./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/string-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b99aa2-9646-4d72-84ec-c2da4b8dcda5/bin/uautomizer-j4sWxH34Be/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b99aa2-9646-4d72-84ec-c2da4b8dcda5/bin/uautomizer-j4sWxH34Be/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b99aa2-9646-4d72-84ec-c2da4b8dcda5/bin/uautomizer-j4sWxH34Be/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b99aa2-9646-4d72-84ec-c2da4b8dcda5/bin/uautomizer-j4sWxH34Be/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops/string-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b99aa2-9646-4d72-84ec-c2da4b8dcda5/bin/uautomizer-j4sWxH34Be/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b99aa2-9646-4d72-84ec-c2da4b8dcda5/bin/uautomizer-j4sWxH34Be --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash fd601fa28543c13c2fbec075867019b65bb9d0c4bbf720a0162dbf887aa47892 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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_63b99aa2-9646-4d72-84ec-c2da4b8dcda5/bin/uautomizer-j4sWxH34Be/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b99aa2-9646-4d72-84ec-c2da4b8dcda5/bin/uautomizer-j4sWxH34Be/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b99aa2-9646-4d72-84ec-c2da4b8dcda5/bin/uautomizer-j4sWxH34Be/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b99aa2-9646-4d72-84ec-c2da4b8dcda5/bin/uautomizer-j4sWxH34Be/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops/string-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b99aa2-9646-4d72-84ec-c2da4b8dcda5/bin/uautomizer-j4sWxH34Be/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b99aa2-9646-4d72-84ec-c2da4b8dcda5/bin/uautomizer-j4sWxH34Be --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash fd601fa28543c13c2fbec075867019b65bb9d0c4bbf720a0162dbf887aa47892 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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-e943c26 [2021-10-21 20:05:14,415 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-21 20:05:14,417 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-21 20:05:14,469 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-21 20:05:14,469 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-21 20:05:14,474 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-21 20:05:14,479 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-21 20:05:14,482 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-21 20:05:14,484 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-21 20:05:14,485 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-21 20:05:14,487 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-21 20:05:14,488 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-21 20:05:14,489 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-21 20:05:14,490 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-21 20:05:14,492 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-21 20:05:14,494 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-21 20:05:14,495 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-21 20:05:14,496 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-21 20:05:14,499 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-21 20:05:14,501 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-21 20:05:14,503 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-21 20:05:14,507 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-21 20:05:14,508 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-21 20:05:14,513 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-21 20:05:14,517 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-21 20:05:14,520 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-21 20:05:14,521 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-21 20:05:14,522 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-21 20:05:14,524 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-21 20:05:14,525 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-21 20:05:14,527 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-21 20:05:14,528 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-21 20:05:14,530 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-21 20:05:14,531 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-21 20:05:14,533 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-21 20:05:14,533 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-21 20:05:14,534 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-21 20:05:14,534 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-21 20:05:14,534 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-21 20:05:14,535 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-21 20:05:14,536 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-21 20:05:14,537 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b99aa2-9646-4d72-84ec-c2da4b8dcda5/bin/uautomizer-j4sWxH34Be/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-21 20:05:14,579 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-21 20:05:14,579 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-21 20:05:14,579 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-21 20:05:14,580 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-21 20:05:14,581 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-21 20:05:14,581 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-21 20:05:14,581 INFO L138 SettingsManager]: * Use SBE=true [2021-10-21 20:05:14,581 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-21 20:05:14,582 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-21 20:05:14,582 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-21 20:05:14,582 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-21 20:05:14,582 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-21 20:05:14,582 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-21 20:05:14,582 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-21 20:05:14,583 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-21 20:05:14,583 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-21 20:05:14,583 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-21 20:05:14,583 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-21 20:05:14,583 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-21 20:05:14,584 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-21 20:05:14,584 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-21 20:05:14,584 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-21 20:05:14,584 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 20:05:14,584 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-21 20:05:14,585 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-21 20:05:14,585 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-21 20:05:14,585 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-21 20:05:14,585 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-21 20:05:14,585 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-21 20:05:14,586 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-21 20:05:14,586 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-21 20:05:14,593 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-21 20:05:14,593 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b99aa2-9646-4d72-84ec-c2da4b8dcda5/bin/uautomizer-j4sWxH34Be/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b99aa2-9646-4d72-84ec-c2da4b8dcda5/bin/uautomizer-j4sWxH34Be Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fd601fa28543c13c2fbec075867019b65bb9d0c4bbf720a0162dbf887aa47892 [2021-10-21 20:05:14,865 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-21 20:05:14,893 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-21 20:05:14,896 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-21 20:05:14,897 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-21 20:05:14,898 INFO L275 PluginConnector]: CDTParser initialized [2021-10-21 20:05:14,899 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b99aa2-9646-4d72-84ec-c2da4b8dcda5/bin/uautomizer-j4sWxH34Be/../../sv-benchmarks/c/loops/string-2.i [2021-10-21 20:05:14,967 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b99aa2-9646-4d72-84ec-c2da4b8dcda5/bin/uautomizer-j4sWxH34Be/data/8b5ce9637/6993e696923b4dc2b87741bbe5747646/FLAGd585a65a8 [2021-10-21 20:05:15,405 INFO L306 CDTParser]: Found 1 translation units. [2021-10-21 20:05:15,405 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b99aa2-9646-4d72-84ec-c2da4b8dcda5/sv-benchmarks/c/loops/string-2.i [2021-10-21 20:05:15,412 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b99aa2-9646-4d72-84ec-c2da4b8dcda5/bin/uautomizer-j4sWxH34Be/data/8b5ce9637/6993e696923b4dc2b87741bbe5747646/FLAGd585a65a8 [2021-10-21 20:05:15,814 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b99aa2-9646-4d72-84ec-c2da4b8dcda5/bin/uautomizer-j4sWxH34Be/data/8b5ce9637/6993e696923b4dc2b87741bbe5747646 [2021-10-21 20:05:15,817 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-21 20:05:15,818 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-21 20:05:15,827 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-21 20:05:15,827 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-21 20:05:15,831 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-21 20:05:15,831 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 08:05:15" (1/1) ... [2021-10-21 20:05:15,832 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2315891d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:05:15, skipping insertion in model container [2021-10-21 20:05:15,833 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 08:05:15" (1/1) ... [2021-10-21 20:05:15,839 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-21 20:05:15,855 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-21 20:05:15,994 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_63b99aa2-9646-4d72-84ec-c2da4b8dcda5/sv-benchmarks/c/loops/string-2.i[896,909] [2021-10-21 20:05:16,023 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 20:05:16,030 INFO L203 MainTranslator]: Completed pre-run [2021-10-21 20:05:16,042 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_63b99aa2-9646-4d72-84ec-c2da4b8dcda5/sv-benchmarks/c/loops/string-2.i[896,909] [2021-10-21 20:05:16,052 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 20:05:16,065 INFO L208 MainTranslator]: Completed translation [2021-10-21 20:05:16,066 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:05:16 WrapperNode [2021-10-21 20:05:16,066 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-21 20:05:16,068 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-21 20:05:16,068 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-21 20:05:16,068 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-21 20:05:16,075 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:05:16" (1/1) ... [2021-10-21 20:05:16,092 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:05:16" (1/1) ... [2021-10-21 20:05:16,126 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-21 20:05:16,127 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-21 20:05:16,127 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-21 20:05:16,128 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-21 20:05:16,135 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:05:16" (1/1) ... [2021-10-21 20:05:16,135 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:05:16" (1/1) ... [2021-10-21 20:05:16,140 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:05:16" (1/1) ... [2021-10-21 20:05:16,140 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:05:16" (1/1) ... [2021-10-21 20:05:16,146 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:05:16" (1/1) ... [2021-10-21 20:05:16,150 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:05:16" (1/1) ... [2021-10-21 20:05:16,154 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:05:16" (1/1) ... [2021-10-21 20:05:16,157 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-21 20:05:16,167 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-21 20:05:16,167 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-21 20:05:16,167 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-21 20:05:16,168 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:05:16" (1/1) ... [2021-10-21 20:05:16,177 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 20:05:16,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b99aa2-9646-4d72-84ec-c2da4b8dcda5/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:05:16,207 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b99aa2-9646-4d72-84ec-c2da4b8dcda5/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-21 20:05:16,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b99aa2-9646-4d72-84ec-c2da4b8dcda5/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-21 20:05:16,245 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-21 20:05:16,245 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-21 20:05:16,245 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-21 20:05:16,246 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-21 20:05:16,246 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-21 20:05:16,246 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-21 20:05:16,246 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-21 20:05:16,481 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-21 20:05:16,482 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-10-21 20:05:16,483 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 08:05:16 BoogieIcfgContainer [2021-10-21 20:05:16,484 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-21 20:05:16,485 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-21 20:05:16,486 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-21 20:05:16,489 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-21 20:05:16,489 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 08:05:15" (1/3) ... [2021-10-21 20:05:16,490 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37606e53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 08:05:16, skipping insertion in model container [2021-10-21 20:05:16,490 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:05:16" (2/3) ... [2021-10-21 20:05:16,491 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37606e53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 08:05:16, skipping insertion in model container [2021-10-21 20:05:16,491 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 08:05:16" (3/3) ... [2021-10-21 20:05:16,493 INFO L111 eAbstractionObserver]: Analyzing ICFG string-2.i [2021-10-21 20:05:16,514 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-21 20:05:16,514 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-21 20:05:16,578 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-21 20:05:16,584 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, mAutomataTypeConcurrency=PETRI_NET, 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 [2021-10-21 20:05:16,585 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-21 20:05:16,599 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 25 states have internal predecessors, (40), 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) [2021-10-21 20:05:16,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-21 20:05:16,605 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:05:16,605 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:05:16,606 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:05:16,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:05:16,611 INFO L82 PathProgramCache]: Analyzing trace with hash 374782792, now seen corresponding path program 1 times [2021-10-21 20:05:16,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:05:16,621 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825950542] [2021-10-21 20:05:16,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:05:16,622 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:05:16,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:05:16,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:05:16,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:05:16,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825950542] [2021-10-21 20:05:16,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825950542] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:05:16,835 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:05:16,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 20:05:16,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057792311] [2021-10-21 20:05:16,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 20:05:16,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:05:16,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 20:05:16,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 20:05:16,858 INFO L87 Difference]: Start difference. First operand has 26 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 25 states have internal predecessors, (40), 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 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 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) [2021-10-21 20:05:16,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:05:16,938 INFO L93 Difference]: Finished difference Result 62 states and 95 transitions. [2021-10-21 20:05:16,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 20:05:16,940 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 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 [2021-10-21 20:05:16,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:05:16,949 INFO L225 Difference]: With dead ends: 62 [2021-10-21 20:05:16,949 INFO L226 Difference]: Without dead ends: 32 [2021-10-21 20:05:16,952 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 20:05:16,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-10-21 20:05:16,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 24. [2021-10-21 20:05:16,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:05:16,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2021-10-21 20:05:16,985 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 16 [2021-10-21 20:05:16,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:05:16,986 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2021-10-21 20:05:16,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 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) [2021-10-21 20:05:16,986 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2021-10-21 20:05:16,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-21 20:05:16,987 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:05:16,987 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:05:16,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-21 20:05:16,988 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:05:16,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:05:16,989 INFO L82 PathProgramCache]: Analyzing trace with hash 177830358, now seen corresponding path program 1 times [2021-10-21 20:05:16,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:05:16,990 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3958892] [2021-10-21 20:05:16,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:05:16,990 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:05:17,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:05:17,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 20:05:17,077 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:05:17,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3958892] [2021-10-21 20:05:17,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3958892] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:05:17,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788882524] [2021-10-21 20:05:17,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:05:17,079 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:05:17,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b99aa2-9646-4d72-84ec-c2da4b8dcda5/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:05:17,083 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b99aa2-9646-4d72-84ec-c2da4b8dcda5/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:05:17,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b99aa2-9646-4d72-84ec-c2da4b8dcda5/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-21 20:05:17,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:05:17,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-21 20:05:17,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:05:17,303 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 20:05:17,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788882524] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:05:17,304 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:05:17,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-10-21 20:05:17,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910785884] [2021-10-21 20:05:17,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 20:05:17,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:05:17,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 20:05:17,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:05:17,308 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:05:17,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:05:17,367 INFO L93 Difference]: Finished difference Result 61 states and 74 transitions. [2021-10-21 20:05:17,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:05:17,369 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-21 20:05:17,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:05:17,371 INFO L225 Difference]: With dead ends: 61 [2021-10-21 20:05:17,372 INFO L226 Difference]: Without dead ends: 42 [2021-10-21 20:05:17,373 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.0ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:05:17,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-10-21 20:05:17,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 28. [2021-10-21 20:05:17,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 states have internal predecessors, (33), 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) [2021-10-21 20:05:17,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2021-10-21 20:05:17,382 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 22 [2021-10-21 20:05:17,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:05:17,383 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2021-10-21 20:05:17,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:05:17,384 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2021-10-21 20:05:17,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-21 20:05:17,387 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:05:17,388 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:05:17,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b99aa2-9646-4d72-84ec-c2da4b8dcda5/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-21 20:05:17,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b99aa2-9646-4d72-84ec-c2da4b8dcda5/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:05:17,603 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:05:17,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:05:17,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1590720246, now seen corresponding path program 2 times [2021-10-21 20:05:17,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:05:17,604 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110030208] [2021-10-21 20:05:17,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:05:17,605 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:05:17,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:05:17,736 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-21 20:05:17,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:05:17,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110030208] [2021-10-21 20:05:17,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110030208] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:05:17,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495009705] [2021-10-21 20:05:17,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 20:05:17,738 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:05:17,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b99aa2-9646-4d72-84ec-c2da4b8dcda5/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:05:17,739 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b99aa2-9646-4d72-84ec-c2da4b8dcda5/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:05:17,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b99aa2-9646-4d72-84ec-c2da4b8dcda5/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-21 20:05:17,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 20:05:17,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:05:17,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-21 20:05:17,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:05:17,916 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-21 20:05:17,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495009705] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:05:17,917 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:05:17,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-10-21 20:05:17,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082216752] [2021-10-21 20:05:17,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 20:05:17,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:05:17,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 20:05:17,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:05:17,926 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:05:18,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:05:18,020 INFO L93 Difference]: Finished difference Result 73 states and 87 transitions. [2021-10-21 20:05:18,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 20:05:18,021 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-21 20:05:18,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:05:18,024 INFO L225 Difference]: With dead ends: 73 [2021-10-21 20:05:18,024 INFO L226 Difference]: Without dead ends: 52 [2021-10-21 20:05:18,025 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 12.9ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:05:18,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-10-21 20:05:18,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 32. [2021-10-21 20:05:18,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 31 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:05:18,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2021-10-21 20:05:18,047 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 26 [2021-10-21 20:05:18,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:05:18,048 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2021-10-21 20:05:18,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:05:18,048 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2021-10-21 20:05:18,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-21 20:05:18,049 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:05:18,050 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:05:18,087 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b99aa2-9646-4d72-84ec-c2da4b8dcda5/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-21 20:05:18,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b99aa2-9646-4d72-84ec-c2da4b8dcda5/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:05:18,267 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:05:18,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:05:18,267 INFO L82 PathProgramCache]: Analyzing trace with hash -381068522, now seen corresponding path program 3 times [2021-10-21 20:05:18,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:05:18,268 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088660308] [2021-10-21 20:05:18,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:05:18,268 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:05:18,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:05:18,346 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-21 20:05:18,346 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:05:18,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088660308] [2021-10-21 20:05:18,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088660308] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:05:18,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053321896] [2021-10-21 20:05:18,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 20:05:18,347 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:05:18,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b99aa2-9646-4d72-84ec-c2da4b8dcda5/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:05:18,348 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b99aa2-9646-4d72-84ec-c2da4b8dcda5/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:05:18,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b99aa2-9646-4d72-84ec-c2da4b8dcda5/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-21 20:05:18,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-21 20:05:18,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:05:18,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-21 20:05:18,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:05:18,514 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-21 20:05:18,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053321896] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:05:18,515 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:05:18,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-10-21 20:05:18,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935572157] [2021-10-21 20:05:18,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 20:05:18,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:05:18,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 20:05:18,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-10-21 20:05:18,517 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:05:18,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:05:18,602 INFO L93 Difference]: Finished difference Result 85 states and 100 transitions. [2021-10-21 20:05:18,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 20:05:18,603 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-10-21 20:05:18,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:05:18,604 INFO L225 Difference]: With dead ends: 85 [2021-10-21 20:05:18,604 INFO L226 Difference]: Without dead ends: 62 [2021-10-21 20:05:18,605 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 17.1ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-10-21 20:05:18,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-10-21 20:05:18,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 36. [2021-10-21 20:05:18,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 35 states have internal predecessors, (41), 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) [2021-10-21 20:05:18,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2021-10-21 20:05:18,610 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 30 [2021-10-21 20:05:18,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:05:18,611 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2021-10-21 20:05:18,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:05:18,611 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2021-10-21 20:05:18,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-21 20:05:18,612 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:05:18,612 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:05:18,655 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b99aa2-9646-4d72-84ec-c2da4b8dcda5/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-21 20:05:18,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b99aa2-9646-4d72-84ec-c2da4b8dcda5/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:05:18,843 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:05:18,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:05:18,843 INFO L82 PathProgramCache]: Analyzing trace with hash -583604682, now seen corresponding path program 4 times [2021-10-21 20:05:18,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:05:18,844 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682315662] [2021-10-21 20:05:18,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:05:18,844 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:05:18,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:05:18,924 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-21 20:05:18,924 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:05:18,924 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682315662] [2021-10-21 20:05:18,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682315662] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:05:18,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281081838] [2021-10-21 20:05:18,925 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-21 20:05:18,925 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:05:18,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b99aa2-9646-4d72-84ec-c2da4b8dcda5/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:05:18,930 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b99aa2-9646-4d72-84ec-c2da4b8dcda5/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:05:18,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b99aa2-9646-4d72-84ec-c2da4b8dcda5/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-21 20:05:19,005 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-21 20:05:19,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:05:19,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-21 20:05:19,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:05:19,139 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-21 20:05:19,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281081838] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:05:19,141 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:05:19,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-10-21 20:05:19,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267814569] [2021-10-21 20:05:19,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 20:05:19,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:05:19,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 20:05:19,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:05:19,144 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:05:19,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:05:19,236 INFO L93 Difference]: Finished difference Result 95 states and 111 transitions. [2021-10-21 20:05:19,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 20:05:19,237 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-10-21 20:05:19,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:05:19,238 INFO L225 Difference]: With dead ends: 95 [2021-10-21 20:05:19,238 INFO L226 Difference]: Without dead ends: 70 [2021-10-21 20:05:19,239 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 21.2ms TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:05:19,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-10-21 20:05:19,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 40. [2021-10-21 20:05:19,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 39 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) [2021-10-21 20:05:19,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2021-10-21 20:05:19,244 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 34 [2021-10-21 20:05:19,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:05:19,245 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2021-10-21 20:05:19,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:05:19,245 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2021-10-21 20:05:19,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-21 20:05:19,246 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:05:19,247 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:05:19,284 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b99aa2-9646-4d72-84ec-c2da4b8dcda5/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-21 20:05:19,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b99aa2-9646-4d72-84ec-c2da4b8dcda5/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:05:19,474 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:05:19,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:05:19,474 INFO L82 PathProgramCache]: Analyzing trace with hash -270804906, now seen corresponding path program 5 times [2021-10-21 20:05:19,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:05:19,474 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175500920] [2021-10-21 20:05:19,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:05:19,475 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:05:19,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:05:19,537 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 20:05:19,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:05:19,630 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 20:05:19,630 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-21 20:05:19,631 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-21 20:05:19,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-21 20:05:19,641 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-21 20:05:19,703 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 08:05:19 BoogieIcfgContainer [2021-10-21 20:05:19,703 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-21 20:05:19,705 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-21 20:05:19,705 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-21 20:05:19,705 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-21 20:05:19,706 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 08:05:16" (3/4) ... [2021-10-21 20:05:19,709 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-21 20:05:19,709 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-21 20:05:19,711 INFO L168 Benchmark]: Toolchain (without parser) took 3891.95 ms. Allocated memory was 104.9 MB in the beginning and 125.8 MB in the end (delta: 21.0 MB). Free memory was 76.0 MB in the beginning and 41.2 MB in the end (delta: 34.8 MB). Peak memory consumption was 58.4 MB. Max. memory is 16.1 GB. [2021-10-21 20:05:19,712 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 104.9 MB. Free memory is still 76.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 20:05:19,713 INFO L168 Benchmark]: CACSL2BoogieTranslator took 239.91 ms. Allocated memory is still 104.9 MB. Free memory was 76.0 MB in the beginning and 65.7 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-21 20:05:19,713 INFO L168 Benchmark]: Boogie Procedure Inliner took 58.69 ms. Allocated memory is still 104.9 MB. Free memory was 65.7 MB in the beginning and 63.9 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 20:05:19,715 INFO L168 Benchmark]: Boogie Preprocessor took 29.77 ms. Allocated memory is still 104.9 MB. Free memory was 63.9 MB in the beginning and 62.7 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 20:05:19,719 INFO L168 Benchmark]: RCFGBuilder took 316.91 ms. Allocated memory is still 104.9 MB. Free memory was 62.5 MB in the beginning and 51.2 MB in the end (delta: 11.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-21 20:05:19,720 INFO L168 Benchmark]: TraceAbstraction took 3217.70 ms. Allocated memory was 104.9 MB in the beginning and 125.8 MB in the end (delta: 21.0 MB). Free memory was 50.8 MB in the beginning and 42.2 MB in the end (delta: 8.6 MB). Peak memory consumption was 31.2 MB. Max. memory is 16.1 GB. [2021-10-21 20:05:19,720 INFO L168 Benchmark]: Witness Printer took 4.93 ms. Allocated memory is still 125.8 MB. Free memory is still 41.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 20:05:19,723 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 104.9 MB. Free memory is still 76.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 239.91 ms. Allocated memory is still 104.9 MB. Free memory was 76.0 MB in the beginning and 65.7 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 58.69 ms. Allocated memory is still 104.9 MB. Free memory was 65.7 MB in the beginning and 63.9 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 29.77 ms. Allocated memory is still 104.9 MB. Free memory was 63.9 MB in the beginning and 62.7 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 316.91 ms. Allocated memory is still 104.9 MB. Free memory was 62.5 MB in the beginning and 51.2 MB in the end (delta: 11.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 3217.70 ms. Allocated memory was 104.9 MB in the beginning and 125.8 MB in the end (delta: 21.0 MB). Free memory was 50.8 MB in the beginning and 42.2 MB in the end (delta: 8.6 MB). Peak memory consumption was 31.2 MB. Max. memory is 16.1 GB. * Witness Printer took 4.93 ms. Allocated memory is still 125.8 MB. Free memory is still 41.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 20]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of shiftLeft at line 69. Possible FailurePath: [L31] char string_A[5], string_B[5]; [L32] int i, j, nc_A, nc_B, found=0; [L35] i=0 [L35] COND TRUE i<5 [L36] string_A[i]=__VERIFIER_nondet_char() [L35] i++ [L35] COND TRUE i<5 [L36] string_A[i]=__VERIFIER_nondet_char() [L35] i++ [L35] COND TRUE i<5 [L36] string_A[i]=__VERIFIER_nondet_char() [L35] i++ [L35] COND TRUE i<5 [L36] string_A[i]=__VERIFIER_nondet_char() [L35] i++ [L35] COND TRUE i<5 [L36] string_A[i]=__VERIFIER_nondet_char() [L35] i++ [L35] COND FALSE !(i<5) [L37] EXPR string_A[5 -1] [L37] COND FALSE !(!(string_A[5 -1]=='\0')) [L39] i=0 [L39] COND TRUE i<5 [L40] string_B[i]=__VERIFIER_nondet_char() [L39] i++ [L39] COND TRUE i<5 [L40] string_B[i]=__VERIFIER_nondet_char() [L39] i++ [L39] COND TRUE i<5 [L40] string_B[i]=__VERIFIER_nondet_char() [L39] i++ [L39] COND TRUE i<5 [L40] string_B[i]=__VERIFIER_nondet_char() [L39] i++ [L39] COND TRUE i<5 [L40] string_B[i]=__VERIFIER_nondet_char() [L39] i++ [L39] COND FALSE !(i<5) [L41] EXPR string_B[5 -1] [L41] COND FALSE !(!(string_B[5 -1]=='\0')) [L43] nc_A = 0 [L44] EXPR string_A[nc_A] [L44] COND FALSE !(string_A[nc_A]!='\0') [L47] nc_B = 0 [L48] EXPR string_B[nc_B] [L48] COND FALSE !(string_B[nc_B]!='\0') [L51] COND FALSE !(!(nc_B >= nc_A)) [L54] EXPR j=0 [L54] i=j=0 [L55] COND FALSE !((inc_B-1)< main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b99aa2-9646-4d72-84ec-c2da4b8dcda5/bin/uautomizer-j4sWxH34Be 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 -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fd601fa28543c13c2fbec075867019b65bb9d0c4bbf720a0162dbf887aa47892 [2021-10-21 20:05:22,691 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-21 20:05:22,716 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-21 20:05:22,719 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-21 20:05:22,720 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-21 20:05:22,722 INFO L275 PluginConnector]: CDTParser initialized [2021-10-21 20:05:22,723 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b99aa2-9646-4d72-84ec-c2da4b8dcda5/bin/uautomizer-j4sWxH34Be/../../sv-benchmarks/c/loops/string-2.i [2021-10-21 20:05:22,799 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b99aa2-9646-4d72-84ec-c2da4b8dcda5/bin/uautomizer-j4sWxH34Be/data/bdb24c22a/54a9766e3fdd44bea0bc2c2dfd0e0fa2/FLAG577b50313 [2021-10-21 20:05:23,317 INFO L306 CDTParser]: Found 1 translation units. [2021-10-21 20:05:23,322 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b99aa2-9646-4d72-84ec-c2da4b8dcda5/sv-benchmarks/c/loops/string-2.i [2021-10-21 20:05:23,330 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b99aa2-9646-4d72-84ec-c2da4b8dcda5/bin/uautomizer-j4sWxH34Be/data/bdb24c22a/54a9766e3fdd44bea0bc2c2dfd0e0fa2/FLAG577b50313 [2021-10-21 20:05:23,673 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b99aa2-9646-4d72-84ec-c2da4b8dcda5/bin/uautomizer-j4sWxH34Be/data/bdb24c22a/54a9766e3fdd44bea0bc2c2dfd0e0fa2 [2021-10-21 20:05:23,684 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-21 20:05:23,687 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-21 20:05:23,690 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-21 20:05:23,691 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-21 20:05:23,695 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-21 20:05:23,696 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 08:05:23" (1/1) ... [2021-10-21 20:05:23,699 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e64acf5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:05:23, skipping insertion in model container [2021-10-21 20:05:23,699 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 08:05:23" (1/1) ... [2021-10-21 20:05:23,707 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-21 20:05:23,728 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-21 20:05:23,942 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_63b99aa2-9646-4d72-84ec-c2da4b8dcda5/sv-benchmarks/c/loops/string-2.i[896,909] [2021-10-21 20:05:23,977 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 20:05:24,009 INFO L203 MainTranslator]: Completed pre-run [2021-10-21 20:05:24,021 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_63b99aa2-9646-4d72-84ec-c2da4b8dcda5/sv-benchmarks/c/loops/string-2.i[896,909] [2021-10-21 20:05:24,040 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 20:05:24,054 INFO L208 MainTranslator]: Completed translation [2021-10-21 20:05:24,054 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:05:24 WrapperNode [2021-10-21 20:05:24,055 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-21 20:05:24,056 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-21 20:05:24,056 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-21 20:05:24,056 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-21 20:05:24,062 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:05:24" (1/1) ... [2021-10-21 20:05:24,070 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:05:24" (1/1) ... [2021-10-21 20:05:24,092 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-21 20:05:24,093 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-21 20:05:24,093 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-21 20:05:24,093 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-21 20:05:24,101 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:05:24" (1/1) ... [2021-10-21 20:05:24,101 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:05:24" (1/1) ... [2021-10-21 20:05:24,105 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:05:24" (1/1) ... [2021-10-21 20:05:24,105 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:05:24" (1/1) ... [2021-10-21 20:05:24,114 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:05:24" (1/1) ... [2021-10-21 20:05:24,118 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:05:24" (1/1) ... [2021-10-21 20:05:24,120 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:05:24" (1/1) ... [2021-10-21 20:05:24,123 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-21 20:05:24,124 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-21 20:05:24,124 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-21 20:05:24,124 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-21 20:05:24,125 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:05:24" (1/1) ... [2021-10-21 20:05:24,131 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 20:05:24,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b99aa2-9646-4d72-84ec-c2da4b8dcda5/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:05:24,170 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b99aa2-9646-4d72-84ec-c2da4b8dcda5/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-21 20:05:24,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b99aa2-9646-4d72-84ec-c2da4b8dcda5/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-21 20:05:24,210 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-10-21 20:05:24,210 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-21 20:05:24,211 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-21 20:05:24,211 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-21 20:05:24,211 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-21 20:05:24,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-10-21 20:05:24,211 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-21 20:05:24,485 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-21 20:05:24,485 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-10-21 20:05:24,487 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 08:05:24 BoogieIcfgContainer [2021-10-21 20:05:24,487 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-21 20:05:24,489 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-21 20:05:24,489 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-21 20:05:24,492 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-21 20:05:24,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 08:05:23" (1/3) ... [2021-10-21 20:05:24,493 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65589b78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 08:05:24, skipping insertion in model container [2021-10-21 20:05:24,493 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:05:24" (2/3) ... [2021-10-21 20:05:24,494 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65589b78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 08:05:24, skipping insertion in model container [2021-10-21 20:05:24,494 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 08:05:24" (3/3) ... [2021-10-21 20:05:24,495 INFO L111 eAbstractionObserver]: Analyzing ICFG string-2.i [2021-10-21 20:05:24,519 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-21 20:05:24,519 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-21 20:05:24,580 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-21 20:05:24,586 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, mAutomataTypeConcurrency=PETRI_NET, 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 [2021-10-21 20:05:24,587 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-21 20:05:24,600 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 25 states have internal predecessors, (40), 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) [2021-10-21 20:05:24,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-21 20:05:24,614 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:05:24,614 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:05:24,615 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:05:24,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:05:24,620 INFO L82 PathProgramCache]: Analyzing trace with hash 374782792, now seen corresponding path program 1 times [2021-10-21 20:05:24,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 20:05:24,634 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2005456910] [2021-10-21 20:05:24,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:05:24,636 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 20:05:24,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b99aa2-9646-4d72-84ec-c2da4b8dcda5/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 20:05:24,639 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b99aa2-9646-4d72-84ec-c2da4b8dcda5/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 20:05:24,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b99aa2-9646-4d72-84ec-c2da4b8dcda5/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-21 20:05:24,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:05:24,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-21 20:05:24,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:05:24,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:05:24,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 20:05:24,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:05:24,900 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 20:05:24,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2005456910] [2021-10-21 20:05:24,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2005456910] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 20:05:24,901 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:05:24,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-21 20:05:24,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095991589] [2021-10-21 20:05:24,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-21 20:05:24,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 20:05:24,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-21 20:05:24,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-21 20:05:24,932 INFO L87 Difference]: Start difference. First operand has 26 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 25 states have internal predecessors, (40), 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 8.0) internal successors, (16), 2 states have internal predecessors, (16), 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) [2021-10-21 20:05:24,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:05:24,951 INFO L93 Difference]: Finished difference Result 48 states and 74 transitions. [2021-10-21 20:05:24,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-21 20:05:24,953 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 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 [2021-10-21 20:05:24,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:05:24,961 INFO L225 Difference]: With dead ends: 48 [2021-10-21 20:05:24,962 INFO L226 Difference]: Without dead ends: 22 [2021-10-21 20:05:24,964 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-21 20:05:24,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-10-21 20:05:25,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-10-21 20:05:25,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:05:25,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2021-10-21 20:05:25,005 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 16 [2021-10-21 20:05:25,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:05:25,005 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2021-10-21 20:05:25,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 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) [2021-10-21 20:05:25,007 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2021-10-21 20:05:25,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-21 20:05:25,009 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:05:25,009 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:05:25,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b99aa2-9646-4d72-84ec-c2da4b8dcda5/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-21 20:05:25,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b99aa2-9646-4d72-84ec-c2da4b8dcda5/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 20:05:25,232 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:05:25,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:05:25,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1602331574, now seen corresponding path program 1 times [2021-10-21 20:05:25,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 20:05:25,234 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [610696208] [2021-10-21 20:05:25,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:05:25,235 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 20:05:25,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b99aa2-9646-4d72-84ec-c2da4b8dcda5/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 20:05:25,236 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b99aa2-9646-4d72-84ec-c2da4b8dcda5/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 20:05:25,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b99aa2-9646-4d72-84ec-c2da4b8dcda5/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-21 20:05:25,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:05:25,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-21 20:05:25,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:05:25,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:05:25,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 20:05:25,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:05:25,481 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 20:05:25,481 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [610696208] [2021-10-21 20:05:25,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [610696208] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 20:05:25,482 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:05:25,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-21 20:05:25,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311837458] [2021-10-21 20:05:25,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:05:25,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 20:05:25,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:05:25,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:05:25,489 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 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) [2021-10-21 20:05:25,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:05:25,616 INFO L93 Difference]: Finished difference Result 58 states and 73 transitions. [2021-10-21 20:05:25,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:05:25,617 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 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 [2021-10-21 20:05:25,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:05:25,621 INFO L225 Difference]: With dead ends: 58 [2021-10-21 20:05:25,621 INFO L226 Difference]: Without dead ends: 40 [2021-10-21 20:05:25,623 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.9ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:05:25,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-10-21 20:05:25,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 28. [2021-10-21 20:05:25,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 states have internal predecessors, (33), 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) [2021-10-21 20:05:25,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2021-10-21 20:05:25,642 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 18 [2021-10-21 20:05:25,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:05:25,642 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2021-10-21 20:05:25,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 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) [2021-10-21 20:05:25,643 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2021-10-21 20:05:25,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-21 20:05:25,645 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:05:25,645 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:05:25,668 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b99aa2-9646-4d72-84ec-c2da4b8dcda5/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-21 20:05:25,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b99aa2-9646-4d72-84ec-c2da4b8dcda5/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 20:05:25,868 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:05:25,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:05:25,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1590720246, now seen corresponding path program 1 times [2021-10-21 20:05:25,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 20:05:25,871 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [614598630] [2021-10-21 20:05:25,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:05:25,871 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 20:05:25,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b99aa2-9646-4d72-84ec-c2da4b8dcda5/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 20:05:25,879 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b99aa2-9646-4d72-84ec-c2da4b8dcda5/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 20:05:25,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b99aa2-9646-4d72-84ec-c2da4b8dcda5/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-21 20:05:25,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:05:25,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-21 20:05:25,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:05:26,068 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-21 20:05:26,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 20:05:26,202 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-21 20:05:26,203 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 20:05:26,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [614598630] [2021-10-21 20:05:26,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [614598630] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-21 20:05:26,204 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:05:26,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-10-21 20:05:26,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028391498] [2021-10-21 20:05:26,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 20:05:26,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 20:05:26,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 20:05:26,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:05:26,211 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 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) [2021-10-21 20:05:26,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:05:26,500 INFO L93 Difference]: Finished difference Result 91 states and 111 transitions. [2021-10-21 20:05:26,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 20:05:26,502 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 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 26 [2021-10-21 20:05:26,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:05:26,503 INFO L225 Difference]: With dead ends: 91 [2021-10-21 20:05:26,503 INFO L226 Difference]: Without dead ends: 70 [2021-10-21 20:05:26,504 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 55.0ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-10-21 20:05:26,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-10-21 20:05:26,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 40. [2021-10-21 20:05:26,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 39 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) [2021-10-21 20:05:26,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2021-10-21 20:05:26,511 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 26 [2021-10-21 20:05:26,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:05:26,511 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2021-10-21 20:05:26,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 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) [2021-10-21 20:05:26,512 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2021-10-21 20:05:26,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-21 20:05:26,513 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:05:26,513 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:05:26,530 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b99aa2-9646-4d72-84ec-c2da4b8dcda5/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-21 20:05:26,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b99aa2-9646-4d72-84ec-c2da4b8dcda5/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 20:05:26,725 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:05:26,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:05:26,726 INFO L82 PathProgramCache]: Analyzing trace with hash -270804906, now seen corresponding path program 2 times [2021-10-21 20:05:26,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 20:05:26,727 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1291067469] [2021-10-21 20:05:26,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 20:05:26,727 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 20:05:26,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b99aa2-9646-4d72-84ec-c2da4b8dcda5/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 20:05:26,729 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b99aa2-9646-4d72-84ec-c2da4b8dcda5/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 20:05:26,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b99aa2-9646-4d72-84ec-c2da4b8dcda5/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-21 20:05:26,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-21 20:05:26,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:05:26,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-21 20:05:26,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:05:27,103 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-10-21 20:05:27,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 20:05:27,348 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-10-21 20:05:27,349 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 20:05:27,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1291067469] [2021-10-21 20:05:27,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1291067469] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 20:05:27,350 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:05:27,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-21 20:05:27,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517232391] [2021-10-21 20:05:27,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 20:05:27,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 20:05:27,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 20:05:27,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:05:27,354 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 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) [2021-10-21 20:05:27,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:05:27,471 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2021-10-21 20:05:27,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 20:05:27,472 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-10-21 20:05:27,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:05:27,473 INFO L225 Difference]: With dead ends: 46 [2021-10-21 20:05:27,473 INFO L226 Difference]: Without dead ends: 42 [2021-10-21 20:05:27,474 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 57.3ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-21 20:05:27,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-10-21 20:05:27,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2021-10-21 20:05:27,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.15) internal successors, (46), 40 states have internal predecessors, (46), 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) [2021-10-21 20:05:27,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2021-10-21 20:05:27,480 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 38 [2021-10-21 20:05:27,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:05:27,480 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2021-10-21 20:05:27,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 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) [2021-10-21 20:05:27,481 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2021-10-21 20:05:27,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-21 20:05:27,482 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:05:27,483 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:05:27,498 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b99aa2-9646-4d72-84ec-c2da4b8dcda5/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-21 20:05:27,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b99aa2-9646-4d72-84ec-c2da4b8dcda5/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 20:05:27,698 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:05:27,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:05:27,699 INFO L82 PathProgramCache]: Analyzing trace with hash 1799835385, now seen corresponding path program 1 times [2021-10-21 20:05:27,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 20:05:27,699 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1400208722] [2021-10-21 20:05:27,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:05:27,700 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 20:05:27,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b99aa2-9646-4d72-84ec-c2da4b8dcda5/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 20:05:27,701 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b99aa2-9646-4d72-84ec-c2da4b8dcda5/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 20:05:27,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b99aa2-9646-4d72-84ec-c2da4b8dcda5/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-21 20:05:27,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:05:27,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-21 20:05:27,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:05:28,028 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-10-21 20:05:28,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 20:05:28,141 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-10-21 20:05:28,142 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 20:05:28,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1400208722] [2021-10-21 20:05:28,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1400208722] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 20:05:28,147 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:05:28,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-21 20:05:28,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021806623] [2021-10-21 20:05:28,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 20:05:28,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 20:05:28,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 20:05:28,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:05:28,149 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:05:28,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:05:28,239 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2021-10-21 20:05:28,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:05:28,240 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-10-21 20:05:28,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:05:28,241 INFO L225 Difference]: With dead ends: 54 [2021-10-21 20:05:28,241 INFO L226 Difference]: Without dead ends: 43 [2021-10-21 20:05:28,241 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 19.2ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:05:28,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-10-21 20:05:28,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-10-21 20:05:28,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.1428571428571428) internal successors, (48), 42 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:05:28,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2021-10-21 20:05:28,248 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 40 [2021-10-21 20:05:28,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:05:28,248 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2021-10-21 20:05:28,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:05:28,249 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2021-10-21 20:05:28,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-10-21 20:05:28,250 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:05:28,250 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:05:28,265 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b99aa2-9646-4d72-84ec-c2da4b8dcda5/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-21 20:05:28,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b99aa2-9646-4d72-84ec-c2da4b8dcda5/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 20:05:28,451 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:05:28,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:05:28,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1856180322, now seen corresponding path program 1 times [2021-10-21 20:05:28,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 20:05:28,452 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [519062308] [2021-10-21 20:05:28,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:05:28,452 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 20:05:28,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b99aa2-9646-4d72-84ec-c2da4b8dcda5/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 20:05:28,453 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b99aa2-9646-4d72-84ec-c2da4b8dcda5/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 20:05:28,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b99aa2-9646-4d72-84ec-c2da4b8dcda5/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-21 20:05:28,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:05:28,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-21 20:05:28,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:05:28,800 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-10-21 20:05:28,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 20:05:28,931 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-10-21 20:05:28,931 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 20:05:28,932 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [519062308] [2021-10-21 20:05:28,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [519062308] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-21 20:05:28,932 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:05:28,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-10-21 20:05:28,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129757355] [2021-10-21 20:05:28,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 20:05:28,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 20:05:28,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 20:05:28,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:05:28,934 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:05:29,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:05:29,118 INFO L93 Difference]: Finished difference Result 98 states and 116 transitions. [2021-10-21 20:05:29,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-21 20:05:29,118 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-10-21 20:05:29,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:05:29,120 INFO L225 Difference]: With dead ends: 98 [2021-10-21 20:05:29,120 INFO L226 Difference]: Without dead ends: 88 [2021-10-21 20:05:29,120 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 91.4ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-10-21 20:05:29,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-10-21 20:05:29,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 52. [2021-10-21 20:05:29,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 51 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:05:29,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2021-10-21 20:05:29,128 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 42 [2021-10-21 20:05:29,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:05:29,128 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2021-10-21 20:05:29,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:05:29,128 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2021-10-21 20:05:29,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-10-21 20:05:29,129 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:05:29,130 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:05:29,150 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b99aa2-9646-4d72-84ec-c2da4b8dcda5/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-21 20:05:29,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b99aa2-9646-4d72-84ec-c2da4b8dcda5/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 20:05:29,330 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:05:29,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:05:29,331 INFO L82 PathProgramCache]: Analyzing trace with hash -512239655, now seen corresponding path program 1 times [2021-10-21 20:05:29,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 20:05:29,335 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [443915868] [2021-10-21 20:05:29,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:05:29,335 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 20:05:29,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b99aa2-9646-4d72-84ec-c2da4b8dcda5/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 20:05:29,336 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b99aa2-9646-4d72-84ec-c2da4b8dcda5/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 20:05:29,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b99aa2-9646-4d72-84ec-c2da4b8dcda5/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-21 20:05:29,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:05:29,592 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 20:05:29,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:05:29,768 INFO L133 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2021-10-21 20:05:29,768 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-21 20:05:29,769 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-21 20:05:29,802 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b99aa2-9646-4d72-84ec-c2da4b8dcda5/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-21 20:05:29,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b99aa2-9646-4d72-84ec-c2da4b8dcda5/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 20:05:29,981 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-21 20:05:30,030 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 08:05:30 BoogieIcfgContainer [2021-10-21 20:05:30,034 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-21 20:05:30,035 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-21 20:05:30,035 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-21 20:05:30,035 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-21 20:05:30,036 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 08:05:24" (3/4) ... [2021-10-21 20:05:30,038 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-21 20:05:30,130 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63b99aa2-9646-4d72-84ec-c2da4b8dcda5/bin/uautomizer-j4sWxH34Be/witness.graphml [2021-10-21 20:05:30,131 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-21 20:05:30,133 INFO L168 Benchmark]: Toolchain (without parser) took 6444.76 ms. Allocated memory was 60.8 MB in the beginning and 79.7 MB in the end (delta: 18.9 MB). Free memory was 39.8 MB in the beginning and 43.0 MB in the end (delta: -3.2 MB). Peak memory consumption was 16.6 MB. Max. memory is 16.1 GB. [2021-10-21 20:05:30,133 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 60.8 MB. Free memory is still 41.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 20:05:30,134 INFO L168 Benchmark]: CACSL2BoogieTranslator took 365.16 ms. Allocated memory is still 60.8 MB. Free memory was 39.7 MB in the beginning and 41.8 MB in the end (delta: -2.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-21 20:05:30,135 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.90 ms. Allocated memory is still 60.8 MB. Free memory was 41.8 MB in the beginning and 40.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 20:05:30,136 INFO L168 Benchmark]: Boogie Preprocessor took 30.13 ms. Allocated memory is still 60.8 MB. Free memory was 40.0 MB in the beginning and 38.7 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 20:05:30,136 INFO L168 Benchmark]: RCFGBuilder took 363.48 ms. Allocated memory is still 60.8 MB. Free memory was 38.7 MB in the beginning and 26.8 MB in the end (delta: 11.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-21 20:05:30,140 INFO L168 Benchmark]: TraceAbstraction took 5545.07 ms. Allocated memory was 60.8 MB in the beginning and 79.7 MB in the end (delta: 18.9 MB). Free memory was 26.4 MB in the beginning and 46.6 MB in the end (delta: -20.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 16.1 GB. [2021-10-21 20:05:30,143 INFO L168 Benchmark]: Witness Printer took 96.20 ms. Allocated memory is still 79.7 MB. Free memory was 46.6 MB in the beginning and 43.0 MB in the end (delta: 3.5 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-21 20:05:30,145 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 60.8 MB. Free memory is still 41.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 365.16 ms. Allocated memory is still 60.8 MB. Free memory was 39.7 MB in the beginning and 41.8 MB in the end (delta: -2.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 36.90 ms. Allocated memory is still 60.8 MB. Free memory was 41.8 MB in the beginning and 40.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 30.13 ms. Allocated memory is still 60.8 MB. Free memory was 40.0 MB in the beginning and 38.7 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 363.48 ms. Allocated memory is still 60.8 MB. Free memory was 38.7 MB in the beginning and 26.8 MB in the end (delta: 11.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5545.07 ms. Allocated memory was 60.8 MB in the beginning and 79.7 MB in the end (delta: 18.9 MB). Free memory was 26.4 MB in the beginning and 46.6 MB in the end (delta: -20.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 16.1 GB. * Witness Printer took 96.20 ms. Allocated memory is still 79.7 MB. Free memory was 46.6 MB in the beginning and 43.0 MB in the end (delta: 3.5 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 20]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L31] char string_A[5], string_B[5]; [L32] int i, j, nc_A, nc_B, found=0; [L35] i=0 [L35] COND TRUE i<5 [L36] string_A[i]=__VERIFIER_nondet_char() [L35] i++ [L35] COND TRUE i<5 [L36] string_A[i]=__VERIFIER_nondet_char() [L35] i++ [L35] COND TRUE i<5 [L36] string_A[i]=__VERIFIER_nondet_char() [L35] i++ [L35] COND TRUE i<5 [L36] string_A[i]=__VERIFIER_nondet_char() [L35] i++ [L35] COND TRUE i<5 [L36] string_A[i]=__VERIFIER_nondet_char() [L35] i++ [L35] COND FALSE !(i<5) [L37] EXPR string_A[5 -1] [L37] COND FALSE !(!(string_A[5 -1]=='\0')) [L39] i=0 [L39] COND TRUE i<5 [L40] string_B[i]=__VERIFIER_nondet_char() [L39] i++ [L39] COND TRUE i<5 [L40] string_B[i]=__VERIFIER_nondet_char() [L39] i++ [L39] COND TRUE i<5 [L40] string_B[i]=__VERIFIER_nondet_char() [L39] i++ [L39] COND TRUE i<5 [L40] string_B[i]=__VERIFIER_nondet_char() [L39] i++ [L39] COND TRUE i<5 [L40] string_B[i]=__VERIFIER_nondet_char() [L39] i++ [L39] COND FALSE !(i<5) [L41] EXPR string_B[5 -1] [L41] COND FALSE !(!(string_B[5 -1]=='\0')) [L43] nc_A = 0 [L44] EXPR string_A[nc_A] [L44] COND TRUE string_A[nc_A]!='\0' [L45] nc_A++ [L44] EXPR string_A[nc_A] [L44] COND FALSE !(string_A[nc_A]!='\0') [L47] nc_B = 0 [L48] EXPR string_B[nc_B] [L48] COND TRUE string_B[nc_B]!='\0' [L49] nc_B++ [L48] EXPR string_B[nc_B] [L48] COND FALSE !(string_B[nc_B]!='\0') [L51] COND FALSE !(!(nc_B >= nc_A)) [L54] EXPR j=0 [L54] i=j=0 [L55] COND TRUE (inc_B-1)<