./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety/test-0019-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3a7c32-669a-499f-8105-f9a949c8a828/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3a7c32-669a-499f-8105-f9a949c8a828/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3a7c32-669a-499f-8105-f9a949c8a828/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3a7c32-669a-499f-8105-f9a949c8a828/bin/utaipan-q2qaUkNPG8/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/test-0019-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3a7c32-669a-499f-8105-f9a949c8a828/bin/utaipan-q2qaUkNPG8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3a7c32-669a-499f-8105-f9a949c8a828/bin/utaipan-q2qaUkNPG8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e0c6505355e23ab050a0b1754726876dca60bcf4 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3a7c32-669a-499f-8105-f9a949c8a828/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3a7c32-669a-499f-8105-f9a949c8a828/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3a7c32-669a-499f-8105-f9a949c8a828/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3a7c32-669a-499f-8105-f9a949c8a828/bin/utaipan-q2qaUkNPG8/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/test-0019-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3a7c32-669a-499f-8105-f9a949c8a828/bin/utaipan-q2qaUkNPG8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3a7c32-669a-499f-8105-f9a949c8a828/bin/utaipan-q2qaUkNPG8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e0c6505355e23ab050a0b1754726876dca60bcf4 ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 07:17:18,343 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:17:18,345 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:17:18,391 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:17:18,391 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:17:18,395 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:17:18,397 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:17:18,401 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:17:18,403 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:17:18,409 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:17:18,410 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:17:18,412 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:17:18,412 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:17:18,415 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:17:18,418 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:17:18,419 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:17:18,420 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:17:18,421 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:17:18,423 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:17:18,425 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:17:18,427 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:17:18,428 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:17:18,429 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:17:18,430 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:17:18,434 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:17:18,434 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:17:18,434 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:17:18,435 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:17:18,436 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:17:18,437 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:17:18,438 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:17:18,438 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:17:18,439 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:17:18,440 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:17:18,441 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:17:18,442 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:17:18,443 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:17:18,443 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:17:18,443 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:17:18,445 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:17:18,445 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:17:18,446 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3a7c32-669a-499f-8105-f9a949c8a828/bin/utaipan-q2qaUkNPG8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-10-13 07:17:18,471 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:17:18,471 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:17:18,472 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:17:18,472 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:17:18,472 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:17:18,473 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:17:18,473 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-13 07:17:18,473 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:17:18,473 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:17:18,473 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-13 07:17:18,474 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-13 07:17:18,474 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:17:18,474 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-13 07:17:18,474 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-13 07:17:18,475 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-13 07:17:18,475 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 07:17:18,475 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 07:17:18,476 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:17:18,476 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:17:18,476 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-13 07:17:18,476 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 07:17:18,477 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:17:18,477 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:17:18,477 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-13 07:17:18,477 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-13 07:17:18,477 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-13 07:17:18,478 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:17:18,478 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:17:18,478 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:17:18,478 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:17:18,479 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:17:18,479 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:17:18,479 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:17:18,479 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:17:18,479 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:17:18,480 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-13 07:17:18,480 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 07:17:18,480 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:17:18,480 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:17:18,481 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3a7c32-669a-499f-8105-f9a949c8a828/bin/utaipan-q2qaUkNPG8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3a7c32-669a-499f-8105-f9a949c8a828/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e0c6505355e23ab050a0b1754726876dca60bcf4 [2021-10-13 07:17:18,733 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:17:18,754 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:17:18,757 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:17:18,758 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:17:18,759 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:17:18,760 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3a7c32-669a-499f-8105-f9a949c8a828/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/memsafety/test-0019-2.i [2021-10-13 07:17:18,830 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3a7c32-669a-499f-8105-f9a949c8a828/bin/utaipan-q2qaUkNPG8/data/8b7c24bea/c74be9b065de40f7bf2e024959a614f1/FLAGe3c6d30ed [2021-10-13 07:17:19,304 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:17:19,305 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3a7c32-669a-499f-8105-f9a949c8a828/sv-benchmarks/c/memsafety/test-0019-2.i [2021-10-13 07:17:19,320 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3a7c32-669a-499f-8105-f9a949c8a828/bin/utaipan-q2qaUkNPG8/data/8b7c24bea/c74be9b065de40f7bf2e024959a614f1/FLAGe3c6d30ed [2021-10-13 07:17:19,650 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3a7c32-669a-499f-8105-f9a949c8a828/bin/utaipan-q2qaUkNPG8/data/8b7c24bea/c74be9b065de40f7bf2e024959a614f1 [2021-10-13 07:17:19,652 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:17:19,654 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:17:19,655 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:17:19,656 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:17:19,659 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:17:19,660 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:17:19" (1/1) ... [2021-10-13 07:17:19,661 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@691b3508 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:19, skipping insertion in model container [2021-10-13 07:17:19,661 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:17:19" (1/1) ... [2021-10-13 07:17:19,668 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:17:19,711 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:17:19,995 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:17:20,009 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:17:20,096 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:17:20,130 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:17:20,131 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:20 WrapperNode [2021-10-13 07:17:20,131 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:17:20,132 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:17:20,133 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:17:20,133 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:17:20,141 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:20" (1/1) ... [2021-10-13 07:17:20,177 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:20" (1/1) ... [2021-10-13 07:17:20,197 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:17:20,198 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:17:20,198 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:17:20,199 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:17:20,206 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:20" (1/1) ... [2021-10-13 07:17:20,207 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:20" (1/1) ... [2021-10-13 07:17:20,209 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:20" (1/1) ... [2021-10-13 07:17:20,210 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:20" (1/1) ... [2021-10-13 07:17:20,216 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:20" (1/1) ... [2021-10-13 07:17:20,218 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:20" (1/1) ... [2021-10-13 07:17:20,219 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:20" (1/1) ... [2021-10-13 07:17:20,222 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:17:20,223 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:17:20,223 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:17:20,223 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:17:20,228 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:20" (1/1) ... [2021-10-13 07:17:20,237 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:17:20,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3a7c32-669a-499f-8105-f9a949c8a828/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:17:20,262 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3a7c32-669a-499f-8105-f9a949c8a828/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:17:20,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3a7c32-669a-499f-8105-f9a949c8a828/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:17:20,316 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 07:17:20,316 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-13 07:17:20,316 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:17:20,316 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-13 07:17:20,317 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 07:17:20,318 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 07:17:20,318 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:17:20,318 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:17:20,786 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:17:20,786 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-10-13 07:17:20,788 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:17:20 BoogieIcfgContainer [2021-10-13 07:17:20,789 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:17:20,791 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:17:20,791 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:17:20,794 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:17:20,795 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:17:19" (1/3) ... [2021-10-13 07:17:20,795 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60d20cae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:17:20, skipping insertion in model container [2021-10-13 07:17:20,796 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:20" (2/3) ... [2021-10-13 07:17:20,796 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60d20cae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:17:20, skipping insertion in model container [2021-10-13 07:17:20,796 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:17:20" (3/3) ... [2021-10-13 07:17:20,798 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0019-2.i [2021-10-13 07:17:20,803 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:17:20,804 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 19 error locations. [2021-10-13 07:17:20,849 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:17:20,855 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 07:17:20,855 INFO L340 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2021-10-13 07:17:20,870 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 34 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:17:20,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-13 07:17:20,876 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:17:20,877 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-13 07:17:20,878 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-13 07:17:20,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:17:20,884 INFO L82 PathProgramCache]: Analyzing trace with hash 2732, now seen corresponding path program 1 times [2021-10-13 07:17:20,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:17:20,894 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567869044] [2021-10-13 07:17:20,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:17:20,896 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:17:20,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:17:21,080 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 07:17:21,081 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:17:21,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567869044] [2021-10-13 07:17:21,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567869044] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:17:21,082 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:17:21,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-13 07:17:21,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730897528] [2021-10-13 07:17:21,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:17:21,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:17:21,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:17:21,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:17:21,105 INFO L87 Difference]: Start difference. First operand has 35 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 34 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:17:21,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:17:21,168 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2021-10-13 07:17:21,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:17:21,170 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2021-10-13 07:17:21,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:17:21,178 INFO L225 Difference]: With dead ends: 39 [2021-10-13 07:17:21,178 INFO L226 Difference]: Without dead ends: 38 [2021-10-13 07:17:21,180 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:17:21,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-10-13 07:17:21,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 32. [2021-10-13 07:17:21,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 31 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:17:21,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2021-10-13 07:17:21,215 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 2 [2021-10-13 07:17:21,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:17:21,215 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2021-10-13 07:17:21,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:17:21,216 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2021-10-13 07:17:21,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-13 07:17:21,216 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:17:21,216 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-13 07:17:21,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 07:17:21,217 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-13 07:17:21,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:17:21,218 INFO L82 PathProgramCache]: Analyzing trace with hash 2733, now seen corresponding path program 1 times [2021-10-13 07:17:21,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:17:21,219 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202980923] [2021-10-13 07:17:21,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:17:21,219 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:17:21,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:17:21,278 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 07:17:21,278 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:17:21,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202980923] [2021-10-13 07:17:21,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202980923] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:17:21,279 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:17:21,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-13 07:17:21,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211509621] [2021-10-13 07:17:21,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:17:21,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:17:21,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:17:21,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:17:21,283 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:17:21,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:17:21,306 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2021-10-13 07:17:21,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:17:21,307 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2021-10-13 07:17:21,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:17:21,308 INFO L225 Difference]: With dead ends: 30 [2021-10-13 07:17:21,308 INFO L226 Difference]: Without dead ends: 30 [2021-10-13 07:17:21,309 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:17:21,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-10-13 07:17:21,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-10-13 07:17:21,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 15 states have (on average 2.0) internal successors, (30), 29 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:17:21,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2021-10-13 07:17:21,313 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 2 [2021-10-13 07:17:21,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:17:21,313 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2021-10-13 07:17:21,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:17:21,314 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2021-10-13 07:17:21,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-13 07:17:21,314 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:17:21,315 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-13 07:17:21,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-13 07:17:21,315 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-13 07:17:21,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:17:21,316 INFO L82 PathProgramCache]: Analyzing trace with hash 2677112, now seen corresponding path program 1 times [2021-10-13 07:17:21,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:17:21,318 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603046750] [2021-10-13 07:17:21,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:17:21,319 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:17:21,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:17:21,377 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 07:17:21,378 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:17:21,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603046750] [2021-10-13 07:17:21,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603046750] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:17:21,379 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:17:21,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 07:17:21,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94207320] [2021-10-13 07:17:21,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:17:21,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:17:21,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:17:21,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:17:21,382 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:17:21,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:17:21,431 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2021-10-13 07:17:21,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:17:21,432 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-10-13 07:17:21,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:17:21,433 INFO L225 Difference]: With dead ends: 29 [2021-10-13 07:17:21,433 INFO L226 Difference]: Without dead ends: 29 [2021-10-13 07:17:21,434 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:17:21,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-10-13 07:17:21,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2021-10-13 07:17:21,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 16 states have (on average 1.8125) internal successors, (29), 27 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:17:21,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2021-10-13 07:17:21,439 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 4 [2021-10-13 07:17:21,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:17:21,439 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2021-10-13 07:17:21,439 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:17:21,440 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2021-10-13 07:17:21,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-13 07:17:21,440 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:17:21,440 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-13 07:17:21,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-13 07:17:21,441 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-13 07:17:21,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:17:21,442 INFO L82 PathProgramCache]: Analyzing trace with hash 2677113, now seen corresponding path program 1 times [2021-10-13 07:17:21,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:17:21,442 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150156363] [2021-10-13 07:17:21,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:17:21,443 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:17:21,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:17:21,522 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 07:17:21,523 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:17:21,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150156363] [2021-10-13 07:17:21,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150156363] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:17:21,523 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:17:21,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 07:17:21,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493978279] [2021-10-13 07:17:21,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:17:21,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:17:21,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:17:21,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:17:21,526 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:17:21,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:17:21,560 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2021-10-13 07:17:21,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 07:17:21,561 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-10-13 07:17:21,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:17:21,562 INFO L225 Difference]: With dead ends: 24 [2021-10-13 07:17:21,562 INFO L226 Difference]: Without dead ends: 24 [2021-10-13 07:17:21,562 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:17:21,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-10-13 07:17:21,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-10-13 07:17:21,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.5) internal successors, (24), 23 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:17:21,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2021-10-13 07:17:21,566 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 4 [2021-10-13 07:17:21,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:17:21,566 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2021-10-13 07:17:21,567 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:17:21,567 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2021-10-13 07:17:21,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-13 07:17:21,567 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:17:21,567 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:17:21,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-13 07:17:21,568 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-13 07:17:21,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:17:21,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1849323435, now seen corresponding path program 1 times [2021-10-13 07:17:21,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:17:21,569 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329596887] [2021-10-13 07:17:21,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:17:21,570 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:17:21,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:17:21,673 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 07:17:21,673 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:17:21,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329596887] [2021-10-13 07:17:21,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329596887] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:17:21,674 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:17:21,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 07:17:21,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931662888] [2021-10-13 07:17:21,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 07:17:21,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:17:21,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 07:17:21,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-13 07:17:21,677 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:17:21,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:17:21,742 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2021-10-13 07:17:21,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 07:17:21,743 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-13 07:17:21,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:17:21,744 INFO L225 Difference]: With dead ends: 23 [2021-10-13 07:17:21,744 INFO L226 Difference]: Without dead ends: 23 [2021-10-13 07:17:21,745 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 52.9ms TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-10-13 07:17:21,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-10-13 07:17:21,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-10-13 07:17:21,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.4375) internal successors, (23), 22 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:17:21,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2021-10-13 07:17:21,748 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 7 [2021-10-13 07:17:21,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:17:21,748 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2021-10-13 07:17:21,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:17:21,749 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2021-10-13 07:17:21,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-13 07:17:21,750 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:17:21,750 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:17:21,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-13 07:17:21,750 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-13 07:17:21,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:17:21,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1494451580, now seen corresponding path program 1 times [2021-10-13 07:17:21,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:17:21,752 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326458170] [2021-10-13 07:17:21,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:17:21,752 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:17:21,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:17:21,903 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 07:17:21,904 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:17:21,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326458170] [2021-10-13 07:17:21,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326458170] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:17:21,905 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:17:21,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 07:17:21,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045274274] [2021-10-13 07:17:21,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 07:17:21,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:17:21,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 07:17:21,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-13 07:17:21,916 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:17:22,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:17:22,014 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2021-10-13 07:17:22,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 07:17:22,016 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-13 07:17:22,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:17:22,017 INFO L225 Difference]: With dead ends: 22 [2021-10-13 07:17:22,017 INFO L226 Difference]: Without dead ends: 22 [2021-10-13 07:17:22,019 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 56.3ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-13 07:17:22,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-10-13 07:17:22,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-10-13 07:17:22,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 16 states have (on average 1.375) internal successors, (22), 21 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:17:22,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2021-10-13 07:17:22,025 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 8 [2021-10-13 07:17:22,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:17:22,026 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2021-10-13 07:17:22,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:17:22,026 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2021-10-13 07:17:22,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-13 07:17:22,027 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:17:22,027 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:17:22,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-13 07:17:22,028 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-13 07:17:22,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:17:22,028 INFO L82 PathProgramCache]: Analyzing trace with hash 917072751, now seen corresponding path program 1 times [2021-10-13 07:17:22,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:17:22,030 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101503747] [2021-10-13 07:17:22,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:17:22,034 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:17:22,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 07:17:22,094 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 07:17:22,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 07:17:22,141 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-13 07:17:22,142 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-13 07:17:22,143 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK [2021-10-13 07:17:22,145 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATION [2021-10-13 07:17:22,145 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATION [2021-10-13 07:17:22,145 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATION [2021-10-13 07:17:22,146 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATION [2021-10-13 07:17:22,146 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATION [2021-10-13 07:17:22,146 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATION [2021-10-13 07:17:22,146 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATION [2021-10-13 07:17:22,147 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATION [2021-10-13 07:17:22,147 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 07:17:22,147 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 07:17:22,147 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 07:17:22,148 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 07:17:22,148 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 07:17:22,148 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 07:17:22,148 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATION [2021-10-13 07:17:22,149 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15REQUIRES_VIOLATION [2021-10-13 07:17:22,149 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16REQUIRES_VIOLATION [2021-10-13 07:17:22,149 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr17REQUIRES_VIOLATION [2021-10-13 07:17:22,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-13 07:17:22,155 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 07:17:22,176 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 07:17:22 BoogieIcfgContainer [2021-10-13 07:17:22,176 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 07:17:22,177 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 07:17:22,177 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 07:17:22,177 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 07:17:22,178 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:17:20" (3/4) ... [2021-10-13 07:17:22,181 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-13 07:17:22,181 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 07:17:22,182 INFO L168 Benchmark]: Toolchain (without parser) took 2527.88 ms. Allocated memory is still 125.8 MB. Free memory was 92.6 MB in the beginning and 89.6 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 16.1 GB. [2021-10-13 07:17:22,183 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 86.0 MB. Free memory is still 44.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:17:22,183 INFO L168 Benchmark]: CACSL2BoogieTranslator took 476.22 ms. Allocated memory is still 125.8 MB. Free memory was 92.3 MB in the beginning and 94.6 MB in the end (delta: -2.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-13 07:17:22,184 INFO L168 Benchmark]: Boogie Procedure Inliner took 65.18 ms. Allocated memory is still 125.8 MB. Free memory was 94.6 MB in the beginning and 92.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:17:22,184 INFO L168 Benchmark]: Boogie Preprocessor took 23.77 ms. Allocated memory is still 125.8 MB. Free memory was 92.9 MB in the beginning and 91.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:17:22,185 INFO L168 Benchmark]: RCFGBuilder took 566.27 ms. Allocated memory is still 125.8 MB. Free memory was 91.3 MB in the beginning and 76.6 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-13 07:17:22,185 INFO L168 Benchmark]: TraceAbstraction took 1385.45 ms. Allocated memory is still 125.8 MB. Free memory was 76.2 MB in the beginning and 90.5 MB in the end (delta: -14.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:17:22,186 INFO L168 Benchmark]: Witness Printer took 4.35 ms. Allocated memory is still 125.8 MB. Free memory is still 89.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:17:22,188 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 86.0 MB. Free memory is still 44.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 476.22 ms. Allocated memory is still 125.8 MB. Free memory was 92.3 MB in the beginning and 94.6 MB in the end (delta: -2.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 65.18 ms. Allocated memory is still 125.8 MB. Free memory was 94.6 MB in the beginning and 92.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 23.77 ms. Allocated memory is still 125.8 MB. Free memory was 92.9 MB in the beginning and 91.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 566.27 ms. Allocated memory is still 125.8 MB. Free memory was 91.3 MB in the beginning and 76.6 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1385.45 ms. Allocated memory is still 125.8 MB. Free memory was 76.2 MB in the beginning and 90.5 MB in the end (delta: -14.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 4.35 ms. Allocated memory is still 125.8 MB. Free memory is still 89.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 543]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 543. Possible FailurePath: [L544] TData data; [L529] pdata->lo = malloc(16) [L530] pdata->hi = malloc(24) [L534] EXPR data->lo [L534] void *lo = data->lo; [L535] EXPR data->hi [L535] void *hi = data->hi; [L536] COND FALSE !(lo == hi) [L540] data->lo = (void *) 0 [L541] data->hi = (void *) 0 [L547] return 0; [L547] return 0; - UnprovableResult [Line: 529]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 529]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 530]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 530]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 534]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 534]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 535]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 535]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 537]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 537]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 537]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 538]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 538]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 538]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 540]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 540]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 541]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 541]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 35 locations, 19 error locations. Started 1 CEGAR loops. OverallTime: 1306.6ms, OverallIterations: 7, TraceHistogramMax: 1, EmptinessCheckTime: 13.4ms, AutomataDifference: 383.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 10.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 90 SDtfs, 215 SDslu, 34 SDs, 0 SdLazy, 127 SolverSat, 21 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 176.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 21 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 152.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=35occurred in iteration=0, InterpolantAutomatonStates: 29, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 37.2ms AutomataMinimizationTime, 6 MinimizatonAttempts, 7 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 23.8ms SsaConstructionTime, 173.3ms SatisfiabilityAnalysisTime, 393.4ms InterpolantComputationTime, 36 NumberOfCodeBlocks, 36 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 21 ConstructedInterpolants, 0 QuantifiedInterpolants, 161 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-10-13 07:17:22,233 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3a7c32-669a-499f-8105-f9a949c8a828/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 07:17:24,643 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:17:24,646 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:17:24,700 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:17:24,701 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:17:24,706 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:17:24,708 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:17:24,715 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:17:24,718 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:17:24,729 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:17:24,730 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:17:24,732 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:17:24,732 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:17:24,733 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:17:24,735 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:17:24,737 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:17:24,738 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:17:24,739 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:17:24,741 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:17:24,743 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:17:24,745 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:17:24,746 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:17:24,748 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:17:24,749 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:17:24,752 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:17:24,752 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:17:24,753 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:17:24,754 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:17:24,755 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:17:24,756 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:17:24,756 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:17:24,757 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:17:24,758 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:17:24,759 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:17:24,760 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:17:24,760 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:17:24,761 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:17:24,761 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:17:24,777 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:17:24,778 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:17:24,778 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:17:24,783 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3a7c32-669a-499f-8105-f9a949c8a828/bin/utaipan-q2qaUkNPG8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-10-13 07:17:24,830 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:17:24,830 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:17:24,832 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:17:24,832 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:17:24,832 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:17:24,832 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:17:24,832 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:17:24,833 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:17:24,833 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:17:24,834 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 07:17:24,835 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 07:17:24,836 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:17:24,836 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:17:24,836 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-13 07:17:24,836 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 07:17:24,836 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:17:24,837 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:17:24,837 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-13 07:17:24,837 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-13 07:17:24,837 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-13 07:17:24,837 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:17:24,837 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:17:24,838 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 07:17:24,838 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 07:17:24,838 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:17:24,838 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:17:24,838 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:17:24,839 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 07:17:24,839 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:17:24,839 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:17:24,839 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:17:24,839 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:17:24,840 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-13 07:17:24,840 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 07:17:24,840 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:17:24,841 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:17:24,841 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3a7c32-669a-499f-8105-f9a949c8a828/bin/utaipan-q2qaUkNPG8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3a7c32-669a-499f-8105-f9a949c8a828/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e0c6505355e23ab050a0b1754726876dca60bcf4 [2021-10-13 07:17:25,215 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:17:25,255 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:17:25,258 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:17:25,260 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:17:25,260 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:17:25,261 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3a7c32-669a-499f-8105-f9a949c8a828/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/memsafety/test-0019-2.i [2021-10-13 07:17:25,344 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3a7c32-669a-499f-8105-f9a949c8a828/bin/utaipan-q2qaUkNPG8/data/29aed2acb/2e9ea247cf364df7aba32bd203546379/FLAG05e05f332 [2021-10-13 07:17:25,944 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:17:25,945 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3a7c32-669a-499f-8105-f9a949c8a828/sv-benchmarks/c/memsafety/test-0019-2.i [2021-10-13 07:17:25,962 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3a7c32-669a-499f-8105-f9a949c8a828/bin/utaipan-q2qaUkNPG8/data/29aed2acb/2e9ea247cf364df7aba32bd203546379/FLAG05e05f332 [2021-10-13 07:17:26,193 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3a7c32-669a-499f-8105-f9a949c8a828/bin/utaipan-q2qaUkNPG8/data/29aed2acb/2e9ea247cf364df7aba32bd203546379 [2021-10-13 07:17:26,197 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:17:26,198 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:17:26,199 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:17:26,199 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:17:26,203 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:17:26,204 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:17:26" (1/1) ... [2021-10-13 07:17:26,205 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38db7cc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:26, skipping insertion in model container [2021-10-13 07:17:26,205 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:17:26" (1/1) ... [2021-10-13 07:17:26,212 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:17:26,252 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:17:26,551 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:17:26,574 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:17:26,623 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:17:26,663 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:17:26,663 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:26 WrapperNode [2021-10-13 07:17:26,664 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:17:26,665 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:17:26,666 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:17:26,666 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:17:26,673 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:26" (1/1) ... [2021-10-13 07:17:26,701 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:26" (1/1) ... [2021-10-13 07:17:26,721 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:17:26,722 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:17:26,722 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:17:26,722 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:17:26,730 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:26" (1/1) ... [2021-10-13 07:17:26,730 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:26" (1/1) ... [2021-10-13 07:17:26,734 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:26" (1/1) ... [2021-10-13 07:17:26,735 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:26" (1/1) ... [2021-10-13 07:17:26,744 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:26" (1/1) ... [2021-10-13 07:17:26,748 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:26" (1/1) ... [2021-10-13 07:17:26,750 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:26" (1/1) ... [2021-10-13 07:17:26,759 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:17:26,763 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:17:26,767 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:17:26,767 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:17:26,768 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:26" (1/1) ... [2021-10-13 07:17:26,775 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:17:26,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3a7c32-669a-499f-8105-f9a949c8a828/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:17:26,806 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3a7c32-669a-499f-8105-f9a949c8a828/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:17:26,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3a7c32-669a-499f-8105-f9a949c8a828/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:17:26,843 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 07:17:26,844 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-13 07:17:26,844 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:17:26,844 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-13 07:17:26,844 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 07:17:26,845 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 07:17:26,845 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:17:26,845 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:17:27,232 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:17:27,233 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-10-13 07:17:27,235 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:17:27 BoogieIcfgContainer [2021-10-13 07:17:27,235 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:17:27,237 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:17:27,237 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:17:27,240 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:17:27,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:17:26" (1/3) ... [2021-10-13 07:17:27,241 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48589c76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:17:27, skipping insertion in model container [2021-10-13 07:17:27,241 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:26" (2/3) ... [2021-10-13 07:17:27,241 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48589c76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:17:27, skipping insertion in model container [2021-10-13 07:17:27,241 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:17:27" (3/3) ... [2021-10-13 07:17:27,243 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0019-2.i [2021-10-13 07:17:27,248 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:17:27,248 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 19 error locations. [2021-10-13 07:17:27,299 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:17:27,309 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 07:17:27,309 INFO L340 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2021-10-13 07:17:27,325 INFO L276 IsEmpty]: Start isEmpty. Operand has 43 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 42 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:17:27,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-13 07:17:27,332 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:17:27,333 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-13 07:17:27,333 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-13 07:17:27,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:17:27,353 INFO L82 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2021-10-13 07:17:27,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:17:27,367 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [802201591] [2021-10-13 07:17:27,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:17:27,368 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:17:27,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3a7c32-669a-499f-8105-f9a949c8a828/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:17:27,373 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3a7c32-669a-499f-8105-f9a949c8a828/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:17:27,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3a7c32-669a-499f-8105-f9a949c8a828/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 07:17:27,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:17:27,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 07:17:27,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:17:27,599 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-10-13 07:17:27,600 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 1 case distinctions, treesize of input 9 treesize of output 14 [2021-10-13 07:17:27,655 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 07:17:27,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:17:27,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:17:27,698 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:17:27,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [802201591] [2021-10-13 07:17:27,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [802201591] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:17:27,699 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:17:27,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-13 07:17:27,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375299890] [2021-10-13 07:17:27,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:17:27,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:17:27,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:17:27,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:17:27,754 INFO L87 Difference]: Start difference. First operand has 43 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 42 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:17:27,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:17:27,884 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2021-10-13 07:17:27,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:17:27,885 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-10-13 07:17:27,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:17:27,896 INFO L225 Difference]: With dead ends: 48 [2021-10-13 07:17:27,896 INFO L226 Difference]: Without dead ends: 46 [2021-10-13 07:17:27,898 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:17:27,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-10-13 07:17:27,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 39. [2021-10-13 07:17:27,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 38 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:17:27,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2021-10-13 07:17:27,935 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 3 [2021-10-13 07:17:27,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:17:27,936 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2021-10-13 07:17:27,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:17:27,937 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2021-10-13 07:17:27,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-13 07:17:27,938 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:17:27,938 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-13 07:17:27,954 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3a7c32-669a-499f-8105-f9a949c8a828/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-13 07:17:28,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3a7c32-669a-499f-8105-f9a949c8a828/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:17:28,150 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-13 07:17:28,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:17:28,151 INFO L82 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2021-10-13 07:17:28,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:17:28,152 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [810076838] [2021-10-13 07:17:28,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:17:28,153 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:17:28,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3a7c32-669a-499f-8105-f9a949c8a828/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:17:28,158 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3a7c32-669a-499f-8105-f9a949c8a828/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:17:28,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3a7c32-669a-499f-8105-f9a949c8a828/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 07:17:28,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:17:28,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 07:17:28,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:17:28,324 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-13 07:17:28,326 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 1 case distinctions, treesize of input 20 treesize of output 21 [2021-10-13 07:17:28,341 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 22 treesize of output 20 [2021-10-13 07:17:28,388 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 07:17:28,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:17:28,460 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 07:17:28,460 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:17:28,461 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [810076838] [2021-10-13 07:17:28,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [810076838] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:17:28,461 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:17:28,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-10-13 07:17:28,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660909499] [2021-10-13 07:17:28,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:17:28,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:17:28,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:17:28,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:17:28,465 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:17:28,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:17:28,629 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2021-10-13 07:17:28,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:17:28,630 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-10-13 07:17:28,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:17:28,631 INFO L225 Difference]: With dead ends: 38 [2021-10-13 07:17:28,631 INFO L226 Difference]: Without dead ends: 38 [2021-10-13 07:17:28,632 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.1ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:17:28,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-10-13 07:17:28,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-10-13 07:17:28,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 37 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:17:28,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2021-10-13 07:17:28,637 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 3 [2021-10-13 07:17:28,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:17:28,638 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2021-10-13 07:17:28,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:17:28,638 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2021-10-13 07:17:28,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-13 07:17:28,639 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:17:28,639 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-13 07:17:28,661 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3a7c32-669a-499f-8105-f9a949c8a828/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-13 07:17:28,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3a7c32-669a-499f-8105-f9a949c8a828/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:17:28,850 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-13 07:17:28,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:17:28,850 INFO L82 PathProgramCache]: Analyzing trace with hash 28691811, now seen corresponding path program 1 times [2021-10-13 07:17:28,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:17:28,851 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [728149167] [2021-10-13 07:17:28,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:17:28,852 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:17:28,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3a7c32-669a-499f-8105-f9a949c8a828/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:17:28,857 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3a7c32-669a-499f-8105-f9a949c8a828/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:17:28,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3a7c32-669a-499f-8105-f9a949c8a828/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-13 07:17:28,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:17:28,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 07:17:28,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:17:28,962 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-13 07:17:28,963 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 1 case distinctions, treesize of input 21 treesize of output 22 [2021-10-13 07:17:28,967 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 23 treesize of output 21 [2021-10-13 07:17:29,114 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-10-13 07:17:29,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 46 [2021-10-13 07:17:29,128 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-13 07:17:29,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 36 [2021-10-13 07:17:29,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:17:29,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:17:31,593 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-10-13 07:17:31,593 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 35 treesize of output 34 [2021-10-13 07:17:31,774 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 07:17:31,775 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:17:31,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [728149167] [2021-10-13 07:17:31,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [728149167] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:17:31,775 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:17:31,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 3] imperfect sequences [] total 6 [2021-10-13 07:17:31,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272481487] [2021-10-13 07:17:31,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-13 07:17:31,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:17:31,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-13 07:17:31,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=23, Unknown=1, NotChecked=0, Total=42 [2021-10-13 07:17:31,778 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:17:32,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:17:32,010 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2021-10-13 07:17:32,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:17:32,012 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-13 07:17:32,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:17:32,013 INFO L225 Difference]: With dead ends: 37 [2021-10-13 07:17:32,013 INFO L226 Difference]: Without dead ends: 37 [2021-10-13 07:17:32,013 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 2381.9ms TimeCoverageRelationStatistics Valid=18, Invalid=23, Unknown=1, NotChecked=0, Total=42 [2021-10-13 07:17:32,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-10-13 07:17:32,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-10-13 07:17:32,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 36 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:17:32,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2021-10-13 07:17:32,019 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 5 [2021-10-13 07:17:32,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:17:32,020 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2021-10-13 07:17:32,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:17:32,021 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2021-10-13 07:17:32,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-13 07:17:32,022 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:17:32,022 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:17:32,043 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3a7c32-669a-499f-8105-f9a949c8a828/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-13 07:17:32,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3a7c32-669a-499f-8105-f9a949c8a828/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:17:32,241 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-13 07:17:32,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:17:32,241 INFO L82 PathProgramCache]: Analyzing trace with hash 59200011, now seen corresponding path program 1 times [2021-10-13 07:17:32,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:17:32,242 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1811372791] [2021-10-13 07:17:32,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:17:32,243 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:17:32,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3a7c32-669a-499f-8105-f9a949c8a828/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:17:32,245 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3a7c32-669a-499f-8105-f9a949c8a828/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:17:32,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3a7c32-669a-499f-8105-f9a949c8a828/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-13 07:17:32,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:17:32,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 07:17:32,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:17:32,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:17:32,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:17:32,528 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-10-13 07:17:32,529 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 20 treesize of output 19 [2021-10-13 07:17:32,560 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 07:17:32,560 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:17:32,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1811372791] [2021-10-13 07:17:32,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1811372791] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:17:32,561 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:17:32,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-13 07:17:32,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109966838] [2021-10-13 07:17:32,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 07:17:32,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:17:32,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 07:17:32,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:17:32,563 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:17:32,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:17:32,833 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2021-10-13 07:17:32,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 07:17:32,834 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-13 07:17:32,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:17:32,835 INFO L225 Difference]: With dead ends: 39 [2021-10-13 07:17:32,835 INFO L226 Difference]: Without dead ends: 39 [2021-10-13 07:17:32,836 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 123.3ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-13 07:17:32,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-10-13 07:17:32,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2021-10-13 07:17:32,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 23 states have (on average 1.565217391304348) internal successors, (36), 34 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:17:32,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2021-10-13 07:17:32,840 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 8 [2021-10-13 07:17:32,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:17:32,840 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2021-10-13 07:17:32,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:17:32,840 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2021-10-13 07:17:32,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-13 07:17:32,841 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:17:32,841 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:17:32,856 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3a7c32-669a-499f-8105-f9a949c8a828/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-13 07:17:33,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3a7c32-669a-499f-8105-f9a949c8a828/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:17:33,042 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-13 07:17:33,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:17:33,042 INFO L82 PathProgramCache]: Analyzing trace with hash 59200012, now seen corresponding path program 1 times [2021-10-13 07:17:33,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:17:33,043 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1895332999] [2021-10-13 07:17:33,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:17:33,043 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:17:33,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3a7c32-669a-499f-8105-f9a949c8a828/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:17:33,047 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3a7c32-669a-499f-8105-f9a949c8a828/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:17:33,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3a7c32-669a-499f-8105-f9a949c8a828/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-13 07:17:33,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:17:33,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 07:17:33,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:17:33,300 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 07:17:33,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:17:33,493 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:17:33,493 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 22 treesize of output 26 [2021-10-13 07:17:33,758 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 07:17:33,758 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:17:33,759 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1895332999] [2021-10-13 07:17:33,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1895332999] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:17:33,759 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:17:33,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-10-13 07:17:33,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083984201] [2021-10-13 07:17:33,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 07:17:33,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:17:33,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 07:17:33,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-13 07:17:33,761 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:17:33,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:17:33,962 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2021-10-13 07:17:33,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 07:17:33,963 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-13 07:17:33,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:17:33,964 INFO L225 Difference]: With dead ends: 31 [2021-10-13 07:17:33,964 INFO L226 Difference]: Without dead ends: 31 [2021-10-13 07:17:33,964 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 258.4ms TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-10-13 07:17:33,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-10-13 07:17:33,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-10-13 07:17:33,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 30 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:17:33,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2021-10-13 07:17:33,967 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 8 [2021-10-13 07:17:33,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:17:33,968 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2021-10-13 07:17:33,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:17:33,968 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2021-10-13 07:17:33,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-13 07:17:33,968 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:17:33,969 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:17:33,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3a7c32-669a-499f-8105-f9a949c8a828/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-13 07:17:34,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3a7c32-669a-499f-8105-f9a949c8a828/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:17:34,178 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-13 07:17:34,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:17:34,179 INFO L82 PathProgramCache]: Analyzing trace with hash 406185098, now seen corresponding path program 1 times [2021-10-13 07:17:34,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:17:34,179 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1842018698] [2021-10-13 07:17:34,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:17:34,179 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:17:34,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3a7c32-669a-499f-8105-f9a949c8a828/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:17:34,180 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3a7c32-669a-499f-8105-f9a949c8a828/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:17:34,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3a7c32-669a-499f-8105-f9a949c8a828/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-13 07:17:34,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:17:34,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 07:17:34,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:17:34,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-13 07:17:34,447 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 07:17:34,519 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 07:17:34,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:17:34,594 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 32 [2021-10-13 07:17:34,659 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 07:17:34,659 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:17:34,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1842018698] [2021-10-13 07:17:34,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1842018698] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:17:34,660 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:17:34,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 8 [2021-10-13 07:17:34,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709547106] [2021-10-13 07:17:34,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-13 07:17:34,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:17:34,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-13 07:17:34,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-10-13 07:17:34,662 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand has 9 states, 8 states have (on average 1.625) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:17:35,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:17:35,271 INFO L93 Difference]: Finished difference Result 33 states and 32 transitions. [2021-10-13 07:17:35,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-13 07:17:35,271 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.625) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-13 07:17:35,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:17:35,272 INFO L225 Difference]: With dead ends: 33 [2021-10-13 07:17:35,272 INFO L226 Difference]: Without dead ends: 33 [2021-10-13 07:17:35,273 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 400.7ms TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-10-13 07:17:35,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-10-13 07:17:35,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2021-10-13 07:17:35,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 28 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:17:35,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2021-10-13 07:17:35,277 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 13 [2021-10-13 07:17:35,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:17:35,277 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2021-10-13 07:17:35,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.625) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:17:35,278 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2021-10-13 07:17:35,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-13 07:17:35,278 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:17:35,279 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:17:35,291 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3a7c32-669a-499f-8105-f9a949c8a828/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-13 07:17:35,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3a7c32-669a-499f-8105-f9a949c8a828/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:17:35,481 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-13 07:17:35,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:17:35,482 INFO L82 PathProgramCache]: Analyzing trace with hash -293163793, now seen corresponding path program 1 times [2021-10-13 07:17:35,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:17:35,482 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [76595100] [2021-10-13 07:17:35,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:17:35,483 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:17:35,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3a7c32-669a-499f-8105-f9a949c8a828/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:17:35,487 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3a7c32-669a-499f-8105-f9a949c8a828/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:17:35,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3a7c32-669a-499f-8105-f9a949c8a828/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-13 07:17:35,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:17:35,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-13 07:17:35,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:17:35,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-13 07:17:36,083 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 07:17:36,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:17:36,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:17:36,628 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 32 [2021-10-13 07:17:36,819 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 07:17:36,819 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:17:36,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [76595100] [2021-10-13 07:17:36,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [76595100] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:17:36,820 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:17:36,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 16 [2021-10-13 07:17:36,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607656361] [2021-10-13 07:17:36,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-13 07:17:36,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:17:36,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-13 07:17:36,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-10-13 07:17:36,822 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand has 17 states, 16 states have (on average 1.75) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:17:38,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:17:38,374 INFO L93 Difference]: Finished difference Result 31 states and 30 transitions. [2021-10-13 07:17:38,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-13 07:17:38,375 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-13 07:17:38,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:17:38,376 INFO L225 Difference]: With dead ends: 31 [2021-10-13 07:17:38,377 INFO L226 Difference]: Without dead ends: 31 [2021-10-13 07:17:38,379 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1189.6ms TimeCoverageRelationStatistics Valid=143, Invalid=457, Unknown=0, NotChecked=0, Total=600 [2021-10-13 07:17:38,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-10-13 07:17:38,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2021-10-13 07:17:38,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 23 states have (on average 1.173913043478261) internal successors, (27), 26 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:17:38,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2021-10-13 07:17:38,383 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 14 [2021-10-13 07:17:38,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:17:38,384 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2021-10-13 07:17:38,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:17:38,384 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2021-10-13 07:17:38,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-13 07:17:38,385 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:17:38,385 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:17:38,395 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3a7c32-669a-499f-8105-f9a949c8a828/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-10-13 07:17:38,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3a7c32-669a-499f-8105-f9a949c8a828/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:17:38,589 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-13 07:17:38,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:17:38,589 INFO L82 PathProgramCache]: Analyzing trace with hash -498142932, now seen corresponding path program 1 times [2021-10-13 07:17:38,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:17:38,590 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [554079700] [2021-10-13 07:17:38,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:17:38,590 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:17:38,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3a7c32-669a-499f-8105-f9a949c8a828/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:17:38,591 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3a7c32-669a-499f-8105-f9a949c8a828/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:17:38,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3a7c32-669a-499f-8105-f9a949c8a828/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-13 07:17:38,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:17:38,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 07:17:38,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:17:38,762 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 07:17:38,812 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 23 treesize of output 19 [2021-10-13 07:17:38,901 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 07:17:39,009 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 07:17:39,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:17:39,136 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 52 treesize of output 46 [2021-10-13 07:17:39,279 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 07:17:39,280 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:17:39,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [554079700] [2021-10-13 07:17:39,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [554079700] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:17:39,281 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:17:39,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 9 [2021-10-13 07:17:39,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715927718] [2021-10-13 07:17:39,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 07:17:39,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:17:39,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 07:17:39,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-10-13 07:17:39,283 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:17:40,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:17:40,082 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2021-10-13 07:17:40,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-13 07:17:40,084 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-13 07:17:40,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:17:40,084 INFO L225 Difference]: With dead ends: 28 [2021-10-13 07:17:40,084 INFO L226 Difference]: Without dead ends: 28 [2021-10-13 07:17:40,085 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 602.4ms TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-10-13 07:17:40,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-10-13 07:17:40,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2021-10-13 07:17:40,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 25 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:17:40,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2021-10-13 07:17:40,089 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 15 [2021-10-13 07:17:40,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:17:40,089 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2021-10-13 07:17:40,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:17:40,090 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2021-10-13 07:17:40,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 07:17:40,090 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:17:40,091 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:17:40,102 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3a7c32-669a-499f-8105-f9a949c8a828/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-13 07:17:40,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3a7c32-669a-499f-8105-f9a949c8a828/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:17:40,293 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-13 07:17:40,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:17:40,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1750799681, now seen corresponding path program 1 times [2021-10-13 07:17:40,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:17:40,294 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [188516601] [2021-10-13 07:17:40,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:17:40,294 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:17:40,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3a7c32-669a-499f-8105-f9a949c8a828/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:17:40,295 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3a7c32-669a-499f-8105-f9a949c8a828/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:17:40,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3a7c32-669a-499f-8105-f9a949c8a828/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-13 07:17:40,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 07:17:40,441 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 07:17:40,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 07:17:40,519 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-10-13 07:17:40,519 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-13 07:17:40,520 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK [2021-10-13 07:17:40,522 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATION [2021-10-13 07:17:40,522 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATION [2021-10-13 07:17:40,523 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATION [2021-10-13 07:17:40,523 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATION [2021-10-13 07:17:40,523 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATION [2021-10-13 07:17:40,523 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATION [2021-10-13 07:17:40,523 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATION [2021-10-13 07:17:40,523 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATION [2021-10-13 07:17:40,524 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 07:17:40,524 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 07:17:40,524 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 07:17:40,524 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 07:17:40,524 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 07:17:40,525 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 07:17:40,525 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATION [2021-10-13 07:17:40,525 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15REQUIRES_VIOLATION [2021-10-13 07:17:40,525 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16REQUIRES_VIOLATION [2021-10-13 07:17:40,525 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr17REQUIRES_VIOLATION [2021-10-13 07:17:40,537 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3a7c32-669a-499f-8105-f9a949c8a828/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-10-13 07:17:40,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3a7c32-669a-499f-8105-f9a949c8a828/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:17:40,743 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 07:17:40,768 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 07:17:40 BoogieIcfgContainer [2021-10-13 07:17:40,769 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 07:17:40,769 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 07:17:40,769 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 07:17:40,769 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 07:17:40,770 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:17:27" (3/4) ... [2021-10-13 07:17:40,773 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-13 07:17:40,773 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 07:17:40,774 INFO L168 Benchmark]: Toolchain (without parser) took 14575.87 ms. Allocated memory was 65.0 MB in the beginning and 104.9 MB in the end (delta: 39.8 MB). Free memory was 43.3 MB in the beginning and 44.0 MB in the end (delta: -713.8 kB). Peak memory consumption was 38.5 MB. Max. memory is 16.1 GB. [2021-10-13 07:17:40,775 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 65.0 MB. Free memory is still 45.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:17:40,775 INFO L168 Benchmark]: CACSL2BoogieTranslator took 464.97 ms. Allocated memory is still 65.0 MB. Free memory was 43.1 MB in the beginning and 41.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 07:17:40,776 INFO L168 Benchmark]: Boogie Procedure Inliner took 56.52 ms. Allocated memory is still 65.0 MB. Free memory was 41.7 MB in the beginning and 39.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-13 07:17:40,776 INFO L168 Benchmark]: Boogie Preprocessor took 39.75 ms. Allocated memory is still 65.0 MB. Free memory was 39.7 MB in the beginning and 38.3 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:17:40,777 INFO L168 Benchmark]: RCFGBuilder took 472.52 ms. Allocated memory is still 65.0 MB. Free memory was 38.3 MB in the beginning and 44.8 MB in the end (delta: -6.5 MB). Peak memory consumption was 16.3 MB. Max. memory is 16.1 GB. [2021-10-13 07:17:40,777 INFO L168 Benchmark]: TraceAbstraction took 13532.06 ms. Allocated memory was 65.0 MB in the beginning and 104.9 MB in the end (delta: 39.8 MB). Free memory was 44.4 MB in the beginning and 45.1 MB in the end (delta: -696.7 kB). Peak memory consumption was 37.3 MB. Max. memory is 16.1 GB. [2021-10-13 07:17:40,778 INFO L168 Benchmark]: Witness Printer took 4.25 ms. Allocated memory is still 104.9 MB. Free memory was 45.1 MB in the beginning and 44.0 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:17:40,780 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 65.0 MB. Free memory is still 45.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 464.97 ms. Allocated memory is still 65.0 MB. Free memory was 43.1 MB in the beginning and 41.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 56.52 ms. Allocated memory is still 65.0 MB. Free memory was 41.7 MB in the beginning and 39.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 39.75 ms. Allocated memory is still 65.0 MB. Free memory was 39.7 MB in the beginning and 38.3 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 472.52 ms. Allocated memory is still 65.0 MB. Free memory was 38.3 MB in the beginning and 44.8 MB in the end (delta: -6.5 MB). Peak memory consumption was 16.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 13532.06 ms. Allocated memory was 65.0 MB in the beginning and 104.9 MB in the end (delta: 39.8 MB). Free memory was 44.4 MB in the beginning and 45.1 MB in the end (delta: -696.7 kB). Peak memory consumption was 37.3 MB. Max. memory is 16.1 GB. * Witness Printer took 4.25 ms. Allocated memory is still 104.9 MB. Free memory was 45.1 MB in the beginning and 44.0 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 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 - UnprovableResult [Line: 543]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 543. Possible FailurePath: [L544] TData data; [L529] pdata->lo = malloc(16) [L530] pdata->hi = malloc(24) [L534] EXPR data->lo [L534] void *lo = data->lo; [L535] EXPR data->hi [L535] void *hi = data->hi; [L536] COND FALSE !(lo == hi) [L540] data->lo = (void *) 0 [L541] data->hi = (void *) 0 [L547] return 0; [L547] return 0; - UnprovableResult [Line: 529]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 529]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 530]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 530]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 534]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 534]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 535]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 535]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 537]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 537]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 537]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 538]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 538]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 538]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 540]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 540]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 541]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 541]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 43 locations, 19 error locations. Started 1 CEGAR loops. OverallTime: 13443.0ms, OverallIterations: 9, TraceHistogramMax: 1, EmptinessCheckTime: 15.9ms, AutomataDifference: 4020.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 11.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 150 SDtfs, 535 SDslu, 177 SDs, 0 SdLazy, 493 SolverSat, 70 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2247.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 151 GetRequests, 69 SyntacticMatches, 6 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 5010.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=43occurred in iteration=0, InterpolantAutomatonStates: 59, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 52.4ms AutomataMinimizationTime, 8 MinimizatonAttempts, 21 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 85.3ms SsaConstructionTime, 279.6ms SatisfiabilityAnalysisTime, 6351.9ms InterpolantComputationTime, 85 NumberOfCodeBlocks, 85 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 122 ConstructedInterpolants, 18 QuantifiedInterpolants, 1183 SizeOfPredicates, 81 NumberOfNonLiveVariables, 468 ConjunctsInSsa, 85 ConjunctsInUnsatCore, 16 InterpolantComputations, 16 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-10-13 07:17:40,837 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf3a7c32-669a-499f-8105-f9a949c8a828/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...