing trace with hash -386671888, now seen corresponding path program 1 times [2021-11-21 01:39:37,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:39:37,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [573759714] [2021-11-21 01:39:37,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:39:37,453 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:39:37,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:39:37,454 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:39:37,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2021-11-21 01:39:37,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:39:37,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-21 01:39:37,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:39:37,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 12 [2021-11-21 01:39:38,239 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 01:39:38,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:39:40,376 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 01:39:40,377 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:39:40,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [573759714] [2021-11-21 01:39:40,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [573759714] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:39:40,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1164686047] [2021-11-21 01:39:40,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:39:40,377 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:39:40,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:39:40,378 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:39:40,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (53)] Waiting until timeout for monitored process [2021-11-21 01:39:40,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:39:40,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-21 01:39:40,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:39:41,474 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-21 01:39:41,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:39:43,062 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-21 01:39:43,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1164686047] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:39:43,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013846052] [2021-11-21 01:39:43,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:39:43,063 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:39:43,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:39:43,063 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:39:43,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-11-21 01:39:43,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:39:43,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-21 01:39:43,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:39:43,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 12 [2021-11-21 01:39:43,890 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 01:39:43,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:39:47,421 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 01:39:47,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013846052] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:39:47,422 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:39:47,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 11, 10, 10, 9] total 39 [2021-11-21 01:39:47,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124778551] [2021-11-21 01:39:47,422 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:39:47,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-21 01:39:47,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:39:47,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-21 01:39:47,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1297, Unknown=0, NotChecked=0, Total=1482 [2021-11-21 01:39:47,424 INFO L87 Difference]: Start difference. First operand 341 states and 426 transitions. Second operand has 39 states, 39 states have (on average 3.7948717948717947) internal successors, (148), 39 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:40:00,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:40:00,229 INFO L93 Difference]: Finished difference Result 344 states and 434 transitions. [2021-11-21 01:40:00,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-21 01:40:00,229 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.7948717948717947) internal successors, (148), 39 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-11-21 01:40:00,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:40:00,233 INFO L225 Difference]: With dead ends: 344 [2021-11-21 01:40:00,233 INFO L226 Difference]: Without dead ends: 330 [2021-11-21 01:40:00,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 192 SyntacticMatches, 6 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1270 ImplicationChecksByTransitivity, 17.9s TimeCoverageRelationStatistics Valid=602, Invalid=3430, Unknown=0, NotChecked=0, Total=4032 [2021-11-21 01:40:00,241 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 100 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-21 01:40:00,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 284 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 76 Invalid, 0 Unknown, 37 Unchecked, 0.8s Time] [2021-11-21 01:40:00,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-11-21 01:40:00,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 317. [2021-11-21 01:40:00,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 314 states have (on average 1.3089171974522293) internal successors, (411), 316 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:40:00,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 411 transitions. [2021-11-21 01:40:00,252 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 411 transitions. Word has length 38 [2021-11-21 01:40:00,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:40:00,252 INFO L470 AbstractCegarLoop]: Abstraction has 317 states and 411 transitions. [2021-11-21 01:40:00,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.7948717948717947) internal successors, (148), 39 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:40:00,253 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 411 transitions. [2021-11-21 01:40:00,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-21 01:40:00,254 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:40:00,254 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:40:00,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (52)] Forceful destruction successful, exit code 0 [2021-11-21 01:40:00,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (53)] Forceful destruction successful, exit code 0 [2021-11-21 01:40:00,696 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-11-21 01:40:00,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:40:00,870 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-21 01:40:00,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:40:00,870 INFO L85 PathProgramCache]: Analyzing trace with hash -710345958, now seen corresponding path program 2 times [2021-11-21 01:40:00,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:40:00,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [491612894] [2021-11-21 01:40:00,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 01:40:00,871 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:40:00,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:40:00,872 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:40:00,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2021-11-21 01:40:00,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 01:40:00,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:40:00,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-21 01:40:00,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:40:00,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 12 [2021-11-21 01:40:01,804 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-21 01:40:01,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:40:03,183 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 18 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-21 01:40:03,183 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:40:03,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [491612894] [2021-11-21 01:40:03,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [491612894] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:40:03,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1578056506] [2021-11-21 01:40:03,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 01:40:03,184 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:40:03,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:40:03,185 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:40:03,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (56)] Waiting until timeout for monitored process [2021-11-21 01:40:03,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 01:40:03,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:40:03,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-21 01:40:03,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:40:04,410 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-21 01:40:04,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:40:06,212 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-21 01:40:06,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1578056506] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:40:06,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940577637] [2021-11-21 01:40:06,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 01:40:06,213 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:40:06,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:40:06,214 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:40:06,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-11-21 01:40:06,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 01:40:06,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:40:06,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-21 01:40:06,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:40:06,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 12 [2021-11-21 01:40:06,972 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-21 01:40:06,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:40:07,676 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 18 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-21 01:40:07,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940577637] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:40:07,676 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:40:07,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 13, 12, 8, 7] total 35 [2021-11-21 01:40:07,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287242760] [2021-11-21 01:40:07,677 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:40:07,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-21 01:40:07,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:40:07,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-21 01:40:07,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1051, Unknown=0, NotChecked=0, Total=1190 [2021-11-21 01:40:07,678 INFO L87 Difference]: Start difference. First operand 317 states and 411 transitions. Second operand has 35 states, 35 states have (on average 3.342857142857143) internal successors, (117), 35 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:40:11,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:40:11,586 INFO L93 Difference]: Finished difference Result 458 states and 563 transitions. [2021-11-21 01:40:11,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-21 01:40:11,588 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.342857142857143) internal successors, (117), 35 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-11-21 01:40:11,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:40:11,591 INFO L225 Difference]: With dead ends: 458 [2021-11-21 01:40:11,591 INFO L226 Difference]: Without dead ends: 441 [2021-11-21 01:40:11,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 209 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 730 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=354, Invalid=2508, Unknown=0, NotChecked=0, Total=2862 [2021-11-21 01:40:11,592 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 152 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 222 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:40:11,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 331 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 220 Invalid, 0 Unknown, 222 Unchecked, 1.1s Time] [2021-11-21 01:40:11,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2021-11-21 01:40:11,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 360. [2021-11-21 01:40:11,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 357 states have (on average 1.2492997198879552) internal successors, (446), 359 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:40:11,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 446 transitions. [2021-11-21 01:40:11,603 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 446 transitions. Word has length 39 [2021-11-21 01:40:11,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:40:11,604 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 446 transitions. [2021-11-21 01:40:11,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.342857142857143) internal successors, (117), 35 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:40:11,605 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 446 transitions. [2021-11-21 01:40:11,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-21 01:40:11,606 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:40:11,606 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:40:11,620 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (56)] Ended with exit code 0 [2021-11-21 01:40:11,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (55)] Forceful destruction successful, exit code 0 [2021-11-21 01:40:12,036 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-11-21 01:40:12,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:40:12,209 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-21 01:40:12,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:40:12,209 INFO L85 PathProgramCache]: Analyzing trace with hash 799217830, now seen corresponding path program 2 times [2021-11-21 01:40:12,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:40:12,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [817306645] [2021-11-21 01:40:12,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 01:40:12,210 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:40:12,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:40:12,211 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:40:12,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2021-11-21 01:40:12,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 01:40:12,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:40:12,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-21 01:40:12,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:40:12,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-21 01:40:13,571 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-21 01:40:13,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:40:17,769 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-21 01:40:17,769 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:40:17,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [817306645] [2021-11-21 01:40:17,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [817306645] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:40:17,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1267809178] [2021-11-21 01:40:17,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 01:40:17,770 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:40:17,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:40:17,771 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:40:17,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (59)] Waiting until timeout for monitored process [2021-11-21 01:40:17,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 01:40:17,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:40:17,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-21 01:40:17,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:40:19,523 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 6 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:40:19,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:40:22,217 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 6 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:40:22,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1267809178] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:40:22,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638356355] [2021-11-21 01:40:22,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 01:40:22,217 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:40:22,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:40:22,219 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:40:22,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-11-21 01:40:22,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 01:40:22,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:40:22,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-21 01:40:22,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:40:22,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-21 01:40:23,520 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-21 01:40:23,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:40:31,574 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-21 01:40:31,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638356355] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:40:31,575 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:40:31,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 15, 14, 11, 12] total 56 [2021-11-21 01:40:31,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143888806] [2021-11-21 01:40:31,575 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:40:31,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-11-21 01:40:31,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:40:31,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-11-21 01:40:31,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=389, Invalid=2691, Unknown=0, NotChecked=0, Total=3080 [2021-11-21 01:40:31,577 INFO L87 Difference]: Start difference. First operand 360 states and 446 transitions. Second operand has 56 states, 56 states have (on average 2.875) internal successors, (161), 56 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:41:27,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:41:27,855 INFO L93 Difference]: Finished difference Result 1402 states and 1699 transitions. [2021-11-21 01:41:27,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-11-21 01:41:27,855 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.875) internal successors, (161), 56 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-21 01:41:27,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:41:27,862 INFO L225 Difference]: With dead ends: 1402 [2021-11-21 01:41:27,862 INFO L226 Difference]: Without dead ends: 1402 [2021-11-21 01:41:27,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 186 SyntacticMatches, 3 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6732 ImplicationChecksByTransitivity, 49.9s TimeCoverageRelationStatistics Valid=3572, Invalid=17598, Unknown=0, NotChecked=0, Total=21170 [2021-11-21 01:41:27,866 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 2319 mSDsluCounter, 890 mSDsCounter, 0 mSdLazyCounter, 2380 mSolverCounterSat, 395 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2319 SdHoareTripleChecker+Valid, 922 SdHoareTripleChecker+Invalid, 2837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 395 IncrementalHoareTripleChecker+Valid, 2380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 18.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:41:27,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2319 Valid, 922 Invalid, 2837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [395 Valid, 2380 Invalid, 0 Unknown, 62 Unchecked, 18.0s Time] [2021-11-21 01:41:27,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1402 states. [2021-11-21 01:41:27,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1402 to 659. [2021-11-21 01:41:27,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 659 states, 656 states have (on average 1.2149390243902438) internal successors, (797), 658 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:41:27,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 797 transitions. [2021-11-21 01:41:27,896 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 797 transitions. Word has length 41 [2021-11-21 01:41:27,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:41:27,896 INFO L470 AbstractCegarLoop]: Abstraction has 659 states and 797 transitions. [2021-11-21 01:41:27,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.875) internal successors, (161), 56 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:41:27,897 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 797 transitions. [2021-11-21 01:41:27,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-21 01:41:27,898 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:41:27,898 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:41:27,940 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-11-21 01:41:28,137 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (59)] Ended with exit code 0 [2021-11-21 01:41:28,345 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (58)] Forceful destruction successful, exit code 0 [2021-11-21 01:41:28,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:41:28,535 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-21 01:41:28,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:41:28,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1824368368, now seen corresponding path program 1 times [2021-11-21 01:41:28,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:41:28,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1009336118] [2021-11-21 01:41:28,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:41:28,537 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:41:28,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:41:28,538 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:41:28,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (61)] Waiting until timeout for monitored process [2021-11-21 01:41:28,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:41:28,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-21 01:41:28,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:41:28,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 12 [2021-11-21 01:41:29,782 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-21 01:41:29,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:41:30,856 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-21 01:41:30,857 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:41:30,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1009336118] [2021-11-21 01:41:30,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1009336118] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:41:30,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [589146410] [2021-11-21 01:41:30,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:41:30,858 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:41:30,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:41:30,859 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:41:30,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (62)] Waiting until timeout for monitored process [2021-11-21 01:41:31,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:41:31,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-21 01:41:31,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:41:31,847 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-21 01:41:31,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:41:33,415 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-21 01:41:33,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [589146410] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:41:33,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685398434] [2021-11-21 01:41:33,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:41:33,416 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:41:33,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:41:33,417 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:41:33,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-11-21 01:41:33,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:41:33,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-21 01:41:33,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:41:33,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 12 [2021-11-21 01:41:34,260 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-21 01:41:34,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:41:36,492 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-21 01:41:36,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685398434] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:41:36,492 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:41:36,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 13, 11, 7, 7] total 37 [2021-11-21 01:41:36,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693472282] [2021-11-21 01:41:36,493 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:41:36,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-21 01:41:36,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:41:36,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-21 01:41:36,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1173, Unknown=0, NotChecked=0, Total=1332 [2021-11-21 01:41:36,495 INFO L87 Difference]: Start difference. First operand 659 states and 797 transitions. Second operand has 37 states, 37 states have (on average 4.378378378378378) internal successors, (162), 37 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:41:41,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:41:41,044 INFO L93 Difference]: Finished difference Result 852 states and 1023 transitions. [2021-11-21 01:41:41,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-21 01:41:41,044 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 4.378378378378378) internal successors, (162), 37 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-21 01:41:41,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:41:41,050 INFO L225 Difference]: With dead ends: 852 [2021-11-21 01:41:41,050 INFO L226 Difference]: Without dead ends: 852 [2021-11-21 01:41:41,051 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 904 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=465, Invalid=3195, Unknown=0, NotChecked=0, Total=3660 [2021-11-21 01:41:41,052 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 87 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:41:41,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 167 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2021-11-21 01:41:41,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 852 states. [2021-11-21 01:41:41,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 852 to 562. [2021-11-21 01:41:41,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 559 states have (on average 1.2110912343470484) internal successors, (677), 561 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:41:41,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 677 transitions. [2021-11-21 01:41:41,083 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 677 transitions. Word has length 44 [2021-11-21 01:41:41,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:41:41,083 INFO L470 AbstractCegarLoop]: Abstraction has 562 states and 677 transitions. [2021-11-21 01:41:41,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 4.378378378378378) internal successors, (162), 37 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:41:41,084 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 677 transitions. [2021-11-21 01:41:41,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-21 01:41:41,085 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:41:41,085 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:41:41,103 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (62)] Forceful destruction successful, exit code 0 [2021-11-21 01:41:41,298 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (61)] Ended with exit code 0 [2021-11-21 01:41:41,517 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2021-11-21 01:41:41,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:41:41,689 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-21 01:41:41,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:41:41,690 INFO L85 PathProgramCache]: Analyzing trace with hash 207140145, now seen corresponding path program 1 times [2021-11-21 01:41:41,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:41:41,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [437409015] [2021-11-21 01:41:41,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:41:41,690 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:41:41,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:41:41,691 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:41:41,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (64)] Waiting until timeout for monitored process [2021-11-21 01:41:41,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:41:41,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-21 01:41:41,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:41:41,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 12 [2021-11-21 01:41:43,858 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-21 01:41:43,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:41:45,276 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 18 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-21 01:41:45,276 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:41:45,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [437409015] [2021-11-21 01:41:45,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [437409015] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:41:45,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [342600204] [2021-11-21 01:41:45,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:41:45,277 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:41:45,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:41:45,279 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:41:45,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (65)] Waiting until timeout for monitored process [2021-11-21 01:41:45,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:41:45,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-21 01:41:45,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:41:46,437 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-21 01:41:46,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:41:48,234 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-21 01:41:48,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [342600204] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:41:48,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169850696] [2021-11-21 01:41:48,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:41:48,235 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:41:48,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:41:48,236 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:41:48,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-11-21 01:41:48,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:41:48,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-21 01:41:48,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:41:48,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 12 [2021-11-21 01:41:49,181 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-21 01:41:49,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:41:49,952 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 18 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-21 01:41:49,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169850696] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:41:49,952 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:41:49,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 13, 12, 8, 7] total 35 [2021-11-21 01:41:49,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308009391] [2021-11-21 01:41:49,953 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:41:49,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-21 01:41:49,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:41:49,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-21 01:41:49,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1051, Unknown=0, NotChecked=0, Total=1190 [2021-11-21 01:41:49,961 INFO L87 Difference]: Start difference. First operand 562 states and 677 transitions. Second operand has 35 states, 35 states have (on average 4.142857142857143) internal successors, (145), 35 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:41:52,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:41:52,155 INFO L93 Difference]: Finished difference Result 625 states and 746 transitions. [2021-11-21 01:41:52,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-21 01:41:52,155 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 4.142857142857143) internal successors, (145), 35 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-21 01:41:52,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:41:52,159 INFO L225 Difference]: With dead ends: 625 [2021-11-21 01:41:52,159 INFO L226 Difference]: Without dead ends: 621 [2021-11-21 01:41:52,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 248 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 648 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=319, Invalid=2231, Unknown=0, NotChecked=0, Total=2550 [2021-11-21 01:41:52,160 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 49 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:41:52,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 208 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 28 Invalid, 0 Unknown, 38 Unchecked, 0.1s Time] [2021-11-21 01:41:52,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2021-11-21 01:41:52,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 616. [2021-11-21 01:41:52,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 616 states, 613 states have (on average 1.2022838499184338) internal successors, (737), 615 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:41:52,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 737 transitions. [2021-11-21 01:41:52,179 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 737 transitions. Word has length 45 [2021-11-21 01:41:52,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:41:52,179 INFO L470 AbstractCegarLoop]: Abstraction has 616 states and 737 transitions. [2021-11-21 01:41:52,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 4.142857142857143) internal successors, (145), 35 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:41:52,180 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 737 transitions. [2021-11-21 01:41:52,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-21 01:41:52,181 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:41:52,181 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:41:52,196 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (65)] Forceful destruction successful, exit code 0 [2021-11-21 01:41:52,410 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2021-11-21 01:41:52,594 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (64)] Forceful destruction successful, exit code 0 [2021-11-21 01:41:52,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:41:52,785 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-21 01:41:52,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:41:52,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1133751993, now seen corresponding path program 2 times [2021-11-21 01:41:52,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:41:52,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1657445628] [2021-11-21 01:41:52,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 01:41:52,786 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:41:52,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:41:52,787 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:41:52,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (67)] Waiting until timeout for monitored process [2021-11-21 01:41:52,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 01:41:52,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:41:52,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-21 01:41:52,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:41:52,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 12 [2021-11-21 01:41:55,679 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 19 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 01:41:55,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:41:58,343 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 5 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 01:41:58,344 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:41:58,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1657445628] [2021-11-21 01:41:58,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1657445628] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:41:58,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1971899914] [2021-11-21 01:41:58,344 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 01:41:58,344 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:41:58,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:41:58,346 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:41:58,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (68)] Waiting until timeout for monitored process [2021-11-21 01:41:58,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 01:41:58,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:41:58,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-21 01:41:58,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:41:59,747 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 37 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-21 01:41:59,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:42:01,712 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 37 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-21 01:42:01,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1971899914] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:42:01,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652831088] [2021-11-21 01:42:01,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 01:42:01,713 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:42:01,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:42:01,714 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:42:01,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-11-21 01:42:01,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 01:42:01,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:42:01,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-21 01:42:01,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:42:01,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 12 [2021-11-21 01:42:02,666 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 19 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 01:42:02,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:42:04,222 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 5 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 01:42:04,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652831088] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:42:04,222 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:42:04,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 13, 12, 9, 9] total 38 [2021-11-21 01:42:04,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047197394] [2021-11-21 01:42:04,223 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:42:04,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-21 01:42:04,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:42:04,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-21 01:42:04,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1247, Unknown=0, NotChecked=0, Total=1406 [2021-11-21 01:42:04,224 INFO L87 Difference]: Start difference. First operand 616 states and 737 transitions. Second operand has 38 states, 38 states have (on average 4.578947368421052) internal successors, (174), 38 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:42:12,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:42:12,045 INFO L93 Difference]: Finished difference Result 921 states and 1102 transitions. [2021-11-21 01:42:12,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-21 01:42:12,047 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 4.578947368421052) internal successors, (174), 38 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-21 01:42:12,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:42:12,051 INFO L225 Difference]: With dead ends: 921 [2021-11-21 01:42:12,051 INFO L226 Difference]: Without dead ends: 872 [2021-11-21 01:42:12,052 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 284 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1302 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=518, Invalid=3904, Unknown=0, NotChecked=0, Total=4422 [2021-11-21 01:42:12,053 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 98 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-21 01:42:12,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 374 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 135 Invalid, 0 Unknown, 83 Unchecked, 0.8s Time] [2021-11-21 01:42:12,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 872 states. [2021-11-21 01:42:12,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 872 to 815. [2021-11-21 01:42:12,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 815 states, 812 states have (on average 1.2229064039408868) internal successors, (993), 814 states have internal predecessors, (993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:42:12,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 815 states to 815 states and 993 transitions. [2021-11-21 01:42:12,077 INFO L78 Accepts]: Start accepts. Automaton has 815 states and 993 transitions. Word has length 52 [2021-11-21 01:42:12,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:42:12,077 INFO L470 AbstractCegarLoop]: Abstraction has 815 states and 993 transitions. [2021-11-21 01:42:12,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 4.578947368421052) internal successors, (174), 38 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:42:12,078 INFO L276 IsEmpty]: Start isEmpty. Operand 815 states and 993 transitions. [2021-11-21 01:42:12,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-21 01:42:12,080 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:42:12,080 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:42:12,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2021-11-21 01:42:12,310 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (68)] Forceful destruction successful, exit code 0 [2021-11-21 01:42:12,513 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (67)] Ended with exit code 0 [2021-11-21 01:42:12,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:42:12,704 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-21 01:42:12,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:42:12,704 INFO L85 PathProgramCache]: Analyzing trace with hash -885489231, now seen corresponding path program 3 times [2021-11-21 01:42:12,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:42:12,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1999670324] [2021-11-21 01:42:12,705 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:42:12,705 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:42:12,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:42:12,706 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:42:12,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (70)] Waiting until timeout for monitored process [2021-11-21 01:42:12,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-21 01:42:12,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:42:12,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-21 01:42:12,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:42:12,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-21 01:42:14,071 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-21 01:42:14,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:42:17,703 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-21 01:42:17,703 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:42:17,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1999670324] [2021-11-21 01:42:17,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1999670324] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:42:17,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [618003188] [2021-11-21 01:42:17,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:42:17,704 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:42:17,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:42:17,705 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:42:17,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (71)] Waiting until timeout for monitored process [2021-11-21 01:42:18,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-21 01:42:18,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:42:18,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-21 01:42:18,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:42:18,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-21 01:42:20,471 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 13 proven. 41 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-21 01:42:20,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:42:28,690 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-21 01:42:28,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [618003188] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:42:28,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936237335] [2021-11-21 01:42:28,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:42:28,690 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:42:28,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:42:28,691 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:42:28,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-11-21 01:42:28,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-21 01:42:28,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:42:28,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-21 01:42:28,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:42:28,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-21 01:42:29,989 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-21 01:42:29,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:42:36,549 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-21 01:42:36,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936237335] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:42:36,549 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:42:36,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 11, 11, 10, 11] total 42 [2021-11-21 01:42:36,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670036833] [2021-11-21 01:42:36,550 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:42:36,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-21 01:42:36,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:42:36,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-21 01:42:36,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=1526, Unknown=0, NotChecked=0, Total=1806 [2021-11-21 01:42:36,552 INFO L87 Difference]: Start difference. First operand 815 states and 993 transitions. Second operand has 43 states, 42 states have (on average 3.380952380952381) internal successors, (142), 43 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:42:52,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:42:52,797 INFO L93 Difference]: Finished difference Result 1312 states and 1620 transitions. [2021-11-21 01:42:52,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-21 01:42:52,797 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 3.380952380952381) internal successors, (142), 43 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-21 01:42:52,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:42:52,804 INFO L225 Difference]: With dead ends: 1312 [2021-11-21 01:42:52,804 INFO L226 Difference]: Without dead ends: 1312 [2021-11-21 01:42:52,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 279 SyntacticMatches, 8 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1577 ImplicationChecksByTransitivity, 24.4s TimeCoverageRelationStatistics Valid=708, Invalid=3582, Unknown=0, NotChecked=0, Total=4290 [2021-11-21 01:42:52,806 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 206 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 114 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:42:52,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 382 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 437 Invalid, 0 Unknown, 114 Unchecked, 4.0s Time] [2021-11-21 01:42:52,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1312 states. [2021-11-21 01:42:52,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1312 to 1267. [2021-11-21 01:42:52,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1267 states, 1264 states have (on average 1.25) internal successors, (1580), 1266 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:42:52,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1267 states to 1267 states and 1580 transitions. [2021-11-21 01:42:52,840 INFO L78 Accepts]: Start accepts. Automaton has 1267 states and 1580 transitions. Word has length 53 [2021-11-21 01:42:52,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:42:52,840 INFO L470 AbstractCegarLoop]: Abstraction has 1267 states and 1580 transitions. [2021-11-21 01:42:52,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 3.380952380952381) internal successors, (142), 43 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:42:52,841 INFO L276 IsEmpty]: Start isEmpty. Operand 1267 states and 1580 transitions. [2021-11-21 01:42:52,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-21 01:42:52,843 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:42:52,843 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:42:52,860 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (71)] Forceful destruction successful, exit code 0 [2021-11-21 01:42:53,057 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (70)] Forceful destruction successful, exit code 0 [2021-11-21 01:42:53,275 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2021-11-21 01:42:53,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:42:53,447 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-21 01:42:53,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:42:53,448 INFO L85 PathProgramCache]: Analyzing trace with hash -2111620554, now seen corresponding path program 3 times [2021-11-21 01:42:53,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:42:53,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1961925286] [2021-11-21 01:42:53,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:42:53,449 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:42:53,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:42:53,450 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:42:53,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (73)] Waiting until timeout for monitored process [2021-11-21 01:42:53,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-21 01:42:53,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:42:53,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-21 01:42:53,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:42:53,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-21 01:42:54,445 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-21 01:42:54,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:42:57,106 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-21 01:42:57,106 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:42:57,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1961925286] [2021-11-21 01:42:57,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1961925286] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:42:57,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1926538507] [2021-11-21 01:42:57,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:42:57,107 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:42:57,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:42:57,108 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:42:57,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (74)] Waiting until timeout for monitored process [2021-11-21 01:42:57,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-21 01:42:57,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:42:57,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-21 01:42:57,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:42:57,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-21 01:42:58,165 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-21 01:42:58,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:43:02,276 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-21 01:43:02,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1926538507] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:43:02,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625540215] [2021-11-21 01:43:02,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:43:02,277 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:43:02,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:43:02,280 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:43:02,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-11-21 01:43:02,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-21 01:43:02,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:43:02,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-21 01:43:02,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:43:02,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-21 01:43:03,174 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-21 01:43:03,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:43:05,177 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-21 01:43:05,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625540215] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:43:05,178 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:43:05,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7, 8, 7, 8] total 20 [2021-11-21 01:43:05,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747326837] [2021-11-21 01:43:05,181 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:43:05,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-21 01:43:05,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:43:05,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-21 01:43:05,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-11-21 01:43:05,182 INFO L87 Difference]: Start difference. First operand 1267 states and 1580 transitions. Second operand has 21 states, 20 states have (on average 5.05) internal successors, (101), 21 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:43:11,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:43:11,238 INFO L93 Difference]: Finished difference Result 1362 states and 1685 transitions. [2021-11-21 01:43:11,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-21 01:43:11,240 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 5.05) internal successors, (101), 21 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-21 01:43:11,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:43:11,246 INFO L225 Difference]: With dead ends: 1362 [2021-11-21 01:43:11,246 INFO L226 Difference]: Without dead ends: 1362 [2021-11-21 01:43:11,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 296 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=283, Invalid=1049, Unknown=0, NotChecked=0, Total=1332 [2021-11-21 01:43:11,247 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 105 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-21 01:43:11,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 99 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 227 Invalid, 0 Unknown, 14 Unchecked, 1.6s Time] [2021-11-21 01:43:11,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1362 states. [2021-11-21 01:43:11,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1362 to 1159. [2021-11-21 01:43:11,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1159 states, 1156 states have (on average 1.240484429065744) internal successors, (1434), 1158 states have internal predecessors, (1434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:43:11,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1159 states to 1159 states and 1434 transitions. [2021-11-21 01:43:11,282 INFO L78 Accepts]: Start accepts. Automaton has 1159 states and 1434 transitions. Word has length 54 [2021-11-21 01:43:11,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:43:11,283 INFO L470 AbstractCegarLoop]: Abstraction has 1159 states and 1434 transitions. [2021-11-21 01:43:11,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 5.05) internal successors, (101), 21 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:43:11,283 INFO L276 IsEmpty]: Start isEmpty. Operand 1159 states and 1434 transitions. [2021-11-21 01:43:11,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-21 01:43:11,285 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:43:11,286 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:43:11,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2021-11-21 01:43:11,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (74)] Forceful destruction successful, exit code 0 [2021-11-21 01:43:11,720 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (73)] Ended with exit code 0 [2021-11-21 01:43:11,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:43:11,912 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-21 01:43:11,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:43:11,912 INFO L85 PathProgramCache]: Analyzing trace with hash -933671349, now seen corresponding path program 2 times [2021-11-21 01:43:11,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:43:11,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [495289052] [2021-11-21 01:43:11,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 01:43:11,913 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:43:11,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:43:11,914 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:43:11,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (76)] Waiting until timeout for monitored process [2021-11-21 01:43:12,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 01:43:12,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:43:12,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-21 01:43:12,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:43:12,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 12 [2021-11-21 01:43:15,068 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 27 proven. 51 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-21 01:43:15,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:43:17,680 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 24 proven. 54 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-21 01:43:17,680 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:43:17,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [495289052] [2021-11-21 01:43:17,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [495289052] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:43:17,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1096775026] [2021-11-21 01:43:17,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 01:43:17,681 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:43:17,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:43:17,682 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:43:17,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (77)] Waiting until timeout for monitored process [2021-11-21 01:43:17,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 01:43:17,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:43:17,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-21 01:43:17,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:43:19,737 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 28 proven. 52 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-21 01:43:19,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:43:23,646 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 28 proven. 52 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-21 01:43:23,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1096775026] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:43:23,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822306876] [2021-11-21 01:43:23,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 01:43:23,647 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:43:23,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:43:23,648 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:43:23,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-11-21 01:43:23,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 01:43:23,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:43:23,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-21 01:43:23,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:43:23,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 12 [2021-11-21 01:43:26,737 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 16 proven. 28 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-21 01:43:26,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:43:30,153 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 8 proven. 36 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-21 01:43:30,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822306876] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:43:30,153 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:43:30,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 16, 15, 11, 10] total 61 [2021-11-21 01:43:30,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624698244] [2021-11-21 01:43:30,154 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:43:30,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-11-21 01:43:30,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:43:30,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-11-21 01:43:30,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=3282, Unknown=0, NotChecked=0, Total=3660 [2021-11-21 01:43:30,156 INFO L87 Difference]: Start difference. First operand 1159 states and 1434 transitions. Second operand has 61 states, 61 states have (on average 4.147540983606557) internal successors, (253), 61 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:43:44,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:43:44,222 INFO L93 Difference]: Finished difference Result 1435 states and 1770 transitions. [2021-11-21 01:43:44,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-11-21 01:43:44,222 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 4.147540983606557) internal successors, (253), 61 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-21 01:43:44,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:43:44,228 INFO L225 Difference]: With dead ends: 1435 [2021-11-21 01:43:44,228 INFO L226 Difference]: Without dead ends: 1435 [2021-11-21 01:43:44,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 327 SyntacticMatches, 10 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3189 ImplicationChecksByTransitivity, 25.7s TimeCoverageRelationStatistics Valid=1245, Invalid=9261, Unknown=0, NotChecked=0, Total=10506 [2021-11-21 01:43:44,230 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 123 mSDsluCounter, 626 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 651 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:43:44,230 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 651 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 81 Unchecked, 0.2s Time] [2021-11-21 01:43:44,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1435 states. [2021-11-21 01:43:44,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1435 to 1216. [2021-11-21 01:43:44,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1216 states, 1213 states have (on average 1.2291838417147567) internal successors, (1491), 1215 states have internal predecessors, (1491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:43:44,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1216 states to 1216 states and 1491 transitions. [2021-11-21 01:43:44,277 INFO L78 Accepts]: Start accepts. Automaton has 1216 states and 1491 transitions. Word has length 58 [2021-11-21 01:43:44,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:43:44,277 INFO L470 AbstractCegarLoop]: Abstraction has 1216 states and 1491 transitions. [2021-11-21 01:43:44,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 4.147540983606557) internal successors, (253), 61 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:43:44,278 INFO L276 IsEmpty]: Start isEmpty. Operand 1216 states and 1491 transitions. [2021-11-21 01:43:44,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-21 01:43:44,280 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:43:44,280 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:43:44,321 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2021-11-21 01:43:44,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (77)] Forceful destruction successful, exit code 0 [2021-11-21 01:43:44,706 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (76)] Ended with exit code 0 [2021-11-21 01:43:44,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:43:44,896 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-21 01:43:44,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:43:44,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1318339206, now seen corresponding path program 4 times [2021-11-21 01:43:44,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:43:44,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [10759626] [2021-11-21 01:43:44,897 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 01:43:44,897 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:43:44,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:43:44,898 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:43:44,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (79)] Waiting until timeout for monitored process [2021-11-21 01:43:45,062 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 01:43:45,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:43:45,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-21 01:43:45,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:43:45,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 12 [2021-11-21 01:43:46,516 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 29 proven. 53 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-21 01:43:46,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:43:49,161 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 24 proven. 58 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-21 01:43:49,161 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:43:49,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [10759626] [2021-11-21 01:43:49,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [10759626] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:43:49,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2136681837] [2021-11-21 01:43:49,162 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 01:43:49,162 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:43:49,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:43:49,167 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:43:49,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (80)] Waiting until timeout for monitored process [2021-11-21 01:43:49,366 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 01:43:49,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:43:49,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-21 01:43:49,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:43:51,168 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 30 proven. 52 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-21 01:43:51,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:43:54,829 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 30 proven. 52 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-21 01:43:54,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2136681837] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:43:54,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311601229] [2021-11-21 01:43:54,830 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 01:43:54,830 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:43:54,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:43:54,832 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:43:54,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-11-21 01:43:54,927 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 01:43:54,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:43:54,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-21 01:43:54,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:43:57,146 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 23 proven. 23 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-21 01:43:57,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:44:01,475 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 32 proven. 14 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-21 01:44:01,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311601229] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:44:01,476 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:44:01,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 16, 15, 13, 11] total 66 [2021-11-21 01:44:01,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575611888] [2021-11-21 01:44:01,476 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:44:01,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-11-21 01:44:01,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:44:01,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-11-21 01:44:01,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=3920, Unknown=0, NotChecked=0, Total=4290 [2021-11-21 01:44:01,478 INFO L87 Difference]: Start difference. First operand 1216 states and 1491 transitions. Second operand has 66 states, 66 states have (on average 3.9393939393939394) internal successors, (260), 66 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:44:49,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:44:49,371 INFO L93 Difference]: Finished difference Result 1738 states and 2073 transitions. [2021-11-21 01:44:49,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2021-11-21 01:44:49,371 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 3.9393939393939394) internal successors, (260), 66 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-21 01:44:49,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:44:49,378 INFO L225 Difference]: With dead ends: 1738 [2021-11-21 01:44:49,378 INFO L226 Difference]: Without dead ends: 1632 [2021-11-21 01:44:49,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 498 GetRequests, 317 SyntacticMatches, 9 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9688 ImplicationChecksByTransitivity, 52.6s TimeCoverageRelationStatistics Valid=2533, Invalid=27569, Unknown=0, NotChecked=0, Total=30102 [2021-11-21 01:44:49,381 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 499 mSDsluCounter, 816 mSDsCounter, 0 mSdLazyCounter, 650 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 499 SdHoareTripleChecker+Valid, 852 SdHoareTripleChecker+Invalid, 1495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 732 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:44:49,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [499 Valid, 852 Invalid, 1495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 650 Invalid, 0 Unknown, 732 Unchecked, 6.4s Time] [2021-11-21 01:44:49,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1632 states. [2021-11-21 01:44:49,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1632 to 1364. [2021-11-21 01:44:49,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1364 states, 1361 states have (on average 1.2027920646583394) internal successors, (1637), 1363 states have internal predecessors, (1637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:44:49,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1364 states to 1364 states and 1637 transitions. [2021-11-21 01:44:49,419 INFO L78 Accepts]: Start accepts. Automaton has 1364 states and 1637 transitions. Word has length 59 [2021-11-21 01:44:49,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:44:49,419 INFO L470 AbstractCegarLoop]: Abstraction has 1364 states and 1637 transitions. [2021-11-21 01:44:49,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 3.9393939393939394) internal successors, (260), 66 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:44:49,420 INFO L276 IsEmpty]: Start isEmpty. Operand 1364 states and 1637 transitions. [2021-11-21 01:44:49,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-21 01:44:49,422 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:44:49,423 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:44:49,439 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (79)] Forceful destruction successful, exit code 0 [2021-11-21 01:44:49,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (80)] Forceful destruction successful, exit code 0 [2021-11-21 01:44:49,866 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2021-11-21 01:44:50,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:44:50,039 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-21 01:44:50,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:44:50,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1081240719, now seen corresponding path program 5 times [2021-11-21 01:44:50,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:44:50,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [260035800] [2021-11-21 01:44:50,041 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-21 01:44:50,041 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:44:50,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:44:50,042 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:44:50,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (82)] Waiting until timeout for monitored process [2021-11-21 01:44:50,562 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-11-21 01:44:50,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:44:50,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-21 01:44:50,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:44:50,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 12 [2021-11-21 01:44:53,316 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 21 proven. 51 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-21 01:44:53,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:44:57,424 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 11 proven. 61 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-21 01:44:57,424 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:44:57,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [260035800] [2021-11-21 01:44:57,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [260035800] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:44:57,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1175281889] [2021-11-21 01:44:57,424 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-21 01:44:57,425 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:44:57,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:44:57,425 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:44:57,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df49f64-872f-49dc-b16e-485d04de0873/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (83)] Waiting until timeout for monitored process