./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/array-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_45a4d9ce-ff2c-447c-892b-0cd79d27f371/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_45a4d9ce-ff2c-447c-892b-0cd79d27f371/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_45a4d9ce-ff2c-447c-892b-0cd79d27f371/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_45a4d9ce-ff2c-447c-892b-0cd79d27f371/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops/array-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_45a4d9ce-ff2c-447c-892b-0cd79d27f371/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_45a4d9ce-ff2c-447c-892b-0cd79d27f371/bin/uautomizer --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 a4c882ea31ded5d72491d0989b7efed83bec9369 ............................................................................................................................................................................................................................................................................................................................. 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 0.2.0-a4ecdab [2020-11-29 23:38:34,349 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 23:38:34,352 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 23:38:34,468 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 23:38:34,468 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 23:38:34,470 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 23:38:34,475 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 23:38:34,478 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 23:38:34,482 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 23:38:34,483 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 23:38:34,485 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 23:38:34,486 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 23:38:34,487 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 23:38:34,489 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 23:38:34,490 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 23:38:34,492 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 23:38:34,493 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 23:38:34,495 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 23:38:34,497 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 23:38:34,500 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 23:38:34,503 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 23:38:34,504 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 23:38:34,506 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 23:38:34,507 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 23:38:34,511 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 23:38:34,512 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 23:38:34,513 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 23:38:34,514 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 23:38:34,514 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 23:38:34,516 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 23:38:34,516 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 23:38:34,518 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 23:38:34,519 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 23:38:34,520 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 23:38:34,521 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 23:38:34,522 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 23:38:34,523 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 23:38:34,524 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 23:38:34,524 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 23:38:34,526 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 23:38:34,527 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 23:38:34,528 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_45a4d9ce-ff2c-447c-892b-0cd79d27f371/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-29 23:38:34,554 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 23:38:34,554 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 23:38:34,555 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 23:38:34,556 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 23:38:34,556 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 23:38:34,556 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 23:38:34,557 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 23:38:34,557 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 23:38:34,557 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 23:38:34,557 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 23:38:34,558 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-29 23:38:34,558 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 23:38:34,558 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-29 23:38:34,558 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 23:38:34,559 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 23:38:34,559 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 23:38:34,559 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-29 23:38:34,559 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 23:38:34,560 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 23:38:34,560 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 23:38:34,560 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 23:38:34,560 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 23:38:34,561 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 23:38:34,561 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 23:38:34,561 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-29 23:38:34,562 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 23:38:34,562 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 23:38:34,562 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-29 23:38:34,562 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 23:38:34,563 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-vcloud-master/worker/run_dir_45a4d9ce-ff2c-447c-892b-0cd79d27f371/bin/uautomizer/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_45a4d9ce-ff2c-447c-892b-0cd79d27f371/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a4c882ea31ded5d72491d0989b7efed83bec9369 [2020-11-29 23:38:34,844 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 23:38:34,875 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 23:38:34,877 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 23:38:34,879 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 23:38:34,881 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 23:38:34,883 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_45a4d9ce-ff2c-447c-892b-0cd79d27f371/bin/uautomizer/../../sv-benchmarks/c/loops/array-2.c [2020-11-29 23:38:34,968 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_45a4d9ce-ff2c-447c-892b-0cd79d27f371/bin/uautomizer/data/f31d2d5d6/2f2dec5014e6440b871868222d4641fb/FLAG96ab4a3d7 [2020-11-29 23:38:35,531 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 23:38:35,533 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_45a4d9ce-ff2c-447c-892b-0cd79d27f371/sv-benchmarks/c/loops/array-2.c [2020-11-29 23:38:35,544 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_45a4d9ce-ff2c-447c-892b-0cd79d27f371/bin/uautomizer/data/f31d2d5d6/2f2dec5014e6440b871868222d4641fb/FLAG96ab4a3d7 [2020-11-29 23:38:35,884 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_45a4d9ce-ff2c-447c-892b-0cd79d27f371/bin/uautomizer/data/f31d2d5d6/2f2dec5014e6440b871868222d4641fb [2020-11-29 23:38:35,886 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 23:38:35,888 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 23:38:35,890 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 23:38:35,890 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 23:38:35,896 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 23:38:35,898 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 11:38:35" (1/1) ... [2020-11-29 23:38:35,906 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7031ee3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:38:35, skipping insertion in model container [2020-11-29 23:38:35,907 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 11:38:35" (1/1) ... [2020-11-29 23:38:35,916 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 23:38:35,932 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 23:38:36,143 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 23:38:36,157 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 23:38:36,197 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 23:38:36,215 INFO L208 MainTranslator]: Completed translation [2020-11-29 23:38:36,217 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:38:36 WrapperNode [2020-11-29 23:38:36,217 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 23:38:36,219 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 23:38:36,219 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 23:38:36,219 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 23:38:36,226 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:38:36" (1/1) ... [2020-11-29 23:38:36,235 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:38:36" (1/1) ... [2020-11-29 23:38:36,258 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 23:38:36,260 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 23:38:36,260 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 23:38:36,260 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 23:38:36,271 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:38:36" (1/1) ... [2020-11-29 23:38:36,272 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:38:36" (1/1) ... [2020-11-29 23:38:36,274 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:38:36" (1/1) ... [2020-11-29 23:38:36,274 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:38:36" (1/1) ... [2020-11-29 23:38:36,281 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:38:36" (1/1) ... [2020-11-29 23:38:36,285 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:38:36" (1/1) ... [2020-11-29 23:38:36,287 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:38:36" (1/1) ... [2020-11-29 23:38:36,289 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 23:38:36,290 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 23:38:36,291 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 23:38:36,291 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 23:38:36,292 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:38:36" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_45a4d9ce-ff2c-447c-892b-0cd79d27f371/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 23:38:36,374 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 23:38:36,375 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 23:38:36,375 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-29 23:38:36,377 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 23:38:36,377 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 23:38:36,377 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-29 23:38:36,377 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-29 23:38:36,818 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 23:38:36,820 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-11-29 23:38:36,824 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 11:38:36 BoogieIcfgContainer [2020-11-29 23:38:36,824 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 23:38:36,828 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 23:38:36,829 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 23:38:36,832 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 23:38:36,832 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 11:38:35" (1/3) ... [2020-11-29 23:38:36,833 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dfe97be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 11:38:36, skipping insertion in model container [2020-11-29 23:38:36,834 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:38:36" (2/3) ... [2020-11-29 23:38:36,835 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dfe97be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 11:38:36, skipping insertion in model container [2020-11-29 23:38:36,835 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 11:38:36" (3/3) ... [2020-11-29 23:38:36,837 INFO L111 eAbstractionObserver]: Analyzing ICFG array-2.c [2020-11-29 23:38:36,854 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 23:38:36,859 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-29 23:38:36,872 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-29 23:38:36,905 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 23:38:36,905 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-29 23:38:36,905 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 23:38:36,905 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 23:38:36,905 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 23:38:36,906 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 23:38:36,906 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 23:38:36,906 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 23:38:36,918 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states. [2020-11-29 23:38:36,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-29 23:38:36,924 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:38:36,925 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-29 23:38:36,925 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:38:36,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:38:36,932 INFO L82 PathProgramCache]: Analyzing trace with hash 889937703, now seen corresponding path program 1 times [2020-11-29 23:38:36,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:38:36,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596245894] [2020-11-29 23:38:36,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:38:37,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:38:37,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:38:37,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596245894] [2020-11-29 23:38:37,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:38:37,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-29 23:38:37,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562074914] [2020-11-29 23:38:37,109 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-29 23:38:37,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:38:37,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-29 23:38:37,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-29 23:38:37,129 INFO L87 Difference]: Start difference. First operand 14 states. Second operand 2 states. [2020-11-29 23:38:37,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:38:37,147 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2020-11-29 23:38:37,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-29 23:38:37,148 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-11-29 23:38:37,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:38:37,158 INFO L225 Difference]: With dead ends: 22 [2020-11-29 23:38:37,158 INFO L226 Difference]: Without dead ends: 9 [2020-11-29 23:38:37,161 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-29 23:38:37,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2020-11-29 23:38:37,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2020-11-29 23:38:37,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-11-29 23:38:37,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2020-11-29 23:38:37,198 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2020-11-29 23:38:37,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:38:37,198 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2020-11-29 23:38:37,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-29 23:38:37,199 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2020-11-29 23:38:37,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-29 23:38:37,200 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:38:37,200 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-29 23:38:37,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-29 23:38:37,201 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:38:37,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:38:37,202 INFO L82 PathProgramCache]: Analyzing trace with hash 889610002, now seen corresponding path program 1 times [2020-11-29 23:38:37,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:38:37,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059910901] [2020-11-29 23:38:37,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:38:37,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:38:37,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:38:37,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059910901] [2020-11-29 23:38:37,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:38:37,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 23:38:37,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376574091] [2020-11-29 23:38:37,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 23:38:37,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:38:37,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 23:38:37,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 23:38:37,426 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 3 states. [2020-11-29 23:38:37,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:38:37,466 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2020-11-29 23:38:37,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 23:38:37,469 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-11-29 23:38:37,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:38:37,469 INFO L225 Difference]: With dead ends: 16 [2020-11-29 23:38:37,469 INFO L226 Difference]: Without dead ends: 12 [2020-11-29 23:38:37,470 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 23:38:37,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-11-29 23:38:37,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 10. [2020-11-29 23:38:37,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-11-29 23:38:37,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2020-11-29 23:38:37,477 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 6 [2020-11-29 23:38:37,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:38:37,478 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2020-11-29 23:38:37,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 23:38:37,478 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2020-11-29 23:38:37,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-29 23:38:37,480 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:38:37,481 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:38:37,481 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-29 23:38:37,482 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:38:37,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:38:37,484 INFO L82 PathProgramCache]: Analyzing trace with hash -332619814, now seen corresponding path program 1 times [2020-11-29 23:38:37,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:38:37,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840605690] [2020-11-29 23:38:37,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:38:37,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:38:37,569 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:38:37,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:38:37,606 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:38:37,638 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 23:38:37,639 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-29 23:38:37,639 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-29 23:38:37,677 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 11:38:37 BoogieIcfgContainer [2020-11-29 23:38:37,680 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 23:38:37,681 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 23:38:37,681 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 23:38:37,682 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 23:38:37,682 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 11:38:36" (3/4) ... [2020-11-29 23:38:37,685 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-29 23:38:37,754 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_45a4d9ce-ff2c-447c-892b-0cd79d27f371/bin/uautomizer/witness.graphml [2020-11-29 23:38:37,754 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 23:38:37,756 INFO L168 Benchmark]: Toolchain (without parser) took 1867.05 ms. Allocated memory is still 104.9 MB. Free memory was 74.6 MB in the beginning and 69.0 MB in the end (delta: 5.6 MB). Peak memory consumption was 5.6 MB. Max. memory is 16.1 GB. [2020-11-29 23:38:37,760 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 79.7 MB. Free memory was 37.7 MB in the beginning and 37.6 MB in the end (delta: 36.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 23:38:37,761 INFO L168 Benchmark]: CACSL2BoogieTranslator took 327.74 ms. Allocated memory is still 104.9 MB. Free memory was 74.6 MB in the beginning and 82.8 MB in the end (delta: -8.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-29 23:38:37,762 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.75 ms. Allocated memory is still 104.9 MB. Free memory was 82.4 MB in the beginning and 81.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 23:38:37,767 INFO L168 Benchmark]: Boogie Preprocessor took 30.03 ms. Allocated memory is still 104.9 MB. Free memory was 81.1 MB in the beginning and 79.9 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 23:38:37,767 INFO L168 Benchmark]: RCFGBuilder took 534.01 ms. Allocated memory is still 104.9 MB. Free memory was 79.9 MB in the beginning and 67.3 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-29 23:38:37,768 INFO L168 Benchmark]: TraceAbstraction took 852.38 ms. Allocated memory is still 104.9 MB. Free memory was 66.9 MB in the beginning and 70.6 MB in the end (delta: -3.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 23:38:37,768 INFO L168 Benchmark]: Witness Printer took 72.74 ms. Allocated memory is still 104.9 MB. Free memory was 70.6 MB in the beginning and 69.0 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 23:38:37,771 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 79.7 MB. Free memory was 37.7 MB in the beginning and 37.6 MB in the end (delta: 36.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 327.74 ms. Allocated memory is still 104.9 MB. Free memory was 74.6 MB in the beginning and 82.8 MB in the end (delta: -8.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 39.75 ms. Allocated memory is still 104.9 MB. Free memory was 82.4 MB in the beginning and 81.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 30.03 ms. Allocated memory is still 104.9 MB. Free memory was 81.1 MB in the beginning and 79.9 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 534.01 ms. Allocated memory is still 104.9 MB. Free memory was 79.9 MB in the beginning and 67.3 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 852.38 ms. Allocated memory is still 104.9 MB. Free memory was 66.9 MB in the beginning and 70.6 MB in the end (delta: -3.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 72.74 ms. Allocated memory is still 104.9 MB. Free memory was 70.6 MB in the beginning and 69.0 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L15] unsigned int SIZE=1; [L16] unsigned int j,k; [L17] int array[SIZE], menor; [L19] menor = __VERIFIER_nondet_int() [L21] j=0 [L21] COND TRUE j