./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/brs3f.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_6c44e027-d019-4f0e-bd02-2430788edcbc/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_6c44e027-d019-4f0e-bd02-2430788edcbc/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_6c44e027-d019-4f0e-bd02-2430788edcbc/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_6c44e027-d019-4f0e-bd02-2430788edcbc/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/brs3f.c -s /tmp/vcloud-vcloud-master/worker/run_dir_6c44e027-d019-4f0e-bd02-2430788edcbc/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_6c44e027-d019-4f0e-bd02-2430788edcbc/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5a6b49f9c2a6d2eda01ab26465c2ce5a73ff1827 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 [2020-11-28 07:36:02,515 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 07:36:02,538 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 07:36:02,592 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 07:36:02,593 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 07:36:02,598 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 07:36:02,601 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 07:36:02,605 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 07:36:02,608 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 07:36:02,614 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 07:36:02,615 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 07:36:02,617 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 07:36:02,618 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 07:36:02,621 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 07:36:02,623 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 07:36:02,625 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 07:36:02,627 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 07:36:02,630 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 07:36:02,634 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 07:36:02,645 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 07:36:02,647 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 07:36:02,648 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 07:36:02,651 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 07:36:02,652 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 07:36:02,661 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 07:36:02,661 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 07:36:02,662 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 07:36:02,664 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 07:36:02,665 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 07:36:02,666 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 07:36:02,667 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 07:36:02,668 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 07:36:02,670 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 07:36:02,670 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 07:36:02,671 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 07:36:02,672 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 07:36:02,672 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 07:36:02,673 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 07:36:02,673 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 07:36:02,674 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 07:36:02,675 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 07:36:02,676 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_6c44e027-d019-4f0e-bd02-2430788edcbc/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-28 07:36:02,724 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 07:36:02,725 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 07:36:02,726 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-28 07:36:02,726 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-28 07:36:02,726 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-28 07:36:02,726 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-28 07:36:02,726 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-28 07:36:02,727 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-28 07:36:02,727 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-28 07:36:02,727 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-28 07:36:02,727 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-28 07:36:02,727 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-28 07:36:02,728 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-28 07:36:02,728 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-28 07:36:02,728 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-28 07:36:02,729 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 07:36:02,729 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 07:36:02,729 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 07:36:02,730 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 07:36:02,730 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 07:36:02,730 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 07:36:02,730 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 07:36:02,730 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 07:36:02,736 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-28 07:36:02,736 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 07:36:02,737 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 07:36:02,737 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 07:36:02,737 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 07:36:02,737 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 07:36:02,738 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 07:36:02,738 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 07:36:02,738 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:36:02,738 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 07:36:02,738 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 07:36:02,739 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 07:36:02,739 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-28 07:36:02,739 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 07:36:02,739 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 07:36:02,739 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 07:36:02,740 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-28 07:36:02,740 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_6c44e027-d019-4f0e-bd02-2430788edcbc/bin/utaipan/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_6c44e027-d019-4f0e-bd02-2430788edcbc/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5a6b49f9c2a6d2eda01ab26465c2ce5a73ff1827 [2020-11-28 07:36:03,019 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 07:36:03,070 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 07:36:03,073 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 07:36:03,075 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 07:36:03,076 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 07:36:03,077 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_6c44e027-d019-4f0e-bd02-2430788edcbc/bin/utaipan/../../sv-benchmarks/c/array-fpi/brs3f.c [2020-11-28 07:36:03,180 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_6c44e027-d019-4f0e-bd02-2430788edcbc/bin/utaipan/data/781268edf/2e03bdf996464d438d5c15d1f64f99e6/FLAG24f02b4e6 [2020-11-28 07:36:03,672 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 07:36:03,672 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_6c44e027-d019-4f0e-bd02-2430788edcbc/sv-benchmarks/c/array-fpi/brs3f.c [2020-11-28 07:36:03,678 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_6c44e027-d019-4f0e-bd02-2430788edcbc/bin/utaipan/data/781268edf/2e03bdf996464d438d5c15d1f64f99e6/FLAG24f02b4e6 [2020-11-28 07:36:04,052 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_6c44e027-d019-4f0e-bd02-2430788edcbc/bin/utaipan/data/781268edf/2e03bdf996464d438d5c15d1f64f99e6 [2020-11-28 07:36:04,055 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 07:36:04,056 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 07:36:04,060 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 07:36:04,061 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 07:36:04,063 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 07:36:04,065 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:36:04" (1/1) ... [2020-11-28 07:36:04,071 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ebb820b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:36:04, skipping insertion in model container [2020-11-28 07:36:04,071 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:36:04" (1/1) ... [2020-11-28 07:36:04,079 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 07:36:04,099 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 07:36:04,278 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:36:04,299 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 07:36:04,322 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:36:04,337 INFO L208 MainTranslator]: Completed translation [2020-11-28 07:36:04,337 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:36:04 WrapperNode [2020-11-28 07:36:04,337 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 07:36:04,339 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 07:36:04,339 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 07:36:04,339 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 07:36:04,348 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:36:04" (1/1) ... [2020-11-28 07:36:04,356 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:36:04" (1/1) ... [2020-11-28 07:36:04,374 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 07:36:04,375 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 07:36:04,375 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 07:36:04,375 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 07:36:04,385 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:36:04" (1/1) ... [2020-11-28 07:36:04,385 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:36:04" (1/1) ... [2020-11-28 07:36:04,388 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:36:04" (1/1) ... [2020-11-28 07:36:04,388 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:36:04" (1/1) ... [2020-11-28 07:36:04,395 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:36:04" (1/1) ... [2020-11-28 07:36:04,399 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:36:04" (1/1) ... [2020-11-28 07:36:04,401 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:36:04" (1/1) ... [2020-11-28 07:36:04,404 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 07:36:04,405 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 07:36:04,405 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 07:36:04,405 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 07:36:04,407 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:36:04" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6c44e027-d019-4f0e-bd02-2430788edcbc/bin/utaipan/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 [2020-11-28 07:36:04,496 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 07:36:04,496 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 07:36:04,496 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-28 07:36:04,497 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-28 07:36:04,497 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 07:36:04,497 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 07:36:04,497 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-28 07:36:04,497 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-28 07:36:05,152 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 07:36:05,153 INFO L298 CfgBuilder]: Removed 12 assume(true) statements. [2020-11-28 07:36:05,155 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:36:05 BoogieIcfgContainer [2020-11-28 07:36:05,155 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 07:36:05,157 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 07:36:05,157 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 07:36:05,164 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 07:36:05,164 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 07:36:04" (1/3) ... [2020-11-28 07:36:05,165 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19821a03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:36:05, skipping insertion in model container [2020-11-28 07:36:05,165 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:36:04" (2/3) ... [2020-11-28 07:36:05,166 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19821a03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:36:05, skipping insertion in model container [2020-11-28 07:36:05,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:36:05" (3/3) ... [2020-11-28 07:36:05,168 INFO L111 eAbstractionObserver]: Analyzing ICFG brs3f.c [2020-11-28 07:36:05,188 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 07:36:05,193 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-28 07:36:05,207 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-28 07:36:05,232 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 07:36:05,233 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 07:36:05,233 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 07:36:05,233 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 07:36:05,233 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 07:36:05,233 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 07:36:05,233 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 07:36:05,233 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 07:36:05,246 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2020-11-28 07:36:05,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-28 07:36:05,252 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:36:05,252 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-28 07:36:05,253 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:36:05,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:36:05,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1381571987, now seen corresponding path program 1 times [2020-11-28 07:36:05,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:36:05,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431020482] [2020-11-28 07:36:05,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:36:05,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:36:05,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:36:05,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431020482] [2020-11-28 07:36:05,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:36:05,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:36:05,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633991681] [2020-11-28 07:36:05,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:36:05,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:36:05,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:36:05,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:36:05,484 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 3 states. [2020-11-28 07:36:05,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:36:05,554 INFO L93 Difference]: Finished difference Result 18 states and 23 transitions. [2020-11-28 07:36:05,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:36:05,558 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-11-28 07:36:05,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:36:05,576 INFO L225 Difference]: With dead ends: 18 [2020-11-28 07:36:05,583 INFO L226 Difference]: Without dead ends: 8 [2020-11-28 07:36:05,587 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:36:05,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2020-11-28 07:36:05,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2020-11-28 07:36:05,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-11-28 07:36:05,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2020-11-28 07:36:05,647 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2020-11-28 07:36:05,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:36:05,648 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2020-11-28 07:36:05,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:36:05,648 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2020-11-28 07:36:05,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-28 07:36:05,649 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:36:05,650 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:36:05,651 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 07:36:05,651 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:36:05,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:36:05,654 INFO L82 PathProgramCache]: Analyzing trace with hash 119262491, now seen corresponding path program 1 times [2020-11-28 07:36:05,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:36:05,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971755531] [2020-11-28 07:36:05,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:36:05,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:36:05,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 07:36:05,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971755531] [2020-11-28 07:36:05,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:36:05,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 07:36:05,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853378152] [2020-11-28 07:36:05,766 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:36:05,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:36:05,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:36:05,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:36:05,768 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand 4 states. [2020-11-28 07:36:05,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:36:05,800 INFO L93 Difference]: Finished difference Result 12 states and 13 transitions. [2020-11-28 07:36:05,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:36:05,802 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-11-28 07:36:05,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:36:05,803 INFO L225 Difference]: With dead ends: 12 [2020-11-28 07:36:05,803 INFO L226 Difference]: Without dead ends: 9 [2020-11-28 07:36:05,804 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:36:05,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2020-11-28 07:36:05,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2020-11-28 07:36:05,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-11-28 07:36:05,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2020-11-28 07:36:05,807 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 7 [2020-11-28 07:36:05,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:36:05,807 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2020-11-28 07:36:05,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:36:05,808 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2020-11-28 07:36:05,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-28 07:36:05,808 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:36:05,808 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:36:05,809 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 07:36:05,809 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:36:05,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:36:05,810 INFO L82 PathProgramCache]: Analyzing trace with hash -597870442, now seen corresponding path program 1 times [2020-11-28 07:36:05,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:36:05,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172945967] [2020-11-28 07:36:05,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:36:05,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:36:05,977 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 07:36:05,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172945967] [2020-11-28 07:36:05,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767775920] [2020-11-28 07:36:05,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6c44e027-d019-4f0e-bd02-2430788edcbc/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:36:06,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:36:06,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-28 07:36:06,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:36:06,135 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-11-28 07:36:06,136 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 07:36:06,149 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 07:36:06,150 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-28 07:36:06,150 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2020-11-28 07:36:06,198 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 07:36:06,214 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 07:36:06,220 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 07:36:06,303 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 07:36:06,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:36:06,333 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-28 07:36:06,341 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-28 07:36:06,373 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-28 07:36:06,412 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 07:36:06,420 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2020-11-28 07:36:06,428 INFO L603 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-11-28 07:36:06,492 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 07:36:06,518 INFO L625 ElimStorePlain]: treesize reduction 5, result has 64.3 percent of original size [2020-11-28 07:36:06,518 INFO L545 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2020-11-28 07:36:06,519 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:34, output treesize:9 [2020-11-28 07:36:06,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 07:36:06,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [20214716] [2020-11-28 07:36:06,594 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-11-28 07:36:06,595 INFO L166 IcfgInterpreter]: Building call graph [2020-11-28 07:36:06,601 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-28 07:36:06,607 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-28 07:36:06,607 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-28 07:36:06,842 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:36:07,134 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:36:07,154 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:36:07,172 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:36:07,414 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:36:07,487 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:36:07,685 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:36:07,911 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-28 07:36:08,170 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 56 [2020-11-28 07:36:08,339 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2020-11-28 07:36:08,543 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 41 [2020-11-28 07:36:08,845 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2020-11-28 07:36:08,848 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:36:08,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-28 07:36:08,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2020-11-28 07:36:08,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626269033] [2020-11-28 07:36:08,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-28 07:36:08,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:36:08,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-28 07:36:08,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-11-28 07:36:08,852 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 10 states. [2020-11-28 07:36:08,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:36:08,929 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2020-11-28 07:36:08,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 07:36:08,930 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 8 [2020-11-28 07:36:08,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:36:08,931 INFO L225 Difference]: With dead ends: 13 [2020-11-28 07:36:08,931 INFO L226 Difference]: Without dead ends: 10 [2020-11-28 07:36:08,932 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-11-28 07:36:08,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-11-28 07:36:08,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-11-28 07:36:08,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-11-28 07:36:08,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2020-11-28 07:36:08,935 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 8 [2020-11-28 07:36:08,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:36:08,935 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2020-11-28 07:36:08,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-28 07:36:08,935 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2020-11-28 07:36:08,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-28 07:36:08,936 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:36:08,936 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:36:09,139 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-11-28 07:36:09,140 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:36:09,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:36:09,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1354154885, now seen corresponding path program 2 times [2020-11-28 07:36:09,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:36:09,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580236538] [2020-11-28 07:36:09,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:36:09,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:36:09,244 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:36:09,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580236538] [2020-11-28 07:36:09,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350604807] [2020-11-28 07:36:09,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6c44e027-d019-4f0e-bd02-2430788edcbc/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:36:09,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-28 07:36:09,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 07:36:09,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-28 07:36:09,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:36:09,374 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:36:09,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:36:09,394 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:36:09,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [560921701] [2020-11-28 07:36:09,400 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-11-28 07:36:09,400 INFO L166 IcfgInterpreter]: Building call graph [2020-11-28 07:36:09,401 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-28 07:36:09,402 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-28 07:36:09,402 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-28 07:36:09,513 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:36:09,676 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:36:09,691 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:36:09,704 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:36:09,822 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:36:09,929 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:36:10,076 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:36:10,348 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-28 07:36:10,742 WARN L193 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 56 [2020-11-28 07:36:10,916 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2020-11-28 07:36:11,112 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 41 [2020-11-28 07:36:11,466 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2020-11-28 07:36:11,468 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:36:11,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-28 07:36:11,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2020-11-28 07:36:11,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844692518] [2020-11-28 07:36:11,469 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-28 07:36:11,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:36:11,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-28 07:36:11,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-11-28 07:36:11,470 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand 10 states. [2020-11-28 07:36:11,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:36:11,530 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2020-11-28 07:36:11,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-28 07:36:11,531 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2020-11-28 07:36:11,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:36:11,531 INFO L225 Difference]: With dead ends: 17 [2020-11-28 07:36:11,531 INFO L226 Difference]: Without dead ends: 11 [2020-11-28 07:36:11,532 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-11-28 07:36:11,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-11-28 07:36:11,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-11-28 07:36:11,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-11-28 07:36:11,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2020-11-28 07:36:11,535 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 9 [2020-11-28 07:36:11,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:36:11,535 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2020-11-28 07:36:11,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-28 07:36:11,535 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2020-11-28 07:36:11,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-28 07:36:11,536 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:36:11,536 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2020-11-28 07:36:11,736 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:36:11,737 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:36:11,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:36:11,737 INFO L82 PathProgramCache]: Analyzing trace with hash -603772147, now seen corresponding path program 3 times [2020-11-28 07:36:11,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:36:11,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456829920] [2020-11-28 07:36:11,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:36:11,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 07:36:11,812 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 07:36:11,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 07:36:11,899 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 07:36:11,930 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-11-28 07:36:11,930 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-28 07:36:11,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-11-28 07:36:11,971 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 07:36:11 BoogieIcfgContainer [2020-11-28 07:36:11,972 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 07:36:11,972 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 07:36:11,972 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 07:36:11,973 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 07:36:11,973 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:36:05" (3/4) ... [2020-11-28 07:36:11,975 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-28 07:36:12,019 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_6c44e027-d019-4f0e-bd02-2430788edcbc/bin/utaipan/witness.graphml [2020-11-28 07:36:12,019 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 07:36:12,021 INFO L168 Benchmark]: Toolchain (without parser) took 7963.72 ms. Allocated memory was 88.1 MB in the beginning and 157.3 MB in the end (delta: 69.2 MB). Free memory was 55.1 MB in the beginning and 85.1 MB in the end (delta: -30.0 MB). Peak memory consumption was 39.3 MB. Max. memory is 16.1 GB. [2020-11-28 07:36:12,021 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 88.1 MB. Free memory was 47.1 MB in the beginning and 47.0 MB in the end (delta: 39.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:36:12,022 INFO L168 Benchmark]: CACSL2BoogieTranslator took 277.50 ms. Allocated memory was 88.1 MB in the beginning and 107.0 MB in the end (delta: 18.9 MB). Free memory was 55.0 MB in the beginning and 83.0 MB in the end (delta: -28.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-28 07:36:12,022 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.74 ms. Allocated memory is still 107.0 MB. Free memory was 83.0 MB in the beginning and 81.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:36:12,023 INFO L168 Benchmark]: Boogie Preprocessor took 29.04 ms. Allocated memory is still 107.0 MB. Free memory was 81.4 MB in the beginning and 80.4 MB in the end (delta: 997.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:36:12,023 INFO L168 Benchmark]: RCFGBuilder took 750.39 ms. Allocated memory is still 107.0 MB. Free memory was 80.4 MB in the beginning and 56.3 MB in the end (delta: 24.2 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. [2020-11-28 07:36:12,024 INFO L168 Benchmark]: TraceAbstraction took 6814.67 ms. Allocated memory was 107.0 MB in the beginning and 157.3 MB in the end (delta: 50.3 MB). Free memory was 55.8 MB in the beginning and 87.2 MB in the end (delta: -31.5 MB). Peak memory consumption was 21.4 MB. Max. memory is 16.1 GB. [2020-11-28 07:36:12,025 INFO L168 Benchmark]: Witness Printer took 47.20 ms. Allocated memory is still 157.3 MB. Free memory was 87.2 MB in the beginning and 85.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:36:12,028 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 88.1 MB. Free memory was 47.1 MB in the beginning and 47.0 MB in the end (delta: 39.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 277.50 ms. Allocated memory was 88.1 MB in the beginning and 107.0 MB in the end (delta: 18.9 MB). Free memory was 55.0 MB in the beginning and 83.0 MB in the end (delta: -28.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 35.74 ms. Allocated memory is still 107.0 MB. Free memory was 83.0 MB in the beginning and 81.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 29.04 ms. Allocated memory is still 107.0 MB. Free memory was 81.4 MB in the beginning and 80.4 MB in the end (delta: 997.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 750.39 ms. Allocated memory is still 107.0 MB. Free memory was 80.4 MB in the beginning and 56.3 MB in the end (delta: 24.2 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 6814.67 ms. Allocated memory was 107.0 MB in the beginning and 157.3 MB in the end (delta: 50.3 MB). Free memory was 55.8 MB in the beginning and 87.2 MB in the end (delta: -31.5 MB). Peak memory consumption was 21.4 MB. Max. memory is 16.1 GB. * Witness Printer took 47.20 ms. Allocated memory is still 157.3 MB. Free memory was 87.2 MB in the beginning and 85.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 10]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L19] int N; [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L13] COND FALSE !(!cond) [L27] int i; [L28] long long sum[1]; [L29] int *a = malloc(sizeof(int)*N); [L31] i=0 VAL [N=2] [L31] COND TRUE i