./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/id_i10_o10_true-unreach-call_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aa418289 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_6f159f05-076f-4682-8a0b-7c89a8008f2f/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_6f159f05-076f-4682-8a0b-7c89a8008f2f/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_6f159f05-076f-4682-8a0b-7c89a8008f2f/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_6f159f05-076f-4682-8a0b-7c89a8008f2f/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/id_i10_o10_true-unreach-call_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_6f159f05-076f-4682-8a0b-7c89a8008f2f/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_6f159f05-076f-4682-8a0b-7c89a8008f2f/bin-2019/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d354f5dc1a4e4616bf2c7c7fc4888805a134a8dd .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-aa41828 [2018-11-23 05:53:29,680 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-23 05:53:29,682 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-23 05:53:29,689 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-23 05:53:29,690 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-23 05:53:29,690 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-23 05:53:29,691 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-23 05:53:29,692 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-23 05:53:29,693 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-23 05:53:29,694 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-23 05:53:29,695 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-23 05:53:29,695 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-23 05:53:29,696 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-23 05:53:29,696 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-23 05:53:29,697 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-23 05:53:29,698 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-23 05:53:29,698 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-23 05:53:29,699 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-23 05:53:29,701 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-23 05:53:29,702 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-23 05:53:29,702 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-23 05:53:29,703 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-23 05:53:29,705 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-23 05:53:29,705 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-23 05:53:29,705 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-23 05:53:29,706 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-23 05:53:29,706 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-23 05:53:29,707 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-23 05:53:29,708 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-23 05:53:29,708 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-23 05:53:29,708 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-23 05:53:29,709 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-23 05:53:29,709 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-23 05:53:29,709 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-23 05:53:29,710 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-23 05:53:29,710 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-23 05:53:29,711 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_6f159f05-076f-4682-8a0b-7c89a8008f2f/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-11-23 05:53:29,720 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-23 05:53:29,721 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-23 05:53:29,721 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-23 05:53:29,721 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-11-23 05:53:29,722 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-23 05:53:29,722 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-23 05:53:29,722 INFO L133 SettingsManager]: * Use SBE=true [2018-11-23 05:53:29,722 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-23 05:53:29,722 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-23 05:53:29,723 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-23 05:53:29,723 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-23 05:53:29,723 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-23 05:53:29,723 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-23 05:53:29,723 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-23 05:53:29,723 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-23 05:53:29,723 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-23 05:53:29,723 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-23 05:53:29,724 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-23 05:53:29,724 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-23 05:53:29,724 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-23 05:53:29,724 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-23 05:53:29,724 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-23 05:53:29,724 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-23 05:53:29,724 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-23 05:53:29,725 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-23 05:53:29,725 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-23 05:53:29,725 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-23 05:53:29,725 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-23 05:53:29,725 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-23 05:53:29,725 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-23 05:53:29,725 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/working_dir_6f159f05-076f-4682-8a0b-7c89a8008f2f/bin-2019/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d354f5dc1a4e4616bf2c7c7fc4888805a134a8dd [2018-11-23 05:53:29,752 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-23 05:53:29,760 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-23 05:53:29,762 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-23 05:53:29,763 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-23 05:53:29,763 INFO L276 PluginConnector]: CDTParser initialized [2018-11-23 05:53:29,763 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_6f159f05-076f-4682-8a0b-7c89a8008f2f/bin-2019/uautomizer/../../sv-benchmarks/c/recursive-simple/id_i10_o10_true-unreach-call_true-termination.c [2018-11-23 05:53:29,801 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_6f159f05-076f-4682-8a0b-7c89a8008f2f/bin-2019/uautomizer/data/31bfb7667/8441b4ec7b4e4dfca66f732c790c88d4/FLAG4ae54b3ae [2018-11-23 05:53:30,130 INFO L307 CDTParser]: Found 1 translation units. [2018-11-23 05:53:30,130 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_6f159f05-076f-4682-8a0b-7c89a8008f2f/sv-benchmarks/c/recursive-simple/id_i10_o10_true-unreach-call_true-termination.c [2018-11-23 05:53:30,134 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_6f159f05-076f-4682-8a0b-7c89a8008f2f/bin-2019/uautomizer/data/31bfb7667/8441b4ec7b4e4dfca66f732c790c88d4/FLAG4ae54b3ae [2018-11-23 05:53:30,565 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_6f159f05-076f-4682-8a0b-7c89a8008f2f/bin-2019/uautomizer/data/31bfb7667/8441b4ec7b4e4dfca66f732c790c88d4 [2018-11-23 05:53:30,568 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-23 05:53:30,568 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-23 05:53:30,569 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-23 05:53:30,569 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-23 05:53:30,571 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-23 05:53:30,572 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:53:30" (1/1) ... [2018-11-23 05:53:30,573 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46704e2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:53:30, skipping insertion in model container [2018-11-23 05:53:30,573 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:53:30" (1/1) ... [2018-11-23 05:53:30,580 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-23 05:53:30,590 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-23 05:53:30,694 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-23 05:53:30,697 INFO L191 MainTranslator]: Completed pre-run [2018-11-23 05:53:30,705 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-23 05:53:30,713 INFO L195 MainTranslator]: Completed translation [2018-11-23 05:53:30,713 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:53:30 WrapperNode [2018-11-23 05:53:30,713 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-23 05:53:30,714 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-23 05:53:30,714 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-23 05:53:30,714 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-23 05:53:30,721 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:53:30" (1/1) ... [2018-11-23 05:53:30,725 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:53:30" (1/1) ... [2018-11-23 05:53:30,731 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-23 05:53:30,731 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-23 05:53:30,731 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-23 05:53:30,731 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-23 05:53:30,739 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:53:30" (1/1) ... [2018-11-23 05:53:30,739 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:53:30" (1/1) ... [2018-11-23 05:53:30,739 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:53:30" (1/1) ... [2018-11-23 05:53:30,740 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:53:30" (1/1) ... [2018-11-23 05:53:30,742 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:53:30" (1/1) ... [2018-11-23 05:53:30,744 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:53:30" (1/1) ... [2018-11-23 05:53:30,744 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:53:30" (1/1) ... [2018-11-23 05:53:30,745 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-23 05:53:30,745 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-23 05:53:30,746 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-23 05:53:30,746 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-23 05:53:30,746 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:53:30" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6f159f05-076f-4682-8a0b-7c89a8008f2f/bin-2019/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-23 05:53:30,822 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-23 05:53:30,822 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-23 05:53:30,823 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-23 05:53:30,823 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-23 05:53:30,823 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-23 05:53:30,823 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-23 05:53:30,823 INFO L130 BoogieDeclarations]: Found specification of procedure id [2018-11-23 05:53:30,823 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2018-11-23 05:53:30,938 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-23 05:53:30,938 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-11-23 05:53:30,939 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:53:30 BoogieIcfgContainer [2018-11-23 05:53:30,939 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-23 05:53:30,939 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-23 05:53:30,940 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-23 05:53:30,942 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-23 05:53:30,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 05:53:30" (1/3) ... [2018-11-23 05:53:30,943 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cf79f91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:53:30, skipping insertion in model container [2018-11-23 05:53:30,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:53:30" (2/3) ... [2018-11-23 05:53:30,943 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cf79f91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:53:30, skipping insertion in model container [2018-11-23 05:53:30,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:53:30" (3/3) ... [2018-11-23 05:53:30,945 INFO L112 eAbstractionObserver]: Analyzing ICFG id_i10_o10_true-unreach-call_true-termination.c [2018-11-23 05:53:30,953 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-23 05:53:30,959 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-23 05:53:30,974 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-23 05:53:31,000 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-23 05:53:31,001 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-23 05:53:31,001 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-23 05:53:31,001 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-23 05:53:31,001 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-23 05:53:31,001 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-23 05:53:31,001 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-23 05:53:31,001 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-23 05:53:31,001 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-23 05:53:31,016 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2018-11-23 05:53:31,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-23 05:53:31,021 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 05:53:31,022 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 05:53:31,024 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 05:53:31,028 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 05:53:31,029 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2018-11-23 05:53:31,030 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 05:53:31,031 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 05:53:31,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 05:53:31,068 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 05:53:31,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 05:53:31,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 05:53:31,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 05:53:31,162 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 05:53:31,163 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-23 05:53:31,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-23 05:53:31,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-23 05:53:31,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-23 05:53:31,175 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2018-11-23 05:53:31,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 05:53:31,233 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2018-11-23 05:53:31,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-23 05:53:31,235 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-11-23 05:53:31,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 05:53:31,243 INFO L225 Difference]: With dead ends: 30 [2018-11-23 05:53:31,243 INFO L226 Difference]: Without dead ends: 18 [2018-11-23 05:53:31,246 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-23 05:53:31,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-11-23 05:53:31,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-11-23 05:53:31,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-11-23 05:53:31,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2018-11-23 05:53:31,274 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2018-11-23 05:53:31,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 05:53:31,274 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2018-11-23 05:53:31,274 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-23 05:53:31,274 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2018-11-23 05:53:31,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-11-23 05:53:31,276 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 05:53:31,276 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 05:53:31,276 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 05:53:31,276 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 05:53:31,277 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2018-11-23 05:53:31,277 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 05:53:31,277 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 05:53:31,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 05:53:31,278 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 05:53:31,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 05:53:31,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 05:53:31,328 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-23 05:53:31,328 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 05:53:31,328 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6f159f05-076f-4682-8a0b-7c89a8008f2f/bin-2019/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 05:53:31,341 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 05:53:31,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 05:53:31,355 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 05:53:31,378 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-23 05:53:31,393 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 05:53:31,393 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-11-23 05:53:31,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-23 05:53:31,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-23 05:53:31,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-11-23 05:53:31,394 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2018-11-23 05:53:31,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 05:53:31,452 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-11-23 05:53:31,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-23 05:53:31,453 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2018-11-23 05:53:31,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 05:53:31,453 INFO L225 Difference]: With dead ends: 25 [2018-11-23 05:53:31,453 INFO L226 Difference]: Without dead ends: 21 [2018-11-23 05:53:31,454 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-11-23 05:53:31,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-11-23 05:53:31,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-11-23 05:53:31,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-11-23 05:53:31,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-11-23 05:53:31,458 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2018-11-23 05:53:31,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 05:53:31,458 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-11-23 05:53:31,458 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-23 05:53:31,459 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-11-23 05:53:31,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-11-23 05:53:31,459 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 05:53:31,459 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 05:53:31,460 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 05:53:31,460 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 05:53:31,460 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2018-11-23 05:53:31,460 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 05:53:31,460 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 05:53:31,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 05:53:31,462 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 05:53:31,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 05:53:31,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 05:53:31,531 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-23 05:53:31,531 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 05:53:31,532 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6f159f05-076f-4682-8a0b-7c89a8008f2f/bin-2019/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 05:53:31,544 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-23 05:53:31,562 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-23 05:53:31,562 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 05:53:31,565 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 05:53:31,578 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-23 05:53:31,602 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 05:53:31,602 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-11-23 05:53:31,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-23 05:53:31,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-23 05:53:31,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-11-23 05:53:31,603 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 7 states. [2018-11-23 05:53:31,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 05:53:31,650 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2018-11-23 05:53:31,650 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-23 05:53:31,651 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2018-11-23 05:53:31,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 05:53:31,651 INFO L225 Difference]: With dead ends: 28 [2018-11-23 05:53:31,651 INFO L226 Difference]: Without dead ends: 24 [2018-11-23 05:53:31,651 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-11-23 05:53:31,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-11-23 05:53:31,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-11-23 05:53:31,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-11-23 05:53:31,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2018-11-23 05:53:31,654 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2018-11-23 05:53:31,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 05:53:31,654 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2018-11-23 05:53:31,654 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-23 05:53:31,655 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2018-11-23 05:53:31,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-11-23 05:53:31,655 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 05:53:31,655 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 05:53:31,655 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 05:53:31,656 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 05:53:31,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2018-11-23 05:53:31,656 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 05:53:31,656 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 05:53:31,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 05:53:31,657 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 05:53:31,657 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 05:53:31,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 05:53:31,722 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-23 05:53:31,722 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 05:53:31,723 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6f159f05-076f-4682-8a0b-7c89a8008f2f/bin-2019/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 05:53:31,731 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-23 05:53:31,745 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-11-23 05:53:31,745 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 05:53:31,747 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 05:53:31,762 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-23 05:53:31,785 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 05:53:31,785 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-11-23 05:53:31,785 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-23 05:53:31,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-23 05:53:31,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-23 05:53:31,786 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 8 states. [2018-11-23 05:53:31,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 05:53:31,862 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2018-11-23 05:53:31,862 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-23 05:53:31,862 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2018-11-23 05:53:31,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 05:53:31,863 INFO L225 Difference]: With dead ends: 31 [2018-11-23 05:53:31,863 INFO L226 Difference]: Without dead ends: 27 [2018-11-23 05:53:31,863 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2018-11-23 05:53:31,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-11-23 05:53:31,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-11-23 05:53:31,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-11-23 05:53:31,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-11-23 05:53:31,866 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2018-11-23 05:53:31,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 05:53:31,867 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-11-23 05:53:31,867 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-23 05:53:31,867 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-11-23 05:53:31,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-11-23 05:53:31,867 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 05:53:31,868 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 05:53:31,868 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 05:53:31,868 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 05:53:31,868 INFO L82 PathProgramCache]: Analyzing trace with hash 1080764669, now seen corresponding path program 4 times [2018-11-23 05:53:31,868 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 05:53:31,868 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 05:53:31,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 05:53:31,869 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 05:53:31,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 05:53:31,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 05:53:31,930 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-11-23 05:53:31,930 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 05:53:31,930 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6f159f05-076f-4682-8a0b-7c89a8008f2f/bin-2019/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 05:53:31,938 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-23 05:53:31,946 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-23 05:53:31,946 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 05:53:31,948 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 05:53:31,962 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-11-23 05:53:31,985 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 05:53:31,985 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-11-23 05:53:31,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-23 05:53:31,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-23 05:53:31,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-11-23 05:53:31,986 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 9 states. [2018-11-23 05:53:32,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 05:53:32,058 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2018-11-23 05:53:32,059 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-23 05:53:32,059 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2018-11-23 05:53:32,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 05:53:32,060 INFO L225 Difference]: With dead ends: 34 [2018-11-23 05:53:32,060 INFO L226 Difference]: Without dead ends: 30 [2018-11-23 05:53:32,060 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2018-11-23 05:53:32,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-11-23 05:53:32,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-11-23 05:53:32,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-11-23 05:53:32,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2018-11-23 05:53:32,064 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2018-11-23 05:53:32,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 05:53:32,064 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2018-11-23 05:53:32,064 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-23 05:53:32,065 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2018-11-23 05:53:32,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-11-23 05:53:32,065 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 05:53:32,066 INFO L402 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 05:53:32,066 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 05:53:32,066 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 05:53:32,066 INFO L82 PathProgramCache]: Analyzing trace with hash -1752970513, now seen corresponding path program 5 times [2018-11-23 05:53:32,066 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 05:53:32,066 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 05:53:32,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 05:53:32,067 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 05:53:32,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 05:53:32,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 05:53:32,134 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-11-23 05:53:32,135 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 05:53:32,135 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6f159f05-076f-4682-8a0b-7c89a8008f2f/bin-2019/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 05:53:32,146 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-23 05:53:32,160 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-11-23 05:53:32,161 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 05:53:32,163 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 05:53:32,178 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-11-23 05:53:32,193 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 05:53:32,193 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-11-23 05:53:32,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-23 05:53:32,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-23 05:53:32,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-11-23 05:53:32,194 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 10 states. [2018-11-23 05:53:32,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 05:53:32,268 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2018-11-23 05:53:32,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-23 05:53:32,269 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2018-11-23 05:53:32,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 05:53:32,270 INFO L225 Difference]: With dead ends: 37 [2018-11-23 05:53:32,270 INFO L226 Difference]: Without dead ends: 33 [2018-11-23 05:53:32,270 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2018-11-23 05:53:32,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-11-23 05:53:32,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-11-23 05:53:32,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-11-23 05:53:32,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-11-23 05:53:32,277 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2018-11-23 05:53:32,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 05:53:32,278 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-11-23 05:53:32,278 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-23 05:53:32,278 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-11-23 05:53:32,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-11-23 05:53:32,279 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 05:53:32,279 INFO L402 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 05:53:32,280 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 05:53:32,280 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 05:53:32,280 INFO L82 PathProgramCache]: Analyzing trace with hash -1590630787, now seen corresponding path program 6 times [2018-11-23 05:53:32,280 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 05:53:32,280 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 05:53:32,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 05:53:32,281 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 05:53:32,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 05:53:32,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 05:53:32,373 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-11-23 05:53:32,373 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 05:53:32,373 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6f159f05-076f-4682-8a0b-7c89a8008f2f/bin-2019/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 05:53:32,380 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-23 05:53:32,403 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-11-23 05:53:32,403 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 05:53:32,406 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 05:53:32,422 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-11-23 05:53:32,437 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 05:53:32,437 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-11-23 05:53:32,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-23 05:53:32,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-23 05:53:32,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2018-11-23 05:53:32,438 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 11 states. [2018-11-23 05:53:32,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 05:53:32,516 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2018-11-23 05:53:32,516 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-23 05:53:32,516 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2018-11-23 05:53:32,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 05:53:32,517 INFO L225 Difference]: With dead ends: 40 [2018-11-23 05:53:32,517 INFO L226 Difference]: Without dead ends: 36 [2018-11-23 05:53:32,518 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2018-11-23 05:53:32,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-11-23 05:53:32,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-11-23 05:53:32,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-11-23 05:53:32,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2018-11-23 05:53:32,521 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2018-11-23 05:53:32,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 05:53:32,521 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2018-11-23 05:53:32,521 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-23 05:53:32,521 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2018-11-23 05:53:32,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-11-23 05:53:32,522 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 05:53:32,522 INFO L402 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 05:53:32,522 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 05:53:32,523 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 05:53:32,523 INFO L82 PathProgramCache]: Analyzing trace with hash 1532150511, now seen corresponding path program 7 times [2018-11-23 05:53:32,523 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 05:53:32,523 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 05:53:32,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 05:53:32,524 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 05:53:32,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 05:53:32,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 05:53:32,611 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-11-23 05:53:32,611 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 05:53:32,611 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6f159f05-076f-4682-8a0b-7c89a8008f2f/bin-2019/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 05:53:32,617 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 05:53:32,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 05:53:32,629 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 05:53:32,646 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-11-23 05:53:32,662 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 05:53:32,662 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-11-23 05:53:32,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-23 05:53:32,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-23 05:53:32,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2018-11-23 05:53:32,663 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 12 states. [2018-11-23 05:53:32,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 05:53:32,766 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2018-11-23 05:53:32,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-23 05:53:32,766 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2018-11-23 05:53:32,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 05:53:32,767 INFO L225 Difference]: With dead ends: 43 [2018-11-23 05:53:32,767 INFO L226 Difference]: Without dead ends: 39 [2018-11-23 05:53:32,767 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2018-11-23 05:53:32,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-11-23 05:53:32,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-11-23 05:53:32,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-11-23 05:53:32,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2018-11-23 05:53:32,771 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2018-11-23 05:53:32,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 05:53:32,771 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2018-11-23 05:53:32,771 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-23 05:53:32,771 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2018-11-23 05:53:32,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-11-23 05:53:32,772 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 05:53:32,772 INFO L402 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 05:53:32,772 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 05:53:32,772 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 05:53:32,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1140618237, now seen corresponding path program 8 times [2018-11-23 05:53:32,773 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 05:53:32,773 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 05:53:32,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 05:53:32,773 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 05:53:32,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 05:53:32,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 05:53:32,856 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-11-23 05:53:32,856 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 05:53:32,856 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6f159f05-076f-4682-8a0b-7c89a8008f2f/bin-2019/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 05:53:32,864 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-23 05:53:32,877 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-23 05:53:32,878 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 05:53:32,880 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 05:53:32,898 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-11-23 05:53:32,914 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 05:53:32,914 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-11-23 05:53:32,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-23 05:53:32,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-23 05:53:32,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2018-11-23 05:53:32,915 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 13 states. [2018-11-23 05:53:32,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 05:53:32,992 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2018-11-23 05:53:32,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-23 05:53:32,993 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2018-11-23 05:53:32,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 05:53:32,994 INFO L225 Difference]: With dead ends: 46 [2018-11-23 05:53:32,994 INFO L226 Difference]: Without dead ends: 42 [2018-11-23 05:53:32,994 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2018-11-23 05:53:32,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-11-23 05:53:32,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-11-23 05:53:32,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-11-23 05:53:32,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2018-11-23 05:53:32,998 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2018-11-23 05:53:32,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 05:53:32,998 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2018-11-23 05:53:32,998 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-23 05:53:32,998 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2018-11-23 05:53:32,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-11-23 05:53:32,999 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 05:53:32,999 INFO L402 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 05:53:32,999 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 05:53:32,999 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 05:53:33,000 INFO L82 PathProgramCache]: Analyzing trace with hash -1749177617, now seen corresponding path program 9 times [2018-11-23 05:53:33,000 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 05:53:33,000 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 05:53:33,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 05:53:33,000 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 05:53:33,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 05:53:33,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 05:53:33,075 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-11-23 05:53:33,075 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 05:53:33,076 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6f159f05-076f-4682-8a0b-7c89a8008f2f/bin-2019/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 05:53:33,086 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-23 05:53:33,116 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-11-23 05:53:33,117 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 05:53:33,120 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 05:53:33,143 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-11-23 05:53:33,157 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 05:53:33,158 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-11-23 05:53:33,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-23 05:53:33,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-23 05:53:33,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2018-11-23 05:53:33,158 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 14 states. [2018-11-23 05:53:33,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 05:53:33,263 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2018-11-23 05:53:33,263 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-23 05:53:33,264 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 67 [2018-11-23 05:53:33,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 05:53:33,264 INFO L225 Difference]: With dead ends: 49 [2018-11-23 05:53:33,264 INFO L226 Difference]: Without dead ends: 45 [2018-11-23 05:53:33,265 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2018-11-23 05:53:33,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-11-23 05:53:33,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-11-23 05:53:33,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-11-23 05:53:33,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2018-11-23 05:53:33,269 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2018-11-23 05:53:33,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 05:53:33,270 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2018-11-23 05:53:33,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-23 05:53:33,270 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2018-11-23 05:53:33,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-11-23 05:53:33,271 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 05:53:33,271 INFO L402 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 05:53:33,271 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 05:53:33,271 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 05:53:33,271 INFO L82 PathProgramCache]: Analyzing trace with hash -1580609155, now seen corresponding path program 10 times [2018-11-23 05:53:33,272 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 05:53:33,272 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 05:53:33,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 05:53:33,272 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 05:53:33,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 05:53:33,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 05:53:33,601 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2018-11-23 05:53:33,601 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 05:53:33,601 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6f159f05-076f-4682-8a0b-7c89a8008f2f/bin-2019/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 05:53:33,608 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-23 05:53:33,629 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-23 05:53:33,629 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 05:53:33,631 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 05:53:33,681 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2018-11-23 05:53:33,698 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 05:53:33,698 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-11-23 05:53:33,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-11-23 05:53:33,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-11-23 05:53:33,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-11-23 05:53:33,699 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 25 states. [2018-11-23 05:53:33,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 05:53:33,846 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2018-11-23 05:53:33,846 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-11-23 05:53:33,846 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 73 [2018-11-23 05:53:33,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 05:53:33,847 INFO L225 Difference]: With dead ends: 52 [2018-11-23 05:53:33,847 INFO L226 Difference]: Without dead ends: 48 [2018-11-23 05:53:33,847 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 72 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-11-23 05:53:33,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-11-23 05:53:33,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-11-23 05:53:33,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-11-23 05:53:33,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2018-11-23 05:53:33,852 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2018-11-23 05:53:33,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 05:53:33,852 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2018-11-23 05:53:33,852 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-11-23 05:53:33,852 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2018-11-23 05:53:33,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-11-23 05:53:33,853 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 05:53:33,853 INFO L402 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 05:53:33,853 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 05:53:33,853 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 05:53:33,854 INFO L82 PathProgramCache]: Analyzing trace with hash -223837457, now seen corresponding path program 11 times [2018-11-23 05:53:33,854 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 05:53:33,854 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 05:53:33,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 05:53:33,854 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 05:53:33,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 05:53:33,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 05:53:33,979 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 187 proven. 0 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2018-11-23 05:53:33,979 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 05:53:33,980 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2018-11-23 05:53:33,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-23 05:53:33,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-23 05:53:33,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2018-11-23 05:53:33,980 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 16 states. [2018-11-23 05:53:34,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 05:53:34,080 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2018-11-23 05:53:34,081 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-23 05:53:34,081 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 79 [2018-11-23 05:53:34,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 05:53:34,081 INFO L225 Difference]: With dead ends: 48 [2018-11-23 05:53:34,081 INFO L226 Difference]: Without dead ends: 0 [2018-11-23 05:53:34,082 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=275, Invalid=481, Unknown=0, NotChecked=0, Total=756 [2018-11-23 05:53:34,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-23 05:53:34,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-23 05:53:34,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-23 05:53:34,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-23 05:53:34,082 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 79 [2018-11-23 05:53:34,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 05:53:34,083 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-23 05:53:34,083 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-23 05:53:34,083 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-23 05:53:34,083 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-23 05:53:34,087 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-23 05:53:34,104 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-23 05:53:34,104 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-23 05:53:34,104 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-23 05:53:34,104 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-23 05:53:34,104 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-23 05:53:34,104 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-23 05:53:34,105 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 9 15) the Hoare annotation is: true [2018-11-23 05:53:34,105 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 9 15) no Hoare annotation was computed. [2018-11-23 05:53:34,105 INFO L448 ceAbstractionStarter]: For program point L13(line 13) no Hoare annotation was computed. [2018-11-23 05:53:34,105 INFO L448 ceAbstractionStarter]: For program point L12(lines 12 14) no Hoare annotation was computed. [2018-11-23 05:53:34,105 INFO L444 ceAbstractionStarter]: At program point L11(line 11) the Hoare annotation is: (and (<= 10 main_~input~0) (<= main_~input~0 10)) [2018-11-23 05:53:34,105 INFO L448 ceAbstractionStarter]: For program point L11-1(line 11) no Hoare annotation was computed. [2018-11-23 05:53:34,105 INFO L448 ceAbstractionStarter]: For program point L12-2(lines 9 15) no Hoare annotation was computed. [2018-11-23 05:53:34,105 INFO L448 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2018-11-23 05:53:34,105 INFO L448 ceAbstractionStarter]: For program point idFINAL(lines 4 7) no Hoare annotation was computed. [2018-11-23 05:53:34,105 INFO L448 ceAbstractionStarter]: For program point idEXIT(lines 4 7) no Hoare annotation was computed. [2018-11-23 05:53:34,105 INFO L451 ceAbstractionStarter]: At program point idENTRY(lines 4 7) the Hoare annotation is: true [2018-11-23 05:53:34,105 INFO L444 ceAbstractionStarter]: At program point L6(line 6) the Hoare annotation is: (and (<= |id_#in~x| id_~x) (<= id_~x |id_#in~x|)) [2018-11-23 05:53:34,106 INFO L448 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-11-23 05:53:34,106 INFO L448 ceAbstractionStarter]: For program point L6-1(line 6) no Hoare annotation was computed. [2018-11-23 05:53:34,108 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 05:53:34 BoogieIcfgContainer [2018-11-23 05:53:34,108 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-23 05:53:34,108 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-23 05:53:34,108 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-23 05:53:34,108 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-23 05:53:34,109 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:53:30" (3/4) ... [2018-11-23 05:53:34,112 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-23 05:53:34,118 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-23 05:53:34,119 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-23 05:53:34,119 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure id [2018-11-23 05:53:34,122 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-11-23 05:53:34,122 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-11-23 05:53:34,122 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-23 05:53:34,151 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_6f159f05-076f-4682-8a0b-7c89a8008f2f/bin-2019/uautomizer/witness.graphml [2018-11-23 05:53:34,151 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-23 05:53:34,152 INFO L168 Benchmark]: Toolchain (without parser) took 3583.71 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 168.8 MB). Free memory was 959.1 MB in the beginning and 1.1 GB in the end (delta: -109.9 MB). Peak memory consumption was 58.9 MB. Max. memory is 11.5 GB. [2018-11-23 05:53:34,153 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-23 05:53:34,153 INFO L168 Benchmark]: CACSL2BoogieTranslator took 144.51 ms. Allocated memory is still 1.0 GB. Free memory was 959.1 MB in the beginning and 948.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-23 05:53:34,153 INFO L168 Benchmark]: Boogie Procedure Inliner took 16.96 ms. Allocated memory is still 1.0 GB. Free memory is still 948.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-23 05:53:34,153 INFO L168 Benchmark]: Boogie Preprocessor took 14.31 ms. Allocated memory is still 1.0 GB. Free memory was 948.4 MB in the beginning and 945.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-23 05:53:34,154 INFO L168 Benchmark]: RCFGBuilder took 193.48 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 125.3 MB). Free memory was 945.7 MB in the beginning and 1.1 GB in the end (delta: -169.2 MB). Peak memory consumption was 19.3 MB. Max. memory is 11.5 GB. [2018-11-23 05:53:34,154 INFO L168 Benchmark]: TraceAbstraction took 3168.53 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 43.5 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 45.9 MB). Peak memory consumption was 89.4 MB. Max. memory is 11.5 GB. [2018-11-23 05:53:34,155 INFO L168 Benchmark]: Witness Printer took 42.78 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. [2018-11-23 05:53:34,156 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 144.51 ms. Allocated memory is still 1.0 GB. Free memory was 959.1 MB in the beginning and 948.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 16.96 ms. Allocated memory is still 1.0 GB. Free memory is still 948.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 14.31 ms. Allocated memory is still 1.0 GB. Free memory was 948.4 MB in the beginning and 945.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 193.48 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 125.3 MB). Free memory was 945.7 MB in the beginning and 1.1 GB in the end (delta: -169.2 MB). Peak memory consumption was 19.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 3168.53 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 43.5 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 45.9 MB). Peak memory consumption was 89.4 MB. Max. memory is 11.5 GB. * Witness Printer took 42.78 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. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. SAFE Result, 3.1s OverallTime, 12 OverallIterations, 12 TraceHistogramMax, 1.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 200 SDtfs, 167 SDslu, 1340 SDs, 0 SdLazy, 781 SolverSat, 13 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 709 GetRequests, 528 SyntacticMatches, 2 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=48occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 12 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 9 NumberOfFragments, 19 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 1012 NumberOfCodeBlocks, 1007 NumberOfCodeBlocksAsserted, 48 NumberOfCheckSat, 990 ConstructedInterpolants, 0 QuantifiedInterpolants, 142392 SizeOfPredicates, 64 NumberOfNonLiveVariables, 1060 ConjunctsInSsa, 173 ConjunctsInUnsatCore, 22 InterpolantComputations, 2 PerfectInterpolantSequences, 1584/2794 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...