./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memcleanup.prp --file ../../sv-benchmarks/c/forester-heap/sll-rb-sentinel-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (memcleanup) Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/forester-heap/sll-rb-sentinel-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/config/svcomp-MemCleanup-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-memcleanup) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b39a262e58c4b59fb1c3af72226955d8a31f5200 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-memcleanup) --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 00:19:14,386 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 00:19:14,388 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 00:19:14,417 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 00:19:14,418 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 00:19:14,419 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 00:19:14,420 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 00:19:14,422 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 00:19:14,424 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 00:19:14,427 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 00:19:14,428 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 00:19:14,431 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 00:19:14,431 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 00:19:14,437 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 00:19:14,438 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 00:19:14,440 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 00:19:14,443 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 00:19:14,444 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 00:19:14,447 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 00:19:14,451 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 00:19:14,454 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 00:19:14,455 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 00:19:14,458 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 00:19:14,459 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 00:19:14,469 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 00:19:14,470 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 00:19:14,471 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 00:19:14,473 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 00:19:14,473 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 00:19:14,474 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 00:19:14,475 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 00:19:14,475 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 00:19:14,476 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 00:19:14,477 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 00:19:14,478 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 00:19:14,478 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 00:19:14,479 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 00:19:14,479 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 00:19:14,479 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 00:19:14,480 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 00:19:14,481 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 00:19:14,482 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/config/svcomp-MemCleanup-32bit-Automizer_Default.epf [2021-10-13 00:19:14,525 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 00:19:14,525 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 00:19:14,525 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-13 00:19:14,529 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-13 00:19:14,530 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 00:19:14,530 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 00:19:14,530 INFO L138 SettingsManager]: * Use SBE=true [2021-10-13 00:19:14,530 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 00:19:14,530 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 00:19:14,531 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-13 00:19:14,531 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 00:19:14,531 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 00:19:14,531 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 00:19:14,531 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-13 00:19:14,532 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-13 00:19:14,532 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 00:19:14,532 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 00:19:14,532 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 00:19:14,532 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 00:19:14,533 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 00:19:14,533 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 00:19:14,533 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 00:19:14,533 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 00:19:14,533 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 00:19:14,534 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 00:19:14,534 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-13 00:19:14,534 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 00:19:14,534 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 00:19:14,534 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b39a262e58c4b59fb1c3af72226955d8a31f5200 [2021-10-13 00:19:14,772 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 00:19:14,812 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 00:19:14,815 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 00:19:14,816 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 00:19:14,817 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 00:19:14,818 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/../../sv-benchmarks/c/forester-heap/sll-rb-sentinel-2.i [2021-10-13 00:19:14,907 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/data/9a21351e3/25106c45561b49d4806d2bdcff9909c1/FLAG05beb2ee6 [2021-10-13 00:19:15,402 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 00:19:15,414 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/sv-benchmarks/c/forester-heap/sll-rb-sentinel-2.i [2021-10-13 00:19:15,434 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/data/9a21351e3/25106c45561b49d4806d2bdcff9909c1/FLAG05beb2ee6 [2021-10-13 00:19:15,707 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/data/9a21351e3/25106c45561b49d4806d2bdcff9909c1 [2021-10-13 00:19:15,709 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 00:19:15,710 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-13 00:19:15,712 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 00:19:15,712 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 00:19:15,715 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 00:19:15,716 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:19:15" (1/1) ... [2021-10-13 00:19:15,717 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@595570e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:19:15, skipping insertion in model container [2021-10-13 00:19:15,718 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:19:15" (1/1) ... [2021-10-13 00:19:15,724 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 00:19:15,773 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 00:19:16,071 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/sv-benchmarks/c/forester-heap/sll-rb-sentinel-2.i[22534,22547] [2021-10-13 00:19:16,074 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/sv-benchmarks/c/forester-heap/sll-rb-sentinel-2.i[22606,22619] [2021-10-13 00:19:16,076 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/sv-benchmarks/c/forester-heap/sll-rb-sentinel-2.i[22746,22759] [2021-10-13 00:19:16,077 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/sv-benchmarks/c/forester-heap/sll-rb-sentinel-2.i[22820,22833] [2021-10-13 00:19:16,082 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 00:19:16,090 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 00:19:16,147 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/sv-benchmarks/c/forester-heap/sll-rb-sentinel-2.i[22534,22547] [2021-10-13 00:19:16,163 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/sv-benchmarks/c/forester-heap/sll-rb-sentinel-2.i[22606,22619] [2021-10-13 00:19:16,165 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/sv-benchmarks/c/forester-heap/sll-rb-sentinel-2.i[22746,22759] [2021-10-13 00:19:16,168 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/sv-benchmarks/c/forester-heap/sll-rb-sentinel-2.i[22820,22833] [2021-10-13 00:19:16,171 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 00:19:16,202 INFO L208 MainTranslator]: Completed translation [2021-10-13 00:19:16,202 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:19:16 WrapperNode [2021-10-13 00:19:16,202 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 00:19:16,204 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 00:19:16,204 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 00:19:16,204 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 00:19:16,216 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:19:16" (1/1) ... [2021-10-13 00:19:16,216 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:19:16" (1/1) ... [2021-10-13 00:19:16,230 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:19:16" (1/1) ... [2021-10-13 00:19:16,230 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:19:16" (1/1) ... [2021-10-13 00:19:16,250 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:19:16" (1/1) ... [2021-10-13 00:19:16,256 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:19:16" (1/1) ... [2021-10-13 00:19:16,260 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:19:16" (1/1) ... [2021-10-13 00:19:16,267 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 00:19:16,268 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 00:19:16,268 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 00:19:16,268 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 00:19:16,273 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:19:16" (1/1) ... [2021-10-13 00:19:16,284 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 00:19:16,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:19:16,307 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 00:19:16,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 00:19:16,344 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-13 00:19:16,344 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 00:19:16,344 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-10-13 00:19:16,345 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-13 00:19:16,346 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-13 00:19:16,347 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-13 00:19:16,347 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-13 00:19:16,347 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-13 00:19:16,347 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-13 00:19:16,347 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-13 00:19:16,347 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-13 00:19:16,348 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-13 00:19:16,348 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-13 00:19:16,348 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-13 00:19:16,348 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-13 00:19:16,348 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-13 00:19:16,348 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-13 00:19:16,349 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-13 00:19:16,349 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-13 00:19:16,349 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-13 00:19:16,349 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-13 00:19:16,349 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-13 00:19:16,349 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-13 00:19:16,349 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-13 00:19:16,350 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-13 00:19:16,350 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-13 00:19:16,350 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-13 00:19:16,350 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-13 00:19:16,350 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-13 00:19:16,350 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-13 00:19:16,350 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-13 00:19:16,351 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-13 00:19:16,351 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-13 00:19:16,351 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-13 00:19:16,351 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-13 00:19:16,351 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-13 00:19:16,351 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-13 00:19:16,352 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-13 00:19:16,352 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-13 00:19:16,352 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-13 00:19:16,352 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-13 00:19:16,352 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-13 00:19:16,352 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-13 00:19:16,352 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-13 00:19:16,353 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-13 00:19:16,353 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-13 00:19:16,353 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-13 00:19:16,353 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-13 00:19:16,353 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-13 00:19:16,353 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-13 00:19:16,354 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-13 00:19:16,354 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-13 00:19:16,354 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-13 00:19:16,354 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-13 00:19:16,354 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-13 00:19:16,354 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-13 00:19:16,354 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-13 00:19:16,355 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-13 00:19:16,355 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-10-13 00:19:16,355 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-13 00:19:16,355 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-13 00:19:16,355 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-13 00:19:16,355 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-13 00:19:16,356 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-13 00:19:16,356 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-13 00:19:16,356 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-13 00:19:16,356 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-13 00:19:16,356 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-13 00:19:16,356 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-13 00:19:16,356 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-13 00:19:16,357 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-13 00:19:16,357 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-13 00:19:16,357 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-13 00:19:16,357 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-13 00:19:16,357 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-13 00:19:16,357 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-13 00:19:16,357 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-13 00:19:16,358 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-13 00:19:16,358 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-13 00:19:16,358 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-13 00:19:16,358 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-13 00:19:16,358 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-13 00:19:16,358 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-13 00:19:16,359 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-13 00:19:16,359 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-13 00:19:16,359 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-13 00:19:16,359 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-13 00:19:16,359 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-13 00:19:16,359 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-13 00:19:16,359 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-13 00:19:16,360 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-13 00:19:16,360 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-13 00:19:16,360 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-13 00:19:16,360 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-13 00:19:16,360 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-13 00:19:16,360 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-13 00:19:16,361 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-13 00:19:16,361 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-13 00:19:16,361 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-13 00:19:16,361 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-13 00:19:16,361 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-13 00:19:16,361 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-13 00:19:16,362 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-13 00:19:16,362 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-13 00:19:16,362 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-13 00:19:16,362 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-13 00:19:16,362 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-13 00:19:16,362 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-13 00:19:16,362 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-10-13 00:19:16,363 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-10-13 00:19:16,363 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-10-13 00:19:16,363 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-10-13 00:19:16,363 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 00:19:16,363 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-13 00:19:16,363 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 00:19:16,364 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-13 00:19:16,364 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-13 00:19:16,364 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-13 00:19:16,364 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-13 00:19:16,364 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 00:19:16,364 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-13 00:19:16,364 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 00:19:16,365 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 00:19:17,026 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 00:19:17,026 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-10-13 00:19:17,028 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:19:17 BoogieIcfgContainer [2021-10-13 00:19:17,028 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 00:19:17,030 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 00:19:17,030 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 00:19:17,033 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 00:19:17,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 12:19:15" (1/3) ... [2021-10-13 00:19:17,034 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6614ccfb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:19:17, skipping insertion in model container [2021-10-13 00:19:17,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:19:16" (2/3) ... [2021-10-13 00:19:17,035 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6614ccfb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:19:17, skipping insertion in model container [2021-10-13 00:19:17,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:19:17" (3/3) ... [2021-10-13 00:19:17,036 INFO L111 eAbstractionObserver]: Analyzing ICFG sll-rb-sentinel-2.i [2021-10-13 00:19:17,041 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 00:19:17,041 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 61 error locations. [2021-10-13 00:19:17,084 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 00:19:17,090 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-13 00:19:17,090 INFO L340 AbstractCegarLoop]: Starting to check reachability of 61 error locations. [2021-10-13 00:19:17,108 INFO L276 IsEmpty]: Start isEmpty. Operand has 138 states, 72 states have (on average 2.138888888888889) internal successors, (154), 133 states have internal predecessors, (154), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-13 00:19:17,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-13 00:19:17,114 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:19:17,115 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:19:17,115 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 56 more)] === [2021-10-13 00:19:17,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:19:17,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1985602549, now seen corresponding path program 1 times [2021-10-13 00:19:17,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:19:17,128 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569743905] [2021-10-13 00:19:17,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:19:17,129 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:19:17,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:19:17,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:19:17,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:19:17,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:19:17,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:19:17,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569743905] [2021-10-13 00:19:17,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569743905] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:19:17,398 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:19:17,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 00:19:17,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476778646] [2021-10-13 00:19:17,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 00:19:17,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:19:17,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 00:19:17,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:19:17,428 INFO L87 Difference]: Start difference. First operand has 138 states, 72 states have (on average 2.138888888888889) internal successors, (154), 133 states have internal predecessors, (154), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:19:17,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:19:17,781 INFO L93 Difference]: Finished difference Result 166 states and 173 transitions. [2021-10-13 00:19:17,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 00:19:17,783 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 7 [2021-10-13 00:19:17,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:19:17,796 INFO L225 Difference]: With dead ends: 166 [2021-10-13 00:19:17,796 INFO L226 Difference]: Without dead ends: 163 [2021-10-13 00:19:17,797 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.1ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:19:17,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-10-13 00:19:17,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 137. [2021-10-13 00:19:17,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 75 states have (on average 1.8933333333333333) internal successors, (142), 133 states have internal predecessors, (142), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:19:17,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 145 transitions. [2021-10-13 00:19:17,835 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 145 transitions. Word has length 7 [2021-10-13 00:19:17,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:19:17,835 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 145 transitions. [2021-10-13 00:19:17,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:19:17,836 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 145 transitions. [2021-10-13 00:19:17,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-13 00:19:17,836 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:19:17,836 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:19:17,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 00:19:17,837 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 56 more)] === [2021-10-13 00:19:17,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:19:17,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1985602550, now seen corresponding path program 1 times [2021-10-13 00:19:17,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:19:17,838 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227252922] [2021-10-13 00:19:17,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:19:17,838 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:19:17,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:19:17,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:19:17,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:19:17,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:19:17,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:19:17,938 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227252922] [2021-10-13 00:19:17,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227252922] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:19:17,938 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:19:17,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 00:19:17,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601092462] [2021-10-13 00:19:17,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 00:19:17,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:19:17,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 00:19:17,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:19:17,944 INFO L87 Difference]: Start difference. First operand 137 states and 145 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:19:18,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:19:18,217 INFO L93 Difference]: Finished difference Result 134 states and 141 transitions. [2021-10-13 00:19:18,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 00:19:18,218 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 7 [2021-10-13 00:19:18,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:19:18,219 INFO L225 Difference]: With dead ends: 134 [2021-10-13 00:19:18,219 INFO L226 Difference]: Without dead ends: 134 [2021-10-13 00:19:18,220 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.3ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:19:18,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-10-13 00:19:18,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2021-10-13 00:19:18,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 75 states have (on average 1.84) internal successors, (138), 130 states have internal predecessors, (138), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:19:18,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 141 transitions. [2021-10-13 00:19:18,230 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 141 transitions. Word has length 7 [2021-10-13 00:19:18,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:19:18,231 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 141 transitions. [2021-10-13 00:19:18,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:19:18,231 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 141 transitions. [2021-10-13 00:19:18,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-13 00:19:18,232 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:19:18,232 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:19:18,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-13 00:19:18,232 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr4REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 56 more)] === [2021-10-13 00:19:18,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:19:18,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1499047333, now seen corresponding path program 1 times [2021-10-13 00:19:18,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:19:18,234 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039710347] [2021-10-13 00:19:18,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:19:18,234 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:19:18,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:19:18,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:19:18,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:19:18,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:19:18,340 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:19:18,340 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039710347] [2021-10-13 00:19:18,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039710347] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:19:18,341 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:19:18,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 00:19:18,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779802713] [2021-10-13 00:19:18,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 00:19:18,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:19:18,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 00:19:18,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:19:18,343 INFO L87 Difference]: Start difference. First operand 134 states and 141 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:19:18,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:19:18,582 INFO L93 Difference]: Finished difference Result 131 states and 137 transitions. [2021-10-13 00:19:18,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 00:19:18,584 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-10-13 00:19:18,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:19:18,587 INFO L225 Difference]: With dead ends: 131 [2021-10-13 00:19:18,587 INFO L226 Difference]: Without dead ends: 131 [2021-10-13 00:19:18,595 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.7ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:19:18,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-10-13 00:19:18,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 129. [2021-10-13 00:19:18,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 76 states have (on average 1.763157894736842) internal successors, (134), 125 states have internal predecessors, (134), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:19:18,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 137 transitions. [2021-10-13 00:19:18,605 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 137 transitions. Word has length 10 [2021-10-13 00:19:18,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:19:18,605 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 137 transitions. [2021-10-13 00:19:18,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:19:18,606 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 137 transitions. [2021-10-13 00:19:18,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-13 00:19:18,606 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:19:18,606 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:19:18,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-13 00:19:18,607 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 56 more)] === [2021-10-13 00:19:18,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:19:18,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1499047332, now seen corresponding path program 1 times [2021-10-13 00:19:18,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:19:18,611 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495813175] [2021-10-13 00:19:18,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:19:18,616 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:19:18,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:19:18,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:19:18,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:19:18,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:19:18,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:19:18,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495813175] [2021-10-13 00:19:18,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495813175] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:19:18,734 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:19:18,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 00:19:18,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481247733] [2021-10-13 00:19:18,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 00:19:18,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:19:18,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 00:19:18,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:19:18,736 INFO L87 Difference]: Start difference. First operand 129 states and 137 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:19:18,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:19:18,951 INFO L93 Difference]: Finished difference Result 147 states and 153 transitions. [2021-10-13 00:19:18,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 00:19:18,952 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-10-13 00:19:18,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:19:18,953 INFO L225 Difference]: With dead ends: 147 [2021-10-13 00:19:18,953 INFO L226 Difference]: Without dead ends: 147 [2021-10-13 00:19:18,954 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.4ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:19:18,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-10-13 00:19:18,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 134. [2021-10-13 00:19:18,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 83 states have (on average 1.6746987951807228) internal successors, (139), 130 states have internal predecessors, (139), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:19:18,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 142 transitions. [2021-10-13 00:19:18,963 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 142 transitions. Word has length 10 [2021-10-13 00:19:18,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:19:18,964 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 142 transitions. [2021-10-13 00:19:18,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:19:18,964 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 142 transitions. [2021-10-13 00:19:18,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-13 00:19:18,965 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:19:18,965 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:19:18,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-13 00:19:18,966 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr8REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 56 more)] === [2021-10-13 00:19:18,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:19:18,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1074084415, now seen corresponding path program 1 times [2021-10-13 00:19:18,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:19:18,967 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971653930] [2021-10-13 00:19:18,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:19:18,967 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:19:18,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:19:19,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:19:19,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:19:19,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:19:19,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:19:19,046 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971653930] [2021-10-13 00:19:19,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971653930] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:19:19,046 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:19:19,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 00:19:19,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143059625] [2021-10-13 00:19:19,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 00:19:19,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:19:19,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 00:19:19,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:19:19,048 INFO L87 Difference]: Start difference. First operand 134 states and 142 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:19:19,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:19:19,260 INFO L93 Difference]: Finished difference Result 138 states and 148 transitions. [2021-10-13 00:19:19,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 00:19:19,260 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-10-13 00:19:19,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:19:19,261 INFO L225 Difference]: With dead ends: 138 [2021-10-13 00:19:19,261 INFO L226 Difference]: Without dead ends: 138 [2021-10-13 00:19:19,262 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.6ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 00:19:19,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-10-13 00:19:19,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 125. [2021-10-13 00:19:19,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 85 states have (on average 1.5529411764705883) internal successors, (132), 121 states have internal predecessors, (132), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:19:19,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 135 transitions. [2021-10-13 00:19:19,283 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 135 transitions. Word has length 15 [2021-10-13 00:19:19,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:19:19,283 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 135 transitions. [2021-10-13 00:19:19,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:19:19,283 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 135 transitions. [2021-10-13 00:19:19,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-13 00:19:19,284 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:19:19,284 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:19:19,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-13 00:19:19,284 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr9REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 56 more)] === [2021-10-13 00:19:19,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:19:19,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1074084414, now seen corresponding path program 1 times [2021-10-13 00:19:19,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:19:19,286 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572833230] [2021-10-13 00:19:19,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:19:19,286 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:19:19,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:19:19,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:19:19,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:19:19,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:19:19,443 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:19:19,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572833230] [2021-10-13 00:19:19,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572833230] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:19:19,444 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:19:19,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-13 00:19:19,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431565084] [2021-10-13 00:19:19,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-13 00:19:19,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:19:19,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-13 00:19:19,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-13 00:19:19,449 INFO L87 Difference]: Start difference. First operand 125 states and 135 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:19:19,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:19:19,740 INFO L93 Difference]: Finished difference Result 162 states and 172 transitions. [2021-10-13 00:19:19,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 00:19:19,741 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-10-13 00:19:19,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:19:19,742 INFO L225 Difference]: With dead ends: 162 [2021-10-13 00:19:19,742 INFO L226 Difference]: Without dead ends: 162 [2021-10-13 00:19:19,742 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 73.3ms TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-10-13 00:19:19,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-10-13 00:19:19,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 132. [2021-10-13 00:19:19,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 93 states have (on average 1.5053763440860215) internal successors, (140), 128 states have internal predecessors, (140), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:19:19,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 143 transitions. [2021-10-13 00:19:19,751 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 143 transitions. Word has length 15 [2021-10-13 00:19:19,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:19:19,751 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 143 transitions. [2021-10-13 00:19:19,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:19:19,752 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 143 transitions. [2021-10-13 00:19:19,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-13 00:19:19,752 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:19:19,752 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:19:19,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-13 00:19:19,753 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr26ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 56 more)] === [2021-10-13 00:19:19,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:19:19,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1402989331, now seen corresponding path program 1 times [2021-10-13 00:19:19,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:19:19,754 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354443037] [2021-10-13 00:19:19,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:19:19,754 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:19:19,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:19:19,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:19:19,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:19:19,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:19:19,856 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:19:19,856 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354443037] [2021-10-13 00:19:19,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354443037] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:19:19,856 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:19:19,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-13 00:19:19,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286206674] [2021-10-13 00:19:19,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 00:19:19,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:19:19,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 00:19:19,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-13 00:19:19,858 INFO L87 Difference]: Start difference. First operand 132 states and 143 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:19:20,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:19:20,089 INFO L93 Difference]: Finished difference Result 171 states and 181 transitions. [2021-10-13 00:19:20,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 00:19:20,090 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-10-13 00:19:20,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:19:20,092 INFO L225 Difference]: With dead ends: 171 [2021-10-13 00:19:20,092 INFO L226 Difference]: Without dead ends: 171 [2021-10-13 00:19:20,093 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.0ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-13 00:19:20,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-10-13 00:19:20,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 133. [2021-10-13 00:19:20,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 95 states have (on average 1.4842105263157894) internal successors, (141), 129 states have internal predecessors, (141), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:19:20,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 144 transitions. [2021-10-13 00:19:20,108 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 144 transitions. Word has length 17 [2021-10-13 00:19:20,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:19:20,108 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 144 transitions. [2021-10-13 00:19:20,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:19:20,109 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 144 transitions. [2021-10-13 00:19:20,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-13 00:19:20,109 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:19:20,110 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:19:20,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-13 00:19:20,110 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr12REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 56 more)] === [2021-10-13 00:19:20,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:19:20,110 INFO L82 PathProgramCache]: Analyzing trace with hash 364071747, now seen corresponding path program 1 times [2021-10-13 00:19:20,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:19:20,111 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294673468] [2021-10-13 00:19:20,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:19:20,111 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:19:20,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:19:20,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:19:20,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:19:20,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:19:20,223 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:19:20,223 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294673468] [2021-10-13 00:19:20,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294673468] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:19:20,224 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:19:20,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-13 00:19:20,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898064240] [2021-10-13 00:19:20,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-13 00:19:20,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:19:20,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-13 00:19:20,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-13 00:19:20,225 INFO L87 Difference]: Start difference. First operand 133 states and 144 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:19:20,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:19:20,504 INFO L93 Difference]: Finished difference Result 133 states and 144 transitions. [2021-10-13 00:19:20,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-13 00:19:20,505 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-10-13 00:19:20,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:19:20,506 INFO L225 Difference]: With dead ends: 133 [2021-10-13 00:19:20,506 INFO L226 Difference]: Without dead ends: 133 [2021-10-13 00:19:20,507 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 68.7ms TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-10-13 00:19:20,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-10-13 00:19:20,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 132. [2021-10-13 00:19:20,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 95 states have (on average 1.4736842105263157) internal successors, (140), 128 states have internal predecessors, (140), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:19:20,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 143 transitions. [2021-10-13 00:19:20,511 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 143 transitions. Word has length 19 [2021-10-13 00:19:20,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:19:20,512 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 143 transitions. [2021-10-13 00:19:20,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:19:20,512 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 143 transitions. [2021-10-13 00:19:20,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-13 00:19:20,513 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:19:20,513 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:19:20,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-13 00:19:20,513 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr13REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 56 more)] === [2021-10-13 00:19:20,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:19:20,514 INFO L82 PathProgramCache]: Analyzing trace with hash 364071748, now seen corresponding path program 1 times [2021-10-13 00:19:20,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:19:20,514 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449374489] [2021-10-13 00:19:20,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:19:20,515 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:19:20,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:19:20,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:19:20,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:19:20,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:19:20,606 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:19:20,606 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449374489] [2021-10-13 00:19:20,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449374489] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:19:20,607 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:19:20,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-13 00:19:20,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226538197] [2021-10-13 00:19:20,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-13 00:19:20,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:19:20,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-13 00:19:20,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-13 00:19:20,609 INFO L87 Difference]: Start difference. First operand 132 states and 143 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:19:20,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:19:20,930 INFO L93 Difference]: Finished difference Result 134 states and 146 transitions. [2021-10-13 00:19:20,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-13 00:19:20,931 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-10-13 00:19:20,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:19:20,932 INFO L225 Difference]: With dead ends: 134 [2021-10-13 00:19:20,932 INFO L226 Difference]: Without dead ends: 134 [2021-10-13 00:19:20,932 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 106.3ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-10-13 00:19:20,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-10-13 00:19:20,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 127. [2021-10-13 00:19:20,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 95 states have (on average 1.4210526315789473) internal successors, (135), 123 states have internal predecessors, (135), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:19:20,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 138 transitions. [2021-10-13 00:19:20,937 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 138 transitions. Word has length 19 [2021-10-13 00:19:20,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:19:20,938 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 138 transitions. [2021-10-13 00:19:20,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:19:20,938 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 138 transitions. [2021-10-13 00:19:20,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-13 00:19:20,939 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:19:20,939 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:19:20,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-13 00:19:20,939 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr29ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 56 more)] === [2021-10-13 00:19:20,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:19:20,940 INFO L82 PathProgramCache]: Analyzing trace with hash -2124403342, now seen corresponding path program 1 times [2021-10-13 00:19:20,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:19:20,940 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272670683] [2021-10-13 00:19:20,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:19:20,941 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:19:20,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:19:21,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:19:21,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:19:21,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:19:21,075 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:19:21,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272670683] [2021-10-13 00:19:21,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272670683] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:19:21,076 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:19:21,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-13 00:19:21,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820063104] [2021-10-13 00:19:21,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-13 00:19:21,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:19:21,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-13 00:19:21,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-10-13 00:19:21,078 INFO L87 Difference]: Start difference. First operand 127 states and 138 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:19:21,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:19:21,376 INFO L93 Difference]: Finished difference Result 188 states and 204 transitions. [2021-10-13 00:19:21,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-13 00:19:21,376 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-10-13 00:19:21,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:19:21,378 INFO L225 Difference]: With dead ends: 188 [2021-10-13 00:19:21,378 INFO L226 Difference]: Without dead ends: 188 [2021-10-13 00:19:21,378 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 78.3ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-10-13 00:19:21,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-10-13 00:19:21,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 134. [2021-10-13 00:19:21,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 102 states have (on average 1.4019607843137254) internal successors, (143), 130 states have internal predecessors, (143), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:19:21,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 146 transitions. [2021-10-13 00:19:21,385 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 146 transitions. Word has length 20 [2021-10-13 00:19:21,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:19:21,386 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 146 transitions. [2021-10-13 00:19:21,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:19:21,386 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 146 transitions. [2021-10-13 00:19:21,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-13 00:19:21,390 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:19:21,390 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:19:21,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-13 00:19:21,391 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr34ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 56 more)] === [2021-10-13 00:19:21,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:19:21,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1088936686, now seen corresponding path program 1 times [2021-10-13 00:19:21,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:19:21,394 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064600400] [2021-10-13 00:19:21,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:19:21,395 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:19:21,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:19:21,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:19:21,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:19:21,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:19:21,509 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:19:21,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064600400] [2021-10-13 00:19:21,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064600400] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:19:21,510 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:19:21,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-13 00:19:21,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045355430] [2021-10-13 00:19:21,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 00:19:21,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:19:21,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 00:19:21,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-13 00:19:21,512 INFO L87 Difference]: Start difference. First operand 134 states and 146 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:19:21,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:19:21,702 INFO L93 Difference]: Finished difference Result 138 states and 149 transitions. [2021-10-13 00:19:21,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 00:19:21,703 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2021-10-13 00:19:21,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:19:21,704 INFO L225 Difference]: With dead ends: 138 [2021-10-13 00:19:21,704 INFO L226 Difference]: Without dead ends: 138 [2021-10-13 00:19:21,705 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.4ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-13 00:19:21,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-10-13 00:19:21,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 133. [2021-10-13 00:19:21,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 101 states have (on average 1.396039603960396) internal successors, (141), 129 states have internal predecessors, (141), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:19:21,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 144 transitions. [2021-10-13 00:19:21,709 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 144 transitions. Word has length 27 [2021-10-13 00:19:21,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:19:21,710 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 144 transitions. [2021-10-13 00:19:21,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:19:21,710 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 144 transitions. [2021-10-13 00:19:21,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-13 00:19:21,716 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:19:21,716 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:19:21,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-13 00:19:21,717 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr30REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 56 more)] === [2021-10-13 00:19:21,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:19:21,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1130954939, now seen corresponding path program 1 times [2021-10-13 00:19:21,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:19:21,717 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22307945] [2021-10-13 00:19:21,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:19:21,718 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:19:21,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:19:21,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:19:21,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:19:21,844 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:19:21,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:19:21,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22307945] [2021-10-13 00:19:21,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22307945] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:19:21,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864155497] [2021-10-13 00:19:21,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:19:21,845 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:19:21,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:19:21,847 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:19:21,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 00:19:21,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:19:21,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-13 00:19:21,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:19:22,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 00:19:22,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 00:19:22,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:19:22,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-10-13 00:19:22,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:19:22,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-10-13 00:19:22,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-10-13 00:19:22,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2021-10-13 00:19:22,446 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:19:22,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864155497] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:19:22,447 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:19:22,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-10-13 00:19:22,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651184735] [2021-10-13 00:19:22,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 00:19:22,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:19:22,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 00:19:22,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-10-13 00:19:22,449 INFO L87 Difference]: Start difference. First operand 133 states and 144 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:19:22,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:19:22,886 INFO L93 Difference]: Finished difference Result 160 states and 172 transitions. [2021-10-13 00:19:22,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-13 00:19:22,886 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2021-10-13 00:19:22,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:19:22,888 INFO L225 Difference]: With dead ends: 160 [2021-10-13 00:19:22,888 INFO L226 Difference]: Without dead ends: 160 [2021-10-13 00:19:22,888 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 145.4ms TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-10-13 00:19:22,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-10-13 00:19:22,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 140. [2021-10-13 00:19:22,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 108 states have (on average 1.3703703703703705) internal successors, (148), 136 states have internal predecessors, (148), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:19:22,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 151 transitions. [2021-10-13 00:19:22,894 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 151 transitions. Word has length 27 [2021-10-13 00:19:22,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:19:22,894 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 151 transitions. [2021-10-13 00:19:22,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:19:22,895 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 151 transitions. [2021-10-13 00:19:22,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-13 00:19:22,899 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:19:22,900 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:19:22,937 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 00:19:23,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:19:23,116 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr22REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 56 more)] === [2021-10-13 00:19:23,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:19:23,116 INFO L82 PathProgramCache]: Analyzing trace with hash 1099482672, now seen corresponding path program 1 times [2021-10-13 00:19:23,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:19:23,116 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079945321] [2021-10-13 00:19:23,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:19:23,116 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:19:23,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:19:23,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:19:23,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:19:23,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:19:23,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:19:23,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079945321] [2021-10-13 00:19:23,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079945321] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:19:23,211 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:19:23,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-13 00:19:23,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719728747] [2021-10-13 00:19:23,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-13 00:19:23,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:19:23,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-13 00:19:23,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-13 00:19:23,213 INFO L87 Difference]: Start difference. First operand 140 states and 151 transitions. Second operand has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:19:23,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:19:23,479 INFO L93 Difference]: Finished difference Result 140 states and 151 transitions. [2021-10-13 00:19:23,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 00:19:23,480 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2021-10-13 00:19:23,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:19:23,481 INFO L225 Difference]: With dead ends: 140 [2021-10-13 00:19:23,481 INFO L226 Difference]: Without dead ends: 140 [2021-10-13 00:19:23,481 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 61.8ms TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-10-13 00:19:23,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-10-13 00:19:23,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2021-10-13 00:19:23,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 108 states have (on average 1.3611111111111112) internal successors, (147), 135 states have internal predecessors, (147), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:19:23,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 150 transitions. [2021-10-13 00:19:23,486 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 150 transitions. Word has length 28 [2021-10-13 00:19:23,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:19:23,486 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 150 transitions. [2021-10-13 00:19:23,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:19:23,486 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 150 transitions. [2021-10-13 00:19:23,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-13 00:19:23,487 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:19:23,487 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:19:23,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-13 00:19:23,490 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr23REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 56 more)] === [2021-10-13 00:19:23,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:19:23,491 INFO L82 PathProgramCache]: Analyzing trace with hash 1099482673, now seen corresponding path program 1 times [2021-10-13 00:19:23,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:19:23,491 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062145945] [2021-10-13 00:19:23,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:19:23,492 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:19:23,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:19:23,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:19:23,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:19:23,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:19:23,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:19:23,605 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062145945] [2021-10-13 00:19:23,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062145945] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:19:23,606 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:19:23,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-13 00:19:23,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645666431] [2021-10-13 00:19:23,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-13 00:19:23,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:19:23,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-13 00:19:23,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-13 00:19:23,611 INFO L87 Difference]: Start difference. First operand 139 states and 150 transitions. Second operand has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:19:23,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:19:23,860 INFO L93 Difference]: Finished difference Result 137 states and 148 transitions. [2021-10-13 00:19:23,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 00:19:23,861 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2021-10-13 00:19:23,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:19:23,862 INFO L225 Difference]: With dead ends: 137 [2021-10-13 00:19:23,862 INFO L226 Difference]: Without dead ends: 137 [2021-10-13 00:19:23,862 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 58.5ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-10-13 00:19:23,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-10-13 00:19:23,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 130. [2021-10-13 00:19:23,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 103 states have (on average 1.3300970873786409) internal successors, (137), 126 states have internal predecessors, (137), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:19:23,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 140 transitions. [2021-10-13 00:19:23,866 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 140 transitions. Word has length 28 [2021-10-13 00:19:23,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:19:23,867 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 140 transitions. [2021-10-13 00:19:23,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:19:23,867 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 140 transitions. [2021-10-13 00:19:23,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-13 00:19:23,867 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:19:23,868 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:19:23,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-13 00:19:23,868 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr29ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 56 more)] === [2021-10-13 00:19:23,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:19:23,868 INFO L82 PathProgramCache]: Analyzing trace with hash 433521793, now seen corresponding path program 1 times [2021-10-13 00:19:23,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:19:23,869 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376277712] [2021-10-13 00:19:23,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:19:23,869 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:19:23,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:19:24,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:19:24,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:19:24,334 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:19:24,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:19:24,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376277712] [2021-10-13 00:19:24,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376277712] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:19:24,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642764961] [2021-10-13 00:19:24,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:19:24,336 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:19:24,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:19:24,337 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:19:24,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-13 00:19:24,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:19:24,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-13 00:19:24,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:19:24,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 00:19:24,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-13 00:19:24,647 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 00:19:24,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-13 00:19:24,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-13 00:19:24,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:19:24,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-13 00:19:24,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-10-13 00:19:24,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-13 00:19:24,879 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-10-13 00:19:24,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2021-10-13 00:19:25,114 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-10-13 00:19:25,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 14 [2021-10-13 00:19:25,120 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:19:25,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642764961] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:19:25,121 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:19:25,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12] total 26 [2021-10-13 00:19:25,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885249091] [2021-10-13 00:19:25,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-13 00:19:25,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:19:25,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-13 00:19:25,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2021-10-13 00:19:25,123 INFO L87 Difference]: Start difference. First operand 130 states and 140 transitions. Second operand has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:19:26,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:19:26,802 INFO L93 Difference]: Finished difference Result 224 states and 240 transitions. [2021-10-13 00:19:26,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-13 00:19:26,804 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2021-10-13 00:19:26,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:19:26,806 INFO L225 Difference]: With dead ends: 224 [2021-10-13 00:19:26,806 INFO L226 Difference]: Without dead ends: 224 [2021-10-13 00:19:26,807 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 956.3ms TimeCoverageRelationStatistics Valid=369, Invalid=1353, Unknown=0, NotChecked=0, Total=1722 [2021-10-13 00:19:26,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-10-13 00:19:26,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 145. [2021-10-13 00:19:26,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 118 states have (on average 1.305084745762712) internal successors, (154), 141 states have internal predecessors, (154), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:19:26,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 157 transitions. [2021-10-13 00:19:26,813 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 157 transitions. Word has length 30 [2021-10-13 00:19:26,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:19:26,813 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 157 transitions. [2021-10-13 00:19:26,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:19:26,813 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 157 transitions. [2021-10-13 00:19:26,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-13 00:19:26,814 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:19:26,814 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:19:26,840 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-10-13 00:19:27,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-13 00:19:27,028 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr45ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 56 more)] === [2021-10-13 00:19:27,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:19:27,028 INFO L82 PathProgramCache]: Analyzing trace with hash -1406132026, now seen corresponding path program 1 times [2021-10-13 00:19:27,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:19:27,028 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160756679] [2021-10-13 00:19:27,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:19:27,029 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:19:27,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:19:27,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:19:27,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:19:27,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 00:19:27,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:19:27,093 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160756679] [2021-10-13 00:19:27,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160756679] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:19:27,094 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:19:27,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 00:19:27,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104984343] [2021-10-13 00:19:27,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 00:19:27,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:19:27,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 00:19:27,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:19:27,096 INFO L87 Difference]: Start difference. First operand 145 states and 157 transitions. Second operand has 4 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:19:27,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:19:27,249 INFO L93 Difference]: Finished difference Result 146 states and 157 transitions. [2021-10-13 00:19:27,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 00:19:27,250 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2021-10-13 00:19:27,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:19:27,251 INFO L225 Difference]: With dead ends: 146 [2021-10-13 00:19:27,251 INFO L226 Difference]: Without dead ends: 146 [2021-10-13 00:19:27,252 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.4ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:19:27,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-10-13 00:19:27,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2021-10-13 00:19:27,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 119 states have (on average 1.2941176470588236) internal successors, (154), 142 states have internal predecessors, (154), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:19:27,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 157 transitions. [2021-10-13 00:19:27,256 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 157 transitions. Word has length 33 [2021-10-13 00:19:27,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:19:27,257 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 157 transitions. [2021-10-13 00:19:27,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:19:27,257 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 157 transitions. [2021-10-13 00:19:27,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-13 00:19:27,258 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:19:27,258 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:19:27,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-10-13 00:19:27,258 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr47REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 56 more)] === [2021-10-13 00:19:27,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:19:27,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1621828745, now seen corresponding path program 1 times [2021-10-13 00:19:27,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:19:27,259 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011610168] [2021-10-13 00:19:27,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:19:27,260 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:19:27,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:19:27,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:19:27,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:19:27,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:19:27,353 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:19:27,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011610168] [2021-10-13 00:19:27,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011610168] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:19:27,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083840647] [2021-10-13 00:19:27,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:19:27,354 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:19:27,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:19:27,355 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:19:27,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-13 00:19:27,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:19:27,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 00:19:27,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:19:27,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-13 00:19:27,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-10-13 00:19:27,651 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 00:19:27,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083840647] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:19:27,651 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-13 00:19:27,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 10 [2021-10-13 00:19:27,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187906066] [2021-10-13 00:19:27,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 00:19:27,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:19:27,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 00:19:27,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-13 00:19:27,654 INFO L87 Difference]: Start difference. First operand 146 states and 157 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:19:27,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:19:27,728 INFO L93 Difference]: Finished difference Result 154 states and 165 transitions. [2021-10-13 00:19:27,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 00:19:27,728 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2021-10-13 00:19:27,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:19:27,729 INFO L225 Difference]: With dead ends: 154 [2021-10-13 00:19:27,730 INFO L226 Difference]: Without dead ends: 154 [2021-10-13 00:19:27,730 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 63.5ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-10-13 00:19:27,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-10-13 00:19:27,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 149. [2021-10-13 00:19:27,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 122 states have (on average 1.2868852459016393) internal successors, (157), 145 states have internal predecessors, (157), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:19:27,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 160 transitions. [2021-10-13 00:19:27,735 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 160 transitions. Word has length 35 [2021-10-13 00:19:27,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:19:27,736 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 160 transitions. [2021-10-13 00:19:27,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:19:27,736 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 160 transitions. [2021-10-13 00:19:27,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-13 00:19:27,737 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:19:27,737 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:19:27,773 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-13 00:19:27,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-13 00:19:27,956 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr40REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 56 more)] === [2021-10-13 00:19:27,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:19:27,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1420252007, now seen corresponding path program 1 times [2021-10-13 00:19:27,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:19:27,957 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652263778] [2021-10-13 00:19:27,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:19:27,957 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:19:27,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:19:28,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:19:28,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:19:28,125 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:19:28,125 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:19:28,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652263778] [2021-10-13 00:19:28,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652263778] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:19:28,126 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093313017] [2021-10-13 00:19:28,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:19:28,126 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:19:28,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:19:28,128 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:19:28,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-13 00:19:28,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:19:28,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-13 00:19:28,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:19:28,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 00:19:28,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 00:19:28,364 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-10-13 00:19:28,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2021-10-13 00:19:28,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:19:28,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-10-13 00:19:28,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-10-13 00:19:28,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2021-10-13 00:19:28,544 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 00:19:28,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093313017] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:19:28,544 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:19:28,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 10 [2021-10-13 00:19:28,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372057108] [2021-10-13 00:19:28,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 00:19:28,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:19:28,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 00:19:28,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-10-13 00:19:28,546 INFO L87 Difference]: Start difference. First operand 149 states and 160 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:19:29,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:19:29,082 INFO L93 Difference]: Finished difference Result 203 states and 217 transitions. [2021-10-13 00:19:29,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-13 00:19:29,083 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2021-10-13 00:19:29,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:19:29,084 INFO L225 Difference]: With dead ends: 203 [2021-10-13 00:19:29,084 INFO L226 Difference]: Without dead ends: 203 [2021-10-13 00:19:29,085 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 206.9ms TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-10-13 00:19:29,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-10-13 00:19:29,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 160. [2021-10-13 00:19:29,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 133 states have (on average 1.2781954887218046) internal successors, (170), 156 states have internal predecessors, (170), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:19:29,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 173 transitions. [2021-10-13 00:19:29,090 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 173 transitions. Word has length 36 [2021-10-13 00:19:29,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:19:29,090 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 173 transitions. [2021-10-13 00:19:29,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:19:29,090 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 173 transitions. [2021-10-13 00:19:29,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-13 00:19:29,091 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:19:29,091 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:19:29,128 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-13 00:19:29,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-13 00:19:29,303 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr30REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 56 more)] === [2021-10-13 00:19:29,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:19:29,304 INFO L82 PathProgramCache]: Analyzing trace with hash -1928074548, now seen corresponding path program 1 times [2021-10-13 00:19:29,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:19:29,304 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349985932] [2021-10-13 00:19:29,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:19:29,304 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:19:29,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:19:29,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:19:29,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:19:29,484 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:19:29,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:19:29,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349985932] [2021-10-13 00:19:29,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349985932] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:19:29,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141525108] [2021-10-13 00:19:29,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:19:29,486 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:19:29,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:19:29,499 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:19:29,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-13 00:19:29,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:19:29,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-13 00:19:29,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:19:29,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 00:19:29,821 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-13 00:19:29,821 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 17 treesize of output 21 [2021-10-13 00:19:29,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-10-13 00:19:30,058 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 00:19:30,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 27 [2021-10-13 00:19:30,150 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-10-13 00:19:30,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 35 [2021-10-13 00:19:30,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-10-13 00:19:30,487 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:19:30,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141525108] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:19:30,488 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:19:30,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 23 [2021-10-13 00:19:30,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539656584] [2021-10-13 00:19:30,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-13 00:19:30,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:19:30,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-13 00:19:30,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-10-13 00:19:30,490 INFO L87 Difference]: Start difference. First operand 160 states and 173 transitions. Second operand has 24 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:19:31,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:19:31,389 INFO L93 Difference]: Finished difference Result 251 states and 271 transitions. [2021-10-13 00:19:31,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-13 00:19:31,389 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2021-10-13 00:19:31,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:19:31,391 INFO L225 Difference]: With dead ends: 251 [2021-10-13 00:19:31,391 INFO L226 Difference]: Without dead ends: 251 [2021-10-13 00:19:31,392 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 465.5ms TimeCoverageRelationStatistics Valid=208, Invalid=784, Unknown=0, NotChecked=0, Total=992 [2021-10-13 00:19:31,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-10-13 00:19:31,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 168. [2021-10-13 00:19:31,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 141 states have (on average 1.2765957446808511) internal successors, (180), 164 states have internal predecessors, (180), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:19:31,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 183 transitions. [2021-10-13 00:19:31,398 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 183 transitions. Word has length 37 [2021-10-13 00:19:31,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:19:31,398 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 183 transitions. [2021-10-13 00:19:31,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:19:31,398 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 183 transitions. [2021-10-13 00:19:31,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-13 00:19:31,399 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:19:31,399 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:19:31,432 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-10-13 00:19:31,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:19:31,619 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr31REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 56 more)] === [2021-10-13 00:19:31,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:19:31,619 INFO L82 PathProgramCache]: Analyzing trace with hash -1928074547, now seen corresponding path program 1 times [2021-10-13 00:19:31,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:19:31,620 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633228201] [2021-10-13 00:19:31,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:19:31,620 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:19:31,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:19:31,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:19:31,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:19:31,883 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:19:31,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:19:31,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633228201] [2021-10-13 00:19:31,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633228201] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:19:31,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967246014] [2021-10-13 00:19:31,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:19:31,884 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:19:31,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:19:31,887 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:19:31,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-13 00:19:32,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:19:32,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 37 conjunts are in the unsatisfiable core [2021-10-13 00:19:32,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:19:32,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 00:19:32,335 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 00:19:32,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-13 00:19:32,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 00:19:32,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-10-13 00:19:32,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 00:19:32,578 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 00:19:32,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2021-10-13 00:19:32,599 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 00:19:32,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 27 [2021-10-13 00:19:32,726 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-10-13 00:19:32,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 98 treesize of output 68 [2021-10-13 00:19:32,749 INFO L354 Elim1Store]: treesize reduction 96, result has 16.5 percent of original size [2021-10-13 00:19:32,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 67 treesize of output 42 [2021-10-13 00:19:33,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 34 [2021-10-13 00:19:33,095 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 00:19:33,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-10-13 00:19:33,115 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:19:33,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967246014] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:19:33,116 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:19:33,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-10-13 00:19:33,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327586886] [2021-10-13 00:19:33,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-13 00:19:33,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:19:33,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-13 00:19:33,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-10-13 00:19:33,118 INFO L87 Difference]: Start difference. First operand 168 states and 183 transitions. Second operand has 23 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:19:34,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:19:34,288 INFO L93 Difference]: Finished difference Result 234 states and 253 transitions. [2021-10-13 00:19:34,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-13 00:19:34,288 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2021-10-13 00:19:34,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:19:34,289 INFO L225 Difference]: With dead ends: 234 [2021-10-13 00:19:34,289 INFO L226 Difference]: Without dead ends: 234 [2021-10-13 00:19:34,290 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 718.5ms TimeCoverageRelationStatistics Valid=243, Invalid=1089, Unknown=0, NotChecked=0, Total=1332 [2021-10-13 00:19:34,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-10-13 00:19:34,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 171. [2021-10-13 00:19:34,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 144 states have (on average 1.2708333333333333) internal successors, (183), 167 states have internal predecessors, (183), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:19:34,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 186 transitions. [2021-10-13 00:19:34,296 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 186 transitions. Word has length 37 [2021-10-13 00:19:34,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:19:34,296 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 186 transitions. [2021-10-13 00:19:34,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:19:34,297 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 186 transitions. [2021-10-13 00:19:34,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-13 00:19:34,297 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:19:34,297 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:19:34,323 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-10-13 00:19:34,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:19:34,508 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr29ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 56 more)] === [2021-10-13 00:19:34,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:19:34,508 INFO L82 PathProgramCache]: Analyzing trace with hash -537111029, now seen corresponding path program 1 times [2021-10-13 00:19:34,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:19:34,508 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684066032] [2021-10-13 00:19:34,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:19:34,508 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:19:34,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:19:35,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:19:35,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:19:35,138 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:19:35,138 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:19:35,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684066032] [2021-10-13 00:19:35,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684066032] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:19:35,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873333442] [2021-10-13 00:19:35,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:19:35,139 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:19:35,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:19:35,140 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:19:35,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-13 00:19:35,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:19:35,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 34 conjunts are in the unsatisfiable core [2021-10-13 00:19:35,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:19:35,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 00:19:35,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-13 00:19:35,577 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 00:19:35,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-13 00:19:35,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:19:35,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-13 00:19:35,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-13 00:19:35,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-10-13 00:19:35,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-13 00:19:35,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-10-13 00:19:35,852 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 00:19:35,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-13 00:19:35,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-13 00:19:35,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:19:35,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 25 [2021-10-13 00:19:35,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-10-13 00:19:36,098 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-10-13 00:19:36,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 39 [2021-10-13 00:19:36,170 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-10-13 00:19:36,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2021-10-13 00:19:36,357 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-10-13 00:19:36,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 14 [2021-10-13 00:19:36,362 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:19:36,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873333442] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:19:36,363 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:19:36,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 36 [2021-10-13 00:19:36,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741926844] [2021-10-13 00:19:36,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-10-13 00:19:36,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:19:36,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-10-13 00:19:36,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1087, Unknown=0, NotChecked=0, Total=1260 [2021-10-13 00:19:36,365 INFO L87 Difference]: Start difference. First operand 171 states and 186 transitions. Second operand has 36 states, 36 states have (on average 1.8055555555555556) internal successors, (65), 35 states have internal predecessors, (65), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:19:37,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:19:37,915 INFO L93 Difference]: Finished difference Result 250 states and 271 transitions. [2021-10-13 00:19:37,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-13 00:19:37,915 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.8055555555555556) internal successors, (65), 35 states have internal predecessors, (65), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2021-10-13 00:19:37,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:19:37,916 INFO L225 Difference]: With dead ends: 250 [2021-10-13 00:19:37,917 INFO L226 Difference]: Without dead ends: 250 [2021-10-13 00:19:37,918 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 1154.0ms TimeCoverageRelationStatistics Valid=553, Invalid=2527, Unknown=0, NotChecked=0, Total=3080 [2021-10-13 00:19:37,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-10-13 00:19:37,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 186. [2021-10-13 00:19:37,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 159 states have (on average 1.251572327044025) internal successors, (199), 182 states have internal predecessors, (199), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:19:37,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 202 transitions. [2021-10-13 00:19:37,923 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 202 transitions. Word has length 37 [2021-10-13 00:19:37,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:19:37,924 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 202 transitions. [2021-10-13 00:19:37,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.8055555555555556) internal successors, (65), 35 states have internal predecessors, (65), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:19:37,924 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 202 transitions. [2021-10-13 00:19:37,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-13 00:19:37,925 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:19:37,925 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:19:37,954 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-13 00:19:38,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:19:38,139 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr58ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 56 more)] === [2021-10-13 00:19:38,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:19:38,140 INFO L82 PathProgramCache]: Analyzing trace with hash 1078138870, now seen corresponding path program 1 times [2021-10-13 00:19:38,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:19:38,140 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612071145] [2021-10-13 00:19:38,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:19:38,140 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:19:38,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:19:38,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:19:38,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:19:38,211 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 00:19:38,211 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:19:38,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612071145] [2021-10-13 00:19:38,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612071145] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:19:38,211 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:19:38,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 00:19:38,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640276024] [2021-10-13 00:19:38,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 00:19:38,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:19:38,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 00:19:38,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:19:38,215 INFO L87 Difference]: Start difference. First operand 186 states and 202 transitions. Second operand has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:19:38,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:19:38,341 INFO L93 Difference]: Finished difference Result 185 states and 200 transitions. [2021-10-13 00:19:38,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 00:19:38,342 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2021-10-13 00:19:38,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:19:38,343 INFO L225 Difference]: With dead ends: 185 [2021-10-13 00:19:38,343 INFO L226 Difference]: Without dead ends: 185 [2021-10-13 00:19:38,344 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.2ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:19:38,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-10-13 00:19:38,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2021-10-13 00:19:38,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 159 states have (on average 1.2389937106918238) internal successors, (197), 181 states have internal predecessors, (197), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:19:38,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 200 transitions. [2021-10-13 00:19:38,349 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 200 transitions. Word has length 37 [2021-10-13 00:19:38,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:19:38,349 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 200 transitions. [2021-10-13 00:19:38,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:19:38,350 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 200 transitions. [2021-10-13 00:19:38,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-13 00:19:38,350 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:19:38,350 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:19:38,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-10-13 00:19:38,351 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr60ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 56 more)] === [2021-10-13 00:19:38,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:19:38,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1004344249, now seen corresponding path program 1 times [2021-10-13 00:19:38,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:19:38,352 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023057714] [2021-10-13 00:19:38,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:19:38,352 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:19:38,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:19:38,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:19:38,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:19:38,540 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 00:19:38,540 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:19:38,541 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023057714] [2021-10-13 00:19:38,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023057714] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:19:38,541 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010937999] [2021-10-13 00:19:38,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:19:38,541 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:19:38,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:19:38,547 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:19:38,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-13 00:19:38,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:19:38,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-13 00:19:38,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:19:39,451 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 00:19:39,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010937999] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:19:39,452 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:19:39,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-10-13 00:19:39,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191816578] [2021-10-13 00:19:39,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-13 00:19:39,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:19:39,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-13 00:19:39,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-10-13 00:19:39,453 INFO L87 Difference]: Start difference. First operand 185 states and 200 transitions. Second operand has 15 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:19:39,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:19:39,866 INFO L93 Difference]: Finished difference Result 195 states and 209 transitions. [2021-10-13 00:19:39,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-13 00:19:39,867 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2021-10-13 00:19:39,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:19:39,868 INFO L225 Difference]: With dead ends: 195 [2021-10-13 00:19:39,868 INFO L226 Difference]: Without dead ends: 170 [2021-10-13 00:19:39,868 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 304.3ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-10-13 00:19:39,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-10-13 00:19:39,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2021-10-13 00:19:39,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 144 states have (on average 1.2569444444444444) internal successors, (181), 166 states have internal predecessors, (181), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:19:39,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 184 transitions. [2021-10-13 00:19:39,873 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 184 transitions. Word has length 39 [2021-10-13 00:19:39,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:19:39,873 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 184 transitions. [2021-10-13 00:19:39,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:19:39,874 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 184 transitions. [2021-10-13 00:19:39,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-13 00:19:39,874 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:19:39,875 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:19:39,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-13 00:19:40,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:19:40,095 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr29ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 56 more)] === [2021-10-13 00:19:40,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:19:40,096 INFO L82 PathProgramCache]: Analyzing trace with hash -497838896, now seen corresponding path program 2 times [2021-10-13 00:19:40,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:19:40,096 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262323947] [2021-10-13 00:19:40,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:19:40,096 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:19:40,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:19:40,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:19:40,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:19:40,602 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:19:40,602 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:19:40,602 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262323947] [2021-10-13 00:19:40,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262323947] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:19:40,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202166294] [2021-10-13 00:19:40,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 00:19:40,603 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:19:40,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:19:40,609 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:19:40,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-13 00:19:40,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 00:19:40,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:19:40,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 34 conjunts are in the unsatisfiable core [2021-10-13 00:19:40,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:19:40,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 00:19:41,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-13 00:19:41,104 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 00:19:41,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-13 00:19:41,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-13 00:19:41,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:19:41,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-13 00:19:41,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-10-13 00:19:41,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-13 00:19:41,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-10-13 00:19:41,405 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 00:19:41,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-13 00:19:41,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-13 00:19:41,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:19:41,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 25 [2021-10-13 00:19:41,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-10-13 00:19:41,633 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-10-13 00:19:41,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 39 [2021-10-13 00:19:41,725 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-10-13 00:19:41,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2021-10-13 00:19:41,899 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-10-13 00:19:41,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 14 [2021-10-13 00:19:41,905 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:19:41,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202166294] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:19:41,906 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:19:41,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 36 [2021-10-13 00:19:41,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454461027] [2021-10-13 00:19:41,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-10-13 00:19:41,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:19:41,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-10-13 00:19:41,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1078, Unknown=0, NotChecked=0, Total=1260 [2021-10-13 00:19:41,908 INFO L87 Difference]: Start difference. First operand 170 states and 184 transitions. Second operand has 36 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 35 states have internal predecessors, (71), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:19:43,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:19:43,321 INFO L93 Difference]: Finished difference Result 246 states and 267 transitions. [2021-10-13 00:19:43,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-13 00:19:43,322 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 35 states have internal predecessors, (71), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2021-10-13 00:19:43,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:19:43,323 INFO L225 Difference]: With dead ends: 246 [2021-10-13 00:19:43,323 INFO L226 Difference]: Without dead ends: 246 [2021-10-13 00:19:43,324 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 801 ImplicationChecksByTransitivity, 1112.3ms TimeCoverageRelationStatistics Valid=529, Invalid=2227, Unknown=0, NotChecked=0, Total=2756 [2021-10-13 00:19:43,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-10-13 00:19:43,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 180. [2021-10-13 00:19:43,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 154 states have (on average 1.2532467532467533) internal successors, (193), 176 states have internal predecessors, (193), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:19:43,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 196 transitions. [2021-10-13 00:19:43,329 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 196 transitions. Word has length 40 [2021-10-13 00:19:43,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:19:43,329 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 196 transitions. [2021-10-13 00:19:43,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 35 states have internal predecessors, (71), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:19:43,329 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 196 transitions. [2021-10-13 00:19:43,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-10-13 00:19:43,330 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:19:43,330 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:19:43,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-13 00:19:43,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:19:43,551 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr34ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 56 more)] === [2021-10-13 00:19:43,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:19:43,552 INFO L82 PathProgramCache]: Analyzing trace with hash 1451131193, now seen corresponding path program 1 times [2021-10-13 00:19:43,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:19:43,552 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31739312] [2021-10-13 00:19:43,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:19:43,552 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:19:43,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:19:44,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:19:44,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:19:44,024 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:19:44,024 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:19:44,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31739312] [2021-10-13 00:19:44,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31739312] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:19:44,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580504737] [2021-10-13 00:19:44,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:19:44,025 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:19:44,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:19:44,026 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:19:44,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-13 00:19:44,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:19:44,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 44 conjunts are in the unsatisfiable core [2021-10-13 00:19:44,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:19:44,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 00:19:44,593 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 00:19:44,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-13 00:19:44,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 00:19:44,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-10-13 00:19:44,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 00:19:44,857 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 00:19:44,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2021-10-13 00:19:44,877 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 00:19:44,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 27 [2021-10-13 00:19:44,983 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-10-13 00:19:44,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 91 [2021-10-13 00:19:44,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 94 [2021-10-13 00:19:45,006 INFO L354 Elim1Store]: treesize reduction 96, result has 16.5 percent of original size [2021-10-13 00:19:45,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 94 treesize of output 69 [2021-10-13 00:19:45,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 51 [2021-10-13 00:19:45,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 44 [2021-10-13 00:19:45,425 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 00:19:45,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 29 [2021-10-13 00:19:45,535 INFO L354 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2021-10-13 00:19:45,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 16 [2021-10-13 00:19:45,578 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:19:45,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580504737] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:19:45,579 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:19:45,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15] total 31 [2021-10-13 00:19:45,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992561921] [2021-10-13 00:19:45,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-13 00:19:45,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:19:45,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-13 00:19:45,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=840, Unknown=0, NotChecked=0, Total=930 [2021-10-13 00:19:45,581 INFO L87 Difference]: Start difference. First operand 180 states and 196 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:19:47,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:19:47,717 INFO L93 Difference]: Finished difference Result 234 states and 253 transitions. [2021-10-13 00:19:47,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-13 00:19:47,717 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2021-10-13 00:19:47,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:19:47,718 INFO L225 Difference]: With dead ends: 234 [2021-10-13 00:19:47,719 INFO L226 Difference]: Without dead ends: 234 [2021-10-13 00:19:47,720 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 1505.6ms TimeCoverageRelationStatistics Valid=342, Invalid=2010, Unknown=0, NotChecked=0, Total=2352 [2021-10-13 00:19:47,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-10-13 00:19:47,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 179. [2021-10-13 00:19:47,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 153 states have (on average 1.2483660130718954) internal successors, (191), 175 states have internal predecessors, (191), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:19:47,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 194 transitions. [2021-10-13 00:19:47,725 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 194 transitions. Word has length 42 [2021-10-13 00:19:47,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:19:47,726 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 194 transitions. [2021-10-13 00:19:47,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:19:47,726 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 194 transitions. [2021-10-13 00:19:47,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-10-13 00:19:47,727 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:19:47,727 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:19:47,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-13 00:19:47,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-10-13 00:19:47,943 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr30REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 56 more)] === [2021-10-13 00:19:47,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:19:47,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1493149446, now seen corresponding path program 2 times [2021-10-13 00:19:47,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:19:47,944 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742585866] [2021-10-13 00:19:47,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:19:47,944 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:19:47,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:19:48,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:19:48,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:19:48,214 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:19:48,214 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:19:48,214 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742585866] [2021-10-13 00:19:48,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742585866] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:19:48,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261014024] [2021-10-13 00:19:48,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 00:19:48,215 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:19:48,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:19:48,220 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:19:48,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-13 00:19:48,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 00:19:48,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:19:48,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 49 conjunts are in the unsatisfiable core [2021-10-13 00:19:48,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:19:48,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 00:19:48,880 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 00:19:48,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-13 00:19:48,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-13 00:19:48,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 00:19:49,122 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 00:19:49,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2021-10-13 00:19:49,140 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-10-13 00:19:49,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 22 [2021-10-13 00:19:49,294 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-13 00:19:49,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 65 [2021-10-13 00:19:49,300 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 00:19:49,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 44 [2021-10-13 00:19:49,835 INFO L354 Elim1Store]: treesize reduction 34, result has 8.1 percent of original size [2021-10-13 00:19:49,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 42 [2021-10-13 00:19:49,846 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-10-13 00:19:49,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 23 [2021-10-13 00:19:49,916 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:19:49,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261014024] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:19:49,916 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:19:49,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-10-13 00:19:49,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153215031] [2021-10-13 00:19:49,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-10-13 00:19:49,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:19:49,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-10-13 00:19:49,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2021-10-13 00:19:49,919 INFO L87 Difference]: Start difference. First operand 179 states and 194 transitions. Second operand has 30 states, 30 states have (on average 2.533333333333333) internal successors, (76), 29 states have internal predecessors, (76), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:19:51,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:19:51,195 INFO L93 Difference]: Finished difference Result 212 states and 229 transitions. [2021-10-13 00:19:51,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-13 00:19:51,195 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.533333333333333) internal successors, (76), 29 states have internal predecessors, (76), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2021-10-13 00:19:51,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:19:51,197 INFO L225 Difference]: With dead ends: 212 [2021-10-13 00:19:51,197 INFO L226 Difference]: Without dead ends: 212 [2021-10-13 00:19:51,198 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 974.8ms TimeCoverageRelationStatistics Valid=289, Invalid=1781, Unknown=0, NotChecked=0, Total=2070 [2021-10-13 00:19:51,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-10-13 00:19:51,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 181. [2021-10-13 00:19:51,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 155 states have (on average 1.2451612903225806) internal successors, (193), 177 states have internal predecessors, (193), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:19:51,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 196 transitions. [2021-10-13 00:19:51,203 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 196 transitions. Word has length 42 [2021-10-13 00:19:51,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:19:51,203 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 196 transitions. [2021-10-13 00:19:51,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.533333333333333) internal successors, (76), 29 states have internal predecessors, (76), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:19:51,205 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 196 transitions. [2021-10-13 00:19:51,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-10-13 00:19:51,205 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:19:51,205 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:19:51,241 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-13 00:19:51,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-10-13 00:19:51,419 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr30REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 56 more)] === [2021-10-13 00:19:51,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:19:51,420 INFO L82 PathProgramCache]: Analyzing trace with hash -1042044414, now seen corresponding path program 1 times [2021-10-13 00:19:51,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:19:51,420 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969812558] [2021-10-13 00:19:51,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:19:51,420 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:19:51,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:19:51,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:19:51,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:19:51,739 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:19:51,739 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:19:51,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969812558] [2021-10-13 00:19:51,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969812558] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:19:51,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950372197] [2021-10-13 00:19:51,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:19:51,740 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:19:51,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:19:51,741 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:19:51,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-13 00:19:52,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:19:52,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 38 conjunts are in the unsatisfiable core [2021-10-13 00:19:52,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:19:52,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 00:19:52,507 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 00:19:52,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-13 00:19:52,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-13 00:19:52,699 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 00:19:52,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 22 [2021-10-13 00:19:52,781 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-10-13 00:19:52,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 21 [2021-10-13 00:19:52,809 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 00:19:52,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-13 00:19:52,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 25 [2021-10-13 00:19:53,036 INFO L354 Elim1Store]: treesize reduction 52, result has 30.7 percent of original size [2021-10-13 00:19:53,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 49 [2021-10-13 00:19:53,131 INFO L354 Elim1Store]: treesize reduction 70, result has 26.3 percent of original size [2021-10-13 00:19:53,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 48 [2021-10-13 00:19:53,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-13 00:19:53,354 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:19:53,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950372197] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:19:53,355 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:19:53,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2021-10-13 00:19:53,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957889862] [2021-10-13 00:19:53,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-13 00:19:53,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:19:53,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-13 00:19:53,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=819, Unknown=0, NotChecked=0, Total=930 [2021-10-13 00:19:53,356 INFO L87 Difference]: Start difference. First operand 181 states and 196 transitions. Second operand has 31 states, 30 states have (on average 2.5) internal successors, (75), 30 states have internal predecessors, (75), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:19:54,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:19:54,597 INFO L93 Difference]: Finished difference Result 254 states and 274 transitions. [2021-10-13 00:19:54,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-13 00:19:54,598 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.5) internal successors, (75), 30 states have internal predecessors, (75), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2021-10-13 00:19:54,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:19:54,599 INFO L225 Difference]: With dead ends: 254 [2021-10-13 00:19:54,599 INFO L226 Difference]: Without dead ends: 254 [2021-10-13 00:19:54,600 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 969.9ms TimeCoverageRelationStatistics Valid=367, Invalid=1985, Unknown=0, NotChecked=0, Total=2352 [2021-10-13 00:19:54,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-10-13 00:19:54,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 194. [2021-10-13 00:19:54,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 168 states have (on average 1.2380952380952381) internal successors, (208), 190 states have internal predecessors, (208), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:19:54,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 211 transitions. [2021-10-13 00:19:54,606 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 211 transitions. Word has length 44 [2021-10-13 00:19:54,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:19:54,606 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 211 transitions. [2021-10-13 00:19:54,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.5) internal successors, (75), 30 states have internal predecessors, (75), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:19:54,606 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 211 transitions. [2021-10-13 00:19:54,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-10-13 00:19:54,607 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:19:54,607 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:19:54,644 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-13 00:19:54,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-10-13 00:19:54,808 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr31REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 56 more)] === [2021-10-13 00:19:54,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:19:54,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1042044413, now seen corresponding path program 1 times [2021-10-13 00:19:54,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:19:54,808 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486905792] [2021-10-13 00:19:54,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:19:54,809 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:19:54,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:19:55,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:19:55,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:19:55,204 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:19:55,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:19:55,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486905792] [2021-10-13 00:19:55,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486905792] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:19:55,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682620578] [2021-10-13 00:19:55,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:19:55,204 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:19:55,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:19:55,205 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:19:55,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-13 00:19:55,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:19:55,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 54 conjunts are in the unsatisfiable core [2021-10-13 00:19:55,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:19:55,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 00:19:55,875 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-13 00:19:55,875 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 17 treesize of output 21 [2021-10-13 00:19:55,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-10-13 00:19:55,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 00:19:56,117 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 00:19:56,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 27 [2021-10-13 00:19:56,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:19:56,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-10-13 00:19:56,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:19:56,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:19:56,267 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 00:19:56,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 21 [2021-10-13 00:19:56,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:19:56,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:19:56,279 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 00:19:56,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 30 [2021-10-13 00:19:56,369 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-10-13 00:19:56,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-10-13 00:19:56,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-10-13 00:19:56,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2021-10-13 00:19:56,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 34 [2021-10-13 00:19:56,834 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 00:19:56,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2021-10-13 00:19:56,859 INFO L354 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2021-10-13 00:19:56,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 86 treesize of output 55 [2021-10-13 00:19:56,980 INFO L354 Elim1Store]: treesize reduction 80, result has 15.8 percent of original size [2021-10-13 00:19:56,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 172 treesize of output 96 [2021-10-13 00:19:56,997 INFO L354 Elim1Store]: treesize reduction 120, result has 16.1 percent of original size [2021-10-13 00:19:56,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 129 treesize of output 92 [2021-10-13 00:19:57,523 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 00:19:57,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 55 [2021-10-13 00:19:57,533 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 00:19:57,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 32 [2021-10-13 00:19:57,666 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:19:57,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682620578] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:19:57,667 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:19:57,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 34 [2021-10-13 00:19:57,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473650592] [2021-10-13 00:19:57,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-10-13 00:19:57,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:19:57,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-10-13 00:19:57,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1073, Unknown=0, NotChecked=0, Total=1190 [2021-10-13 00:19:57,668 INFO L87 Difference]: Start difference. First operand 194 states and 211 transitions. Second operand has 35 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 34 states have internal predecessors, (81), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:20:01,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:20:01,137 INFO L93 Difference]: Finished difference Result 285 states and 308 transitions. [2021-10-13 00:20:01,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-10-13 00:20:01,137 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 34 states have internal predecessors, (81), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2021-10-13 00:20:01,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:20:01,139 INFO L225 Difference]: With dead ends: 285 [2021-10-13 00:20:01,139 INFO L226 Difference]: Without dead ends: 285 [2021-10-13 00:20:01,141 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 2458.4ms TimeCoverageRelationStatistics Valid=542, Invalid=3364, Unknown=0, NotChecked=0, Total=3906 [2021-10-13 00:20:01,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-10-13 00:20:01,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 197. [2021-10-13 00:20:01,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 171 states have (on average 1.2339181286549707) internal successors, (211), 193 states have internal predecessors, (211), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:20:01,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 214 transitions. [2021-10-13 00:20:01,146 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 214 transitions. Word has length 44 [2021-10-13 00:20:01,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:20:01,147 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 214 transitions. [2021-10-13 00:20:01,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 34 states have internal predecessors, (81), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:20:01,147 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 214 transitions. [2021-10-13 00:20:01,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-10-13 00:20:01,148 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:20:01,148 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:20:01,172 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-10-13 00:20:01,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-10-13 00:20:01,355 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr47REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 56 more)] === [2021-10-13 00:20:01,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:20:01,356 INFO L82 PathProgramCache]: Analyzing trace with hash -967348838, now seen corresponding path program 1 times [2021-10-13 00:20:01,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:20:01,356 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944297231] [2021-10-13 00:20:01,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:20:01,356 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:20:01,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:20:01,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:20:01,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:20:01,641 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 00:20:01,641 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:20:01,641 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944297231] [2021-10-13 00:20:01,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944297231] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:20:01,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379426327] [2021-10-13 00:20:01,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:20:01,642 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:20:01,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:20:01,649 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:20:01,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-13 00:20:02,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:20:02,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 36 conjunts are in the unsatisfiable core [2021-10-13 00:20:02,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:20:02,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 00:20:02,434 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-13 00:20:02,435 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 17 treesize of output 21 [2021-10-13 00:20:02,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-10-13 00:20:02,657 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 00:20:02,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 27 [2021-10-13 00:20:02,777 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-10-13 00:20:02,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 45 [2021-10-13 00:20:03,349 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 00:20:03,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 19 [2021-10-13 00:20:03,430 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-10-13 00:20:03,430 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 21 treesize of output 21 [2021-10-13 00:20:03,458 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:20:03,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379426327] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:20:03,458 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:20:03,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18] total 29 [2021-10-13 00:20:03,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521654451] [2021-10-13 00:20:03,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-10-13 00:20:03,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:20:03,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-10-13 00:20:03,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=746, Unknown=0, NotChecked=0, Total=870 [2021-10-13 00:20:03,460 INFO L87 Difference]: Start difference. First operand 197 states and 214 transitions. Second operand has 30 states, 29 states have (on average 2.8275862068965516) internal successors, (82), 29 states have internal predecessors, (82), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:20:05,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:20:05,713 INFO L93 Difference]: Finished difference Result 268 states and 288 transitions. [2021-10-13 00:20:05,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-10-13 00:20:05,713 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.8275862068965516) internal successors, (82), 29 states have internal predecessors, (82), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2021-10-13 00:20:05,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:20:05,715 INFO L225 Difference]: With dead ends: 268 [2021-10-13 00:20:05,715 INFO L226 Difference]: Without dead ends: 268 [2021-10-13 00:20:05,716 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1155 ImplicationChecksByTransitivity, 1807.7ms TimeCoverageRelationStatistics Valid=765, Invalid=3525, Unknown=0, NotChecked=0, Total=4290 [2021-10-13 00:20:05,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-10-13 00:20:05,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 206. [2021-10-13 00:20:05,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 180 states have (on average 1.2333333333333334) internal successors, (222), 202 states have internal predecessors, (222), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:20:05,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 225 transitions. [2021-10-13 00:20:05,723 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 225 transitions. Word has length 45 [2021-10-13 00:20:05,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:20:05,723 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 225 transitions. [2021-10-13 00:20:05,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.8275862068965516) internal successors, (82), 29 states have internal predecessors, (82), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:20:05,724 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 225 transitions. [2021-10-13 00:20:05,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-10-13 00:20:05,725 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:20:05,725 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:20:05,750 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-13 00:20:05,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-10-13 00:20:05,925 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting mainErr48REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 56 more)] === [2021-10-13 00:20:05,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:20:05,926 INFO L82 PathProgramCache]: Analyzing trace with hash -967348837, now seen corresponding path program 1 times [2021-10-13 00:20:05,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:20:05,926 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60857513] [2021-10-13 00:20:05,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:20:05,926 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:20:05,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:20:06,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:20:06,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:20:06,249 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:20:06,250 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:20:06,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60857513] [2021-10-13 00:20:06,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60857513] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:20:06,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957408407] [2021-10-13 00:20:06,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:20:06,250 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:20:06,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:20:06,251 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:20:06,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-13 00:20:07,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:20:07,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-13 00:20:07,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:20:07,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 00:20:07,168 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-13 00:20:07,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-10-13 00:20:07,281 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-10-13 00:20:07,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2021-10-13 00:20:07,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-10-13 00:20:07,431 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 00:20:07,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 26 [2021-10-13 00:20:07,509 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-10-13 00:20:07,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 44 [2021-10-13 00:20:07,745 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 00:20:07,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 18 [2021-10-13 00:20:07,809 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:20:07,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957408407] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:20:07,809 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:20:07,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 29 [2021-10-13 00:20:07,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528996576] [2021-10-13 00:20:07,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-13 00:20:07,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:20:07,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-13 00:20:07,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=733, Unknown=0, NotChecked=0, Total=812 [2021-10-13 00:20:07,811 INFO L87 Difference]: Start difference. First operand 206 states and 225 transitions. Second operand has 29 states, 29 states have (on average 2.8620689655172415) internal successors, (83), 28 states have internal predecessors, (83), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:20:09,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:20:09,207 INFO L93 Difference]: Finished difference Result 225 states and 243 transitions. [2021-10-13 00:20:09,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-13 00:20:09,208 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.8620689655172415) internal successors, (83), 28 states have internal predecessors, (83), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2021-10-13 00:20:09,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:20:09,209 INFO L225 Difference]: With dead ends: 225 [2021-10-13 00:20:09,209 INFO L226 Difference]: Without dead ends: 225 [2021-10-13 00:20:09,210 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 992.5ms TimeCoverageRelationStatistics Valid=339, Invalid=1823, Unknown=0, NotChecked=0, Total=2162 [2021-10-13 00:20:09,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-10-13 00:20:09,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 206. [2021-10-13 00:20:09,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 180 states have (on average 1.2277777777777779) internal successors, (221), 202 states have internal predecessors, (221), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:20:09,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 224 transitions. [2021-10-13 00:20:09,215 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 224 transitions. Word has length 45 [2021-10-13 00:20:09,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:20:09,215 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 224 transitions. [2021-10-13 00:20:09,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.8620689655172415) internal successors, (83), 28 states have internal predecessors, (83), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:20:09,216 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 224 transitions. [2021-10-13 00:20:09,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-10-13 00:20:09,216 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:20:09,217 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:20:09,253 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-13 00:20:09,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:20:09,439 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting mainErr30REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 56 more)] === [2021-10-13 00:20:09,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:20:09,440 INFO L82 PathProgramCache]: Analyzing trace with hash 953299869, now seen corresponding path program 3 times [2021-10-13 00:20:09,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:20:09,440 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943016012] [2021-10-13 00:20:09,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:20:09,440 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:20:09,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:20:09,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:20:09,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:20:09,740 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:20:09,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:20:09,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943016012] [2021-10-13 00:20:09,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943016012] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:20:09,741 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481313469] [2021-10-13 00:20:09,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 00:20:09,741 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:20:09,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:20:09,742 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:20:09,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-13 00:20:10,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-13 00:20:10,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:20:10,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 59 conjunts are in the unsatisfiable core [2021-10-13 00:20:10,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:20:10,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 00:20:10,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 00:20:10,752 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 00:20:10,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2021-10-13 00:20:10,769 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-10-13 00:20:10,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 22 [2021-10-13 00:20:10,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:20:10,877 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-13 00:20:10,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 25 [2021-10-13 00:20:10,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:20:10,888 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-13 00:20:10,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 21 [2021-10-13 00:20:10,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 00:20:11,042 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 00:20:11,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 21 [2021-10-13 00:20:11,066 INFO L354 Elim1Store]: treesize reduction 12, result has 62.5 percent of original size [2021-10-13 00:20:11,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 42 [2021-10-13 00:20:11,444 INFO L354 Elim1Store]: treesize reduction 79, result has 30.1 percent of original size [2021-10-13 00:20:11,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 116 treesize of output 112 [2021-10-13 00:20:11,481 INFO L354 Elim1Store]: treesize reduction 83, result has 26.5 percent of original size [2021-10-13 00:20:11,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 106 treesize of output 115 [2021-10-13 00:20:12,018 INFO L354 Elim1Store]: treesize reduction 126, result has 14.9 percent of original size [2021-10-13 00:20:12,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 116 treesize of output 102 [2021-10-13 00:20:12,044 INFO L354 Elim1Store]: treesize reduction 126, result has 14.9 percent of original size [2021-10-13 00:20:12,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 97 treesize of output 87 [2021-10-13 00:20:12,861 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 00:20:12,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 132 treesize of output 102 [2021-10-13 00:20:12,881 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-10-13 00:20:12,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 93 treesize of output 89 [2021-10-13 00:20:13,552 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:20:13,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481313469] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:20:13,553 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:20:13,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 33 [2021-10-13 00:20:13,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697873767] [2021-10-13 00:20:13,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-10-13 00:20:13,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:20:13,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-10-13 00:20:13,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1003, Unknown=0, NotChecked=0, Total=1122 [2021-10-13 00:20:13,555 INFO L87 Difference]: Start difference. First operand 206 states and 224 transitions. Second operand has 34 states, 33 states have (on average 2.606060606060606) internal successors, (86), 33 states have internal predecessors, (86), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:20:16,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:20:16,492 INFO L93 Difference]: Finished difference Result 299 states and 325 transitions. [2021-10-13 00:20:16,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-10-13 00:20:16,492 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.606060606060606) internal successors, (86), 33 states have internal predecessors, (86), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2021-10-13 00:20:16,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:20:16,495 INFO L225 Difference]: With dead ends: 299 [2021-10-13 00:20:16,496 INFO L226 Difference]: Without dead ends: 299 [2021-10-13 00:20:16,497 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 2453.6ms TimeCoverageRelationStatistics Valid=685, Invalid=3475, Unknown=0, NotChecked=0, Total=4160 [2021-10-13 00:20:16,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-10-13 00:20:16,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 229. [2021-10-13 00:20:16,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 203 states have (on average 1.2216748768472907) internal successors, (248), 225 states have internal predecessors, (248), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:20:16,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 251 transitions. [2021-10-13 00:20:16,504 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 251 transitions. Word has length 47 [2021-10-13 00:20:16,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:20:16,504 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 251 transitions. [2021-10-13 00:20:16,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.606060606060606) internal successors, (86), 33 states have internal predecessors, (86), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:20:16,505 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 251 transitions. [2021-10-13 00:20:16,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-10-13 00:20:16,505 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:20:16,505 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:20:16,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-13 00:20:16,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:20:16,719 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting mainErr31REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 56 more)] === [2021-10-13 00:20:16,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:20:16,720 INFO L82 PathProgramCache]: Analyzing trace with hash 953299870, now seen corresponding path program 2 times [2021-10-13 00:20:16,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:20:16,720 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283910342] [2021-10-13 00:20:16,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:20:16,720 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:20:16,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:20:17,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:20:17,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:20:17,146 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:20:17,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:20:17,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283910342] [2021-10-13 00:20:17,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283910342] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:20:17,147 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656149336] [2021-10-13 00:20:17,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 00:20:17,147 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:20:17,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:20:17,152 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:20:17,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-13 00:20:18,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 00:20:18,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:20:18,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 51 conjunts are in the unsatisfiable core [2021-10-13 00:20:18,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:20:18,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 00:20:18,232 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-13 00:20:18,232 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 17 treesize of output 21 [2021-10-13 00:20:18,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 00:20:18,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-10-13 00:20:18,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 00:20:18,543 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-10-13 00:20:18,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 26 [2021-10-13 00:20:18,564 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 00:20:18,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 32 [2021-10-13 00:20:18,791 INFO L354 Elim1Store]: treesize reduction 62, result has 28.7 percent of original size [2021-10-13 00:20:18,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 31 [2021-10-13 00:20:18,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:20:18,813 INFO L354 Elim1Store]: treesize reduction 47, result has 13.0 percent of original size [2021-10-13 00:20:18,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 60 treesize of output 35 [2021-10-13 00:20:18,905 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-10-13 00:20:18,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2021-10-13 00:20:18,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-10-13 00:20:19,031 INFO L354 Elim1Store]: treesize reduction 16, result has 63.6 percent of original size [2021-10-13 00:20:19,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 41 [2021-10-13 00:20:19,055 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-10-13 00:20:19,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 60 treesize of output 43 [2021-10-13 00:20:19,329 INFO L354 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2021-10-13 00:20:19,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 81 treesize of output 50 [2021-10-13 00:20:19,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-10-13 00:20:19,499 INFO L354 Elim1Store]: treesize reduction 80, result has 15.8 percent of original size [2021-10-13 00:20:19,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 152 treesize of output 84 [2021-10-13 00:20:19,510 INFO L354 Elim1Store]: treesize reduction 59, result has 10.6 percent of original size [2021-10-13 00:20:19,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 69 [2021-10-13 00:20:19,950 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 00:20:19,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 43 [2021-10-13 00:20:19,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-10-13 00:20:20,044 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:20:20,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656149336] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:20:20,045 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:20:20,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-10-13 00:20:20,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152716485] [2021-10-13 00:20:20,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-10-13 00:20:20,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:20:20,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-10-13 00:20:20,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=923, Unknown=0, NotChecked=0, Total=1056 [2021-10-13 00:20:20,046 INFO L87 Difference]: Start difference. First operand 229 states and 251 transitions. Second operand has 33 states, 32 states have (on average 2.625) internal successors, (84), 32 states have internal predecessors, (84), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:20:21,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:20:21,656 INFO L93 Difference]: Finished difference Result 312 states and 339 transitions. [2021-10-13 00:20:21,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-13 00:20:21,656 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.625) internal successors, (84), 32 states have internal predecessors, (84), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2021-10-13 00:20:21,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:20:21,657 INFO L225 Difference]: With dead ends: 312 [2021-10-13 00:20:21,657 INFO L226 Difference]: Without dead ends: 312 [2021-10-13 00:20:21,658 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 1424.2ms TimeCoverageRelationStatistics Valid=364, Invalid=2186, Unknown=0, NotChecked=0, Total=2550 [2021-10-13 00:20:21,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-10-13 00:20:21,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 216. [2021-10-13 00:20:21,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 190 states have (on average 1.2263157894736842) internal successors, (233), 212 states have internal predecessors, (233), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:20:21,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 236 transitions. [2021-10-13 00:20:21,663 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 236 transitions. Word has length 47 [2021-10-13 00:20:21,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:20:21,664 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 236 transitions. [2021-10-13 00:20:21,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.625) internal successors, (84), 32 states have internal predecessors, (84), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:20:21,664 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 236 transitions. [2021-10-13 00:20:21,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-10-13 00:20:21,665 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:20:21,665 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:20:21,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-13 00:20:21,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-10-13 00:20:21,879 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting mainErr29ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 56 more)] === [2021-10-13 00:20:21,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:20:21,880 INFO L82 PathProgramCache]: Analyzing trace with hash -1950703908, now seen corresponding path program 1 times [2021-10-13 00:20:21,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:20:21,880 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848602927] [2021-10-13 00:20:21,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:20:21,880 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:20:21,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:20:22,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:20:22,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:20:22,508 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 00:20:22,509 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:20:22,509 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848602927] [2021-10-13 00:20:22,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848602927] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:20:22,509 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429160685] [2021-10-13 00:20:22,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:20:22,510 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:20:22,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:20:22,524 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:20:22,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-13 00:20:23,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:20:23,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 45 conjunts are in the unsatisfiable core [2021-10-13 00:20:23,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:20:23,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 00:20:23,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-13 00:20:23,559 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 00:20:23,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-13 00:20:23,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-13 00:20:23,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:20:23,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-13 00:20:23,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-10-13 00:20:23,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-13 00:20:23,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-10-13 00:20:23,800 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-13 00:20:23,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-10-13 00:20:23,858 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-10-13 00:20:23,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 25 [2021-10-13 00:20:23,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-10-13 00:20:23,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 26 [2021-10-13 00:20:24,063 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-10-13 00:20:24,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 39 [2021-10-13 00:20:24,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-10-13 00:20:24,182 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-10-13 00:20:24,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-10-13 00:20:24,238 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-10-13 00:20:24,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 25 [2021-10-13 00:20:24,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-10-13 00:20:24,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-10-13 00:20:24,437 INFO L354 Elim1Store]: treesize reduction 51, result has 15.0 percent of original size [2021-10-13 00:20:24,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 33 [2021-10-13 00:20:24,516 INFO L354 Elim1Store]: treesize reduction 84, result has 18.4 percent of original size [2021-10-13 00:20:24,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 46 [2021-10-13 00:20:24,878 INFO L354 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2021-10-13 00:20:24,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 25 [2021-10-13 00:20:24,885 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:20:24,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429160685] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:20:24,885 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:20:24,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 43 [2021-10-13 00:20:24,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963878534] [2021-10-13 00:20:24,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-10-13 00:20:24,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:20:24,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-10-13 00:20:24,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1587, Unknown=0, NotChecked=0, Total=1806 [2021-10-13 00:20:24,887 INFO L87 Difference]: Start difference. First operand 216 states and 236 transitions. Second operand has 43 states, 43 states have (on average 1.9069767441860466) internal successors, (82), 42 states have internal predecessors, (82), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:20:55,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:20:55,777 INFO L93 Difference]: Finished difference Result 307 states and 336 transitions. [2021-10-13 00:20:55,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-10-13 00:20:55,778 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9069767441860466) internal successors, (82), 42 states have internal predecessors, (82), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2021-10-13 00:20:55,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:20:55,779 INFO L225 Difference]: With dead ends: 307 [2021-10-13 00:20:55,779 INFO L226 Difference]: Without dead ends: 307 [2021-10-13 00:20:55,781 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1593 ImplicationChecksByTransitivity, 4086.7ms TimeCoverageRelationStatistics Valid=915, Invalid=4635, Unknown=0, NotChecked=0, Total=5550 [2021-10-13 00:20:55,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-10-13 00:20:55,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 197. [2021-10-13 00:20:55,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 172 states have (on average 1.2267441860465116) internal successors, (211), 193 states have internal predecessors, (211), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:20:55,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 214 transitions. [2021-10-13 00:20:55,786 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 214 transitions. Word has length 47 [2021-10-13 00:20:55,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:20:55,786 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 214 transitions. [2021-10-13 00:20:55,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.9069767441860466) internal successors, (82), 42 states have internal predecessors, (82), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:20:55,787 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 214 transitions. [2021-10-13 00:20:55,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-10-13 00:20:55,787 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:20:55,788 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:20:55,825 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-13 00:20:56,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-10-13 00:20:56,002 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting mainErr34ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 56 more)] === [2021-10-13 00:20:56,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:20:56,002 INFO L82 PathProgramCache]: Analyzing trace with hash 349426627, now seen corresponding path program 1 times [2021-10-13 00:20:56,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:20:56,002 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734212562] [2021-10-13 00:20:56,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:20:56,003 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:20:56,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:20:57,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:20:57,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:20:57,061 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:20:57,061 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:20:57,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734212562] [2021-10-13 00:20:57,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734212562] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:20:57,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486967826] [2021-10-13 00:20:57,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:20:57,064 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:20:57,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:20:57,065 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:20:57,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-13 00:20:58,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:20:58,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 68 conjunts are in the unsatisfiable core [2021-10-13 00:20:58,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:20:58,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 00:20:58,069 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-13 00:20:58,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-10-13 00:20:58,222 INFO L354 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2021-10-13 00:20:58,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 33 [2021-10-13 00:20:58,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 00:20:58,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-10-13 00:20:58,602 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 00:20:58,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2021-10-13 00:20:58,628 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-10-13 00:20:58,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 31 [2021-10-13 00:20:58,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:20:58,830 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-13 00:20:58,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 21 [2021-10-13 00:20:58,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:20:58,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:20:58,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-10-13 00:20:58,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:20:58,930 INFO L354 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2021-10-13 00:20:58,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 21 treesize of output 25 [2021-10-13 00:20:59,070 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 00:20:59,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 33 [2021-10-13 00:20:59,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:20:59,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2021-10-13 00:20:59,331 INFO L354 Elim1Store]: treesize reduction 56, result has 21.1 percent of original size [2021-10-13 00:20:59,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 71 treesize of output 44 [2021-10-13 00:20:59,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:20:59,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-10-13 00:20:59,445 INFO L354 Elim1Store]: treesize reduction 126, result has 14.9 percent of original size [2021-10-13 00:20:59,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 172 treesize of output 95 [2021-10-13 00:20:59,465 INFO L354 Elim1Store]: treesize reduction 120, result has 16.1 percent of original size [2021-10-13 00:20:59,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 129 treesize of output 92 [2021-10-13 00:21:00,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-10-13 00:21:00,145 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-10-13 00:21:00,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 80 [2021-10-13 00:21:01,574 INFO L354 Elim1Store]: treesize reduction 29, result has 12.1 percent of original size [2021-10-13 00:21:01,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 75 treesize of output 33 [2021-10-13 00:21:01,582 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:21:01,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486967826] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:21:01,582 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:21:01,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 43 [2021-10-13 00:21:01,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087145340] [2021-10-13 00:21:01,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-10-13 00:21:01,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:21:01,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-10-13 00:21:01,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1625, Unknown=2, NotChecked=0, Total=1806 [2021-10-13 00:21:01,584 INFO L87 Difference]: Start difference. First operand 197 states and 214 transitions. Second operand has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 42 states have internal predecessors, (85), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:21:06,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:21:06,227 INFO L93 Difference]: Finished difference Result 277 states and 300 transitions. [2021-10-13 00:21:06,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-10-13 00:21:06,227 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 42 states have internal predecessors, (85), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2021-10-13 00:21:06,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:21:06,228 INFO L225 Difference]: With dead ends: 277 [2021-10-13 00:21:06,228 INFO L226 Difference]: Without dead ends: 277 [2021-10-13 00:21:06,230 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1045 ImplicationChecksByTransitivity, 5008.5ms TimeCoverageRelationStatistics Valid=619, Invalid=4070, Unknown=3, NotChecked=0, Total=4692 [2021-10-13 00:21:06,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-10-13 00:21:06,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 216. [2021-10-13 00:21:06,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 191 states have (on average 1.2146596858638743) internal successors, (232), 212 states have internal predecessors, (232), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:21:06,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 235 transitions. [2021-10-13 00:21:06,235 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 235 transitions. Word has length 49 [2021-10-13 00:21:06,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:21:06,235 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 235 transitions. [2021-10-13 00:21:06,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 42 states have internal predecessors, (85), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:21:06,236 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 235 transitions. [2021-10-13 00:21:06,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-10-13 00:21:06,236 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:21:06,237 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:21:06,263 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-13 00:21:06,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-10-13 00:21:06,459 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting mainErr30REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 56 more)] === [2021-10-13 00:21:06,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:21:06,460 INFO L82 PathProgramCache]: Analyzing trace with hash 391444880, now seen corresponding path program 2 times [2021-10-13 00:21:06,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:21:06,460 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852335173] [2021-10-13 00:21:06,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:21:06,460 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:21:06,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:21:06,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:21:06,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:21:06,853 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:21:06,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:21:06,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852335173] [2021-10-13 00:21:06,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852335173] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:21:06,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744388872] [2021-10-13 00:21:06,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 00:21:06,854 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:21:06,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:21:06,876 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:21:06,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-13 00:21:07,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 00:21:07,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:21:07,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 60 conjunts are in the unsatisfiable core [2021-10-13 00:21:07,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:21:07,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 00:21:08,096 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-13 00:21:08,096 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 17 treesize of output 21 [2021-10-13 00:21:08,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 00:21:08,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-10-13 00:21:08,383 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 00:21:08,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 27 [2021-10-13 00:21:08,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:21:08,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2021-10-13 00:21:08,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:21:08,531 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-13 00:21:08,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 30 [2021-10-13 00:21:08,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:21:08,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-10-13 00:21:08,618 INFO L354 Elim1Store]: treesize reduction 48, result has 36.0 percent of original size [2021-10-13 00:21:08,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 41 [2021-10-13 00:21:08,722 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-10-13 00:21:08,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 25 [2021-10-13 00:21:08,736 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 00:21:08,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 60 treesize of output 43 [2021-10-13 00:21:09,000 INFO L354 Elim1Store]: treesize reduction 56, result has 21.1 percent of original size [2021-10-13 00:21:09,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 73 treesize of output 46 [2021-10-13 00:21:09,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:21:09,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-10-13 00:21:09,094 INFO L354 Elim1Store]: treesize reduction 76, result has 16.5 percent of original size [2021-10-13 00:21:09,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 159 treesize of output 87 [2021-10-13 00:21:09,111 INFO L354 Elim1Store]: treesize reduction 120, result has 16.1 percent of original size [2021-10-13 00:21:09,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 79 [2021-10-13 00:21:09,529 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-10-13 00:21:09,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 72 [2021-10-13 00:21:09,720 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 00:21:09,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 34 [2021-10-13 00:21:11,887 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:21:11,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744388872] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:21:11,887 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:21:11,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 38 [2021-10-13 00:21:11,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993017] [2021-10-13 00:21:11,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-10-13 00:21:11,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:21:11,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-10-13 00:21:11,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1299, Unknown=1, NotChecked=0, Total=1482 [2021-10-13 00:21:11,889 INFO L87 Difference]: Start difference. First operand 216 states and 235 transitions. Second operand has 39 states, 38 states have (on average 2.3947368421052633) internal successors, (91), 38 states have internal predecessors, (91), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:21:24,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:21:24,387 INFO L93 Difference]: Finished difference Result 272 states and 296 transitions. [2021-10-13 00:21:24,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-10-13 00:21:24,388 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.3947368421052633) internal successors, (91), 38 states have internal predecessors, (91), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2021-10-13 00:21:24,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:21:24,389 INFO L225 Difference]: With dead ends: 272 [2021-10-13 00:21:24,389 INFO L226 Difference]: Without dead ends: 272 [2021-10-13 00:21:24,390 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 951 ImplicationChecksByTransitivity, 5805.7ms TimeCoverageRelationStatistics Valid=531, Invalid=3007, Unknown=2, NotChecked=0, Total=3540 [2021-10-13 00:21:24,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-10-13 00:21:24,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 220. [2021-10-13 00:21:24,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 195 states have (on average 1.2205128205128206) internal successors, (238), 216 states have internal predecessors, (238), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:21:24,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 241 transitions. [2021-10-13 00:21:24,394 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 241 transitions. Word has length 49 [2021-10-13 00:21:24,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:21:24,395 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 241 transitions. [2021-10-13 00:21:24,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.3947368421052633) internal successors, (91), 38 states have internal predecessors, (91), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:21:24,395 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 241 transitions. [2021-10-13 00:21:24,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-10-13 00:21:24,396 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:21:24,396 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:21:24,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-13 00:21:24,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-10-13 00:21:24,611 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting mainErr31REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 56 more)] === [2021-10-13 00:21:24,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:21:24,612 INFO L82 PathProgramCache]: Analyzing trace with hash 391444881, now seen corresponding path program 2 times [2021-10-13 00:21:24,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:21:24,612 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596196992] [2021-10-13 00:21:24,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:21:24,612 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:21:24,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:21:25,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:21:25,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:21:25,235 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:21:25,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:21:25,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596196992] [2021-10-13 00:21:25,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596196992] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:21:25,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054119293] [2021-10-13 00:21:25,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 00:21:25,236 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:21:25,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:21:25,239 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:21:25,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-13 00:21:26,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 00:21:26,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:21:26,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 66 conjunts are in the unsatisfiable core [2021-10-13 00:21:26,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:21:26,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 00:21:26,608 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-13 00:21:26,608 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 17 treesize of output 21 [2021-10-13 00:21:26,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 00:21:26,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-10-13 00:21:26,886 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 00:21:26,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 27 [2021-10-13 00:21:26,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2021-10-13 00:21:27,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:21:27,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-10-13 00:21:27,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:21:27,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-10-13 00:21:27,106 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-10-13 00:21:27,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-10-13 00:21:27,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 00:21:27,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 34 [2021-10-13 00:21:27,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:21:27,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2021-10-13 00:21:27,538 INFO L354 Elim1Store]: treesize reduction 56, result has 21.1 percent of original size [2021-10-13 00:21:27,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 93 treesize of output 66 [2021-10-13 00:21:27,558 INFO L354 Elim1Store]: treesize reduction 72, result has 20.9 percent of original size [2021-10-13 00:21:27,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 60 [2021-10-13 00:21:27,636 INFO L354 Elim1Store]: treesize reduction 76, result has 16.5 percent of original size [2021-10-13 00:21:27,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 161 treesize of output 89 [2021-10-13 00:21:27,662 INFO L354 Elim1Store]: treesize reduction 226, result has 13.1 percent of original size [2021-10-13 00:21:27,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 84 [2021-10-13 00:21:28,325 INFO L354 Elim1Store]: treesize reduction 29, result has 21.6 percent of original size [2021-10-13 00:21:28,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 105 treesize of output 59 [2021-10-13 00:21:28,342 INFO L354 Elim1Store]: treesize reduction 62, result has 4.6 percent of original size [2021-10-13 00:21:28,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 36 [2021-10-13 00:21:28,384 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:21:28,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054119293] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:21:28,384 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:21:28,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 37 [2021-10-13 00:21:28,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697007687] [2021-10-13 00:21:28,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-10-13 00:21:28,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:21:28,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-10-13 00:21:28,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1259, Unknown=0, NotChecked=0, Total=1406 [2021-10-13 00:21:28,386 INFO L87 Difference]: Start difference. First operand 220 states and 241 transitions. Second operand has 38 states, 37 states have (on average 2.324324324324324) internal successors, (86), 37 states have internal predecessors, (86), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:21:35,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:21:35,385 INFO L93 Difference]: Finished difference Result 276 states and 301 transitions. [2021-10-13 00:21:35,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-13 00:21:35,385 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.324324324324324) internal successors, (86), 37 states have internal predecessors, (86), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2021-10-13 00:21:35,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:21:35,387 INFO L225 Difference]: With dead ends: 276 [2021-10-13 00:21:35,387 INFO L226 Difference]: Without dead ends: 276 [2021-10-13 00:21:35,387 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 654 ImplicationChecksByTransitivity, 3224.2ms TimeCoverageRelationStatistics Valid=338, Invalid=2523, Unknown=1, NotChecked=0, Total=2862 [2021-10-13 00:21:35,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-10-13 00:21:35,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 219. [2021-10-13 00:21:35,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 194 states have (on average 1.2164948453608246) internal successors, (236), 215 states have internal predecessors, (236), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:21:35,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 239 transitions. [2021-10-13 00:21:35,391 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 239 transitions. Word has length 49 [2021-10-13 00:21:35,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:21:35,391 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 239 transitions. [2021-10-13 00:21:35,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.324324324324324) internal successors, (86), 37 states have internal predecessors, (86), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:21:35,391 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 239 transitions. [2021-10-13 00:21:35,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-10-13 00:21:35,392 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:21:35,392 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:21:35,420 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-10-13 00:21:35,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-10-13 00:21:35,595 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting mainErr48REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 56 more)] === [2021-10-13 00:21:35,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:21:35,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1346916309, now seen corresponding path program 2 times [2021-10-13 00:21:35,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:21:35,596 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808347773] [2021-10-13 00:21:35,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:21:35,596 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:21:35,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:21:35,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:21:35,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:21:35,894 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:21:35,894 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:21:35,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808347773] [2021-10-13 00:21:35,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808347773] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:21:35,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419175075] [2021-10-13 00:21:35,894 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 00:21:35,894 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:21:35,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:21:35,895 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:21:35,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-13 00:21:37,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-13 00:21:37,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:21:37,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 00:21:37,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:21:37,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-10-13 00:21:37,306 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-13 00:21:37,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419175075] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:21:37,306 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-13 00:21:37,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [16] total 21 [2021-10-13 00:21:37,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380851088] [2021-10-13 00:21:37,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 00:21:37,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:21:37,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 00:21:37,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-10-13 00:21:37,308 INFO L87 Difference]: Start difference. First operand 219 states and 239 transitions. Second operand has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:21:37,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:21:37,506 INFO L93 Difference]: Finished difference Result 226 states and 243 transitions. [2021-10-13 00:21:37,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 00:21:37,507 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2021-10-13 00:21:37,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:21:37,508 INFO L225 Difference]: With dead ends: 226 [2021-10-13 00:21:37,508 INFO L226 Difference]: Without dead ends: 226 [2021-10-13 00:21:37,508 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 252.2ms TimeCoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-10-13 00:21:37,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-10-13 00:21:37,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 206. [2021-10-13 00:21:37,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 181 states have (on average 1.2099447513812154) internal successors, (219), 202 states have internal predecessors, (219), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:21:37,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 222 transitions. [2021-10-13 00:21:37,513 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 222 transitions. Word has length 50 [2021-10-13 00:21:37,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:21:37,515 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 222 transitions. [2021-10-13 00:21:37,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:21:37,515 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 222 transitions. [2021-10-13 00:21:37,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-10-13 00:21:37,516 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:21:37,517 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:21:37,558 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-13 00:21:37,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:21:37,727 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting mainErr35REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 56 more)] === [2021-10-13 00:21:37,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:21:37,728 INFO L82 PathProgramCache]: Analyzing trace with hash -2052672236, now seen corresponding path program 1 times [2021-10-13 00:21:37,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:21:37,728 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938167102] [2021-10-13 00:21:37,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:21:37,728 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:21:37,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:21:38,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:21:38,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:21:38,140 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:21:38,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:21:38,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938167102] [2021-10-13 00:21:38,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938167102] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:21:38,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743539702] [2021-10-13 00:21:38,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:21:38,140 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:21:38,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:21:38,141 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:21:38,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-13 00:21:39,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:21:39,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 60 conjunts are in the unsatisfiable core [2021-10-13 00:21:39,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:21:39,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 00:21:39,536 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-13 00:21:39,537 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 17 treesize of output 21 [2021-10-13 00:21:39,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 00:21:39,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-10-13 00:21:39,828 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 00:21:39,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 27 [2021-10-13 00:21:39,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:21:39,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2021-10-13 00:21:39,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:21:39,997 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-13 00:21:39,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 21 [2021-10-13 00:21:40,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:21:40,011 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-13 00:21:40,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 30 [2021-10-13 00:21:40,095 INFO L354 Elim1Store]: treesize reduction 48, result has 36.0 percent of original size [2021-10-13 00:21:40,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 41 [2021-10-13 00:21:40,207 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-10-13 00:21:40,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 25 [2021-10-13 00:21:40,230 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 00:21:40,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 60 treesize of output 43 [2021-10-13 00:21:40,517 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 00:21:40,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2021-10-13 00:21:40,538 INFO L354 Elim1Store]: treesize reduction 56, result has 21.1 percent of original size [2021-10-13 00:21:40,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 73 treesize of output 46 [2021-10-13 00:21:40,644 INFO L354 Elim1Store]: treesize reduction 76, result has 16.5 percent of original size [2021-10-13 00:21:40,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 159 treesize of output 87 [2021-10-13 00:21:40,665 INFO L354 Elim1Store]: treesize reduction 120, result has 16.1 percent of original size [2021-10-13 00:21:40,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 79 [2021-10-13 00:21:41,168 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-10-13 00:21:41,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 72 [2021-10-13 00:21:41,393 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 00:21:41,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 34 [2021-10-13 00:21:43,628 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:21:43,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743539702] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:21:43,628 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:21:43,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 38 [2021-10-13 00:21:43,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301774473] [2021-10-13 00:21:43,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-10-13 00:21:43,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:21:43,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-10-13 00:21:43,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1301, Unknown=1, NotChecked=0, Total=1482 [2021-10-13 00:21:43,630 INFO L87 Difference]: Start difference. First operand 206 states and 222 transitions. Second operand has 39 states, 38 states have (on average 2.4473684210526314) internal successors, (93), 38 states have internal predecessors, (93), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:21:56,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:21:56,047 INFO L93 Difference]: Finished difference Result 248 states and 267 transitions. [2021-10-13 00:21:56,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-13 00:21:56,047 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.4473684210526314) internal successors, (93), 38 states have internal predecessors, (93), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2021-10-13 00:21:56,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:21:56,048 INFO L225 Difference]: With dead ends: 248 [2021-10-13 00:21:56,048 INFO L226 Difference]: Without dead ends: 248 [2021-10-13 00:21:56,049 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 823 ImplicationChecksByTransitivity, 5856.6ms TimeCoverageRelationStatistics Valid=476, Invalid=2714, Unknown=2, NotChecked=0, Total=3192 [2021-10-13 00:21:56,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-10-13 00:21:56,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 208. [2021-10-13 00:21:56,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 183 states have (on average 1.2131147540983607) internal successors, (222), 204 states have internal predecessors, (222), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:21:56,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 225 transitions. [2021-10-13 00:21:56,057 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 225 transitions. Word has length 50 [2021-10-13 00:21:56,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:21:56,058 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 225 transitions. [2021-10-13 00:21:56,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.4473684210526314) internal successors, (93), 38 states have internal predecessors, (93), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:21:56,058 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 225 transitions. [2021-10-13 00:21:56,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-10-13 00:21:56,059 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:21:56,059 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:21:56,101 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-10-13 00:21:56,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-10-13 00:21:56,287 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting mainErr36REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 56 more)] === [2021-10-13 00:21:56,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:21:56,288 INFO L82 PathProgramCache]: Analyzing trace with hash -2052672235, now seen corresponding path program 1 times [2021-10-13 00:21:56,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:21:56,288 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214033272] [2021-10-13 00:21:56,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:21:56,288 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:21:56,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:21:56,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:21:56,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:21:56,846 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:21:56,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:21:56,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214033272] [2021-10-13 00:21:56,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214033272] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:21:56,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450093802] [2021-10-13 00:21:56,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:21:56,846 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:21:56,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:21:56,847 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:21:56,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-10-13 00:21:58,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:21:58,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 66 conjunts are in the unsatisfiable core [2021-10-13 00:21:58,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:21:58,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 00:21:58,371 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-13 00:21:58,372 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 17 treesize of output 21 [2021-10-13 00:21:58,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 00:21:58,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-10-13 00:21:58,655 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 00:21:58,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 27 [2021-10-13 00:21:58,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2021-10-13 00:21:58,809 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-10-13 00:21:58,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 24 [2021-10-13 00:21:58,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:21:58,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-10-13 00:21:58,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 00:21:58,879 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-10-13 00:21:58,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-10-13 00:21:58,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 34 [2021-10-13 00:21:58,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 24 [2021-10-13 00:21:59,253 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-10-13 00:21:59,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 113 treesize of output 74 [2021-10-13 00:21:59,269 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-10-13 00:21:59,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 63 [2021-10-13 00:21:59,351 INFO L354 Elim1Store]: treesize reduction 96, result has 16.5 percent of original size [2021-10-13 00:21:59,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 205 treesize of output 97 [2021-10-13 00:21:59,377 INFO L354 Elim1Store]: treesize reduction 174, result has 13.0 percent of original size [2021-10-13 00:21:59,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 150 treesize of output 113 [2021-10-13 00:22:00,011 INFO L354 Elim1Store]: treesize reduction 29, result has 21.6 percent of original size [2021-10-13 00:22:00,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 105 treesize of output 59 [2021-10-13 00:22:00,028 INFO L354 Elim1Store]: treesize reduction 62, result has 4.6 percent of original size [2021-10-13 00:22:00,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 36 [2021-10-13 00:22:00,076 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:22:00,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450093802] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:22:00,076 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:22:00,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 37 [2021-10-13 00:22:00,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555941483] [2021-10-13 00:22:00,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-10-13 00:22:00,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:22:00,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-10-13 00:22:00,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1259, Unknown=0, NotChecked=0, Total=1406 [2021-10-13 00:22:00,078 INFO L87 Difference]: Start difference. First operand 208 states and 225 transitions. Second operand has 38 states, 37 states have (on average 2.3513513513513513) internal successors, (87), 37 states have internal predecessors, (87), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:22:04,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:22:04,071 INFO L93 Difference]: Finished difference Result 253 states and 272 transitions. [2021-10-13 00:22:04,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-13 00:22:04,072 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.3513513513513513) internal successors, (87), 37 states have internal predecessors, (87), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2021-10-13 00:22:04,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:22:04,073 INFO L225 Difference]: With dead ends: 253 [2021-10-13 00:22:04,073 INFO L226 Difference]: Without dead ends: 253 [2021-10-13 00:22:04,075 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 621 ImplicationChecksByTransitivity, 1866.9ms TimeCoverageRelationStatistics Valid=326, Invalid=2430, Unknown=0, NotChecked=0, Total=2756 [2021-10-13 00:22:04,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-10-13 00:22:04,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 210. [2021-10-13 00:22:04,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 185 states have (on average 1.2108108108108109) internal successors, (224), 206 states have internal predecessors, (224), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:22:04,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 227 transitions. [2021-10-13 00:22:04,080 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 227 transitions. Word has length 50 [2021-10-13 00:22:04,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:22:04,081 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 227 transitions. [2021-10-13 00:22:04,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.3513513513513513) internal successors, (87), 37 states have internal predecessors, (87), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:22:04,081 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 227 transitions. [2021-10-13 00:22:04,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-10-13 00:22:04,082 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:22:04,082 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:22:04,124 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-10-13 00:22:04,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-10-13 00:22:04,295 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting mainErr40REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 56 more)] === [2021-10-13 00:22:04,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:22:04,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1487901052, now seen corresponding path program 1 times [2021-10-13 00:22:04,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:22:04,296 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84057451] [2021-10-13 00:22:04,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:22:04,296 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:22:04,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:22:04,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:22:04,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:22:04,839 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:22:04,839 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:22:04,839 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84057451] [2021-10-13 00:22:04,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84057451] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:22:04,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897407805] [2021-10-13 00:22:04,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:22:04,840 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:22:04,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:22:04,841 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:22:04,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-10-13 00:22:06,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:22:06,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 56 conjunts are in the unsatisfiable core [2021-10-13 00:22:06,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:22:06,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 00:22:06,485 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 00:22:06,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-13 00:22:06,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-13 00:22:06,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 00:22:06,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-10-13 00:22:06,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-10-13 00:22:06,800 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-10-13 00:22:06,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 25 [2021-10-13 00:22:07,745 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 00:22:07,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 45 [2021-10-13 00:22:07,752 INFO L354 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2021-10-13 00:22:07,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 23 [2021-10-13 00:22:07,849 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-13 00:22:07,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-10-13 00:22:07,893 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:22:07,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897407805] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:22:07,894 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:22:07,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 39 [2021-10-13 00:22:07,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459628487] [2021-10-13 00:22:07,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-10-13 00:22:07,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:22:07,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-10-13 00:22:07,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1406, Unknown=0, NotChecked=0, Total=1560 [2021-10-13 00:22:07,895 INFO L87 Difference]: Start difference. First operand 210 states and 227 transitions. Second operand has 40 states, 39 states have (on average 2.282051282051282) internal successors, (89), 39 states have internal predecessors, (89), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:22:09,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:22:09,811 INFO L93 Difference]: Finished difference Result 240 states and 259 transitions. [2021-10-13 00:22:09,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-10-13 00:22:09,812 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 2.282051282051282) internal successors, (89), 39 states have internal predecessors, (89), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2021-10-13 00:22:09,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:22:09,813 INFO L225 Difference]: With dead ends: 240 [2021-10-13 00:22:09,813 INFO L226 Difference]: Without dead ends: 240 [2021-10-13 00:22:09,813 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 997 ImplicationChecksByTransitivity, 1814.2ms TimeCoverageRelationStatistics Valid=532, Invalid=3758, Unknown=0, NotChecked=0, Total=4290 [2021-10-13 00:22:09,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-10-13 00:22:09,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 227. [2021-10-13 00:22:09,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 202 states have (on average 1.2178217821782178) internal successors, (246), 223 states have internal predecessors, (246), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:22:09,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 249 transitions. [2021-10-13 00:22:09,817 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 249 transitions. Word has length 51 [2021-10-13 00:22:09,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:22:09,818 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 249 transitions. [2021-10-13 00:22:09,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 2.282051282051282) internal successors, (89), 39 states have internal predecessors, (89), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:22:09,818 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 249 transitions. [2021-10-13 00:22:09,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-10-13 00:22:09,819 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:22:09,819 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:22:09,866 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-10-13 00:22:10,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-10-13 00:22:10,035 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting mainErr41REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 56 more)] === [2021-10-13 00:22:10,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:22:10,036 INFO L82 PathProgramCache]: Analyzing trace with hash 1487901053, now seen corresponding path program 1 times [2021-10-13 00:22:10,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:22:10,036 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030051468] [2021-10-13 00:22:10,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:22:10,036 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:22:10,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:22:10,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:22:10,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:22:10,396 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:22:10,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:22:10,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030051468] [2021-10-13 00:22:10,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030051468] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:22:10,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852216166] [2021-10-13 00:22:10,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:22:10,396 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:22:10,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:22:10,397 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:22:10,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-10-13 00:22:11,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:22:11,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-13 00:22:11,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:22:12,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-10-13 00:22:12,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2021-10-13 00:22:12,471 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 00:22:12,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852216166] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:22:12,471 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:22:12,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10] total 26 [2021-10-13 00:22:12,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254867348] [2021-10-13 00:22:12,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-13 00:22:12,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:22:12,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-13 00:22:12,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=632, Unknown=0, NotChecked=0, Total=702 [2021-10-13 00:22:12,473 INFO L87 Difference]: Start difference. First operand 227 states and 249 transitions. Second operand has 27 states, 26 states have (on average 3.5) internal successors, (91), 26 states have internal predecessors, (91), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:22:14,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:22:14,259 INFO L93 Difference]: Finished difference Result 272 states and 292 transitions. [2021-10-13 00:22:14,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-10-13 00:22:14,260 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.5) internal successors, (91), 26 states have internal predecessors, (91), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2021-10-13 00:22:14,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:22:14,261 INFO L225 Difference]: With dead ends: 272 [2021-10-13 00:22:14,261 INFO L226 Difference]: Without dead ends: 272 [2021-10-13 00:22:14,262 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 1157.8ms TimeCoverageRelationStatistics Valid=468, Invalid=2394, Unknown=0, NotChecked=0, Total=2862 [2021-10-13 00:22:14,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-10-13 00:22:14,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 231. [2021-10-13 00:22:14,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 206 states have (on average 1.2087378640776698) internal successors, (249), 227 states have internal predecessors, (249), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:22:14,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 252 transitions. [2021-10-13 00:22:14,266 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 252 transitions. Word has length 51 [2021-10-13 00:22:14,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:22:14,266 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 252 transitions. [2021-10-13 00:22:14,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.5) internal successors, (91), 26 states have internal predecessors, (91), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:22:14,266 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 252 transitions. [2021-10-13 00:22:14,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-10-13 00:22:14,267 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:22:14,268 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:22:14,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-10-13 00:22:14,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:22:14,483 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting mainErr34ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 56 more)] === [2021-10-13 00:22:14,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:22:14,484 INFO L82 PathProgramCache]: Analyzing trace with hash -1827532024, now seen corresponding path program 2 times [2021-10-13 00:22:14,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:22:14,484 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476801944] [2021-10-13 00:22:14,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:22:14,484 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:22:14,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:22:15,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:22:15,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:22:15,457 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:22:15,457 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:22:15,457 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476801944] [2021-10-13 00:22:15,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476801944] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:22:15,458 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581698883] [2021-10-13 00:22:15,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 00:22:15,458 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:22:15,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:22:15,461 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:22:15,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-10-13 00:22:17,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 00:22:17,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:22:17,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 70 conjunts are in the unsatisfiable core [2021-10-13 00:22:17,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:22:17,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 00:22:17,094 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-13 00:22:17,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-10-13 00:22:17,248 INFO L354 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2021-10-13 00:22:17,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 33 [2021-10-13 00:22:17,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 00:22:17,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-10-13 00:22:17,633 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 00:22:17,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2021-10-13 00:22:17,647 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-10-13 00:22:17,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 31 [2021-10-13 00:22:17,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:22:17,814 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-13 00:22:17,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 30 [2021-10-13 00:22:17,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:22:17,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:22:17,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-10-13 00:22:17,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:22:17,954 INFO L354 Elim1Store]: treesize reduction 20, result has 45.9 percent of original size [2021-10-13 00:22:17,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 25 treesize of output 29 [2021-10-13 00:22:18,078 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 00:22:18,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 50 treesize of output 37 [2021-10-13 00:22:18,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:22:18,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2021-10-13 00:22:18,395 INFO L354 Elim1Store]: treesize reduction 56, result has 21.1 percent of original size [2021-10-13 00:22:18,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 100 treesize of output 69 [2021-10-13 00:22:18,412 INFO L354 Elim1Store]: treesize reduction 72, result has 20.9 percent of original size [2021-10-13 00:22:18,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 96 treesize of output 98 [2021-10-13 00:22:18,604 INFO L354 Elim1Store]: treesize reduction 126, result has 14.9 percent of original size [2021-10-13 00:22:18,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 183 treesize of output 102 [2021-10-13 00:22:18,638 INFO L354 Elim1Store]: treesize reduction 226, result has 13.1 percent of original size [2021-10-13 00:22:18,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 140 treesize of output 106 [2021-10-13 00:22:19,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-10-13 00:22:19,412 INFO L354 Elim1Store]: treesize reduction 56, result has 1.8 percent of original size [2021-10-13 00:22:19,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 111 treesize of output 83 [2021-10-13 00:22:20,942 INFO L354 Elim1Store]: treesize reduction 29, result has 12.1 percent of original size [2021-10-13 00:22:20,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 75 treesize of output 33 [2021-10-13 00:22:20,951 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:22:20,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581698883] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:22:20,951 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:22:20,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 43 [2021-10-13 00:22:20,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878277157] [2021-10-13 00:22:20,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-10-13 00:22:20,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:22:20,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-10-13 00:22:20,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1625, Unknown=2, NotChecked=0, Total=1806 [2021-10-13 00:22:20,953 INFO L87 Difference]: Start difference. First operand 231 states and 252 transitions. Second operand has 43 states, 43 states have (on average 2.116279069767442) internal successors, (91), 42 states have internal predecessors, (91), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:22:34,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:22:34,632 INFO L93 Difference]: Finished difference Result 290 states and 314 transitions. [2021-10-13 00:22:34,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-10-13 00:22:34,632 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.116279069767442) internal successors, (91), 42 states have internal predecessors, (91), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2021-10-13 00:22:34,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:22:34,633 INFO L225 Difference]: With dead ends: 290 [2021-10-13 00:22:34,633 INFO L226 Difference]: Without dead ends: 290 [2021-10-13 00:22:34,634 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 983 ImplicationChecksByTransitivity, 5256.5ms TimeCoverageRelationStatistics Valid=602, Invalid=3951, Unknown=3, NotChecked=0, Total=4556 [2021-10-13 00:22:34,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-10-13 00:22:34,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 236. [2021-10-13 00:22:34,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 211 states have (on average 1.2037914691943128) internal successors, (254), 232 states have internal predecessors, (254), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:22:34,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 257 transitions. [2021-10-13 00:22:34,638 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 257 transitions. Word has length 52 [2021-10-13 00:22:34,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:22:34,638 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 257 transitions. [2021-10-13 00:22:34,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.116279069767442) internal successors, (91), 42 states have internal predecessors, (91), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:22:34,639 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 257 transitions. [2021-10-13 00:22:34,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-10-13 00:22:34,639 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:22:34,639 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:22:34,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-10-13 00:22:34,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:22:34,866 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting mainErr30REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 56 more)] === [2021-10-13 00:22:34,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:22:34,866 INFO L82 PathProgramCache]: Analyzing trace with hash -1785513771, now seen corresponding path program 4 times [2021-10-13 00:22:34,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:22:34,867 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353103182] [2021-10-13 00:22:34,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:22:34,867 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:22:34,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:22:35,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:22:35,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:22:35,314 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:22:35,314 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:22:35,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353103182] [2021-10-13 00:22:35,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353103182] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:22:35,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426894600] [2021-10-13 00:22:35,315 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 00:22:35,315 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:22:35,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:22:35,316 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:22:35,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-10-13 00:22:36,989 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 00:22:36,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:22:36,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 60 conjunts are in the unsatisfiable core [2021-10-13 00:22:37,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:22:37,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 00:22:37,163 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-13 00:22:37,164 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 17 treesize of output 21 [2021-10-13 00:22:37,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 00:22:37,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-10-13 00:22:37,454 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 00:22:37,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 27 [2021-10-13 00:22:37,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2021-10-13 00:22:37,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:22:37,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-10-13 00:22:37,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:22:37,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-10-13 00:22:37,699 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-10-13 00:22:37,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2021-10-13 00:22:37,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2021-10-13 00:22:37,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 34 [2021-10-13 00:22:38,075 INFO L354 Elim1Store]: treesize reduction 56, result has 21.1 percent of original size [2021-10-13 00:22:38,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 73 treesize of output 46 [2021-10-13 00:22:38,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-10-13 00:22:38,235 INFO L354 Elim1Store]: treesize reduction 76, result has 16.5 percent of original size [2021-10-13 00:22:38,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 159 treesize of output 87 [2021-10-13 00:22:38,252 INFO L354 Elim1Store]: treesize reduction 120, result has 16.1 percent of original size [2021-10-13 00:22:38,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 79 [2021-10-13 00:22:38,677 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-10-13 00:22:38,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 72 [2021-10-13 00:22:38,883 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 00:22:38,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 34 [2021-10-13 00:22:41,072 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:22:41,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426894600] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:22:41,072 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:22:41,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 39 [2021-10-13 00:22:41,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334483434] [2021-10-13 00:22:41,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-10-13 00:22:41,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:22:41,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-10-13 00:22:41,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1374, Unknown=1, NotChecked=0, Total=1560 [2021-10-13 00:22:41,074 INFO L87 Difference]: Start difference. First operand 236 states and 257 transitions. Second operand has 40 states, 39 states have (on average 2.4871794871794872) internal successors, (97), 39 states have internal predecessors, (97), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:22:54,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:22:54,060 INFO L93 Difference]: Finished difference Result 288 states and 312 transitions. [2021-10-13 00:22:54,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-13 00:22:54,060 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 2.4871794871794872) internal successors, (97), 39 states have internal predecessors, (97), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2021-10-13 00:22:54,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:22:54,062 INFO L225 Difference]: With dead ends: 288 [2021-10-13 00:22:54,062 INFO L226 Difference]: Without dead ends: 288 [2021-10-13 00:22:54,062 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 825 ImplicationChecksByTransitivity, 5870.8ms TimeCoverageRelationStatistics Valid=488, Invalid=2816, Unknown=2, NotChecked=0, Total=3306 [2021-10-13 00:22:54,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-10-13 00:22:54,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 240. [2021-10-13 00:22:54,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 215 states have (on average 1.2093023255813953) internal successors, (260), 236 states have internal predecessors, (260), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:22:54,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 263 transitions. [2021-10-13 00:22:54,069 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 263 transitions. Word has length 52 [2021-10-13 00:22:54,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:22:54,069 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 263 transitions. [2021-10-13 00:22:54,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 2.4871794871794872) internal successors, (97), 39 states have internal predecessors, (97), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:22:54,070 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 263 transitions. [2021-10-13 00:22:54,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-10-13 00:22:54,070 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:22:54,071 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:22:54,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-10-13 00:22:54,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:22:54,287 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting mainErr31REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 56 more)] === [2021-10-13 00:22:54,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:22:54,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1785513770, now seen corresponding path program 3 times [2021-10-13 00:22:54,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:22:54,288 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165855680] [2021-10-13 00:22:54,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:22:54,288 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:22:54,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:22:55,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:22:55,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:22:55,105 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:22:55,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:22:55,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165855680] [2021-10-13 00:22:55,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165855680] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:22:55,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888482439] [2021-10-13 00:22:55,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 00:22:55,106 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:22:55,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:22:55,111 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:22:55,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-10-13 00:22:57,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-13 00:22:57,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:22:57,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 66 conjunts are in the unsatisfiable core [2021-10-13 00:22:57,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:22:57,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 00:22:57,299 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-13 00:22:57,299 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 17 treesize of output 21 [2021-10-13 00:22:57,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 00:22:57,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-10-13 00:22:57,601 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 00:22:57,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 27 [2021-10-13 00:22:57,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2021-10-13 00:22:57,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:22:57,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-10-13 00:22:57,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:22:57,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-10-13 00:22:57,890 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-10-13 00:22:57,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-10-13 00:22:57,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 00:22:58,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 34 [2021-10-13 00:22:58,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2021-10-13 00:22:58,299 INFO L354 Elim1Store]: treesize reduction 56, result has 21.1 percent of original size [2021-10-13 00:22:58,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 93 treesize of output 66 [2021-10-13 00:22:58,330 INFO L354 Elim1Store]: treesize reduction 72, result has 20.9 percent of original size [2021-10-13 00:22:58,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 60 [2021-10-13 00:22:58,483 INFO L354 Elim1Store]: treesize reduction 76, result has 16.5 percent of original size [2021-10-13 00:22:58,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 161 treesize of output 89 [2021-10-13 00:22:58,510 INFO L354 Elim1Store]: treesize reduction 226, result has 13.1 percent of original size [2021-10-13 00:22:58,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 84 [2021-10-13 00:22:59,336 INFO L354 Elim1Store]: treesize reduction 29, result has 21.6 percent of original size [2021-10-13 00:22:59,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 105 treesize of output 59 [2021-10-13 00:22:59,350 INFO L354 Elim1Store]: treesize reduction 62, result has 4.6 percent of original size [2021-10-13 00:22:59,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 36 [2021-10-13 00:22:59,367 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:22:59,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888482439] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:22:59,367 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:22:59,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 36 [2021-10-13 00:22:59,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97108930] [2021-10-13 00:22:59,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-10-13 00:22:59,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:22:59,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-10-13 00:22:59,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1198, Unknown=0, NotChecked=0, Total=1332 [2021-10-13 00:22:59,368 INFO L87 Difference]: Start difference. First operand 240 states and 263 transitions. Second operand has 37 states, 36 states have (on average 2.611111111111111) internal successors, (94), 36 states have internal predecessors, (94), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:23:03,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:23:03,835 INFO L93 Difference]: Finished difference Result 292 states and 317 transitions. [2021-10-13 00:23:03,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-13 00:23:03,836 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.611111111111111) internal successors, (94), 36 states have internal predecessors, (94), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2021-10-13 00:23:03,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:23:03,837 INFO L225 Difference]: With dead ends: 292 [2021-10-13 00:23:03,837 INFO L226 Difference]: Without dead ends: 292 [2021-10-13 00:23:03,838 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 3140.0ms TimeCoverageRelationStatistics Valid=338, Invalid=2417, Unknown=1, NotChecked=0, Total=2756 [2021-10-13 00:23:03,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-10-13 00:23:03,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 236. [2021-10-13 00:23:03,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 211 states have (on average 1.2037914691943128) internal successors, (254), 232 states have internal predecessors, (254), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:23:03,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 257 transitions. [2021-10-13 00:23:03,845 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 257 transitions. Word has length 52 [2021-10-13 00:23:03,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:23:03,845 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 257 transitions. [2021-10-13 00:23:03,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.611111111111111) internal successors, (94), 36 states have internal predecessors, (94), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:23:03,846 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 257 transitions. [2021-10-13 00:23:03,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-10-13 00:23:03,846 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:23:03,847 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:23:03,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-10-13 00:23:04,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:23:04,055 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting mainErr37ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 56 more)] === [2021-10-13 00:23:04,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:23:04,056 INFO L82 PathProgramCache]: Analyzing trace with hash -1228025836, now seen corresponding path program 1 times [2021-10-13 00:23:04,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:23:04,056 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340883218] [2021-10-13 00:23:04,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:23:04,056 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:23:04,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:23:04,103 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 00:23:04,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:23:04,169 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-13 00:23:04,170 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-13 00:23:04,171 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr37ASSERT_VIOLATIONMEMORY_LEAK [2021-10-13 00:23:04,172 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION [2021-10-13 00:23:04,173 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION [2021-10-13 00:23:04,173 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2REQUIRES_VIOLATION [2021-10-13 00:23:04,173 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3REQUIRES_VIOLATION [2021-10-13 00:23:04,173 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4REQUIRES_VIOLATION [2021-10-13 00:23:04,173 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr5REQUIRES_VIOLATION [2021-10-13 00:23:04,174 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr6REQUIRES_VIOLATION [2021-10-13 00:23:04,174 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr7REQUIRES_VIOLATION [2021-10-13 00:23:04,174 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr8REQUIRES_VIOLATION [2021-10-13 00:23:04,174 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr9REQUIRES_VIOLATION [2021-10-13 00:23:04,174 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr10REQUIRES_VIOLATION [2021-10-13 00:23:04,174 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr11REQUIRES_VIOLATION [2021-10-13 00:23:04,175 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr12REQUIRES_VIOLATION [2021-10-13 00:23:04,175 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr13REQUIRES_VIOLATION [2021-10-13 00:23:04,175 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr14REQUIRES_VIOLATION [2021-10-13 00:23:04,175 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr15REQUIRES_VIOLATION [2021-10-13 00:23:04,176 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr16REQUIRES_VIOLATION [2021-10-13 00:23:04,176 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr17REQUIRES_VIOLATION [2021-10-13 00:23:04,176 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr18REQUIRES_VIOLATION [2021-10-13 00:23:04,176 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr19REQUIRES_VIOLATION [2021-10-13 00:23:04,176 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr20REQUIRES_VIOLATION [2021-10-13 00:23:04,177 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr21REQUIRES_VIOLATION [2021-10-13 00:23:04,177 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr22REQUIRES_VIOLATION [2021-10-13 00:23:04,177 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr23REQUIRES_VIOLATION [2021-10-13 00:23:04,177 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr24REQUIRES_VIOLATION [2021-10-13 00:23:04,177 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr25REQUIRES_VIOLATION [2021-10-13 00:23:04,178 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr26ASSERT_VIOLATIONMEMORY_LEAK [2021-10-13 00:23:04,178 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr27REQUIRES_VIOLATION [2021-10-13 00:23:04,178 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr28REQUIRES_VIOLATION [2021-10-13 00:23:04,178 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr29ASSERT_VIOLATIONMEMORY_LEAK [2021-10-13 00:23:04,178 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr30REQUIRES_VIOLATION [2021-10-13 00:23:04,178 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr31REQUIRES_VIOLATION [2021-10-13 00:23:04,179 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr32REQUIRES_VIOLATION [2021-10-13 00:23:04,179 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr33REQUIRES_VIOLATION [2021-10-13 00:23:04,179 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr34ASSERT_VIOLATIONMEMORY_LEAK [2021-10-13 00:23:04,179 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr35REQUIRES_VIOLATION [2021-10-13 00:23:04,179 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr36REQUIRES_VIOLATION [2021-10-13 00:23:04,180 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr38REQUIRES_VIOLATION [2021-10-13 00:23:04,180 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr39REQUIRES_VIOLATION [2021-10-13 00:23:04,180 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr40REQUIRES_VIOLATION [2021-10-13 00:23:04,180 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr41REQUIRES_VIOLATION [2021-10-13 00:23:04,180 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr42REQUIRES_VIOLATION [2021-10-13 00:23:04,180 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr43REQUIRES_VIOLATION [2021-10-13 00:23:04,181 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr44ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 00:23:04,181 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr45ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 00:23:04,181 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr46ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 00:23:04,181 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr47REQUIRES_VIOLATION [2021-10-13 00:23:04,181 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr48REQUIRES_VIOLATION [2021-10-13 00:23:04,181 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr49ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 00:23:04,182 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr50ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 00:23:04,183 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr51ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 00:23:04,183 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr52REQUIRES_VIOLATION [2021-10-13 00:23:04,183 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr53REQUIRES_VIOLATION [2021-10-13 00:23:04,183 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr54ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 00:23:04,184 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr55ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 00:23:04,184 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr56ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 00:23:04,184 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr57ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 00:23:04,184 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr58ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 00:23:04,184 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr59ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 00:23:04,184 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr60ENSURES_VIOLATIONMEMORY_LEAK [2021-10-13 00:23:04,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-10-13 00:23:04,194 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 00:23:04,256 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 12:23:04 BoogieIcfgContainer [2021-10-13 00:23:04,257 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 00:23:04,257 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 00:23:04,257 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 00:23:04,257 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 00:23:04,258 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:19:17" (3/4) ... [2021-10-13 00:23:04,260 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-13 00:23:04,316 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/witness.graphml [2021-10-13 00:23:04,316 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 00:23:04,317 INFO L168 Benchmark]: Toolchain (without parser) took 228606.65 ms. Allocated memory was 109.1 MB in the beginning and 446.7 MB in the end (delta: 337.6 MB). Free memory was 74.1 MB in the beginning and 201.5 MB in the end (delta: -127.3 MB). Peak memory consumption was 209.8 MB. Max. memory is 16.1 GB. [2021-10-13 00:23:04,317 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 109.1 MB. Free memory is still 64.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 00:23:04,318 INFO L168 Benchmark]: CACSL2BoogieTranslator took 491.03 ms. Allocated memory was 109.1 MB in the beginning and 146.8 MB in the end (delta: 37.7 MB). Free memory was 73.9 MB in the beginning and 113.1 MB in the end (delta: -39.2 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-13 00:23:04,318 INFO L168 Benchmark]: Boogie Preprocessor took 63.44 ms. Allocated memory is still 146.8 MB. Free memory was 113.1 MB in the beginning and 110.3 MB in the end (delta: 2.8 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-13 00:23:04,318 INFO L168 Benchmark]: RCFGBuilder took 760.80 ms. Allocated memory is still 146.8 MB. Free memory was 109.6 MB in the beginning and 83.7 MB in the end (delta: 25.9 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. [2021-10-13 00:23:04,319 INFO L168 Benchmark]: TraceAbstraction took 227226.54 ms. Allocated memory was 146.8 MB in the beginning and 446.7 MB in the end (delta: 299.9 MB). Free memory was 83.0 MB in the beginning and 204.6 MB in the end (delta: -121.6 MB). Peak memory consumption was 179.0 MB. Max. memory is 16.1 GB. [2021-10-13 00:23:04,319 INFO L168 Benchmark]: Witness Printer took 59.48 ms. Allocated memory is still 446.7 MB. Free memory was 204.6 MB in the beginning and 201.5 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-13 00:23:04,328 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 109.1 MB. Free memory is still 64.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 491.03 ms. Allocated memory was 109.1 MB in the beginning and 146.8 MB in the end (delta: 37.7 MB). Free memory was 73.9 MB in the beginning and 113.1 MB in the end (delta: -39.2 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 63.44 ms. Allocated memory is still 146.8 MB. Free memory was 113.1 MB in the beginning and 110.3 MB in the end (delta: 2.8 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 760.80 ms. Allocated memory is still 146.8 MB. Free memory was 109.6 MB in the beginning and 83.7 MB in the end (delta: 25.9 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 227226.54 ms. Allocated memory was 146.8 MB in the beginning and 446.7 MB in the end (delta: 299.9 MB). Free memory was 83.0 MB in the beginning and 204.6 MB in the end (delta: -121.6 MB). Peak memory consumption was 179.0 MB. Max. memory is 16.1 GB. * Witness Printer took 59.48 ms. Allocated memory is still 446.7 MB. Free memory was 204.6 MB in the beginning and 201.5 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 1050]: not all allocated memory was freed not all allocated memory was freed We found a FailurePath: [L1005] SLL* null = malloc(sizeof(SLL)); [L1006] null->colour = BLACK VAL [null={-1:0}] [L1007] null->next = ((void*)0) VAL [null={-1:0}] [L1009] SLL* list = malloc(sizeof(SLL)); [L1010] list->next = null VAL [list={-2:0}, null={-1:0}] [L1011] list->colour = BLACK VAL [list={-2:0}, null={-1:0}] [L1013] SLL* end = list; VAL [end={-2:0}, list={-2:0}, null={-1:0}] [L1016] COND TRUE __VERIFIER_nondet_int() [L1019] end->next = malloc(sizeof(SLL)) VAL [end={-2:0}, list={-2:0}, malloc(sizeof(SLL))={-3:0}, null={-1:0}] [L1020] EXPR end->next VAL [end={-2:0}, end->next={-3:0}, list={-2:0}, null={-1:0}] [L1020] end = end->next [L1021] end->next = null VAL [end={-3:0}, list={-2:0}, null={-1:0}] [L1023] COND FALSE !(__VERIFIER_nondet_int()) [L1029] end->colour = RED VAL [end={-3:0}, list={-2:0}, null={-1:0}] [L1030] end->next = malloc(sizeof(SLL)) VAL [end={-3:0}, list={-2:0}, malloc(sizeof(SLL))={-4:0}, null={-1:0}] [L1031] EXPR end->next VAL [end={-3:0}, end->next={-4:0}, list={-2:0}, null={-1:0}] [L1031] end = end->next [L1032] end->next = null VAL [end={-4:0}, list={-2:0}, null={-1:0}] [L1033] end->colour = BLACK VAL [end={-4:0}, list={-2:0}, null={-1:0}] [L1016] COND FALSE !(__VERIFIER_nondet_int()) [L1037] end = null [L1038] end = list VAL [end={-2:0}, list={-2:0}, null={-1:0}] [L1041] COND FALSE !(!(null != end)) VAL [end={-2:0}, list={-2:0}, null={-1:0}] [L1042] EXPR end->colour VAL [end={-2:0}, end->colour=1, list={-2:0}, null={-1:0}] [L1042] COND FALSE !(!(BLACK == end->colour)) [L1044] COND TRUE null != end VAL [end={-2:0}, list={-2:0}, null={-1:0}] [L1046] EXPR end->colour VAL [end={-2:0}, end->colour=1, list={-2:0}, null={-1:0}] [L1046] COND FALSE !(RED == end->colour) [L1053] EXPR end->next VAL [end={-2:0}, end->next={-3:0}, list={-2:0}, null={-1:0}] [L1053] end = end->next [L1044] COND TRUE null != end VAL [end={-3:0}, list={-2:0}, null={-1:0}] [L1046] EXPR end->colour VAL [end={-3:0}, end->colour=0, list={-2:0}, null={-1:0}] [L1046] COND TRUE RED == end->colour [L1048] EXPR end->next VAL [end={-3:0}, end->next={-4:0}, list={-2:0}, null={-1:0}] [L1048] end = end->next [L1049] COND FALSE !(!(null != end)) VAL [end={-4:0}, list={-2:0}, null={-1:0}] [L1050] EXPR end->colour VAL [end={-4:0}, end->colour=1, list={-2:0}, null={-1:0}] [L1050] COND TRUE !(BLACK != end->colour) [L1050] reach_error() VAL [end={-4:0}, list={-2:0}, null={-1:0}] - UnprovableResult [Line: 1006]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1006]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1007]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1007]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1010]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1010]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1011]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1011]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1019]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1019]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1020]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1020]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1021]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1021]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1025]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1025]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1029]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1029]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1030]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1030]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1031]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1031]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1032]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1032]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1033]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1033]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1041]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1042]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1042]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1042]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1046]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1046]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1048]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1048]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1049]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1050]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1050]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1053]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1053]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1059]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1059]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1061]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1061]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1062]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1062]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1062]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1063]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1063]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1064]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1064]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1064]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1068]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1068]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1069]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1069]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1069]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1074]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1074]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1074]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1003]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 141 locations, 61 error locations. Started 1 CEGAR loops. OverallTime: 227107.1ms, OverallIterations: 45, TraceHistogramMax: 3, EmptinessCheckTime: 53.0ms, AutomataDifference: 134850.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 13.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 3085 SDtfs, 13236 SDslu, 22184 SDs, 0 SdLazy, 51427 SolverSat, 2673 SolverUnsat, 44 SolverUnknown, 0 SolverNotchecked, 94408.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2452 GetRequests, 984 SyntacticMatches, 37 SemanticMatches, 1431 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17797 ImplicationChecksByTransitivity, 61700.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=240occurred in iteration=43, InterpolantAutomatonStates: 855, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 285.5ms AutomataMinimizationTime, 44 MinimizatonAttempts, 1696 StatesRemovedByMinimization, 40 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 345.1ms SsaConstructionTime, 1559.5ms SatisfiabilityAnalysisTime, 60257.9ms InterpolantComputationTime, 2896 NumberOfCodeBlocks, 2870 NumberOfCodeBlocksAsserted, 84 NumberOfCheckSat, 2771 ConstructedInterpolants, 321 QuantifiedInterpolants, 64121 SizeOfPredicates, 427 NumberOfNonLiveVariables, 6768 ConjunctsInSsa, 1237 ConjunctsInUnsatCore, 73 InterpolantComputations, 17 PerfectInterpolantSequences, 36/483 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-13 00:23:04,563 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2021-10-13 00:23:04,578 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2924907f-7e4b-4a89-b0d4-16ea89e2e7b6/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 Received shutdown request...