./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/array-examples/standard_sentinel_true-unreach-call.i.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5842f4b8 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_8493e5c6-df88-4377-a4b4-4ccfd1909b6e/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_8493e5c6-df88-4377-a4b4-4ccfd1909b6e/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_8493e5c6-df88-4377-a4b4-4ccfd1909b6e/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_8493e5c6-df88-4377-a4b4-4ccfd1909b6e/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-examples/standard_sentinel_true-unreach-call.i.v+cfa-reducer.c -s /tmp/vcloud-vcloud-master/worker/working_dir_8493e5c6-df88-4377-a4b4-4ccfd1909b6e/bin-2019/uautomizer/config/svcomp-Reach-32bit-PetriAutomizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_8493e5c6-df88-4377-a4b4-4ccfd1909b6e/bin-2019/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c0477f4e5b27a6da26de88eabc674e3fb9f5fd06 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-5842f4b [2018-11-18 12:37:29,411 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-18 12:37:29,413 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-18 12:37:29,419 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-18 12:37:29,420 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-18 12:37:29,420 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-18 12:37:29,421 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-18 12:37:29,422 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-18 12:37:29,423 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-18 12:37:29,424 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-18 12:37:29,424 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-18 12:37:29,425 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-18 12:37:29,425 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-18 12:37:29,426 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-18 12:37:29,427 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-18 12:37:29,427 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-18 12:37:29,428 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-18 12:37:29,429 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-18 12:37:29,430 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-18 12:37:29,431 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-18 12:37:29,432 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-18 12:37:29,433 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-18 12:37:29,434 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-18 12:37:29,434 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-18 12:37:29,435 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-18 12:37:29,435 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-18 12:37:29,436 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-18 12:37:29,436 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-18 12:37:29,437 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-18 12:37:29,438 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-18 12:37:29,438 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-18 12:37:29,438 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-18 12:37:29,438 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-18 12:37:29,438 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-18 12:37:29,439 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-18 12:37:29,440 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-18 12:37:29,440 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_8493e5c6-df88-4377-a4b4-4ccfd1909b6e/bin-2019/uautomizer/config/svcomp-Reach-32bit-PetriAutomizer_Default.epf [2018-11-18 12:37:29,448 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-18 12:37:29,448 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-18 12:37:29,449 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-18 12:37:29,449 INFO L133 SettingsManager]: * Process only entry and re-entry procedures=false [2018-11-18 12:37:29,449 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-18 12:37:29,449 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-18 12:37:29,449 INFO L133 SettingsManager]: * Use SBE=true [2018-11-18 12:37:29,450 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-18 12:37:29,450 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-18 12:37:29,450 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-18 12:37:29,450 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-18 12:37:29,450 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-18 12:37:29,450 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-18 12:37:29,450 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-18 12:37:29,451 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-18 12:37:29,451 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-18 12:37:29,451 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-18 12:37:29,451 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-18 12:37:29,451 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-18 12:37:29,451 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-18 12:37:29,451 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-18 12:37:29,452 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-18 12:37:29,452 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-18 12:37:29,452 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 12:37:29,452 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-18 12:37:29,452 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-18 12:37:29,452 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-18 12:37:29,452 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-18 12:37:29,452 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-18 12:37:29,453 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-18 12:37:29,453 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true 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/working_dir_8493e5c6-df88-4377-a4b4-4ccfd1909b6e/bin-2019/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(__VERIFIER_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 -> c0477f4e5b27a6da26de88eabc674e3fb9f5fd06 [2018-11-18 12:37:29,474 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-18 12:37:29,482 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-18 12:37:29,483 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-18 12:37:29,484 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-18 12:37:29,484 INFO L276 PluginConnector]: CDTParser initialized [2018-11-18 12:37:29,485 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_8493e5c6-df88-4377-a4b4-4ccfd1909b6e/bin-2019/uautomizer/../../sv-benchmarks/c/array-examples/standard_sentinel_true-unreach-call.i.v+cfa-reducer.c [2018-11-18 12:37:29,519 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_8493e5c6-df88-4377-a4b4-4ccfd1909b6e/bin-2019/uautomizer/data/de615229a/5260611e60f94f6898fd76a6129c2c00/FLAG42e727d8f [2018-11-18 12:37:29,813 INFO L307 CDTParser]: Found 1 translation units. [2018-11-18 12:37:29,814 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_8493e5c6-df88-4377-a4b4-4ccfd1909b6e/sv-benchmarks/c/array-examples/standard_sentinel_true-unreach-call.i.v+cfa-reducer.c [2018-11-18 12:37:29,818 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_8493e5c6-df88-4377-a4b4-4ccfd1909b6e/bin-2019/uautomizer/data/de615229a/5260611e60f94f6898fd76a6129c2c00/FLAG42e727d8f [2018-11-18 12:37:29,826 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_8493e5c6-df88-4377-a4b4-4ccfd1909b6e/bin-2019/uautomizer/data/de615229a/5260611e60f94f6898fd76a6129c2c00 [2018-11-18 12:37:29,828 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-18 12:37:29,829 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-18 12:37:29,829 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-18 12:37:29,829 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-18 12:37:29,831 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-18 12:37:29,832 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 12:37:29" (1/1) ... [2018-11-18 12:37:29,833 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65ec56fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:37:29, skipping insertion in model container [2018-11-18 12:37:29,834 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 12:37:29" (1/1) ... [2018-11-18 12:37:29,839 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-18 12:37:29,852 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-18 12:37:29,949 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 12:37:29,951 INFO L191 MainTranslator]: Completed pre-run [2018-11-18 12:37:29,962 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 12:37:29,973 INFO L195 MainTranslator]: Completed translation [2018-11-18 12:37:29,973 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:37:29 WrapperNode [2018-11-18 12:37:29,973 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-18 12:37:29,973 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-18 12:37:29,973 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-18 12:37:29,974 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-18 12:37:29,984 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:37:29" (1/1) ... [2018-11-18 12:37:29,985 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:37:29" (1/1) ... [2018-11-18 12:37:29,991 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:37:29" (1/1) ... [2018-11-18 12:37:29,991 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:37:29" (1/1) ... [2018-11-18 12:37:29,996 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:37:29" (1/1) ... [2018-11-18 12:37:29,998 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:37:29" (1/1) ... [2018-11-18 12:37:29,999 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:37:29" (1/1) ... [2018-11-18 12:37:30,000 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-18 12:37:30,000 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-18 12:37:30,000 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-18 12:37:30,000 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-18 12:37:30,001 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:37:29" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8493e5c6-df88-4377-a4b4-4ccfd1909b6e/bin-2019/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 [2018-11-18 12:37:30,073 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-18 12:37:30,073 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-18 12:37:30,073 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-18 12:37:30,073 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-11-18 12:37:30,073 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-11-18 12:37:30,073 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-11-18 12:37:30,073 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-18 12:37:30,074 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-11-18 12:37:30,074 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-11-18 12:37:30,074 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2018-11-18 12:37:30,074 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-11-18 12:37:30,074 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-18 12:37:30,074 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-18 12:37:30,074 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2018-11-18 12:37:30,196 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-18 12:37:30,196 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 12:37:30 BoogieIcfgContainer [2018-11-18 12:37:30,196 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-18 12:37:30,197 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-18 12:37:30,197 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-18 12:37:30,199 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-18 12:37:30,199 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 12:37:29" (1/3) ... [2018-11-18 12:37:30,200 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2814a28d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 12:37:30, skipping insertion in model container [2018-11-18 12:37:30,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:37:29" (2/3) ... [2018-11-18 12:37:30,201 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2814a28d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 12:37:30, skipping insertion in model container [2018-11-18 12:37:30,201 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 12:37:30" (3/3) ... [2018-11-18 12:37:30,202 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_sentinel_true-unreach-call.i.v+cfa-reducer.c [2018-11-18 12:37:30,210 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-18 12:37:30,216 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-18 12:37:30,228 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-18 12:37:30,253 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-18 12:37:30,253 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-18 12:37:30,254 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-18 12:37:30,254 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-18 12:37:30,254 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-18 12:37:30,254 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-18 12:37:30,254 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-18 12:37:30,254 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-18 12:37:30,254 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-18 12:37:30,268 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2018-11-18 12:37:30,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-11-18 12:37:30,273 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:37:30,274 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:37:30,277 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:37:30,282 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:37:30,282 INFO L82 PathProgramCache]: Analyzing trace with hash -920288751, now seen corresponding path program 1 times [2018-11-18 12:37:30,284 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:37:30,284 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:37:30,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:37:30,325 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:37:30,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:37:30,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:37:30,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:37:30,442 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 12:37:30,442 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-18 12:37:30,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 12:37:30,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 12:37:30,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-11-18 12:37:30,453 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 5 states. [2018-11-18 12:37:30,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:37:30,520 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2018-11-18 12:37:30,520 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 12:37:30,521 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2018-11-18 12:37:30,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:37:30,527 INFO L225 Difference]: With dead ends: 30 [2018-11-18 12:37:30,527 INFO L226 Difference]: Without dead ends: 15 [2018-11-18 12:37:30,529 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-11-18 12:37:30,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-11-18 12:37:30,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-11-18 12:37:30,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-11-18 12:37:30,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-11-18 12:37:30,551 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2018-11-18 12:37:30,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:37:30,551 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-11-18 12:37:30,551 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 12:37:30,551 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-11-18 12:37:30,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-11-18 12:37:30,551 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:37:30,552 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:37:30,552 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:37:30,552 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:37:30,552 INFO L82 PathProgramCache]: Analyzing trace with hash 363684724, now seen corresponding path program 1 times [2018-11-18 12:37:30,552 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:37:30,552 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:37:30,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:37:30,553 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:37:30,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:37:30,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:37:30,796 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:37:30,796 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:37:30,796 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8493e5c6-df88-4377-a4b4-4ccfd1909b6e/bin-2019/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 12:37:30,808 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:37:30,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:37:30,827 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:37:30,863 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 12 [2018-11-18 12:37:30,865 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2018-11-18 12:37:30,865 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-18 12:37:30,867 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 12:37:30,871 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-11-18 12:37:30,871 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2018-11-18 12:37:30,889 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2018-11-18 12:37:30,900 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 16 [2018-11-18 12:37:30,901 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2018-11-18 12:37:30,906 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2018-11-18 12:37:30,913 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2018-11-18 12:37:30,913 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:29, output treesize:30 [2018-11-18 12:37:30,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:37:30,983 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:37:30,983 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2018-11-18 12:37:30,983 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-18 12:37:30,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-18 12:37:30,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2018-11-18 12:37:30,984 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 13 states. [2018-11-18 12:37:31,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:37:31,081 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-11-18 12:37:31,081 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-18 12:37:31,081 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 14 [2018-11-18 12:37:31,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:37:31,082 INFO L225 Difference]: With dead ends: 20 [2018-11-18 12:37:31,082 INFO L226 Difference]: Without dead ends: 17 [2018-11-18 12:37:31,083 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2018-11-18 12:37:31,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-11-18 12:37:31,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-11-18 12:37:31,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-11-18 12:37:31,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-11-18 12:37:31,086 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2018-11-18 12:37:31,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:37:31,087 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-11-18 12:37:31,087 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-18 12:37:31,087 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-11-18 12:37:31,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-11-18 12:37:31,087 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:37:31,087 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:37:31,088 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:37:31,088 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:37:31,088 INFO L82 PathProgramCache]: Analyzing trace with hash 1606580247, now seen corresponding path program 2 times [2018-11-18 12:37:31,088 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:37:31,088 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:37:31,089 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:37:31,089 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:37:31,089 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:37:31,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:37:31,396 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:37:31,396 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:37:31,397 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8493e5c6-df88-4377-a4b4-4ccfd1909b6e/bin-2019/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 12:37:31,403 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-18 12:37:31,417 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-18 12:37:31,418 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:37:31,420 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:37:31,431 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 12 [2018-11-18 12:37:31,434 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2018-11-18 12:37:31,435 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-18 12:37:31,438 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 12:37:31,442 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-11-18 12:37:31,443 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2018-11-18 12:37:31,483 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2018-11-18 12:37:31,495 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 41 [2018-11-18 12:37:31,496 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2018-11-18 12:37:31,509 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2018-11-18 12:37:31,531 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2018-11-18 12:37:31,531 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:37, output treesize:58 [2018-11-18 12:37:31,591 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:37:31,614 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:37:31,614 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2018-11-18 12:37:31,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-18 12:37:31,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-18 12:37:31,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2018-11-18 12:37:31,615 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 17 states. [2018-11-18 12:37:31,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:37:31,904 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-11-18 12:37:31,904 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-18 12:37:31,905 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 16 [2018-11-18 12:37:31,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:37:31,905 INFO L225 Difference]: With dead ends: 25 [2018-11-18 12:37:31,905 INFO L226 Difference]: Without dead ends: 21 [2018-11-18 12:37:31,905 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=139, Invalid=413, Unknown=0, NotChecked=0, Total=552 [2018-11-18 12:37:31,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-11-18 12:37:31,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-11-18 12:37:31,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-11-18 12:37:31,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-11-18 12:37:31,908 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 16 [2018-11-18 12:37:31,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:37:31,908 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-11-18 12:37:31,908 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-18 12:37:31,908 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-11-18 12:37:31,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-11-18 12:37:31,909 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:37:31,909 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:37:31,909 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:37:31,909 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:37:31,909 INFO L82 PathProgramCache]: Analyzing trace with hash -750191843, now seen corresponding path program 3 times [2018-11-18 12:37:31,909 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:37:31,909 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:37:31,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:37:31,910 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 12:37:31,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:37:31,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:37:32,255 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-18 12:37:32,256 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:37:32,256 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8493e5c6-df88-4377-a4b4-4ccfd1909b6e/bin-2019/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 12:37:32,262 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 12:37:32,276 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-11-18 12:37:32,276 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:37:32,277 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:37:32,288 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 12 [2018-11-18 12:37:32,290 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2018-11-18 12:37:32,290 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-18 12:37:32,291 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 12:37:32,294 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-11-18 12:37:32,294 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2018-11-18 12:37:34,017 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 45 [2018-11-18 12:37:34,051 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 45 treesize of output 145 [2018-11-18 12:37:34,051 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2018-11-18 12:37:34,089 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 72 xjuncts. [2018-11-18 12:37:34,291 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2018-11-18 12:37:34,317 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 12 dim-0 vars, and 2 xjuncts. [2018-11-18 12:37:34,317 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:71, output treesize:417 [2018-11-18 12:37:34,434 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:37:34,449 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:37:34,450 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2018-11-18 12:37:34,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-11-18 12:37:34,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-11-18 12:37:34,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=395, Unknown=5, NotChecked=0, Total=506 [2018-11-18 12:37:34,450 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 23 states. [2018-11-18 12:37:34,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:37:34,950 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2018-11-18 12:37:34,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-11-18 12:37:34,950 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 20 [2018-11-18 12:37:34,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:37:34,950 INFO L225 Difference]: With dead ends: 24 [2018-11-18 12:37:34,951 INFO L226 Difference]: Without dead ends: 0 [2018-11-18 12:37:34,951 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=304, Invalid=951, Unknown=5, NotChecked=0, Total=1260 [2018-11-18 12:37:34,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-18 12:37:34,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-18 12:37:34,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-18 12:37:34,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-18 12:37:34,952 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 20 [2018-11-18 12:37:34,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:37:34,952 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-18 12:37:34,952 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-11-18 12:37:34,952 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-18 12:37:34,952 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-18 12:37:34,955 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-18 12:37:35,011 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2018-11-18 12:37:35,011 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2018-11-18 12:37:35,011 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-18 12:37:35,012 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-18 12:37:35,012 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-18 12:37:35,012 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-18 12:37:35,012 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-18 12:37:35,012 INFO L425 ceAbstractionStarter]: For program point L33(lines 33 42) no Hoare annotation was computed. [2018-11-18 12:37:35,012 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 7 55) the Hoare annotation is: true [2018-11-18 12:37:35,012 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 7 55) no Hoare annotation was computed. [2018-11-18 12:37:35,012 INFO L421 ceAbstractionStarter]: At program point L24(lines 17 45) the Hoare annotation is: (let ((.cse1 (* 4 main_~main__pos~0))) (let ((.cse0 (select |#memory_int| |main_~#main__a~0.base|)) (.cse2 (+ |main_~#main__a~0.offset| .cse1)) (.cse3 (= |main_~#main__a~0.offset| 0)) (.cse4 (< 0 (+ |main_~#main__a~0.offset| .cse1 1)))) (or (and (= main_~main__marker~0 (select .cse0 (+ .cse1 |main_~#main__a~0.offset|))) (not (= .cse2 0)) .cse3 .cse4 (< main_~main__i~0 (+ main_~main__pos~0 1))) (and (= main_~main__marker~0 (select .cse0 .cse2)) (= main_~main__i~0 0) .cse3 .cse4)))) [2018-11-18 12:37:35,012 INFO L425 ceAbstractionStarter]: For program point L21(lines 21 44) no Hoare annotation was computed. [2018-11-18 12:37:35,012 INFO L425 ceAbstractionStarter]: For program point L16(lines 16 49) no Hoare annotation was computed. [2018-11-18 12:37:35,012 INFO L425 ceAbstractionStarter]: For program point L14(lines 14 54) no Hoare annotation was computed. [2018-11-18 12:37:35,013 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 7 55) no Hoare annotation was computed. [2018-11-18 12:37:35,013 INFO L425 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 35) no Hoare annotation was computed. [2018-11-18 12:37:35,013 INFO L425 ceAbstractionStarter]: For program point L35(line 35) no Hoare annotation was computed. [2018-11-18 12:37:35,017 WARN L1239 BoogieBacktranslator]: unknown boogie variable #memory_int [2018-11-18 12:37:35,018 WARN L1239 BoogieBacktranslator]: unknown boogie variable #memory_int [2018-11-18 12:37:35,021 WARN L1239 BoogieBacktranslator]: unknown boogie variable #memory_int [2018-11-18 12:37:35,021 WARN L1239 BoogieBacktranslator]: unknown boogie variable #memory_int [2018-11-18 12:37:35,023 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.11 12:37:35 BoogieIcfgContainer [2018-11-18 12:37:35,023 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-18 12:37:35,023 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-18 12:37:35,023 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-18 12:37:35,023 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-18 12:37:35,024 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 12:37:30" (3/4) ... [2018-11-18 12:37:35,026 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-18 12:37:35,031 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-18 12:37:35,031 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-18 12:37:35,035 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2018-11-18 12:37:35,035 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-11-18 12:37:35,035 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-18 12:37:35,066 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_8493e5c6-df88-4377-a4b4-4ccfd1909b6e/bin-2019/uautomizer/witness.graphml [2018-11-18 12:37:35,066 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-18 12:37:35,067 INFO L168 Benchmark]: Toolchain (without parser) took 5238.53 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 141.0 MB). Free memory was 959.1 MB in the beginning and 932.3 MB in the end (delta: 26.9 MB). Peak memory consumption was 167.9 MB. Max. memory is 11.5 GB. [2018-11-18 12:37:35,067 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 12:37:35,068 INFO L168 Benchmark]: CACSL2BoogieTranslator took 144.22 ms. Allocated memory is still 1.0 GB. Free memory was 959.1 MB in the beginning and 948.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-18 12:37:35,068 INFO L168 Benchmark]: Boogie Preprocessor took 26.51 ms. Allocated memory is still 1.0 GB. Free memory was 948.4 MB in the beginning and 945.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-18 12:37:35,068 INFO L168 Benchmark]: RCFGBuilder took 196.29 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 103.3 MB). Free memory was 945.7 MB in the beginning and 1.1 GB in the end (delta: -140.8 MB). Peak memory consumption was 14.3 MB. Max. memory is 11.5 GB. [2018-11-18 12:37:35,069 INFO L168 Benchmark]: TraceAbstraction took 4826.18 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 37.7 MB). Free memory was 1.1 GB in the beginning and 937.0 MB in the end (delta: 146.8 MB). Peak memory consumption was 184.5 MB. Max. memory is 11.5 GB. [2018-11-18 12:37:35,069 INFO L168 Benchmark]: Witness Printer took 42.90 ms. Allocated memory is still 1.2 GB. Free memory was 937.0 MB in the beginning and 932.3 MB in the end (delta: 4.7 MB). Peak memory consumption was 4.7 MB. Max. memory is 11.5 GB. [2018-11-18 12:37:35,071 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 144.22 ms. Allocated memory is still 1.0 GB. Free memory was 959.1 MB in the beginning and 948.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 26.51 ms. Allocated memory is still 1.0 GB. Free memory was 948.4 MB in the beginning and 945.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 196.29 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 103.3 MB). Free memory was 945.7 MB in the beginning and 1.1 GB in the end (delta: -140.8 MB). Peak memory consumption was 14.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 4826.18 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 37.7 MB). Free memory was 1.1 GB in the beginning and 937.0 MB in the end (delta: 146.8 MB). Peak memory consumption was 184.5 MB. Max. memory is 11.5 GB. * Witness Printer took 42.90 ms. Allocated memory is still 1.2 GB. Free memory was 937.0 MB in the beginning and 932.3 MB in the end (delta: 4.7 MB). Peak memory consumption was 4.7 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 35]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 17]: Loop Invariant [2018-11-18 12:37:35,075 WARN L1239 BoogieBacktranslator]: unknown boogie variable #memory_int [2018-11-18 12:37:35,075 WARN L1239 BoogieBacktranslator]: unknown boogie variable #memory_int [2018-11-18 12:37:35,076 WARN L1239 BoogieBacktranslator]: unknown boogie variable #memory_int [2018-11-18 12:37:35,076 WARN L1239 BoogieBacktranslator]: unknown boogie variable #memory_int Derived loop invariant: ((((main__marker == unknown-#memory_int-unknown[main__a][4 * main__pos + main__a] && !(main__a + 4 * main__pos == 0)) && main__a == 0) && 0 < main__a + 4 * main__pos + 1) && main__i < main__pos + 1) || (((main__marker == unknown-#memory_int-unknown[main__a][main__a + 4 * main__pos] && main__i == 0) && main__a == 0) && 0 < main__a + 4 * main__pos + 1) - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 17 locations, 1 error locations. SAFE Result, 4.7s OverallTime, 4 OverallIterations, 5 TraceHistogramMax, 0.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 42 SDtfs, 125 SDslu, 133 SDs, 0 SdLazy, 214 SolverSat, 69 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 111 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 3.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 5 PreInvPairs, 10 NumberOfFragments, 67 HoareAnnotationTreeSize, 5 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 283 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 3.3s InterpolantComputationTime, 112 NumberOfCodeBlocks, 112 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 105 ConstructedInterpolants, 3 QuantifiedInterpolants, 23663 SizeOfPredicates, 24 NumberOfNonLiveVariables, 257 ConjunctsInSsa, 62 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 2/56 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...