./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memcleanup.prp --file ../../sv-benchmarks/c/verifythis/tree_max.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (memcleanup) Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27cb0912-8a7e-4000-a49c-e20c6e2e4fe3/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27cb0912-8a7e-4000-a49c-e20c6e2e4fe3/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_27cb0912-8a7e-4000-a49c-e20c6e2e4fe3/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27cb0912-8a7e-4000-a49c-e20c6e2e4fe3/bin/utaipan-TEXQjIfE4P/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/verifythis/tree_max.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27cb0912-8a7e-4000-a49c-e20c6e2e4fe3/bin/utaipan-TEXQjIfE4P/config/svcomp-MemCleanup-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27cb0912-8a7e-4000-a49c-e20c6e2e4fe3/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-memcleanup) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e98a60ea9ee0c00575c08606ce8b95d0660c5b235c5932147dfee4b13512f57c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 22:49:10,071 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 22:49:10,073 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 22:49:10,108 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 22:49:10,108 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 22:49:10,113 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 22:49:10,116 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 22:49:10,120 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 22:49:10,122 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 22:49:10,128 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 22:49:10,129 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 22:49:10,131 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 22:49:10,131 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 22:49:10,134 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 22:49:10,136 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 22:49:10,138 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 22:49:10,140 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 22:49:10,141 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 22:49:10,145 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 22:49:10,152 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 22:49:10,154 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 22:49:10,155 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 22:49:10,158 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 22:49:10,159 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 22:49:10,166 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 22:49:10,166 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 22:49:10,166 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 22:49:10,168 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 22:49:10,169 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 22:49:10,171 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 22:49:10,172 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 22:49:10,174 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 22:49:10,176 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 22:49:10,177 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 22:49:10,179 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 22:49:10,179 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 22:49:10,180 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 22:49:10,181 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 22:49:10,181 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 22:49:10,182 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 22:49:10,183 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 22:49:10,185 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27cb0912-8a7e-4000-a49c-e20c6e2e4fe3/bin/utaipan-TEXQjIfE4P/config/svcomp-MemCleanup-32bit-Taipan_Default.epf [2021-11-20 22:49:10,228 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 22:49:10,228 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 22:49:10,229 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 22:49:10,229 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 22:49:10,229 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 22:49:10,229 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 22:49:10,230 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 22:49:10,230 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 22:49:10,230 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 22:49:10,230 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-20 22:49:10,230 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 22:49:10,231 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 22:49:10,231 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-20 22:49:10,231 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-20 22:49:10,231 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 22:49:10,231 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-20 22:49:10,232 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-20 22:49:10,232 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-20 22:49:10,233 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 22:49:10,233 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 22:49:10,233 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 22:49:10,233 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 22:49:10,233 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-20 22:49:10,234 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 22:49:10,234 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 22:49:10,234 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 22:49:10,234 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-20 22:49:10,234 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-20 22:49:10,235 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 22:49:10,235 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-20 22:49:10,235 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 22:49:10,235 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 22:49:10,235 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 22:49:10,236 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 22:49:10,236 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 22:49:10,236 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 22:49:10,236 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 22:49:10,236 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-20 22:49:10,237 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 22:49:10,237 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 22:49:10,237 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 22:49:10,237 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_27cb0912-8a7e-4000-a49c-e20c6e2e4fe3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27cb0912-8a7e-4000-a49c-e20c6e2e4fe3/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e98a60ea9ee0c00575c08606ce8b95d0660c5b235c5932147dfee4b13512f57c [2021-11-20 22:49:10,498 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 22:49:10,519 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 22:49:10,522 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 22:49:10,523 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 22:49:10,524 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 22:49:10,525 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27cb0912-8a7e-4000-a49c-e20c6e2e4fe3/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/verifythis/tree_max.c [2021-11-20 22:49:10,613 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27cb0912-8a7e-4000-a49c-e20c6e2e4fe3/bin/utaipan-TEXQjIfE4P/data/7876e8dff/448868a821884bcdb1c6018171e52f02/FLAG69c4613cd [2021-11-20 22:49:11,146 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 22:49:11,147 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27cb0912-8a7e-4000-a49c-e20c6e2e4fe3/sv-benchmarks/c/verifythis/tree_max.c [2021-11-20 22:49:11,160 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27cb0912-8a7e-4000-a49c-e20c6e2e4fe3/bin/utaipan-TEXQjIfE4P/data/7876e8dff/448868a821884bcdb1c6018171e52f02/FLAG69c4613cd [2021-11-20 22:49:11,487 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27cb0912-8a7e-4000-a49c-e20c6e2e4fe3/bin/utaipan-TEXQjIfE4P/data/7876e8dff/448868a821884bcdb1c6018171e52f02 [2021-11-20 22:49:11,490 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 22:49:11,492 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 22:49:11,495 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 22:49:11,495 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 22:49:11,507 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 22:49:11,508 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:49:11" (1/1) ... [2021-11-20 22:49:11,509 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58b970d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:49:11, skipping insertion in model container [2021-11-20 22:49:11,510 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:49:11" (1/1) ... [2021-11-20 22:49:11,519 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 22:49:11,541 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 22:49:11,736 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27cb0912-8a7e-4000-a49c-e20c6e2e4fe3/sv-benchmarks/c/verifythis/tree_max.c[544,557] [2021-11-20 22:49:11,763 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 22:49:11,776 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-20 22:49:11,777 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@566a6b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:49:11, skipping insertion in model container [2021-11-20 22:49:11,777 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 22:49:11,777 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-20 22:49:11,780 INFO L158 Benchmark]: Toolchain (without parser) took 286.43ms. Allocated memory is still 115.3MB. Free memory was 83.6MB in the beginning and 93.3MB in the end (delta: -9.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-20 22:49:11,781 INFO L158 Benchmark]: CDTParser took 0.27ms. Allocated memory is still 81.8MB. Free memory was 37.3MB in the beginning and 37.3MB in the end (delta: 40.5kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 22:49:11,784 INFO L158 Benchmark]: CACSL2BoogieTranslator took 282.53ms. Allocated memory is still 115.3MB. Free memory was 83.4MB in the beginning and 93.3MB in the end (delta: -9.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-20 22:49:11,786 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27ms. Allocated memory is still 81.8MB. Free memory was 37.3MB in the beginning and 37.3MB in the end (delta: 40.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 282.53ms. Allocated memory is still 115.3MB. Free memory was 83.4MB in the beginning and 93.3MB in the end (delta: -9.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 27]: 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_27cb0912-8a7e-4000-a49c-e20c6e2e4fe3/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27cb0912-8a7e-4000-a49c-e20c6e2e4fe3/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_27cb0912-8a7e-4000-a49c-e20c6e2e4fe3/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27cb0912-8a7e-4000-a49c-e20c6e2e4fe3/bin/utaipan-TEXQjIfE4P/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/verifythis/tree_max.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27cb0912-8a7e-4000-a49c-e20c6e2e4fe3/bin/utaipan-TEXQjIfE4P/config/svcomp-MemCleanup-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27cb0912-8a7e-4000-a49c-e20c6e2e4fe3/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-memcleanup) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e98a60ea9ee0c00575c08606ce8b95d0660c5b235c5932147dfee4b13512f57c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 22:49:14,164 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 22:49:14,168 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 22:49:14,233 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 22:49:14,234 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 22:49:14,238 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 22:49:14,240 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 22:49:14,244 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 22:49:14,247 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 22:49:14,255 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 22:49:14,257 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 22:49:14,259 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 22:49:14,259 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 22:49:14,262 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 22:49:14,264 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 22:49:14,269 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 22:49:14,270 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 22:49:14,272 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 22:49:14,274 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 22:49:14,281 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 22:49:14,283 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 22:49:14,285 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 22:49:14,288 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 22:49:14,290 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 22:49:14,298 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 22:49:14,299 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 22:49:14,299 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 22:49:14,301 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 22:49:14,302 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 22:49:14,303 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 22:49:14,304 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 22:49:14,305 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 22:49:14,307 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 22:49:14,308 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 22:49:14,309 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 22:49:14,310 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 22:49:14,311 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 22:49:14,311 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 22:49:14,311 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 22:49:14,313 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 22:49:14,314 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 22:49:14,319 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27cb0912-8a7e-4000-a49c-e20c6e2e4fe3/bin/utaipan-TEXQjIfE4P/config/svcomp-MemCleanup-32bit-Taipan_Bitvector.epf [2021-11-20 22:49:14,361 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 22:49:14,361 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 22:49:14,362 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 22:49:14,362 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 22:49:14,363 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 22:49:14,364 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 22:49:14,364 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 22:49:14,364 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 22:49:14,365 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 22:49:14,365 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 22:49:14,366 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 22:49:14,367 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 22:49:14,368 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 22:49:14,369 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 22:49:14,369 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 22:49:14,369 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 22:49:14,370 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-20 22:49:14,370 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 22:49:14,370 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 22:49:14,370 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 22:49:14,371 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-20 22:49:14,371 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-20 22:49:14,371 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 22:49:14,372 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-20 22:49:14,372 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-20 22:49:14,372 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-20 22:49:14,372 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 22:49:14,373 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 22:49:14,373 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 22:49:14,373 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 22:49:14,374 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 22:49:14,374 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 22:49:14,375 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 22:49:14,375 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 22:49:14,375 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-20 22:49:14,376 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-20 22:49:14,376 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 22:49:14,376 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 22:49:14,377 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_27cb0912-8a7e-4000-a49c-e20c6e2e4fe3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27cb0912-8a7e-4000-a49c-e20c6e2e4fe3/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e98a60ea9ee0c00575c08606ce8b95d0660c5b235c5932147dfee4b13512f57c [2021-11-20 22:49:14,811 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 22:49:14,845 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 22:49:14,848 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 22:49:14,849 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 22:49:14,850 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 22:49:14,851 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27cb0912-8a7e-4000-a49c-e20c6e2e4fe3/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/verifythis/tree_max.c [2021-11-20 22:49:14,939 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27cb0912-8a7e-4000-a49c-e20c6e2e4fe3/bin/utaipan-TEXQjIfE4P/data/fbd72d90c/e4c35cbe29644db4a3e956eca51635a1/FLAG181fc585f [2021-11-20 22:49:15,487 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 22:49:15,488 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27cb0912-8a7e-4000-a49c-e20c6e2e4fe3/sv-benchmarks/c/verifythis/tree_max.c [2021-11-20 22:49:15,495 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27cb0912-8a7e-4000-a49c-e20c6e2e4fe3/bin/utaipan-TEXQjIfE4P/data/fbd72d90c/e4c35cbe29644db4a3e956eca51635a1/FLAG181fc585f [2021-11-20 22:49:15,939 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27cb0912-8a7e-4000-a49c-e20c6e2e4fe3/bin/utaipan-TEXQjIfE4P/data/fbd72d90c/e4c35cbe29644db4a3e956eca51635a1 [2021-11-20 22:49:15,941 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 22:49:15,943 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 22:49:15,947 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 22:49:15,947 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 22:49:15,951 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 22:49:15,951 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:49:15" (1/1) ... [2021-11-20 22:49:15,952 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43f9aa81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:49:15, skipping insertion in model container [2021-11-20 22:49:15,952 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:49:15" (1/1) ... [2021-11-20 22:49:15,971 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 22:49:15,985 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 22:49:16,118 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27cb0912-8a7e-4000-a49c-e20c6e2e4fe3/sv-benchmarks/c/verifythis/tree_max.c[544,557] [2021-11-20 22:49:16,135 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 22:49:16,162 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-20 22:49:16,174 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 22:49:16,191 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27cb0912-8a7e-4000-a49c-e20c6e2e4fe3/sv-benchmarks/c/verifythis/tree_max.c[544,557] [2021-11-20 22:49:16,201 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 22:49:16,229 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 22:49:16,248 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27cb0912-8a7e-4000-a49c-e20c6e2e4fe3/sv-benchmarks/c/verifythis/tree_max.c[544,557] [2021-11-20 22:49:16,257 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 22:49:16,275 INFO L208 MainTranslator]: Completed translation [2021-11-20 22:49:16,275 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:49:16 WrapperNode [2021-11-20 22:49:16,275 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 22:49:16,277 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 22:49:16,277 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 22:49:16,277 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 22:49:16,284 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:49:16" (1/1) ... [2021-11-20 22:49:16,295 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:49:16" (1/1) ... [2021-11-20 22:49:16,314 INFO L137 Inliner]: procedures = 26, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 37 [2021-11-20 22:49:16,315 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 22:49:16,315 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 22:49:16,316 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 22:49:16,316 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 22:49:16,324 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:49:16" (1/1) ... [2021-11-20 22:49:16,325 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:49:16" (1/1) ... [2021-11-20 22:49:16,329 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:49:16" (1/1) ... [2021-11-20 22:49:16,329 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:49:16" (1/1) ... [2021-11-20 22:49:16,339 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:49:16" (1/1) ... [2021-11-20 22:49:16,341 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:49:16" (1/1) ... [2021-11-20 22:49:16,343 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:49:16" (1/1) ... [2021-11-20 22:49:16,347 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 22:49:16,348 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 22:49:16,348 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 22:49:16,348 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 22:49:16,349 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:49:16" (1/1) ... [2021-11-20 22:49:16,356 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 22:49:16,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27cb0912-8a7e-4000-a49c-e20c6e2e4fe3/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:49:16,381 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27cb0912-8a7e-4000-a49c-e20c6e2e4fe3/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 22:49:16,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27cb0912-8a7e-4000-a49c-e20c6e2e4fe3/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 22:49:16,423 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 22:49:16,423 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-20 22:49:16,424 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 22:49:16,424 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-20 22:49:16,424 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 22:49:16,424 INFO L130 BoogieDeclarations]: Found specification of procedure max [2021-11-20 22:49:16,424 INFO L138 BoogieDeclarations]: Found implementation of procedure max [2021-11-20 22:49:16,425 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2021-11-20 22:49:16,425 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2021-11-20 22:49:16,425 INFO L130 BoogieDeclarations]: Found specification of procedure check [2021-11-20 22:49:16,425 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2021-11-20 22:49:16,425 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 22:49:16,426 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 22:49:16,426 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 22:49:16,426 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-20 22:49:16,560 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 22:49:16,562 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 22:49:16,971 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 22:49:16,978 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 22:49:16,978 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-20 22:49:16,980 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:49:16 BoogieIcfgContainer [2021-11-20 22:49:16,980 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 22:49:16,992 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 22:49:16,992 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 22:49:16,995 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 22:49:16,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 10:49:15" (1/3) ... [2021-11-20 22:49:16,996 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7031526f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:49:16, skipping insertion in model container [2021-11-20 22:49:16,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:49:16" (2/3) ... [2021-11-20 22:49:16,996 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7031526f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:49:16, skipping insertion in model container [2021-11-20 22:49:16,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:49:16" (3/3) ... [2021-11-20 22:49:16,998 INFO L111 eAbstractionObserver]: Analyzing ICFG tree_max.c [2021-11-20 22:49:17,003 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 22:49:17,003 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2021-11-20 22:49:17,067 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 22:49:17,077 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 22:49:17,077 INFO L340 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2021-11-20 22:49:17,102 INFO L276 IsEmpty]: Start isEmpty. Operand has 72 states, 39 states have (on average 1.6923076923076923) internal successors, (66), 59 states have internal predecessors, (66), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-20 22:49:17,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-20 22:49:17,118 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:49:17,118 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-20 22:49:17,119 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting nondet_treeErr0REQUIRES_VIOLATION === [maxErr0REQUIRES_VIOLATION, maxErr1REQUIRES_VIOLATION, maxErr2REQUIRES_VIOLATION, maxErr3REQUIRES_VIOLATION, maxErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 22:49:17,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:49:17,125 INFO L85 PathProgramCache]: Analyzing trace with hash 73597257, now seen corresponding path program 1 times [2021-11-20 22:49:17,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:49:17,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1584548561] [2021-11-20 22:49:17,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:49:17,138 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:49:17,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27cb0912-8a7e-4000-a49c-e20c6e2e4fe3/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:49:17,143 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27cb0912-8a7e-4000-a49c-e20c6e2e4fe3/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:49:17,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27cb0912-8a7e-4000-a49c-e20c6e2e4fe3/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-20 22:49:17,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:49:17,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 22:49:17,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:49:17,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 22:49:17,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:49:17,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:49:17,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:49:17,370 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:49:17,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1584548561] [2021-11-20 22:49:17,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1584548561] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 22:49:17,371 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:49:17,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-20 22:49:17,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629234775] [2021-11-20 22:49:17,374 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 22:49:17,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 22:49:17,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:49:17,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 22:49:17,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 22:49:17,426 INFO L87 Difference]: Start difference. First operand has 72 states, 39 states have (on average 1.6923076923076923) internal successors, (66), 59 states have internal predecessors, (66), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:49:17,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:49:17,560 INFO L93 Difference]: Finished difference Result 73 states and 86 transitions. [2021-11-20 22:49:17,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 22:49:17,563 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-20 22:49:17,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:49:17,579 INFO L225 Difference]: With dead ends: 73 [2021-11-20 22:49:17,579 INFO L226 Difference]: Without dead ends: 71 [2021-11-20 22:49:17,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 22:49:17,585 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 6 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 22:49:17,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 133 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 22:49:17,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-11-20 22:49:17,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2021-11-20 22:49:17,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 38 states have (on average 1.631578947368421) internal successors, (62), 56 states have internal predecessors, (62), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-20 22:49:17,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 80 transitions. [2021-11-20 22:49:17,631 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 80 transitions. Word has length 5 [2021-11-20 22:49:17,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:49:17,632 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 80 transitions. [2021-11-20 22:49:17,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:49:17,633 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 80 transitions. [2021-11-20 22:49:17,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-20 22:49:17,637 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:49:17,638 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-20 22:49:17,662 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27cb0912-8a7e-4000-a49c-e20c6e2e4fe3/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-20 22:49:17,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27cb0912-8a7e-4000-a49c-e20c6e2e4fe3/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 22:49:17,848 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting nondet_treeErr1REQUIRES_VIOLATION === [maxErr0REQUIRES_VIOLATION, maxErr1REQUIRES_VIOLATION, maxErr2REQUIRES_VIOLATION, maxErr3REQUIRES_VIOLATION, maxErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 22:49:17,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:49:17,849 INFO L85 PathProgramCache]: Analyzing trace with hash 73597258, now seen corresponding path program 1 times [2021-11-20 22:49:17,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:49:17,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1060383019] [2021-11-20 22:49:17,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:49:17,850 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:49:17,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27cb0912-8a7e-4000-a49c-e20c6e2e4fe3/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:49:17,851 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27cb0912-8a7e-4000-a49c-e20c6e2e4fe3/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:49:17,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27cb0912-8a7e-4000-a49c-e20c6e2e4fe3/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-20 22:49:17,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:49:17,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 22:49:17,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:49:17,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 22:49:17,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:49:17,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:49:18,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:49:18,067 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:49:18,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1060383019] [2021-11-20 22:49:18,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1060383019] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 22:49:18,068 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:49:18,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-20 22:49:18,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575782369] [2021-11-20 22:49:18,069 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 22:49:18,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:49:18,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:49:18,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:49:18,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:49:18,071 INFO L87 Difference]: Start difference. First operand 69 states and 80 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:49:18,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:49:18,289 INFO L93 Difference]: Finished difference Result 68 states and 79 transitions. [2021-11-20 22:49:18,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 22:49:18,292 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-20 22:49:18,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:49:18,294 INFO L225 Difference]: With dead ends: 68 [2021-11-20 22:49:18,294 INFO L226 Difference]: Without dead ends: 68 [2021-11-20 22:49:18,294 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:49:18,296 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 4 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 22:49:18,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 132 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 22:49:18,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-11-20 22:49:18,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2021-11-20 22:49:18,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 38 states have (on average 1.605263157894737) internal successors, (61), 55 states have internal predecessors, (61), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-20 22:49:18,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 79 transitions. [2021-11-20 22:49:18,322 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 79 transitions. Word has length 5 [2021-11-20 22:49:18,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:49:18,322 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 79 transitions. [2021-11-20 22:49:18,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:49:18,323 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 79 transitions. [2021-11-20 22:49:18,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-20 22:49:18,324 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:49:18,324 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:49:18,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27cb0912-8a7e-4000-a49c-e20c6e2e4fe3/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-20 22:49:18,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27cb0912-8a7e-4000-a49c-e20c6e2e4fe3/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 22:49:18,535 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting maxErr0REQUIRES_VIOLATION === [maxErr0REQUIRES_VIOLATION, maxErr1REQUIRES_VIOLATION, maxErr2REQUIRES_VIOLATION, maxErr3REQUIRES_VIOLATION, maxErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 22:49:18,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:49:18,536 INFO L85 PathProgramCache]: Analyzing trace with hash -345289291, now seen corresponding path program 1 times [2021-11-20 22:49:18,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:49:18,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1998776582] [2021-11-20 22:49:18,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:49:18,537 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:49:18,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27cb0912-8a7e-4000-a49c-e20c6e2e4fe3/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:49:18,538 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27cb0912-8a7e-4000-a49c-e20c6e2e4fe3/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:49:18,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27cb0912-8a7e-4000-a49c-e20c6e2e4fe3/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-20 22:49:18,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:49:18,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-20 22:49:18,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:49:18,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:49:18,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:49:18,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:49:18,918 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:49:18,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1998776582] [2021-11-20 22:49:18,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1998776582] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 22:49:18,922 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:49:18,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 7 [2021-11-20 22:49:18,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873703038] [2021-11-20 22:49:18,923 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 22:49:18,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 22:49:18,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:49:18,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 22:49:18,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 22:49:18,927 INFO L87 Difference]: Start difference. First operand 68 states and 79 transitions. Second operand has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 22:49:19,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:49:19,060 INFO L93 Difference]: Finished difference Result 83 states and 98 transitions. [2021-11-20 22:49:19,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 22:49:19,061 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-11-20 22:49:19,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:49:19,063 INFO L225 Difference]: With dead ends: 83 [2021-11-20 22:49:19,063 INFO L226 Difference]: Without dead ends: 83 [2021-11-20 22:49:19,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-20 22:49:19,065 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 11 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 22:49:19,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 444 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 22:49:19,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-11-20 22:49:19,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 76. [2021-11-20 22:49:19,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 43 states have (on average 1.5348837209302326) internal successors, (66), 61 states have internal predecessors, (66), 10 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (13), 10 states have call predecessors, (13), 10 states have call successors, (13) [2021-11-20 22:49:19,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 89 transitions. [2021-11-20 22:49:19,078 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 89 transitions. Word has length 11 [2021-11-20 22:49:19,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:49:19,078 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 89 transitions. [2021-11-20 22:49:19,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 22:49:19,079 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 89 transitions. [2021-11-20 22:49:19,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-20 22:49:19,079 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:49:19,080 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:49:19,093 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27cb0912-8a7e-4000-a49c-e20c6e2e4fe3/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-20 22:49:19,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27cb0912-8a7e-4000-a49c-e20c6e2e4fe3/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 22:49:19,291 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting nondet_treeErr2REQUIRES_VIOLATION === [maxErr0REQUIRES_VIOLATION, maxErr1REQUIRES_VIOLATION, maxErr2REQUIRES_VIOLATION, maxErr3REQUIRES_VIOLATION, maxErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 22:49:19,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:49:19,292 INFO L85 PathProgramCache]: Analyzing trace with hash -159104294, now seen corresponding path program 1 times [2021-11-20 22:49:19,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:49:19,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1623099505] [2021-11-20 22:49:19,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:49:19,293 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:49:19,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27cb0912-8a7e-4000-a49c-e20c6e2e4fe3/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:49:19,296 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27cb0912-8a7e-4000-a49c-e20c6e2e4fe3/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:49:19,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27cb0912-8a7e-4000-a49c-e20c6e2e4fe3/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-20 22:49:19,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:49:19,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 22:49:19,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:49:19,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 22:49:19,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:49:19,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:49:19,546 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:49:19,549 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:49:19,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1623099505] [2021-11-20 22:49:19,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1623099505] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 22:49:19,555 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:49:19,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-20 22:49:19,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865029512] [2021-11-20 22:49:19,556 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 22:49:19,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 22:49:19,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:49:19,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 22:49:19,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:49:19,558 INFO L87 Difference]: Start difference. First operand 76 states and 89 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 22:49:19,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:49:19,658 INFO L93 Difference]: Finished difference Result 81 states and 94 transitions. [2021-11-20 22:49:19,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:49:19,659 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 11 [2021-11-20 22:49:19,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:49:19,660 INFO L225 Difference]: With dead ends: 81 [2021-11-20 22:49:19,660 INFO L226 Difference]: Without dead ends: 81 [2021-11-20 22:49:19,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:49:19,662 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 5 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 22:49:19,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 149 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 67 Unchecked, 0.1s Time] [2021-11-20 22:49:19,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-11-20 22:49:19,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2021-11-20 22:49:19,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 46 states have (on average 1.5434782608695652) internal successors, (71), 63 states have internal predecessors, (71), 10 states have call successors, (10), 5 states have call predecessors, (10), 6 states have return successors, (13), 11 states have call predecessors, (13), 10 states have call successors, (13) [2021-11-20 22:49:19,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 94 transitions. [2021-11-20 22:49:19,672 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 94 transitions. Word has length 11 [2021-11-20 22:49:19,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:49:19,672 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 94 transitions. [2021-11-20 22:49:19,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 22:49:19,673 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 94 transitions. [2021-11-20 22:49:19,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-20 22:49:19,673 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:49:19,674 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:49:19,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27cb0912-8a7e-4000-a49c-e20c6e2e4fe3/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-20 22:49:19,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27cb0912-8a7e-4000-a49c-e20c6e2e4fe3/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 22:49:19,883 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting nondet_treeErr3REQUIRES_VIOLATION === [maxErr0REQUIRES_VIOLATION, maxErr1REQUIRES_VIOLATION, maxErr2REQUIRES_VIOLATION, maxErr3REQUIRES_VIOLATION, maxErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 22:49:19,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:49:19,884 INFO L85 PathProgramCache]: Analyzing trace with hash -159104293, now seen corresponding path program 1 times [2021-11-20 22:49:19,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:49:19,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [126249973] [2021-11-20 22:49:19,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:49:19,884 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:49:19,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27cb0912-8a7e-4000-a49c-e20c6e2e4fe3/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:49:19,886 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27cb0912-8a7e-4000-a49c-e20c6e2e4fe3/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:49:19,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27cb0912-8a7e-4000-a49c-e20c6e2e4fe3/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-20 22:49:19,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:49:19,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 22:49:19,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:49:19,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 22:49:20,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:49:20,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:49:20,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:49:20,305 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:49:20,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [126249973] [2021-11-20 22:49:20,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [126249973] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 22:49:20,305 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:49:20,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-20 22:49:20,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504725350] [2021-11-20 22:49:20,306 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 22:49:20,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 22:49:20,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:49:20,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 22:49:20,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 22:49:20,307 INFO L87 Difference]: Start difference. First operand 80 states and 94 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 22:49:20,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:49:20,543 INFO L93 Difference]: Finished difference Result 82 states and 97 transitions. [2021-11-20 22:49:20,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 22:49:20,544 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 11 [2021-11-20 22:49:20,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:49:20,546 INFO L225 Difference]: With dead ends: 82 [2021-11-20 22:49:20,546 INFO L226 Difference]: Without dead ends: 82 [2021-11-20 22:49:20,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 22:49:20,547 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 3 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 22:49:20,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 208 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 53 Invalid, 0 Unknown, 60 Unchecked, 0.2s Time] [2021-11-20 22:49:20,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-11-20 22:49:20,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 80. [2021-11-20 22:49:20,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 46 states have (on average 1.5217391304347827) internal successors, (70), 63 states have internal predecessors, (70), 10 states have call successors, (10), 5 states have call predecessors, (10), 6 states have return successors, (13), 11 states have call predecessors, (13), 10 states have call successors, (13) [2021-11-20 22:49:20,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 93 transitions. [2021-11-20 22:49:20,566 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 93 transitions. Word has length 11 [2021-11-20 22:49:20,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:49:20,566 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 93 transitions. [2021-11-20 22:49:20,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 22:49:20,567 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 93 transitions. [2021-11-20 22:49:20,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-20 22:49:20,568 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:49:20,568 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:49:20,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27cb0912-8a7e-4000-a49c-e20c6e2e4fe3/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-20 22:49:20,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27cb0912-8a7e-4000-a49c-e20c6e2e4fe3/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 22:49:20,773 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting checkErr0REQUIRES_VIOLATION === [maxErr0REQUIRES_VIOLATION, maxErr1REQUIRES_VIOLATION, maxErr2REQUIRES_VIOLATION, maxErr3REQUIRES_VIOLATION, maxErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 22:49:20,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:49:20,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1041946460, now seen corresponding path program 1 times [2021-11-20 22:49:20,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:49:20,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [392467263] [2021-11-20 22:49:20,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:49:20,775 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:49:20,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27cb0912-8a7e-4000-a49c-e20c6e2e4fe3/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:49:20,776 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27cb0912-8a7e-4000-a49c-e20c6e2e4fe3/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:49:20,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27cb0912-8a7e-4000-a49c-e20c6e2e4fe3/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-20 22:49:20,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:49:20,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-20 22:49:20,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:49:20,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:49:20,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:49:21,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:49:21,058 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:49:21,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [392467263] [2021-11-20 22:49:21,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [392467263] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 22:49:21,058 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:49:21,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 7 [2021-11-20 22:49:21,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628002147] [2021-11-20 22:49:21,059 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 22:49:21,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 22:49:21,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:49:21,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 22:49:21,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 22:49:21,061 INFO L87 Difference]: Start difference. First operand 80 states and 93 transitions. Second operand has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 22:49:21,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:49:21,158 INFO L93 Difference]: Finished difference Result 91 states and 105 transitions. [2021-11-20 22:49:21,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 22:49:21,159 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2021-11-20 22:49:21,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:49:21,160 INFO L225 Difference]: With dead ends: 91 [2021-11-20 22:49:21,160 INFO L226 Difference]: Without dead ends: 91 [2021-11-20 22:49:21,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-20 22:49:21,161 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 10 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 22:49:21,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 444 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 22:49:21,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-11-20 22:49:21,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 86. [2021-11-20 22:49:21,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 50 states have (on average 1.48) internal successors, (74), 67 states have internal predecessors, (74), 11 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (14), 12 states have call predecessors, (14), 11 states have call successors, (14) [2021-11-20 22:49:21,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 99 transitions. [2021-11-20 22:49:21,172 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 99 transitions. Word has length 17 [2021-11-20 22:49:21,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:49:21,172 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 99 transitions. [2021-11-20 22:49:21,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 22:49:21,172 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 99 transitions. [2021-11-20 22:49:21,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-20 22:49:21,173 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:49:21,174 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:49:21,194 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27cb0912-8a7e-4000-a49c-e20c6e2e4fe3/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-20 22:49:21,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27cb0912-8a7e-4000-a49c-e20c6e2e4fe3/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 22:49:21,385 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting nondet_treeErr4REQUIRES_VIOLATION === [maxErr0REQUIRES_VIOLATION, maxErr1REQUIRES_VIOLATION, maxErr2REQUIRES_VIOLATION, maxErr3REQUIRES_VIOLATION, maxErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 22:49:21,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:49:21,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1725611983, now seen corresponding path program 1 times [2021-11-20 22:49:21,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:49:21,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [939063540] [2021-11-20 22:49:21,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:49:21,386 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:49:21,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27cb0912-8a7e-4000-a49c-e20c6e2e4fe3/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:49:21,387 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27cb0912-8a7e-4000-a49c-e20c6e2e4fe3/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:49:21,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27cb0912-8a7e-4000-a49c-e20c6e2e4fe3/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-20 22:49:21,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:49:21,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 22:49:21,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:49:21,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 22:49:21,544 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 22:49:21,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:49:21,705 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 22:49:21,710 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:49:21,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [939063540] [2021-11-20 22:49:21,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [939063540] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 22:49:21,711 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:49:21,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-20 22:49:21,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797225552] [2021-11-20 22:49:21,711 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 22:49:21,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 22:49:21,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:49:21,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 22:49:21,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:49:21,713 INFO L87 Difference]: Start difference. First operand 86 states and 99 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-20 22:49:21,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:49:21,821 INFO L93 Difference]: Finished difference Result 91 states and 104 transitions. [2021-11-20 22:49:21,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:49:21,822 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 21 [2021-11-20 22:49:21,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:49:21,823 INFO L225 Difference]: With dead ends: 91 [2021-11-20 22:49:21,823 INFO L226 Difference]: Without dead ends: 91 [2021-11-20 22:49:21,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:49:21,824 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 4 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 22:49:21,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 145 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 66 Unchecked, 0.1s Time] [2021-11-20 22:49:21,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-11-20 22:49:21,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2021-11-20 22:49:21,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 53 states have (on average 1.490566037735849) internal successors, (79), 69 states have internal predecessors, (79), 11 states have call successors, (11), 7 states have call predecessors, (11), 8 states have return successors, (14), 13 states have call predecessors, (14), 11 states have call successors, (14) [2021-11-20 22:49:21,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 104 transitions. [2021-11-20 22:49:21,833 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 104 transitions. Word has length 21 [2021-11-20 22:49:21,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:49:21,834 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 104 transitions. [2021-11-20 22:49:21,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-20 22:49:21,834 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 104 transitions. [2021-11-20 22:49:21,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-20 22:49:21,835 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:49:21,835 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:49:21,850 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27cb0912-8a7e-4000-a49c-e20c6e2e4fe3/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-20 22:49:22,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27cb0912-8a7e-4000-a49c-e20c6e2e4fe3/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 22:49:22,047 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting nondet_treeErr5REQUIRES_VIOLATION === [maxErr0REQUIRES_VIOLATION, maxErr1REQUIRES_VIOLATION, maxErr2REQUIRES_VIOLATION, maxErr3REQUIRES_VIOLATION, maxErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 22:49:22,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:49:22,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1725611984, now seen corresponding path program 1 times [2021-11-20 22:49:22,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:49:22,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [49102077] [2021-11-20 22:49:22,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:49:22,048 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:49:22,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27cb0912-8a7e-4000-a49c-e20c6e2e4fe3/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:49:22,049 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27cb0912-8a7e-4000-a49c-e20c6e2e4fe3/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:49:22,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27cb0912-8a7e-4000-a49c-e20c6e2e4fe3/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-20 22:49:22,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:49:22,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 22:49:22,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:49:22,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 22:49:22,260 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 22:49:22,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:49:22,824 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 22:49:22,824 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:49:22,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [49102077] [2021-11-20 22:49:22,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [49102077] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 22:49:22,824 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:49:22,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-20 22:49:22,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178171267] [2021-11-20 22:49:22,825 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 22:49:22,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 22:49:22,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:49:22,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 22:49:22,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 22:49:22,826 INFO L87 Difference]: Start difference. First operand 90 states and 104 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 22:49:23,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:49:23,308 INFO L93 Difference]: Finished difference Result 96 states and 115 transitions. [2021-11-20 22:49:23,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 22:49:23,309 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 21 [2021-11-20 22:49:23,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:49:23,310 INFO L225 Difference]: With dead ends: 96 [2021-11-20 22:49:23,310 INFO L226 Difference]: Without dead ends: 96 [2021-11-20 22:49:23,310 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 22:49:23,311 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 47 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 22:49:23,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 106 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 178 Invalid, 0 Unknown, 24 Unchecked, 0.5s Time] [2021-11-20 22:49:23,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-11-20 22:49:23,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 93. [2021-11-20 22:49:23,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 55 states have (on average 1.4727272727272727) internal successors, (81), 71 states have internal predecessors, (81), 12 states have call successors, (12), 7 states have call predecessors, (12), 8 states have return successors, (16), 14 states have call predecessors, (16), 12 states have call successors, (16) [2021-11-20 22:49:23,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 109 transitions. [2021-11-20 22:49:23,317 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 109 transitions. Word has length 21 [2021-11-20 22:49:23,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:49:23,318 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 109 transitions. [2021-11-20 22:49:23,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 22:49:23,318 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 109 transitions. [2021-11-20 22:49:23,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-20 22:49:23,319 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:49:23,319 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:49:23,337 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27cb0912-8a7e-4000-a49c-e20c6e2e4fe3/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-20 22:49:23,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27cb0912-8a7e-4000-a49c-e20c6e2e4fe3/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 22:49:23,531 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [maxErr0REQUIRES_VIOLATION, maxErr1REQUIRES_VIOLATION, maxErr2REQUIRES_VIOLATION, maxErr3REQUIRES_VIOLATION, maxErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 22:49:23,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:49:23,531 INFO L85 PathProgramCache]: Analyzing trace with hash -868680531, now seen corresponding path program 1 times [2021-11-20 22:49:23,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:49:23,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [843492872] [2021-11-20 22:49:23,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:49:23,531 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:49:23,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27cb0912-8a7e-4000-a49c-e20c6e2e4fe3/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:49:23,532 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27cb0912-8a7e-4000-a49c-e20c6e2e4fe3/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:49:23,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27cb0912-8a7e-4000-a49c-e20c6e2e4fe3/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-20 22:49:23,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:49:23,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 22:49:23,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:49:23,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:49:23,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:49:23,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:49:23,713 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:49:23,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [843492872] [2021-11-20 22:49:23,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [843492872] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 22:49:23,713 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:49:23,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-20 22:49:23,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914462762] [2021-11-20 22:49:23,714 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 22:49:23,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:49:23,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:49:23,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:49:23,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:49:23,716 INFO L87 Difference]: Start difference. First operand 93 states and 109 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 22:49:23,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:49:23,910 INFO L93 Difference]: Finished difference Result 95 states and 110 transitions. [2021-11-20 22:49:23,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:49:23,911 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 20 [2021-11-20 22:49:23,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:49:23,913 INFO L225 Difference]: With dead ends: 95 [2021-11-20 22:49:23,913 INFO L226 Difference]: Without dead ends: 79 [2021-11-20 22:49:23,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:49:23,914 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 42 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 22:49:23,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 82 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 22:49:23,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-11-20 22:49:23,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2021-11-20 22:49:23,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 46 states have (on average 1.5434782608695652) internal successors, (71), 61 states have internal predecessors, (71), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (13), 12 states have call predecessors, (13), 10 states have call successors, (13) [2021-11-20 22:49:23,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 94 transitions. [2021-11-20 22:49:23,921 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 94 transitions. Word has length 20 [2021-11-20 22:49:23,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:49:23,921 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 94 transitions. [2021-11-20 22:49:23,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 22:49:23,922 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 94 transitions. [2021-11-20 22:49:23,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-20 22:49:23,923 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:49:23,923 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:49:23,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27cb0912-8a7e-4000-a49c-e20c6e2e4fe3/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-20 22:49:24,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27cb0912-8a7e-4000-a49c-e20c6e2e4fe3/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 22:49:24,126 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting nondet_treeErr2REQUIRES_VIOLATION === [maxErr0REQUIRES_VIOLATION, maxErr1REQUIRES_VIOLATION, maxErr2REQUIRES_VIOLATION, maxErr3REQUIRES_VIOLATION, maxErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 22:49:24,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:49:24,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1828073472, now seen corresponding path program 1 times [2021-11-20 22:49:24,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:49:24,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [250360661] [2021-11-20 22:49:24,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:49:24,128 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:49:24,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27cb0912-8a7e-4000-a49c-e20c6e2e4fe3/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:49:24,129 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27cb0912-8a7e-4000-a49c-e20c6e2e4fe3/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:49:24,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27cb0912-8a7e-4000-a49c-e20c6e2e4fe3/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-20 22:49:24,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:49:24,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 22:49:24,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:49:24,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 22:49:24,480 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-20 22:49:24,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 29 [2021-11-20 22:49:24,518 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 22:49:24,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:49:30,946 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 22:49:30,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 66 treesize of output 106