./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/s1iff.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_508915ee-da91-4bb7-843f-3b9ec7c1705d/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_508915ee-da91-4bb7-843f-3b9ec7c1705d/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_508915ee-da91-4bb7-843f-3b9ec7c1705d/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_508915ee-da91-4bb7-843f-3b9ec7c1705d/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/s1iff.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_508915ee-da91-4bb7-843f-3b9ec7c1705d/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_508915ee-da91-4bb7-843f-3b9ec7c1705d/bin/utaipan-q2qaUkNPG8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash eec6b2d99ac9a557043cad5fb1ce9cac95211db3 ............................................................................................................................................................................................................................................................................................................................................................................................................. 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_508915ee-da91-4bb7-843f-3b9ec7c1705d/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_508915ee-da91-4bb7-843f-3b9ec7c1705d/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_508915ee-da91-4bb7-843f-3b9ec7c1705d/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_508915ee-da91-4bb7-843f-3b9ec7c1705d/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/s1iff.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_508915ee-da91-4bb7-843f-3b9ec7c1705d/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_508915ee-da91-4bb7-843f-3b9ec7c1705d/bin/utaipan-q2qaUkNPG8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash eec6b2d99ac9a557043cad5fb1ce9cac95211db3 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 06:49:29,824 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 06:49:29,827 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 06:49:29,877 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 06:49:29,878 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 06:49:29,883 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 06:49:29,885 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 06:49:29,890 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 06:49:29,893 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 06:49:29,898 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 06:49:29,900 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 06:49:29,901 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 06:49:29,901 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 06:49:29,902 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 06:49:29,904 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 06:49:29,905 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 06:49:29,907 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 06:49:29,908 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 06:49:29,910 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 06:49:29,913 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 06:49:29,915 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 06:49:29,920 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 06:49:29,922 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 06:49:29,923 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 06:49:29,927 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 06:49:29,927 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 06:49:29,928 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 06:49:29,929 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 06:49:29,930 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 06:49:29,931 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 06:49:29,932 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 06:49:29,933 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 06:49:29,934 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 06:49:29,935 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 06:49:29,936 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 06:49:29,936 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 06:49:29,937 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 06:49:29,938 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 06:49:29,938 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 06:49:29,940 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 06:49:29,941 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 06:49:29,942 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_508915ee-da91-4bb7-843f-3b9ec7c1705d/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-13 06:49:29,980 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 06:49:29,980 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 06:49:29,981 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 06:49:29,981 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 06:49:29,982 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 06:49:29,982 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 06:49:29,982 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-13 06:49:29,982 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 06:49:29,983 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 06:49:29,983 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-13 06:49:29,983 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-13 06:49:29,983 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 06:49:29,984 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-13 06:49:29,984 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-13 06:49:29,984 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-13 06:49:29,985 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 06:49:29,985 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 06:49:29,986 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 06:49:29,986 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 06:49:29,986 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 06:49:29,986 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 06:49:29,986 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 06:49:29,987 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 06:49:29,987 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 06:49:29,987 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 06:49:29,987 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 06:49:29,988 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 06:49:29,988 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 06:49:29,988 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 06:49:29,989 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 06:49:29,989 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 06:49:29,989 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 06:49:29,989 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 06:49:29,996 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 06:49:29,996 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-13 06:49:29,996 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 06:49:29,998 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 06:49:29,998 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 06:49:29,998 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 06:49:29,998 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_508915ee-da91-4bb7-843f-3b9ec7c1705d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_508915ee-da91-4bb7-843f-3b9ec7c1705d/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eec6b2d99ac9a557043cad5fb1ce9cac95211db3 [2021-10-13 06:49:30,238 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 06:49:30,272 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 06:49:30,277 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 06:49:30,279 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 06:49:30,280 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 06:49:30,281 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_508915ee-da91-4bb7-843f-3b9ec7c1705d/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/array-fpi/s1iff.c [2021-10-13 06:49:30,387 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_508915ee-da91-4bb7-843f-3b9ec7c1705d/bin/utaipan-q2qaUkNPG8/data/a8b650008/8eedcf6fff144dc4926be27334ba1a32/FLAG8b08b2494 [2021-10-13 06:49:30,908 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 06:49:30,909 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_508915ee-da91-4bb7-843f-3b9ec7c1705d/sv-benchmarks/c/array-fpi/s1iff.c [2021-10-13 06:49:30,916 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_508915ee-da91-4bb7-843f-3b9ec7c1705d/bin/utaipan-q2qaUkNPG8/data/a8b650008/8eedcf6fff144dc4926be27334ba1a32/FLAG8b08b2494 [2021-10-13 06:49:31,257 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_508915ee-da91-4bb7-843f-3b9ec7c1705d/bin/utaipan-q2qaUkNPG8/data/a8b650008/8eedcf6fff144dc4926be27334ba1a32 [2021-10-13 06:49:31,270 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 06:49:31,271 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 06:49:31,272 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 06:49:31,273 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 06:49:31,276 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 06:49:31,277 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:49:31" (1/1) ... [2021-10-13 06:49:31,278 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5359ecba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:49:31, skipping insertion in model container [2021-10-13 06:49:31,278 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:49:31" (1/1) ... [2021-10-13 06:49:31,285 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 06:49:31,300 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 06:49:31,482 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_508915ee-da91-4bb7-843f-3b9ec7c1705d/sv-benchmarks/c/array-fpi/s1iff.c[588,601] [2021-10-13 06:49:31,499 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 06:49:31,507 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 06:49:31,519 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_508915ee-da91-4bb7-843f-3b9ec7c1705d/sv-benchmarks/c/array-fpi/s1iff.c[588,601] [2021-10-13 06:49:31,527 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 06:49:31,541 INFO L208 MainTranslator]: Completed translation [2021-10-13 06:49:31,542 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:49:31 WrapperNode [2021-10-13 06:49:31,542 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 06:49:31,543 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 06:49:31,543 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 06:49:31,544 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 06:49:31,551 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:49:31" (1/1) ... [2021-10-13 06:49:31,558 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:49:31" (1/1) ... [2021-10-13 06:49:31,579 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 06:49:31,580 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 06:49:31,580 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 06:49:31,580 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 06:49:31,588 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:49:31" (1/1) ... [2021-10-13 06:49:31,589 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:49:31" (1/1) ... [2021-10-13 06:49:31,591 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:49:31" (1/1) ... [2021-10-13 06:49:31,591 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:49:31" (1/1) ... [2021-10-13 06:49:31,597 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:49:31" (1/1) ... [2021-10-13 06:49:31,602 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:49:31" (1/1) ... [2021-10-13 06:49:31,603 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:49:31" (1/1) ... [2021-10-13 06:49:31,605 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 06:49:31,606 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 06:49:31,607 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 06:49:31,607 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 06:49:31,608 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:49:31" (1/1) ... [2021-10-13 06:49:31,615 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 06:49:31,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_508915ee-da91-4bb7-843f-3b9ec7c1705d/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 06:49:31,643 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_508915ee-da91-4bb7-843f-3b9ec7c1705d/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 06:49:31,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_508915ee-da91-4bb7-843f-3b9ec7c1705d/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 06:49:31,689 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 06:49:31,689 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 06:49:31,689 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-13 06:49:31,690 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 06:49:31,690 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 06:49:31,690 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 06:49:31,690 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-13 06:49:31,691 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 06:49:32,018 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 06:49:32,019 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-10-13 06:49:32,021 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:49:32 BoogieIcfgContainer [2021-10-13 06:49:32,022 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 06:49:32,024 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 06:49:32,045 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 06:49:32,049 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 06:49:32,050 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:49:31" (1/3) ... [2021-10-13 06:49:32,051 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e71400a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:49:32, skipping insertion in model container [2021-10-13 06:49:32,051 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:49:31" (2/3) ... [2021-10-13 06:49:32,051 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e71400a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:49:32, skipping insertion in model container [2021-10-13 06:49:32,051 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:49:32" (3/3) ... [2021-10-13 06:49:32,053 INFO L111 eAbstractionObserver]: Analyzing ICFG s1iff.c [2021-10-13 06:49:32,058 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 06:49:32,058 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 06:49:32,126 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 06:49:32,136 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=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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 06:49:32,137 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 06:49:32,154 INFO L276 IsEmpty]: Start isEmpty. Operand has 10 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 06:49:32,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-13 06:49:32,161 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:49:32,161 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-13 06:49:32,162 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:49:32,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:49:32,172 INFO L82 PathProgramCache]: Analyzing trace with hash -1569409207, now seen corresponding path program 1 times [2021-10-13 06:49:32,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 06:49:32,193 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221320357] [2021-10-13 06:49:32,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:49:32,194 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 06:49:32,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:49:32,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:49:32,442 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 06:49:32,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221320357] [2021-10-13 06:49:32,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221320357] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 06:49:32,443 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:49:32,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 06:49:32,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103218429] [2021-10-13 06:49:32,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 06:49:32,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 06:49:32,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 06:49:32,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 06:49:32,471 INFO L87 Difference]: Start difference. First operand has 10 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) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:49:32,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:49:32,515 INFO L93 Difference]: Finished difference Result 18 states and 23 transitions. [2021-10-13 06:49:32,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 06:49:32,517 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-13 06:49:32,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:49:32,524 INFO L225 Difference]: With dead ends: 18 [2021-10-13 06:49:32,524 INFO L226 Difference]: Without dead ends: 8 [2021-10-13 06:49:32,527 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 06:49:32,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-10-13 06:49:32,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-10-13 06:49:32,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.2857142857142858) 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 06:49:32,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2021-10-13 06:49:32,557 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2021-10-13 06:49:32,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:49:32,573 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2021-10-13 06:49:32,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:49:32,574 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2021-10-13 06:49:32,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-13 06:49:32,574 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:49:32,574 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:49:32,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 06:49:32,575 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:49:32,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:49:32,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1413550180, now seen corresponding path program 1 times [2021-10-13 06:49:32,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 06:49:32,576 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595664838] [2021-10-13 06:49:32,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:49:32,577 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 06:49:32,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:49:32,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 06:49:32,638 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 06:49:32,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595664838] [2021-10-13 06:49:32,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595664838] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 06:49:32,639 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:49:32,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 06:49:32,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462909824] [2021-10-13 06:49:32,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 06:49:32,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 06:49:32,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 06:49:32,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 06:49:32,642 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 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 06:49:32,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:49:32,662 INFO L93 Difference]: Finished difference Result 12 states and 13 transitions. [2021-10-13 06:49:32,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 06:49:32,663 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 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 06:49:32,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:49:32,663 INFO L225 Difference]: With dead ends: 12 [2021-10-13 06:49:32,663 INFO L226 Difference]: Without dead ends: 9 [2021-10-13 06:49:32,664 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.8ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 06:49:32,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-10-13 06:49:32,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-10-13 06:49:32,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:49:32,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2021-10-13 06:49:32,667 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 7 [2021-10-13 06:49:32,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:49:32,667 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2021-10-13 06:49:32,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 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 06:49:32,668 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2021-10-13 06:49:32,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-13 06:49:32,668 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:49:32,668 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:49:32,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-13 06:49:32,669 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:49:32,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:49:32,670 INFO L82 PathProgramCache]: Analyzing trace with hash -870274037, now seen corresponding path program 1 times [2021-10-13 06:49:32,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 06:49:32,670 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412114328] [2021-10-13 06:49:32,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:49:32,670 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 06:49:32,699 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 06:49:32,699 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1350804604] [2021-10-13 06:49:32,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:49:32,700 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 06:49:32,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_508915ee-da91-4bb7-843f-3b9ec7c1705d/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 06:49:32,711 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_508915ee-da91-4bb7-843f-3b9ec7c1705d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 06:49:32,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_508915ee-da91-4bb7-843f-3b9ec7c1705d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 06:49:32,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:49:32,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-13 06:49:32,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:49:32,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 06:49:32,901 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 10 treesize of output 8 [2021-10-13 06:49:32,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-10-13 06:49:33,173 INFO L354 Elim1Store]: treesize reduction 39, result has 15.2 percent of original size [2021-10-13 06:49:33,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 27 [2021-10-13 06:49:33,274 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 06:49:33,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 42 [2021-10-13 06:49:33,337 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:49:33,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:49:33,842 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:49:33,843 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 06:49:33,843 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412114328] [2021-10-13 06:49:33,843 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-13 06:49:33,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350804604] [2021-10-13 06:49:33,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350804604] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:49:33,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1911347571] [2021-10-13 06:49:33,866 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-10-13 06:49:33,866 INFO L166 IcfgInterpreter]: Building call graph [2021-10-13 06:49:33,871 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-13 06:49:33,877 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-13 06:49:33,877 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-13 06:49:33,912 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:49:33,914 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 06:49:33,915 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:49:33,916 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-13 06:49:33,917 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 06:49:33,918 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:49:33,918 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-13 06:49:33,920 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 127 [2021-10-13 06:49:33,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:49:33,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:49:33,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:49:34,003 INFO L354 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2021-10-13 06:49:34,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 43 treesize of output 42 [2021-10-13 06:49:34,004 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:49:34,008 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-10-13 06:49:34,010 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:49:34,011 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-10-13 06:49:34,012 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-13 06:49:34,014 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 06:49:34,080 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:49:34,081 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:49:34,083 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 108 [2021-10-13 06:49:34,084 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-13 06:49:34,084 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:124, output treesize:108 [2021-10-13 06:49:34,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_508915ee-da91-4bb7-843f-3b9ec7c1705d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 06:49:34,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_508915ee-da91-4bb7-843f-3b9ec7c1705d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 06:49:34,310 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: No corresponding IProgramVar for |v_#length_17| at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.constructTermVarsProc(BasicPredicateFactory.java:92) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.newPredicate(BasicPredicateFactory.java:81) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.predicate(SymbolicTools.java:174) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:608) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:53) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:392) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-10-13 06:49:34,314 INFO L168 Benchmark]: Toolchain (without parser) took 3042.30 ms. Allocated memory was 86.0 MB in the beginning and 111.1 MB in the end (delta: 25.2 MB). Free memory was 53.7 MB in the beginning and 44.8 MB in the end (delta: 9.0 MB). Peak memory consumption was 33.6 MB. Max. memory is 16.1 GB. [2021-10-13 06:49:34,315 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 86.0 MB. Free memory was 39.2 MB in the beginning and 39.2 MB in the end (delta: 40.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 06:49:34,316 INFO L168 Benchmark]: CACSL2BoogieTranslator took 269.88 ms. Allocated memory was 86.0 MB in the beginning and 111.1 MB in the end (delta: 25.2 MB). Free memory was 53.6 MB in the beginning and 87.7 MB in the end (delta: -34.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 06:49:34,316 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.04 ms. Allocated memory is still 111.1 MB. Free memory was 87.7 MB in the beginning and 86.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 06:49:34,317 INFO L168 Benchmark]: Boogie Preprocessor took 26.03 ms. Allocated memory is still 111.1 MB. Free memory was 86.0 MB in the beginning and 84.8 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 06:49:34,317 INFO L168 Benchmark]: RCFGBuilder took 415.30 ms. Allocated memory is still 111.1 MB. Free memory was 84.8 MB in the beginning and 70.6 MB in the end (delta: 14.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-13 06:49:34,318 INFO L168 Benchmark]: TraceAbstraction took 2289.39 ms. Allocated memory is still 111.1 MB. Free memory was 70.1 MB in the beginning and 44.8 MB in the end (delta: 25.4 MB). Peak memory consumption was 26.3 MB. Max. memory is 16.1 GB. [2021-10-13 06:49:34,322 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 86.0 MB. Free memory was 39.2 MB in the beginning and 39.2 MB in the end (delta: 40.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 269.88 ms. Allocated memory was 86.0 MB in the beginning and 111.1 MB in the end (delta: 25.2 MB). Free memory was 53.6 MB in the beginning and 87.7 MB in the end (delta: -34.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 36.04 ms. Allocated memory is still 111.1 MB. Free memory was 87.7 MB in the beginning and 86.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 26.03 ms. Allocated memory is still 111.1 MB. Free memory was 86.0 MB in the beginning and 84.8 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 415.30 ms. Allocated memory is still 111.1 MB. Free memory was 84.8 MB in the beginning and 70.6 MB in the end (delta: 14.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2289.39 ms. Allocated memory is still 111.1 MB. Free memory was 70.1 MB in the beginning and 44.8 MB in the end (delta: 25.4 MB). Peak memory consumption was 26.3 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: No corresponding IProgramVar for |v_#length_17| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#length_17|: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-10-13 06:49:34,366 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_508915ee-da91-4bb7-843f-3b9ec7c1705d/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 06:49:36,900 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 06:49:36,904 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 06:49:36,966 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 06:49:36,967 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 06:49:36,972 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 06:49:36,974 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 06:49:36,980 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 06:49:36,984 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 06:49:36,992 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 06:49:36,994 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 06:49:36,996 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 06:49:36,997 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 06:49:37,000 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 06:49:37,002 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 06:49:37,007 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 06:49:37,010 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 06:49:37,011 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 06:49:37,014 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 06:49:37,023 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 06:49:37,025 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 06:49:37,027 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 06:49:37,029 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 06:49:37,032 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 06:49:37,042 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 06:49:37,043 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 06:49:37,043 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 06:49:37,046 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 06:49:37,046 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 06:49:37,048 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 06:49:37,048 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 06:49:37,049 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 06:49:37,052 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 06:49:37,053 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 06:49:37,054 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 06:49:37,055 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 06:49:37,056 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 06:49:37,056 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 06:49:37,057 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 06:49:37,059 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 06:49:37,060 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 06:49:37,061 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_508915ee-da91-4bb7-843f-3b9ec7c1705d/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-13 06:49:37,124 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 06:49:37,125 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 06:49:37,126 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 06:49:37,126 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 06:49:37,127 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 06:49:37,127 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 06:49:37,127 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 06:49:37,127 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 06:49:37,128 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 06:49:37,129 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 06:49:37,129 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 06:49:37,129 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 06:49:37,129 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 06:49:37,130 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 06:49:37,130 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 06:49:37,130 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 06:49:37,130 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 06:49:37,131 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 06:49:37,131 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 06:49:37,131 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 06:49:37,131 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 06:49:37,132 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 06:49:37,132 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 06:49:37,132 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 06:49:37,132 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 06:49:37,133 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 06:49:37,133 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 06:49:37,133 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 06:49:37,133 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 06:49:37,134 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 06:49:37,134 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-13 06:49:37,134 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 06:49:37,134 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 06:49:37,135 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 06:49:37,135 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 06:49:37,135 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_508915ee-da91-4bb7-843f-3b9ec7c1705d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_508915ee-da91-4bb7-843f-3b9ec7c1705d/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eec6b2d99ac9a557043cad5fb1ce9cac95211db3 [2021-10-13 06:49:37,555 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 06:49:37,584 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 06:49:37,588 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 06:49:37,590 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 06:49:37,594 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 06:49:37,597 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_508915ee-da91-4bb7-843f-3b9ec7c1705d/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/array-fpi/s1iff.c [2021-10-13 06:49:37,673 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_508915ee-da91-4bb7-843f-3b9ec7c1705d/bin/utaipan-q2qaUkNPG8/data/c228fb496/519777f869f846b8b16280984524218a/FLAG490f9a5a8 [2021-10-13 06:49:38,268 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 06:49:38,268 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_508915ee-da91-4bb7-843f-3b9ec7c1705d/sv-benchmarks/c/array-fpi/s1iff.c [2021-10-13 06:49:38,276 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_508915ee-da91-4bb7-843f-3b9ec7c1705d/bin/utaipan-q2qaUkNPG8/data/c228fb496/519777f869f846b8b16280984524218a/FLAG490f9a5a8 [2021-10-13 06:49:38,672 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_508915ee-da91-4bb7-843f-3b9ec7c1705d/bin/utaipan-q2qaUkNPG8/data/c228fb496/519777f869f846b8b16280984524218a [2021-10-13 06:49:38,677 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 06:49:38,680 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 06:49:38,686 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 06:49:38,686 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 06:49:38,691 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 06:49:38,692 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:49:38" (1/1) ... [2021-10-13 06:49:38,694 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e69d0f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:49:38, skipping insertion in model container [2021-10-13 06:49:38,694 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:49:38" (1/1) ... [2021-10-13 06:49:38,703 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 06:49:38,721 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 06:49:38,946 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_508915ee-da91-4bb7-843f-3b9ec7c1705d/sv-benchmarks/c/array-fpi/s1iff.c[588,601] [2021-10-13 06:49:38,984 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 06:49:38,999 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 06:49:39,019 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_508915ee-da91-4bb7-843f-3b9ec7c1705d/sv-benchmarks/c/array-fpi/s1iff.c[588,601] [2021-10-13 06:49:39,057 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 06:49:39,102 INFO L208 MainTranslator]: Completed translation [2021-10-13 06:49:39,102 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:49:39 WrapperNode [2021-10-13 06:49:39,103 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 06:49:39,104 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 06:49:39,104 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 06:49:39,104 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 06:49:39,113 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:49:39" (1/1) ... [2021-10-13 06:49:39,154 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:49:39" (1/1) ... [2021-10-13 06:49:39,179 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 06:49:39,180 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 06:49:39,180 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 06:49:39,180 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 06:49:39,190 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:49:39" (1/1) ... [2021-10-13 06:49:39,190 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:49:39" (1/1) ... [2021-10-13 06:49:39,194 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:49:39" (1/1) ... [2021-10-13 06:49:39,194 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:49:39" (1/1) ... [2021-10-13 06:49:39,203 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:49:39" (1/1) ... [2021-10-13 06:49:39,208 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:49:39" (1/1) ... [2021-10-13 06:49:39,209 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:49:39" (1/1) ... [2021-10-13 06:49:39,212 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 06:49:39,213 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 06:49:39,214 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 06:49:39,214 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 06:49:39,215 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:49:39" (1/1) ... [2021-10-13 06:49:39,222 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 06:49:39,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_508915ee-da91-4bb7-843f-3b9ec7c1705d/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 06:49:39,256 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_508915ee-da91-4bb7-843f-3b9ec7c1705d/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 06:49:39,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_508915ee-da91-4bb7-843f-3b9ec7c1705d/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 06:49:39,298 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 06:49:39,298 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 06:49:39,298 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-10-13 06:49:39,298 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 06:49:39,298 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-13 06:49:39,299 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 06:49:39,299 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 06:49:39,299 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-10-13 06:49:39,299 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 06:49:39,299 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-13 06:49:39,652 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 06:49:39,652 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-10-13 06:49:39,654 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:49:39 BoogieIcfgContainer [2021-10-13 06:49:39,655 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 06:49:39,657 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 06:49:39,657 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 06:49:39,660 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 06:49:39,661 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:49:38" (1/3) ... [2021-10-13 06:49:39,662 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28334b7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:49:39, skipping insertion in model container [2021-10-13 06:49:39,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:49:39" (2/3) ... [2021-10-13 06:49:39,662 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28334b7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:49:39, skipping insertion in model container [2021-10-13 06:49:39,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:49:39" (3/3) ... [2021-10-13 06:49:39,664 INFO L111 eAbstractionObserver]: Analyzing ICFG s1iff.c [2021-10-13 06:49:39,670 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 06:49:39,671 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 06:49:39,727 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 06:49:39,734 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=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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 06:49:39,735 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 06:49:39,750 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 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 06:49:39,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 06:49:39,756 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:49:39,757 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:49:39,758 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:49:39,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:49:39,765 INFO L82 PathProgramCache]: Analyzing trace with hash 356661439, now seen corresponding path program 1 times [2021-10-13 06:49:39,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:49:39,779 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [514100719] [2021-10-13 06:49:39,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:49:39,781 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:49:39,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_508915ee-da91-4bb7-843f-3b9ec7c1705d/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:49:39,785 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_508915ee-da91-4bb7-843f-3b9ec7c1705d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:49:39,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_508915ee-da91-4bb7-843f-3b9ec7c1705d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 06:49:39,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:49:39,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-13 06:49:39,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:49:39,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:49:39,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:49:40,064 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 06:49:40,065 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:49:40,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [514100719] [2021-10-13 06:49:40,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [514100719] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 06:49:40,066 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:49:40,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-13 06:49:40,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800528310] [2021-10-13 06:49:40,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-13 06:49:40,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:49:40,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-13 06:49:40,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 06:49:40,113 INFO L87 Difference]: Start difference. First operand has 19 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 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) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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 06:49:40,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:49:40,129 INFO L93 Difference]: Finished difference Result 34 states and 46 transitions. [2021-10-13 06:49:40,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-13 06:49:40,131 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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 11 [2021-10-13 06:49:40,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:49:40,139 INFO L225 Difference]: With dead ends: 34 [2021-10-13 06:49:40,139 INFO L226 Difference]: Without dead ends: 15 [2021-10-13 06:49:40,143 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 06:49:40,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-10-13 06:49:40,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-10-13 06:49:40,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 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 06:49:40,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2021-10-13 06:49:40,174 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 11 [2021-10-13 06:49:40,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:49:40,175 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2021-10-13 06:49:40,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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 06:49:40,175 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2021-10-13 06:49:40,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 06:49:40,176 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:49:40,176 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:49:40,195 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_508915ee-da91-4bb7-843f-3b9ec7c1705d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-13 06:49:40,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_508915ee-da91-4bb7-843f-3b9ec7c1705d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 06:49:40,391 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:49:40,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:49:40,397 INFO L82 PathProgramCache]: Analyzing trace with hash -452685187, now seen corresponding path program 1 times [2021-10-13 06:49:40,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:49:40,401 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1038923333] [2021-10-13 06:49:40,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:49:40,401 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:49:40,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_508915ee-da91-4bb7-843f-3b9ec7c1705d/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:49:40,403 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_508915ee-da91-4bb7-843f-3b9ec7c1705d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:49:40,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_508915ee-da91-4bb7-843f-3b9ec7c1705d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 06:49:40,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:49:40,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 06:49:40,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:49:40,793 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 06:49:40,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:49:40,940 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 06:49:40,940 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:49:40,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1038923333] [2021-10-13 06:49:40,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1038923333] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 06:49:40,941 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:49:40,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-10-13 06:49:40,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600811636] [2021-10-13 06:49:40,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 06:49:40,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:49:40,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 06:49:40,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-13 06:49:40,944 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 8 states, 8 states have (on average 1.875) 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 06:49:41,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:49:41,436 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2021-10-13 06:49:41,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 06:49:41,437 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) 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 11 [2021-10-13 06:49:41,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:49:41,438 INFO L225 Difference]: With dead ends: 28 [2021-10-13 06:49:41,438 INFO L226 Difference]: Without dead ends: 20 [2021-10-13 06:49:41,440 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 218.8ms TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-10-13 06:49:41,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-10-13 06:49:41,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2021-10-13 06:49:41,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 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 06:49:41,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-10-13 06:49:41,462 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2021-10-13 06:49:41,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:49:41,463 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-10-13 06:49:41,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) 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 06:49:41,463 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-10-13 06:49:41,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 06:49:41,464 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:49:41,465 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:49:41,486 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_508915ee-da91-4bb7-843f-3b9ec7c1705d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-13 06:49:41,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_508915ee-da91-4bb7-843f-3b9ec7c1705d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 06:49:41,686 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:49:41,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:49:41,687 INFO L82 PathProgramCache]: Analyzing trace with hash 623611495, now seen corresponding path program 1 times [2021-10-13 06:49:41,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:49:41,688 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1287692361] [2021-10-13 06:49:41,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:49:41,688 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:49:41,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_508915ee-da91-4bb7-843f-3b9ec7c1705d/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:49:41,691 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_508915ee-da91-4bb7-843f-3b9ec7c1705d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:49:41,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_508915ee-da91-4bb7-843f-3b9ec7c1705d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-13 06:49:41,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:49:41,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-13 06:49:41,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:49:42,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:49:42,047 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-10-13 06:49:42,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 21 [2021-10-13 06:49:42,076 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 12 treesize of output 10 [2021-10-13 06:49:42,210 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-10-13 06:49:42,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2021-10-13 06:49:42,870 INFO L354 Elim1Store]: treesize reduction 134, result has 13.5 percent of original size [2021-10-13 06:49:42,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 53 [2021-10-13 06:49:43,266 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-10-13 06:49:43,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 68 [2021-10-13 06:49:43,333 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:49:43,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:49:49,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 06:49:49,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:49:49,725 INFO L354 Elim1Store]: treesize reduction 87, result has 26.3 percent of original size [2021-10-13 06:49:49,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 1673 treesize of output 1031 [2021-10-13 06:49:49,754 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-13 06:49:49,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1031 treesize of output 993 [2021-10-13 06:49:49,784 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-10-13 06:49:49,785 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 1313 treesize of output 1307 [2021-10-13 06:49:49,821 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 1295 treesize of output 1293 [2021-10-13 06:49:49,849 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 186 treesize of output 184 [2021-10-13 06:49:50,185 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:49:50,186 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:49:50,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1287692361] [2021-10-13 06:49:50,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1287692361] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:49:50,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1701299803] [2021-10-13 06:49:50,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:49:50,187 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 06:49:50,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_508915ee-da91-4bb7-843f-3b9ec7c1705d/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 06:49:50,198 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_508915ee-da91-4bb7-843f-3b9ec7c1705d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 06:49:50,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_508915ee-da91-4bb7-843f-3b9ec7c1705d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-10-13 06:49:50,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:49:50,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-13 06:49:50,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:49:50,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:49:50,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:49:50,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 21 [2021-10-13 06:49:50,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 06:49:50,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:49:50,748 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-10-13 06:49:50,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 38 [2021-10-13 06:49:51,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:49:51,749 INFO L354 Elim1Store]: treesize reduction 31, result has 18.4 percent of original size [2021-10-13 06:49:51,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 90 treesize of output 55 [2021-10-13 06:49:52,222 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-13 06:49:52,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 98 treesize of output 70 [2021-10-13 06:49:52,255 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:49:52,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:49:52,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 06:49:52,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:49:52,976 INFO L354 Elim1Store]: treesize reduction 17, result has 63.0 percent of original size [2021-10-13 06:49:52,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 184 treesize of output 136 [2021-10-13 06:49:52,995 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-13 06:49:52,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 136 treesize of output 126 [2021-10-13 06:49:53,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 82 [2021-10-13 06:49:53,175 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:49:53,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1701299803] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:49:53,175 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245704777] [2021-10-13 06:49:53,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:49:53,176 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 06:49:53,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_508915ee-da91-4bb7-843f-3b9ec7c1705d/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 06:49:53,183 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_508915ee-da91-4bb7-843f-3b9ec7c1705d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 06:49:53,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_508915ee-da91-4bb7-843f-3b9ec7c1705d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-13 06:49:53,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:49:53,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-13 06:49:53,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:49:53,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:49:53,434 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-10-13 06:49:53,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 21 [2021-10-13 06:49:53,452 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 11 treesize of output 9 [2021-10-13 06:49:53,506 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-10-13 06:49:53,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2021-10-13 06:49:54,013 INFO L354 Elim1Store]: treesize reduction 280, result has 10.3 percent of original size [2021-10-13 06:49:54,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 107 treesize of output 67 [2021-10-13 06:49:54,357 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-10-13 06:49:54,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 68 [2021-10-13 06:49:54,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:49:54,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:50:12,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 06:50:12,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:50:12,324 INFO L354 Elim1Store]: treesize reduction 110, result has 32.5 percent of original size [2021-10-13 06:50:12,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 3048 treesize of output 1595 [2021-10-13 06:50:12,363 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-13 06:50:12,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1595 treesize of output 1493 [2021-10-13 06:50:12,381 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 2355 treesize of output 2061 [2021-10-13 06:50:12,424 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-13 06:50:12,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1027 treesize of output 989 [2021-10-13 06:50:12,457 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-10-13 06:50:12,458 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 1309 treesize of output 1303 [2021-10-13 06:50:12,495 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-10-13 06:50:12,496 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 1291 treesize of output 1285 [2021-10-13 06:50:12,523 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 1273 treesize of output 1271 [2021-10-13 06:50:12,546 INFO L883 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-10-13 06:50:12,553 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 357 treesize of output 355 [2021-10-13 06:50:13,004 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:50:13,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245704777] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:50:13,005 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 06:50:13,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10, 10, 11, 11] total 34 [2021-10-13 06:50:13,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877775053] [2021-10-13 06:50:13,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-10-13 06:50:13,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:50:13,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-10-13 06:50:13,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=890, Unknown=8, NotChecked=0, Total=1122 [2021-10-13 06:50:13,021 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 34 states, 34 states have (on average 1.6176470588235294) internal successors, (55), 34 states have internal predecessors, (55), 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 06:50:21,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:50:21,320 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2021-10-13 06:50:21,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-13 06:50:21,321 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.6176470588235294) internal successors, (55), 34 states have internal predecessors, (55), 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 16 [2021-10-13 06:50:21,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:50:21,322 INFO L225 Difference]: With dead ends: 36 [2021-10-13 06:50:21,322 INFO L226 Difference]: Without dead ends: 27 [2021-10-13 06:50:21,324 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 573 ImplicationChecksByTransitivity, 28203.4ms TimeCoverageRelationStatistics Valid=433, Invalid=1629, Unknown=8, NotChecked=0, Total=2070 [2021-10-13 06:50:21,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-10-13 06:50:21,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2021-10-13 06:50:21,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 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 06:50:21,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2021-10-13 06:50:21,331 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 16 [2021-10-13 06:50:21,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:50:21,332 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-10-13 06:50:21,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.6176470588235294) internal successors, (55), 34 states have internal predecessors, (55), 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 06:50:21,333 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2021-10-13 06:50:21,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-13 06:50:21,334 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:50:21,334 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:50:21,365 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_508915ee-da91-4bb7-843f-3b9ec7c1705d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-10-13 06:50:21,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_508915ee-da91-4bb7-843f-3b9ec7c1705d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-10-13 06:50:21,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_508915ee-da91-4bb7-843f-3b9ec7c1705d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-13 06:50:21,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_508915ee-da91-4bb7-843f-3b9ec7c1705d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_508915ee-da91-4bb7-843f-3b9ec7c1705d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_508915ee-da91-4bb7-843f-3b9ec7c1705d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 06:50:21,946 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:50:21,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:50:21,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1137819675, now seen corresponding path program 2 times [2021-10-13 06:50:21,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:50:21,947 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [212996336] [2021-10-13 06:50:21,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 06:50:21,947 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:50:21,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_508915ee-da91-4bb7-843f-3b9ec7c1705d/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:50:21,950 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_508915ee-da91-4bb7-843f-3b9ec7c1705d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:50:22,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_508915ee-da91-4bb7-843f-3b9ec7c1705d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-13 06:50:22,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 06:50:22,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 06:50:22,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 06:50:22,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:50:22,683 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:50:22,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:50:23,102 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:50:23,102 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:50:23,103 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [212996336] [2021-10-13 06:50:23,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [212996336] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:50:23,103 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1067357797] [2021-10-13 06:50:23,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 06:50:23,104 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 06:50:23,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_508915ee-da91-4bb7-843f-3b9ec7c1705d/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 06:50:23,105 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_508915ee-da91-4bb7-843f-3b9ec7c1705d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 06:50:23,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_508915ee-da91-4bb7-843f-3b9ec7c1705d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-10-13 06:50:23,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 06:50:23,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 06:50:23,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 06:50:23,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:50:23,587 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:50:23,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:50:23,723 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:50:23,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1067357797] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:50:23,724 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205840995] [2021-10-13 06:50:23,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 06:50:23,724 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 06:50:23,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_508915ee-da91-4bb7-843f-3b9ec7c1705d/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 06:50:23,734 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_508915ee-da91-4bb7-843f-3b9ec7c1705d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 06:50:23,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_508915ee-da91-4bb7-843f-3b9ec7c1705d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-13 06:50:23,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 06:50:23,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 06:50:23,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 06:50:23,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:50:24,202 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:50:24,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:50:24,386 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:50:24,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205840995] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:50:24,386 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 06:50:24,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 11, 9, 9, 7] total 22 [2021-10-13 06:50:24,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944444448] [2021-10-13 06:50:24,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-13 06:50:24,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:50:24,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-13 06:50:24,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=323, Unknown=0, NotChecked=0, Total=462 [2021-10-13 06:50:24,389 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:50:26,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:50:26,750 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions. [2021-10-13 06:50:26,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-13 06:50:26,758 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-13 06:50:26,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:50:26,760 INFO L225 Difference]: With dead ends: 54 [2021-10-13 06:50:26,760 INFO L226 Difference]: Without dead ends: 47 [2021-10-13 06:50:26,761 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 1341.1ms TimeCoverageRelationStatistics Valid=325, Invalid=797, Unknown=0, NotChecked=0, Total=1122 [2021-10-13 06:50:26,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-10-13 06:50:26,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 35. [2021-10-13 06:50:26,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 34 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:50:26,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2021-10-13 06:50:26,772 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 18 [2021-10-13 06:50:26,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:50:26,773 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2021-10-13 06:50:26,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:50:26,773 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2021-10-13 06:50:26,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-13 06:50:26,775 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:50:26,775 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:50:26,786 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_508915ee-da91-4bb7-843f-3b9ec7c1705d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-10-13 06:50:27,001 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_508915ee-da91-4bb7-843f-3b9ec7c1705d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-13 06:50:27,186 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_508915ee-da91-4bb7-843f-3b9ec7c1705d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-10-13 06:50:27,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_508915ee-da91-4bb7-843f-3b9ec7c1705d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_508915ee-da91-4bb7-843f-3b9ec7c1705d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_508915ee-da91-4bb7-843f-3b9ec7c1705d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 06:50:27,382 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:50:27,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:50:27,382 INFO L82 PathProgramCache]: Analyzing trace with hash -479454913, now seen corresponding path program 3 times [2021-10-13 06:50:27,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:50:27,383 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [695413795] [2021-10-13 06:50:27,383 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 06:50:27,383 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:50:27,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_508915ee-da91-4bb7-843f-3b9ec7c1705d/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:50:27,384 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_508915ee-da91-4bb7-843f-3b9ec7c1705d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:50:27,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_508915ee-da91-4bb7-843f-3b9ec7c1705d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-13 06:50:27,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-13 06:50:27,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 06:50:27,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 06:50:27,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:50:27,966 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:50:27,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:50:28,227 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:50:28,227 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:50:28,227 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [695413795] [2021-10-13 06:50:28,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [695413795] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:50:28,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [909293020] [2021-10-13 06:50:28,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 06:50:28,228 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 06:50:28,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_508915ee-da91-4bb7-843f-3b9ec7c1705d/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 06:50:28,234 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_508915ee-da91-4bb7-843f-3b9ec7c1705d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 06:50:28,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_508915ee-da91-4bb7-843f-3b9ec7c1705d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-10-13 06:50:28,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-13 06:50:28,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 06:50:28,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 06:50:28,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:50:28,769 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:50:28,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:50:28,895 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:50:28,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [909293020] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:50:28,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121109954] [2021-10-13 06:50:28,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 06:50:28,895 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 06:50:28,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_508915ee-da91-4bb7-843f-3b9ec7c1705d/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 06:50:28,896 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_508915ee-da91-4bb7-843f-3b9ec7c1705d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 06:50:28,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_508915ee-da91-4bb7-843f-3b9ec7c1705d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-13 06:50:29,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-13 06:50:29,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 06:50:29,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 06:50:29,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:50:29,376 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:50:29,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:50:29,470 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:50:29,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121109954] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:50:29,470 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 06:50:29,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 9, 7, 9, 7] total 14 [2021-10-13 06:50:29,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411224107] [2021-10-13 06:50:29,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-13 06:50:29,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:50:29,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-13 06:50:29,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-10-13 06:50:29,472 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 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 06:50:30,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:50:30,422 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2021-10-13 06:50:30,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 06:50:30,423 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 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) Word has length 19 [2021-10-13 06:50:30,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:50:30,424 INFO L225 Difference]: With dead ends: 46 [2021-10-13 06:50:30,424 INFO L226 Difference]: Without dead ends: 34 [2021-10-13 06:50:30,425 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 626.2ms TimeCoverageRelationStatistics Valid=114, Invalid=306, Unknown=0, NotChecked=0, Total=420 [2021-10-13 06:50:30,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-10-13 06:50:30,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2021-10-13 06:50:30,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 31 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 06:50:30,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2021-10-13 06:50:30,433 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 19 [2021-10-13 06:50:30,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:50:30,433 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2021-10-13 06:50:30,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 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 06:50:30,433 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2021-10-13 06:50:30,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-13 06:50:30,434 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:50:30,435 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:50:30,449 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_508915ee-da91-4bb7-843f-3b9ec7c1705d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-10-13 06:50:30,654 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_508915ee-da91-4bb7-843f-3b9ec7c1705d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-13 06:50:30,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_508915ee-da91-4bb7-843f-3b9ec7c1705d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-13 06:50:31,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_508915ee-da91-4bb7-843f-3b9ec7c1705d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_508915ee-da91-4bb7-843f-3b9ec7c1705d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_508915ee-da91-4bb7-843f-3b9ec7c1705d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 06:50:31,047 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:50:31,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:50:31,048 INFO L82 PathProgramCache]: Analyzing trace with hash 634982145, now seen corresponding path program 4 times [2021-10-13 06:50:31,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:50:31,048 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [753220314] [2021-10-13 06:50:31,048 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 06:50:31,049 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:50:31,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_508915ee-da91-4bb7-843f-3b9ec7c1705d/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:50:31,050 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_508915ee-da91-4bb7-843f-3b9ec7c1705d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:50:31,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_508915ee-da91-4bb7-843f-3b9ec7c1705d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-13 06:50:31,375 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 06:50:31,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-10-13 06:50:31,375 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 06:50:31,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 06:50:31,491 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-10-13 06:50:31,491 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-13 06:50:31,492 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 06:50:31,514 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_508915ee-da91-4bb7-843f-3b9ec7c1705d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-10-13 06:50:31,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_508915ee-da91-4bb7-843f-3b9ec7c1705d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 06:50:31,709 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 06:50:31,744 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 06:50:31 BoogieIcfgContainer [2021-10-13 06:50:31,744 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 06:50:31,745 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 06:50:31,745 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 06:50:31,746 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 06:50:31,746 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:49:39" (3/4) ... [2021-10-13 06:50:31,749 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-13 06:50:31,844 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_508915ee-da91-4bb7-843f-3b9ec7c1705d/bin/utaipan-q2qaUkNPG8/witness.graphml [2021-10-13 06:50:31,845 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 06:50:31,846 INFO L168 Benchmark]: Toolchain (without parser) took 53165.50 ms. Allocated memory was 77.6 MB in the beginning and 109.1 MB in the end (delta: 31.5 MB). Free memory was 43.3 MB in the beginning and 71.8 MB in the end (delta: -28.5 MB). Peak memory consumption was 4.1 MB. Max. memory is 16.1 GB. [2021-10-13 06:50:31,846 INFO L168 Benchmark]: CDTParser took 0.38 ms. Allocated memory is still 77.6 MB. Free memory was 59.8 MB in the beginning and 59.7 MB in the end (delta: 65.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 06:50:31,847 INFO L168 Benchmark]: CACSL2BoogieTranslator took 417.04 ms. Allocated memory is still 77.6 MB. Free memory was 43.1 MB in the beginning and 62.6 MB in the end (delta: -19.5 MB). Peak memory consumption was 10.8 MB. Max. memory is 16.1 GB. [2021-10-13 06:50:31,852 INFO L168 Benchmark]: Boogie Procedure Inliner took 74.96 ms. Allocated memory is still 77.6 MB. Free memory was 62.6 MB in the beginning and 61.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 06:50:31,853 INFO L168 Benchmark]: Boogie Preprocessor took 33.08 ms. Allocated memory is still 77.6 MB. Free memory was 60.9 MB in the beginning and 59.6 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 06:50:31,853 INFO L168 Benchmark]: RCFGBuilder took 441.53 ms. Allocated memory is still 77.6 MB. Free memory was 59.6 MB in the beginning and 48.3 MB in the end (delta: 11.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 06:50:31,854 INFO L168 Benchmark]: TraceAbstraction took 52087.84 ms. Allocated memory was 77.6 MB in the beginning and 109.1 MB in the end (delta: 31.5 MB). Free memory was 47.7 MB in the beginning and 73.9 MB in the end (delta: -26.2 MB). Peak memory consumption was 5.9 MB. Max. memory is 16.1 GB. [2021-10-13 06:50:31,854 INFO L168 Benchmark]: Witness Printer took 99.72 ms. Allocated memory is still 109.1 MB. Free memory was 73.9 MB in the beginning and 71.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 06:50:31,857 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.38 ms. Allocated memory is still 77.6 MB. Free memory was 59.8 MB in the beginning and 59.7 MB in the end (delta: 65.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 417.04 ms. Allocated memory is still 77.6 MB. Free memory was 43.1 MB in the beginning and 62.6 MB in the end (delta: -19.5 MB). Peak memory consumption was 10.8 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 74.96 ms. Allocated memory is still 77.6 MB. Free memory was 62.6 MB in the beginning and 61.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 33.08 ms. Allocated memory is still 77.6 MB. Free memory was 60.9 MB in the beginning and 59.6 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 441.53 ms. Allocated memory is still 77.6 MB. Free memory was 59.6 MB in the beginning and 48.3 MB in the end (delta: 11.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 52087.84 ms. Allocated memory was 77.6 MB in the beginning and 109.1 MB in the end (delta: 31.5 MB). Free memory was 47.7 MB in the beginning and 73.9 MB in the end (delta: -26.2 MB). Peak memory consumption was 5.9 MB. Max. memory is 16.1 GB. * Witness Printer took 99.72 ms. Allocated memory is still 109.1 MB. Free memory was 73.9 MB in the beginning and 71.8 MB in the end (delta: 2.1 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 - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int N; VAL [N=0] [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L13] COND FALSE !(!cond) VAL [N=2] [L27] int i; [L28] long long sum[1]; [L29] int *a = malloc(sizeof(int)*N); [L31] sum[0] = 1 [L32] i=0 VAL [N=2] [L32] COND TRUE i