./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/sum01_bug02.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b5699aa Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_dfea410e-5a01-4771-94ba-99ca97538bf8/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_dfea410e-5a01-4771-94ba-99ca97538bf8/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_dfea410e-5a01-4771-94ba-99ca97538bf8/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_dfea410e-5a01-4771-94ba-99ca97538bf8/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops/sum01_bug02.i -s /tmp/vcloud-vcloud-master/worker/run_dir_dfea410e-5a01-4771-94ba-99ca97538bf8/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_dfea410e-5a01-4771-94ba-99ca97538bf8/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 c5465a084053aead702161d951dd339bfa1665d5 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 0.1.24-6b5699a [2019-11-25 08:48:54,671 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-25 08:48:54,673 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-25 08:48:54,684 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-25 08:48:54,684 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-25 08:48:54,685 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-25 08:48:54,686 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-25 08:48:54,688 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-25 08:48:54,690 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-25 08:48:54,691 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-25 08:48:54,692 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-25 08:48:54,693 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-25 08:48:54,693 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-25 08:48:54,694 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-25 08:48:54,695 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-25 08:48:54,696 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-25 08:48:54,697 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-25 08:48:54,698 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-25 08:48:54,700 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-25 08:48:54,702 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-25 08:48:54,703 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-25 08:48:54,705 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-25 08:48:54,706 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-25 08:48:54,707 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-25 08:48:54,712 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-25 08:48:54,712 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-25 08:48:54,713 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-25 08:48:54,714 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-25 08:48:54,714 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-25 08:48:54,715 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-25 08:48:54,715 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-25 08:48:54,716 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-25 08:48:54,716 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-25 08:48:54,717 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-25 08:48:54,718 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-25 08:48:54,718 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-25 08:48:54,719 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-25 08:48:54,719 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-25 08:48:54,719 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-25 08:48:54,720 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-25 08:48:54,721 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-25 08:48:54,721 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_dfea410e-5a01-4771-94ba-99ca97538bf8/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-25 08:48:54,748 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-25 08:48:54,749 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-25 08:48:54,750 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-25 08:48:54,750 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-25 08:48:54,750 INFO L138 SettingsManager]: * Use SBE=true [2019-11-25 08:48:54,750 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-25 08:48:54,751 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-25 08:48:54,751 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-25 08:48:54,752 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-25 08:48:54,752 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-25 08:48:54,753 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-25 08:48:54,753 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-25 08:48:54,753 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-25 08:48:54,753 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-25 08:48:54,753 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-25 08:48:54,753 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-25 08:48:54,754 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-25 08:48:54,754 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-25 08:48:54,754 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-25 08:48:54,754 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-25 08:48:54,754 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-25 08:48:54,755 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-25 08:48:54,755 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-25 08:48:54,755 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-25 08:48:54,755 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-25 08:48:54,755 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-25 08:48:54,755 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-25 08:48:54,756 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-25 08:48:54,756 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/run_dir_dfea410e-5a01-4771-94ba-99ca97538bf8/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 -> c5465a084053aead702161d951dd339bfa1665d5 [2019-11-25 08:48:54,949 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-25 08:48:54,959 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-25 08:48:54,961 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-25 08:48:54,963 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-25 08:48:54,963 INFO L275 PluginConnector]: CDTParser initialized [2019-11-25 08:48:54,963 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_dfea410e-5a01-4771-94ba-99ca97538bf8/bin/uautomizer/../../sv-benchmarks/c/loops/sum01_bug02.i [2019-11-25 08:48:55,024 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_dfea410e-5a01-4771-94ba-99ca97538bf8/bin/uautomizer/data/67c1d81ba/2a469f727c4a443d806f277272da86ff/FLAGd718a09a3 [2019-11-25 08:48:55,394 INFO L306 CDTParser]: Found 1 translation units. [2019-11-25 08:48:55,395 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_dfea410e-5a01-4771-94ba-99ca97538bf8/sv-benchmarks/c/loops/sum01_bug02.i [2019-11-25 08:48:55,400 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_dfea410e-5a01-4771-94ba-99ca97538bf8/bin/uautomizer/data/67c1d81ba/2a469f727c4a443d806f277272da86ff/FLAGd718a09a3 [2019-11-25 08:48:55,414 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_dfea410e-5a01-4771-94ba-99ca97538bf8/bin/uautomizer/data/67c1d81ba/2a469f727c4a443d806f277272da86ff [2019-11-25 08:48:55,417 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-25 08:48:55,418 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-25 08:48:55,423 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-25 08:48:55,423 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-25 08:48:55,426 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-25 08:48:55,427 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:48:55" (1/1) ... [2019-11-25 08:48:55,430 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55bdd47f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:48:55, skipping insertion in model container [2019-11-25 08:48:55,430 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:48:55" (1/1) ... [2019-11-25 08:48:55,437 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-25 08:48:55,457 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-25 08:48:55,613 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-25 08:48:55,618 INFO L201 MainTranslator]: Completed pre-run [2019-11-25 08:48:55,689 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-25 08:48:55,702 INFO L205 MainTranslator]: Completed translation [2019-11-25 08:48:55,703 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:48:55 WrapperNode [2019-11-25 08:48:55,703 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-25 08:48:55,704 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-25 08:48:55,704 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-25 08:48:55,704 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-25 08:48:55,711 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:48:55" (1/1) ... [2019-11-25 08:48:55,715 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:48:55" (1/1) ... [2019-11-25 08:48:55,731 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-25 08:48:55,731 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-25 08:48:55,731 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-25 08:48:55,731 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-25 08:48:55,739 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:48:55" (1/1) ... [2019-11-25 08:48:55,740 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:48:55" (1/1) ... [2019-11-25 08:48:55,740 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:48:55" (1/1) ... [2019-11-25 08:48:55,741 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:48:55" (1/1) ... [2019-11-25 08:48:55,742 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:48:55" (1/1) ... [2019-11-25 08:48:55,746 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:48:55" (1/1) ... [2019-11-25 08:48:55,747 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:48:55" (1/1) ... [2019-11-25 08:48:55,748 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-25 08:48:55,749 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-25 08:48:55,749 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-25 08:48:55,749 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-25 08:48:55,750 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:48:55" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dfea410e-5a01-4771-94ba-99ca97538bf8/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 [2019-11-25 08:48:55,809 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-25 08:48:55,809 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-25 08:48:55,967 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-25 08:48:55,967 INFO L284 CfgBuilder]: Removed 7 assume(true) statements. [2019-11-25 08:48:55,968 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:48:55 BoogieIcfgContainer [2019-11-25 08:48:55,968 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-25 08:48:55,969 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-25 08:48:55,969 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-25 08:48:55,972 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-25 08:48:55,972 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:48:55" (1/3) ... [2019-11-25 08:48:55,973 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1efdad23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:48:55, skipping insertion in model container [2019-11-25 08:48:55,973 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:48:55" (2/3) ... [2019-11-25 08:48:55,973 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1efdad23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:48:55, skipping insertion in model container [2019-11-25 08:48:55,973 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:48:55" (3/3) ... [2019-11-25 08:48:55,975 INFO L109 eAbstractionObserver]: Analyzing ICFG sum01_bug02.i [2019-11-25 08:48:55,983 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-25 08:48:55,989 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-25 08:48:55,998 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-25 08:48:56,023 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-25 08:48:56,023 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-25 08:48:56,024 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-25 08:48:56,024 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-25 08:48:56,024 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-25 08:48:56,024 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-25 08:48:56,024 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-25 08:48:56,024 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-25 08:48:56,040 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2019-11-25 08:48:56,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-11-25 08:48:56,044 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:48:56,045 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-11-25 08:48:56,046 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:48:56,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:48:56,051 INFO L82 PathProgramCache]: Analyzing trace with hash 30170436, now seen corresponding path program 1 times [2019-11-25 08:48:56,060 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:48:56,060 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727788316] [2019-11-25 08:48:56,061 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:48:56,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:56,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:48:56,180 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727788316] [2019-11-25 08:48:56,181 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:48:56,181 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-25 08:48:56,183 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467270649] [2019-11-25 08:48:56,188 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-25 08:48:56,189 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:48:56,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-25 08:48:56,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-25 08:48:56,205 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 2 states. [2019-11-25 08:48:56,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:48:56,220 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2019-11-25 08:48:56,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-25 08:48:56,221 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2019-11-25 08:48:56,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:48:56,230 INFO L225 Difference]: With dead ends: 19 [2019-11-25 08:48:56,230 INFO L226 Difference]: Without dead ends: 9 [2019-11-25 08:48:56,232 INFO L630 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 [2019-11-25 08:48:56,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2019-11-25 08:48:56,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2019-11-25 08:48:56,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-11-25 08:48:56,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2019-11-25 08:48:56,259 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 5 [2019-11-25 08:48:56,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:48:56,260 INFO L462 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2019-11-25 08:48:56,260 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-25 08:48:56,260 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2019-11-25 08:48:56,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-11-25 08:48:56,260 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:48:56,261 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-11-25 08:48:56,261 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:48:56,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:48:56,261 INFO L82 PathProgramCache]: Analyzing trace with hash 29783153, now seen corresponding path program 1 times [2019-11-25 08:48:56,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:48:56,262 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428371439] [2019-11-25 08:48:56,262 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:48:56,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:56,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:48:56,346 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428371439] [2019-11-25 08:48:56,346 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:48:56,346 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-25 08:48:56,347 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626837235] [2019-11-25 08:48:56,348 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-25 08:48:56,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:48:56,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-25 08:48:56,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-25 08:48:56,349 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 4 states. [2019-11-25 08:48:56,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:48:56,396 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2019-11-25 08:48:56,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-25 08:48:56,397 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2019-11-25 08:48:56,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:48:56,397 INFO L225 Difference]: With dead ends: 17 [2019-11-25 08:48:56,397 INFO L226 Difference]: Without dead ends: 13 [2019-11-25 08:48:56,398 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-25 08:48:56,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-11-25 08:48:56,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-11-25 08:48:56,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-11-25 08:48:56,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2019-11-25 08:48:56,401 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 5 [2019-11-25 08:48:56,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:48:56,408 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2019-11-25 08:48:56,409 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-25 08:48:56,409 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2019-11-25 08:48:56,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-25 08:48:56,412 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:48:56,412 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:48:56,413 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:48:56,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:48:56,413 INFO L82 PathProgramCache]: Analyzing trace with hash -963514282, now seen corresponding path program 1 times [2019-11-25 08:48:56,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:48:56,414 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827040806] [2019-11-25 08:48:56,414 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:48:56,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:56,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:48:56,639 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827040806] [2019-11-25 08:48:56,639 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598639661] [2019-11-25 08:48:56,640 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dfea410e-5a01-4771-94ba-99ca97538bf8/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 [2019-11-25 08:48:56,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:56,679 WARN L253 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-25 08:48:56,684 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:48:56,814 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:48:56,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:48:56,835 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:48:56,835 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2019-11-25 08:48:56,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473352201] [2019-11-25 08:48:56,836 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-25 08:48:56,836 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:48:56,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-25 08:48:56,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2019-11-25 08:48:56,837 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand 14 states. [2019-11-25 08:48:57,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:48:57,124 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2019-11-25 08:48:57,124 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-25 08:48:57,124 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 9 [2019-11-25 08:48:57,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:48:57,126 INFO L225 Difference]: With dead ends: 35 [2019-11-25 08:48:57,126 INFO L226 Difference]: Without dead ends: 29 [2019-11-25 08:48:57,128 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2019-11-25 08:48:57,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-25 08:48:57,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 22. [2019-11-25 08:48:57,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-25 08:48:57,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2019-11-25 08:48:57,133 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 9 [2019-11-25 08:48:57,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:48:57,134 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2019-11-25 08:48:57,134 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-25 08:48:57,134 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2019-11-25 08:48:57,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-25 08:48:57,135 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:48:57,135 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:48:57,351 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:48:57,351 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:48:57,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:48:57,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1771006013, now seen corresponding path program 1 times [2019-11-25 08:48:57,352 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:48:57,352 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470323265] [2019-11-25 08:48:57,353 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:48:57,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:57,420 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:48:57,420 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470323265] [2019-11-25 08:48:57,421 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224384518] [2019-11-25 08:48:57,421 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dfea410e-5a01-4771-94ba-99ca97538bf8/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:48:57,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:57,457 INFO L255 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-25 08:48:57,459 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:48:57,501 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:48:57,502 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:48:57,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2019-11-25 08:48:57,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403922468] [2019-11-25 08:48:57,503 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-25 08:48:57,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:48:57,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-25 08:48:57,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2019-11-25 08:48:57,503 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 8 states. [2019-11-25 08:48:57,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:48:57,548 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2019-11-25 08:48:57,548 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-25 08:48:57,548 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2019-11-25 08:48:57,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:48:57,549 INFO L225 Difference]: With dead ends: 30 [2019-11-25 08:48:57,549 INFO L226 Difference]: Without dead ends: 18 [2019-11-25 08:48:57,550 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2019-11-25 08:48:57,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-25 08:48:57,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-11-25 08:48:57,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-25 08:48:57,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2019-11-25 08:48:57,553 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2019-11-25 08:48:57,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:48:57,554 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2019-11-25 08:48:57,554 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-25 08:48:57,554 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2019-11-25 08:48:57,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-25 08:48:57,555 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:48:57,555 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1] [2019-11-25 08:48:57,761 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:48:57,761 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:48:57,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:48:57,762 INFO L82 PathProgramCache]: Analyzing trace with hash 1276819616, now seen corresponding path program 2 times [2019-11-25 08:48:57,762 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:48:57,762 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040595410] [2019-11-25 08:48:57,762 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:48:57,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:57,941 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-25 08:48:57,942 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040595410] [2019-11-25 08:48:57,942 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691140565] [2019-11-25 08:48:57,942 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dfea410e-5a01-4771-94ba-99ca97538bf8/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:48:57,981 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-25 08:48:57,981 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:48:57,982 WARN L253 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 23 conjunts are in the unsatisfiable core [2019-11-25 08:48:57,983 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:48:58,221 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:48:58,243 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:48:58,243 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:48:58,243 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 18 [2019-11-25 08:48:58,244 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788078028] [2019-11-25 08:48:58,244 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-25 08:48:58,245 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:48:58,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-25 08:48:58,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2019-11-25 08:48:58,245 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 19 states. [2019-11-25 08:48:58,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:48:58,962 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2019-11-25 08:48:58,964 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-25 08:48:58,964 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 17 [2019-11-25 08:48:58,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:48:58,965 INFO L225 Difference]: With dead ends: 39 [2019-11-25 08:48:58,965 INFO L226 Difference]: Without dead ends: 33 [2019-11-25 08:48:58,966 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=177, Invalid=945, Unknown=0, NotChecked=0, Total=1122 [2019-11-25 08:48:58,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-11-25 08:48:58,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 19. [2019-11-25 08:48:58,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-25 08:48:58,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2019-11-25 08:48:58,971 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 17 [2019-11-25 08:48:58,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:48:58,971 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2019-11-25 08:48:58,971 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-25 08:48:58,971 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2019-11-25 08:48:58,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-25 08:48:58,972 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:48:58,972 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2019-11-25 08:48:59,173 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:48:59,177 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:48:59,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:48:59,178 INFO L82 PathProgramCache]: Analyzing trace with hash -1243140318, now seen corresponding path program 2 times [2019-11-25 08:48:59,178 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:48:59,178 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763796963] [2019-11-25 08:48:59,179 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:48:59,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:59,265 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:48:59,266 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763796963] [2019-11-25 08:48:59,266 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906145266] [2019-11-25 08:48:59,266 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dfea410e-5a01-4771-94ba-99ca97538bf8/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:48:59,303 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-25 08:48:59,304 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:48:59,305 INFO L255 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-25 08:48:59,306 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:48:59,375 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:48:59,376 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:48:59,376 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2019-11-25 08:48:59,376 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814976822] [2019-11-25 08:48:59,377 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-25 08:48:59,377 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:48:59,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-25 08:48:59,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2019-11-25 08:48:59,377 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 12 states. [2019-11-25 08:48:59,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:48:59,436 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2019-11-25 08:48:59,437 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-25 08:48:59,437 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2019-11-25 08:48:59,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:48:59,438 INFO L225 Difference]: With dead ends: 32 [2019-11-25 08:48:59,438 INFO L226 Difference]: Without dead ends: 24 [2019-11-25 08:48:59,438 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2019-11-25 08:48:59,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-11-25 08:48:59,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2019-11-25 08:48:59,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-25 08:48:59,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2019-11-25 08:48:59,442 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 17 [2019-11-25 08:48:59,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:48:59,442 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2019-11-25 08:48:59,442 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-25 08:48:59,442 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2019-11-25 08:48:59,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-25 08:48:59,443 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:48:59,443 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1] [2019-11-25 08:48:59,651 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:48:59,653 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:48:59,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:48:59,653 INFO L82 PathProgramCache]: Analyzing trace with hash -242812025, now seen corresponding path program 3 times [2019-11-25 08:48:59,653 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:48:59,654 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055995113] [2019-11-25 08:48:59,654 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:48:59,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:59,745 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:48:59,746 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055995113] [2019-11-25 08:48:59,746 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995464212] [2019-11-25 08:48:59,746 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dfea410e-5a01-4771-94ba-99ca97538bf8/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:48:59,783 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-11-25 08:48:59,783 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:48:59,784 INFO L255 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-25 08:48:59,785 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:48:59,913 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:48:59,913 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:48:59,913 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2019-11-25 08:48:59,914 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956064897] [2019-11-25 08:48:59,914 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-25 08:48:59,914 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:48:59,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-25 08:48:59,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2019-11-25 08:48:59,915 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 16 states. [2019-11-25 08:48:59,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:48:59,991 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2019-11-25 08:48:59,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-25 08:48:59,992 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 21 [2019-11-25 08:48:59,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:48:59,993 INFO L225 Difference]: With dead ends: 36 [2019-11-25 08:48:59,993 INFO L226 Difference]: Without dead ends: 28 [2019-11-25 08:48:59,993 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2019-11-25 08:48:59,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-25 08:48:59,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2019-11-25 08:48:59,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-25 08:48:59,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2019-11-25 08:48:59,998 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 21 [2019-11-25 08:48:59,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:48:59,998 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2019-11-25 08:48:59,998 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-25 08:48:59,998 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2019-11-25 08:48:59,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-25 08:48:59,999 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:48:59,999 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1] [2019-11-25 08:49:00,204 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:49:00,204 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:49:00,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:49:00,204 INFO L82 PathProgramCache]: Analyzing trace with hash -2047865492, now seen corresponding path program 4 times [2019-11-25 08:49:00,205 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:49:00,205 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117460410] [2019-11-25 08:49:00,205 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:49:00,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:00,315 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:49:00,315 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117460410] [2019-11-25 08:49:00,315 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418825258] [2019-11-25 08:49:00,315 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dfea410e-5a01-4771-94ba-99ca97538bf8/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:49:00,342 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-25 08:49:00,342 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:49:00,343 INFO L255 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-25 08:49:00,345 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:49:00,451 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:49:00,451 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:49:00,451 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2019-11-25 08:49:00,451 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222944747] [2019-11-25 08:49:00,452 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-25 08:49:00,452 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:49:00,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-25 08:49:00,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2019-11-25 08:49:00,453 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 20 states. [2019-11-25 08:49:00,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:49:00,543 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2019-11-25 08:49:00,543 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-25 08:49:00,543 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 25 [2019-11-25 08:49:00,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:49:00,544 INFO L225 Difference]: With dead ends: 41 [2019-11-25 08:49:00,544 INFO L226 Difference]: Without dead ends: 33 [2019-11-25 08:49:00,545 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2019-11-25 08:49:00,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-11-25 08:49:00,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2019-11-25 08:49:00,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-25 08:49:00,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2019-11-25 08:49:00,549 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 25 [2019-11-25 08:49:00,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:49:00,550 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2019-11-25 08:49:00,550 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-25 08:49:00,550 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2019-11-25 08:49:00,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-25 08:49:00,551 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:49:00,551 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1] [2019-11-25 08:49:00,757 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:49:00,757 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:49:00,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:49:00,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1174166319, now seen corresponding path program 5 times [2019-11-25 08:49:00,758 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:49:00,758 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188660699] [2019-11-25 08:49:00,758 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:49:00,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:49:00,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:49:00,813 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-25 08:49:00,813 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-25 08:49:00,833 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 08:49:00 BoogieIcfgContainer [2019-11-25 08:49:00,833 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-25 08:49:00,833 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-25 08:49:00,833 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-25 08:49:00,834 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-25 08:49:00,834 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:48:55" (3/4) ... [2019-11-25 08:49:00,836 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-25 08:49:00,881 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_dfea410e-5a01-4771-94ba-99ca97538bf8/bin/uautomizer/witness.graphml [2019-11-25 08:49:00,881 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-25 08:49:00,883 INFO L168 Benchmark]: Toolchain (without parser) took 5464.51 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 144.7 MB). Free memory was 951.4 MB in the beginning and 997.6 MB in the end (delta: -46.2 MB). Peak memory consumption was 98.5 MB. Max. memory is 11.5 GB. [2019-11-25 08:49:00,884 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-25 08:49:00,884 INFO L168 Benchmark]: CACSL2BoogieTranslator took 280.61 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 144.7 MB). Free memory was 951.4 MB in the beginning and 1.1 GB in the end (delta: -190.8 MB). Peak memory consumption was 24.4 MB. Max. memory is 11.5 GB. [2019-11-25 08:49:00,884 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.01 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. [2019-11-25 08:49:00,885 INFO L168 Benchmark]: Boogie Preprocessor took 17.36 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. [2019-11-25 08:49:00,885 INFO L168 Benchmark]: RCFGBuilder took 219.71 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: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 11.5 GB. [2019-11-25 08:49:00,886 INFO L168 Benchmark]: TraceAbstraction took 4863.99 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 118.1 MB). Peak memory consumption was 118.1 MB. Max. memory is 11.5 GB. [2019-11-25 08:49:00,886 INFO L168 Benchmark]: Witness Printer took 48.19 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 997.6 MB in the end (delta: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. [2019-11-25 08:49:00,898 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 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 280.61 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 144.7 MB). Free memory was 951.4 MB in the beginning and 1.1 GB in the end (delta: -190.8 MB). Peak memory consumption was 24.4 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 27.01 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 17.36 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 219.71 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: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 4863.99 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 118.1 MB). Peak memory consumption was 118.1 MB. Max. memory is 11.5 GB. * Witness Printer took 48.19 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 997.6 MB in the end (delta: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L12] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L13] i=1 [L13] COND TRUE i<=n [L14] COND TRUE i