./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector-loops/diamond_2-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_38a48bb7-88d1-42c0-a1ba-dd6d5f741354/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_38a48bb7-88d1-42c0-a1ba-dd6d5f741354/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_38a48bb7-88d1-42c0-a1ba-dd6d5f741354/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_38a48bb7-88d1-42c0-a1ba-dd6d5f741354/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/bitvector-loops/diamond_2-1.c -s /tmp/vcloud-vcloud-master/worker/working_dir_38a48bb7-88d1-42c0-a1ba-dd6d5f741354/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_38a48bb7-88d1-42c0-a1ba-dd6d5f741354/bin/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 7aeed2387a92d93d76a9218958b4bab5d23187f1 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 0.1.24-cad4683 [2019-10-22 08:55:20,925 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 08:55:20,927 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 08:55:20,942 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 08:55:20,943 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 08:55:20,943 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 08:55:20,944 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 08:55:20,946 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 08:55:20,947 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 08:55:20,948 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 08:55:20,949 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 08:55:20,950 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 08:55:20,950 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 08:55:20,951 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 08:55:20,952 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 08:55:20,953 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 08:55:20,953 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 08:55:20,954 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 08:55:20,955 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 08:55:20,957 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 08:55:20,958 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 08:55:20,959 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 08:55:20,960 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 08:55:20,960 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 08:55:20,962 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 08:55:20,963 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 08:55:20,963 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 08:55:20,964 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 08:55:20,964 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 08:55:20,965 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 08:55:20,965 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 08:55:20,966 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 08:55:20,966 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 08:55:20,967 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 08:55:20,969 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 08:55:20,970 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 08:55:20,974 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 08:55:20,974 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 08:55:20,974 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 08:55:20,975 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 08:55:20,975 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 08:55:20,976 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_38a48bb7-88d1-42c0-a1ba-dd6d5f741354/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-22 08:55:20,991 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 08:55:20,992 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 08:55:20,993 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-22 08:55:20,993 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-22 08:55:20,993 INFO L138 SettingsManager]: * Use SBE=true [2019-10-22 08:55:20,993 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 08:55:20,993 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 08:55:20,994 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-22 08:55:20,994 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 08:55:20,994 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 08:55:20,994 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 08:55:20,994 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 08:55:20,994 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 08:55:20,995 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 08:55:20,995 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 08:55:20,995 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-22 08:55:20,995 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 08:55:20,995 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 08:55:20,996 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 08:55:20,996 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 08:55:20,996 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 08:55:20,996 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 08:55:20,996 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 08:55:20,996 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 08:55:20,997 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 08:55:20,997 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-22 08:55:20,997 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-22 08:55:20,997 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 08:55:20,997 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_38a48bb7-88d1-42c0-a1ba-dd6d5f741354/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__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 -> 7aeed2387a92d93d76a9218958b4bab5d23187f1 [2019-10-22 08:55:21,036 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 08:55:21,045 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 08:55:21,048 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 08:55:21,050 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 08:55:21,050 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 08:55:21,051 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_38a48bb7-88d1-42c0-a1ba-dd6d5f741354/bin/uautomizer/../../sv-benchmarks/c/bitvector-loops/diamond_2-1.c [2019-10-22 08:55:21,104 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_38a48bb7-88d1-42c0-a1ba-dd6d5f741354/bin/uautomizer/data/206d9e098/251b5145a92f47998f2e51ad73849024/FLAGdc8026db7 [2019-10-22 08:55:21,469 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 08:55:21,469 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_38a48bb7-88d1-42c0-a1ba-dd6d5f741354/sv-benchmarks/c/bitvector-loops/diamond_2-1.c [2019-10-22 08:55:21,475 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_38a48bb7-88d1-42c0-a1ba-dd6d5f741354/bin/uautomizer/data/206d9e098/251b5145a92f47998f2e51ad73849024/FLAGdc8026db7 [2019-10-22 08:55:21,487 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_38a48bb7-88d1-42c0-a1ba-dd6d5f741354/bin/uautomizer/data/206d9e098/251b5145a92f47998f2e51ad73849024 [2019-10-22 08:55:21,489 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 08:55:21,490 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 08:55:21,491 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 08:55:21,492 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 08:55:21,495 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 08:55:21,496 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 08:55:21" (1/1) ... [2019-10-22 08:55:21,498 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@587b9e09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:55:21, skipping insertion in model container [2019-10-22 08:55:21,499 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 08:55:21" (1/1) ... [2019-10-22 08:55:21,506 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 08:55:21,523 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 08:55:21,658 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 08:55:21,662 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 08:55:21,742 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 08:55:21,755 INFO L192 MainTranslator]: Completed translation [2019-10-22 08:55:21,755 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:55:21 WrapperNode [2019-10-22 08:55:21,756 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 08:55:21,756 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 08:55:21,757 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 08:55:21,757 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 08:55:21,765 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:55:21" (1/1) ... [2019-10-22 08:55:21,770 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:55:21" (1/1) ... [2019-10-22 08:55:21,791 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 08:55:21,791 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 08:55:21,791 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 08:55:21,791 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 08:55:21,801 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:55:21" (1/1) ... [2019-10-22 08:55:21,801 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:55:21" (1/1) ... [2019-10-22 08:55:21,802 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:55:21" (1/1) ... [2019-10-22 08:55:21,802 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:55:21" (1/1) ... [2019-10-22 08:55:21,805 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:55:21" (1/1) ... [2019-10-22 08:55:21,810 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:55:21" (1/1) ... [2019-10-22 08:55:21,819 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:55:21" (1/1) ... [2019-10-22 08:55:21,821 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 08:55:21,821 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 08:55:21,821 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 08:55:21,821 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 08:55:21,822 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:55:21" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_38a48bb7-88d1-42c0-a1ba-dd6d5f741354/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 08:55:21,883 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 08:55:21,883 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 08:55:22,173 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 08:55:22,173 INFO L284 CfgBuilder]: Removed 7 assume(true) statements. [2019-10-22 08:55:22,174 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 08:55:22 BoogieIcfgContainer [2019-10-22 08:55:22,174 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 08:55:22,175 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 08:55:22,175 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 08:55:22,179 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 08:55:22,179 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 08:55:21" (1/3) ... [2019-10-22 08:55:22,180 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e8c7631 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 08:55:22, skipping insertion in model container [2019-10-22 08:55:22,180 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:55:21" (2/3) ... [2019-10-22 08:55:22,180 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e8c7631 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 08:55:22, skipping insertion in model container [2019-10-22 08:55:22,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 08:55:22" (3/3) ... [2019-10-22 08:55:22,182 INFO L109 eAbstractionObserver]: Analyzing ICFG diamond_2-1.c [2019-10-22 08:55:22,201 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 08:55:22,220 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-22 08:55:22,241 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-22 08:55:22,282 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 08:55:22,282 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-22 08:55:22,282 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 08:55:22,282 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 08:55:22,283 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 08:55:22,283 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 08:55:22,283 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 08:55:22,283 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 08:55:22,303 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-10-22 08:55:22,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-10-22 08:55:22,309 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:55:22,310 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-10-22 08:55:22,312 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:55:22,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:55:22,317 INFO L82 PathProgramCache]: Analyzing trace with hash 31771204, now seen corresponding path program 1 times [2019-10-22 08:55:22,329 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:55:22,329 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842507624] [2019-10-22 08:55:22,330 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:55:22,330 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:55:22,330 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:55:22,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:22,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:55:22,439 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842507624] [2019-10-22 08:55:22,440 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:55:22,441 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-22 08:55:22,441 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540252550] [2019-10-22 08:55:22,446 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-22 08:55:22,446 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:55:22,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-22 08:55:22,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-22 08:55:22,461 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2019-10-22 08:55:22,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:55:22,480 INFO L93 Difference]: Finished difference Result 26 states and 38 transitions. [2019-10-22 08:55:22,480 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-22 08:55:22,481 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2019-10-22 08:55:22,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:55:22,490 INFO L225 Difference]: With dead ends: 26 [2019-10-22 08:55:22,490 INFO L226 Difference]: Without dead ends: 16 [2019-10-22 08:55:22,493 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-22 08:55:22,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-10-22 08:55:22,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-10-22 08:55:22,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-10-22 08:55:22,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 26 transitions. [2019-10-22 08:55:22,524 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 26 transitions. Word has length 5 [2019-10-22 08:55:22,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:55:22,524 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 26 transitions. [2019-10-22 08:55:22,525 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-22 08:55:22,525 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 26 transitions. [2019-10-22 08:55:22,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-10-22 08:55:22,525 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:55:22,525 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-10-22 08:55:22,526 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:55:22,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:55:22,526 INFO L82 PathProgramCache]: Analyzing trace with hash 29864580, now seen corresponding path program 1 times [2019-10-22 08:55:22,526 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:55:22,526 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961923187] [2019-10-22 08:55:22,526 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:55:22,527 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:55:22,527 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:55:22,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:22,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:55:22,631 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961923187] [2019-10-22 08:55:22,634 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:55:22,634 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-22 08:55:22,635 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228246901] [2019-10-22 08:55:22,636 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-22 08:55:22,636 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:55:22,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-22 08:55:22,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-22 08:55:22,637 INFO L87 Difference]: Start difference. First operand 16 states and 26 transitions. Second operand 3 states. [2019-10-22 08:55:22,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:55:22,697 INFO L93 Difference]: Finished difference Result 22 states and 33 transitions. [2019-10-22 08:55:22,697 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-22 08:55:22,698 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2019-10-22 08:55:22,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:55:22,699 INFO L225 Difference]: With dead ends: 22 [2019-10-22 08:55:22,700 INFO L226 Difference]: Without dead ends: 18 [2019-10-22 08:55:22,700 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-22 08:55:22,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-10-22 08:55:22,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2019-10-22 08:55:22,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-10-22 08:55:22,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 27 transitions. [2019-10-22 08:55:22,705 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 27 transitions. Word has length 5 [2019-10-22 08:55:22,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:55:22,705 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 27 transitions. [2019-10-22 08:55:22,706 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-22 08:55:22,706 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 27 transitions. [2019-10-22 08:55:22,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-22 08:55:22,706 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:55:22,707 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:55:22,707 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:55:22,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:55:22,707 INFO L82 PathProgramCache]: Analyzing trace with hash -1273519218, now seen corresponding path program 1 times [2019-10-22 08:55:22,708 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:55:22,708 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892311354] [2019-10-22 08:55:22,708 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:55:22,708 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:55:22,708 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:55:22,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:24,816 WARN L191 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 27 DAG size of output: 12 [2019-10-22 08:55:24,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:55:24,818 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892311354] [2019-10-22 08:55:24,819 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:55:24,819 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-22 08:55:24,819 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316480550] [2019-10-22 08:55:24,819 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-22 08:55:24,820 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:55:24,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-22 08:55:24,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-22 08:55:24,820 INFO L87 Difference]: Start difference. First operand 17 states and 27 transitions. Second operand 3 states. [2019-10-22 08:55:24,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:55:24,965 INFO L93 Difference]: Finished difference Result 47 states and 77 transitions. [2019-10-22 08:55:24,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-22 08:55:24,968 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2019-10-22 08:55:24,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:55:24,968 INFO L225 Difference]: With dead ends: 47 [2019-10-22 08:55:24,968 INFO L226 Difference]: Without dead ends: 32 [2019-10-22 08:55:24,969 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-22 08:55:24,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-10-22 08:55:24,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2019-10-22 08:55:24,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-22 08:55:24,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 39 transitions. [2019-10-22 08:55:24,973 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 39 transitions. Word has length 16 [2019-10-22 08:55:24,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:55:24,973 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 39 transitions. [2019-10-22 08:55:24,973 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-22 08:55:24,974 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 39 transitions. [2019-10-22 08:55:24,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-22 08:55:24,976 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:55:24,976 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:55:24,976 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:55:24,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:55:24,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1974583796, now seen corresponding path program 1 times [2019-10-22 08:55:24,976 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:55:24,977 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569871149] [2019-10-22 08:55:24,977 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:55:24,977 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:55:24,977 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:55:25,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:25,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:55:25,223 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569871149] [2019-10-22 08:55:25,223 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338941536] [2019-10-22 08:55:25,223 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_38a48bb7-88d1-42c0-a1ba-dd6d5f741354/bin/uautomizer/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 [2019-10-22 08:55:25,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:25,259 INFO L256 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 23 conjunts are in the unsatisfiable core [2019-10-22 08:55:25,263 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:55:25,312 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:55:25,313 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:55:25,313 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-10-22 08:55:25,313 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568140547] [2019-10-22 08:55:25,313 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-22 08:55:25,314 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:55:25,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-22 08:55:25,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2019-10-22 08:55:25,314 INFO L87 Difference]: Start difference. First operand 28 states and 39 transitions. Second operand 14 states. [2019-10-22 08:55:25,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:55:25,558 INFO L93 Difference]: Finished difference Result 45 states and 58 transitions. [2019-10-22 08:55:25,558 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-22 08:55:25,558 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 16 [2019-10-22 08:55:25,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:55:25,559 INFO L225 Difference]: With dead ends: 45 [2019-10-22 08:55:25,559 INFO L226 Difference]: Without dead ends: 41 [2019-10-22 08:55:25,560 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2019-10-22 08:55:25,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-10-22 08:55:25,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2019-10-22 08:55:25,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-10-22 08:55:25,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 51 transitions. [2019-10-22 08:55:25,568 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 51 transitions. Word has length 16 [2019-10-22 08:55:25,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:55:25,568 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 51 transitions. [2019-10-22 08:55:25,568 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-22 08:55:25,568 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 51 transitions. [2019-10-22 08:55:25,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-22 08:55:25,569 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:55:25,569 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:55:25,771 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:55:25,771 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:55:25,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:55:25,771 INFO L82 PathProgramCache]: Analyzing trace with hash 1309266250, now seen corresponding path program 1 times [2019-10-22 08:55:25,771 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:55:25,771 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462820033] [2019-10-22 08:55:25,772 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:55:25,772 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:55:25,772 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:55:25,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:25,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:55:25,866 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462820033] [2019-10-22 08:55:25,866 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:55:25,866 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-22 08:55:25,866 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760156350] [2019-10-22 08:55:25,867 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-22 08:55:25,867 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:55:25,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-22 08:55:25,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-22 08:55:25,867 INFO L87 Difference]: Start difference. First operand 39 states and 51 transitions. Second operand 3 states. [2019-10-22 08:55:25,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:55:25,933 INFO L93 Difference]: Finished difference Result 58 states and 69 transitions. [2019-10-22 08:55:25,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-22 08:55:25,933 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2019-10-22 08:55:25,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:55:25,934 INFO L225 Difference]: With dead ends: 58 [2019-10-22 08:55:25,934 INFO L226 Difference]: Without dead ends: 43 [2019-10-22 08:55:25,935 INFO L600 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 [2019-10-22 08:55:25,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-10-22 08:55:25,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2019-10-22 08:55:25,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-10-22 08:55:25,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2019-10-22 08:55:25,939 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 16 [2019-10-22 08:55:25,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:55:25,939 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2019-10-22 08:55:25,939 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-22 08:55:25,940 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2019-10-22 08:55:25,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-22 08:55:25,940 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:55:25,940 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:55:25,941 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:55:25,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:55:25,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1301479604, now seen corresponding path program 1 times [2019-10-22 08:55:25,941 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:55:25,941 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357797655] [2019-10-22 08:55:25,941 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:55:25,941 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:55:25,942 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:55:25,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:55:25,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:55:25,999 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 08:55:26,000 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-10-22 08:55:26,016 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 08:55:26 BoogieIcfgContainer [2019-10-22 08:55:26,016 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-22 08:55:26,017 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-10-22 08:55:26,017 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-10-22 08:55:26,017 INFO L275 PluginConnector]: Witness Printer initialized [2019-10-22 08:55:26,017 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 08:55:22" (3/4) ... [2019-10-22 08:55:26,020 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-10-22 08:55:26,074 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_38a48bb7-88d1-42c0-a1ba-dd6d5f741354/bin/uautomizer/witness.graphml [2019-10-22 08:55:26,077 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-10-22 08:55:26,078 INFO L168 Benchmark]: Toolchain (without parser) took 4587.79 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 133.7 MB). Free memory was 944.5 MB in the beginning and 970.4 MB in the end (delta: -25.9 MB). Peak memory consumption was 107.8 MB. Max. memory is 11.5 GB. [2019-10-22 08:55:26,079 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 967.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 08:55:26,079 INFO L168 Benchmark]: CACSL2BoogieTranslator took 264.56 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 133.7 MB). Free memory was 944.5 MB in the beginning and 1.1 GB in the end (delta: -183.9 MB). Peak memory consumption was 22.9 MB. Max. memory is 11.5 GB. [2019-10-22 08:55:26,080 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.61 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 08:55:26,082 INFO L168 Benchmark]: Boogie Preprocessor took 29.53 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 08:55:26,083 INFO L168 Benchmark]: RCFGBuilder took 353.37 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 23.7 MB). Peak memory consumption was 23.7 MB. Max. memory is 11.5 GB. [2019-10-22 08:55:26,083 INFO L168 Benchmark]: TraceAbstraction took 3841.26 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 970.4 MB in the end (delta: 134.4 MB). Peak memory consumption was 134.4 MB. Max. memory is 11.5 GB. [2019-10-22 08:55:26,083 INFO L168 Benchmark]: Witness Printer took 60.29 ms. Allocated memory is still 1.2 GB. Free memory is still 970.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 08:55:26,085 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 967.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 264.56 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 133.7 MB). Free memory was 944.5 MB in the beginning and 1.1 GB in the end (delta: -183.9 MB). Peak memory consumption was 22.9 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 34.61 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 29.53 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 353.37 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 23.7 MB). Peak memory consumption was 23.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 3841.26 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 970.4 MB in the end (delta: 134.4 MB). Peak memory consumption was 134.4 MB. Max. memory is 11.5 GB. * Witness Printer took 60.29 ms. Allocated memory is still 1.2 GB. Free memory is still 970.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 6]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] unsigned int x = 0; [L13] unsigned int y = __VERIFIER_nondet_uint(); [L15] COND TRUE x < 99 [L16] COND FALSE !(y % 2 == 0) [L17] x += 2 [L19] COND FALSE !(y % 2 == 0) [L20] x -= 2 [L22] COND FALSE !(y % 2 == 0) [L23] x += 2 [L25] COND FALSE !(y % 2 == 0) [L26] x -= 2 [L28] COND FALSE !(y % 2 == 0) [L29] x += 2 [L31] COND FALSE !(y % 2 == 0) [L32] x -= 4 [L34] COND FALSE !(y % 2 == 0) [L35] x += 4 [L37] COND FALSE !(y % 2 == 0) [L38] x += 2 [L40] COND FALSE !(y % 2 == 0) [L41] x -= 4 [L43] COND FALSE !(y % 2 == 0) [L44] x -= 4 [L15] COND FALSE !(x < 99) [L5] COND TRUE !(cond) [L6] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 19 locations, 1 error locations. Result: UNSAFE, OverallTime: 3.7s, OverallIterations: 6, TraceHistogramMax: 1, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 99 SDtfs, 30 SDslu, 22 SDs, 0 SdLazy, 316 SolverSat, 38 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 2.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=39occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 11 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.5s InterpolantComputationTime, 90 NumberOfCodeBlocks, 90 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 68 ConstructedInterpolants, 0 QuantifiedInterpolants, 5126 SizeOfPredicates, 1 NumberOfNonLiveVariables, 55 ConjunctsInSsa, 23 ConjunctsInUnsatCore, 6 InterpolantComputations, 4 PerfectInterpolantSequences, 2/4 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...