./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted/NestedRecursion_2b.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_01640e4a-3330-4e8b-be8d-f715c048702a/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_01640e4a-3330-4e8b-be8d-f715c048702a/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_01640e4a-3330-4e8b-be8d-f715c048702a/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_01640e4a-3330-4e8b-be8d-f715c048702a/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/termination-crafted/NestedRecursion_2b.c -s /tmp/vcloud-vcloud-master/worker/run_dir_01640e4a-3330-4e8b-be8d-f715c048702a/bin/uautomizer/config/svcomp-Overflow-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_01640e4a-3330-4e8b-be8d-f715c048702a/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 1b7166d94206693c3f254a3c1de8d5825f8510fb ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-12-07 11:56:55,977 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 11:56:55,979 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 11:56:55,989 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 11:56:55,989 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 11:56:55,990 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 11:56:55,991 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 11:56:55,993 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 11:56:55,995 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 11:56:55,996 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 11:56:55,997 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 11:56:55,998 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 11:56:55,998 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 11:56:55,999 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 11:56:56,000 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 11:56:56,001 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 11:56:56,002 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 11:56:56,003 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 11:56:56,004 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 11:56:56,006 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 11:56:56,008 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 11:56:56,009 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 11:56:56,010 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 11:56:56,010 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 11:56:56,012 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 11:56:56,013 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 11:56:56,013 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 11:56:56,013 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 11:56:56,014 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 11:56:56,014 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 11:56:56,015 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 11:56:56,015 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 11:56:56,016 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 11:56:56,016 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 11:56:56,017 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 11:56:56,017 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 11:56:56,018 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 11:56:56,018 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 11:56:56,018 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 11:56:56,019 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 11:56:56,019 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 11:56:56,020 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_01640e4a-3330-4e8b-be8d-f715c048702a/bin/uautomizer/config/svcomp-Overflow-64bit-Automizer_Default.epf [2019-12-07 11:56:56,032 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 11:56:56,032 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 11:56:56,032 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-07 11:56:56,033 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-07 11:56:56,033 INFO L138 SettingsManager]: * Use SBE=true [2019-12-07 11:56:56,033 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 11:56:56,033 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-12-07 11:56:56,033 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 11:56:56,033 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 11:56:56,033 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 11:56:56,034 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 11:56:56,034 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 11:56:56,034 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2019-12-07 11:56:56,034 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 11:56:56,034 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 11:56:56,034 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 11:56:56,035 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 11:56:56,035 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-07 11:56:56,035 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 11:56:56,035 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 11:56:56,035 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 11:56:56,035 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 11:56:56,035 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 11:56:56,036 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 11:56:56,036 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-07 11:56:56,036 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 11:56:56,036 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 11:56:56,036 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 11:56:56,036 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_01640e4a-3330-4e8b-be8d-f715c048702a/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) 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 -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1b7166d94206693c3f254a3c1de8d5825f8510fb [2019-12-07 11:56:56,146 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 11:56:56,154 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 11:56:56,157 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 11:56:56,158 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 11:56:56,159 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 11:56:56,159 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_01640e4a-3330-4e8b-be8d-f715c048702a/bin/uautomizer/../../sv-benchmarks/c/termination-crafted/NestedRecursion_2b.c [2019-12-07 11:56:56,206 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_01640e4a-3330-4e8b-be8d-f715c048702a/bin/uautomizer/data/23b88e1c1/0935a8e8868f4f928176d5e48cdcc09b/FLAG94ca073e0 [2019-12-07 11:56:56,547 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 11:56:56,547 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_01640e4a-3330-4e8b-be8d-f715c048702a/sv-benchmarks/c/termination-crafted/NestedRecursion_2b.c [2019-12-07 11:56:56,551 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_01640e4a-3330-4e8b-be8d-f715c048702a/bin/uautomizer/data/23b88e1c1/0935a8e8868f4f928176d5e48cdcc09b/FLAG94ca073e0 [2019-12-07 11:56:56,560 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_01640e4a-3330-4e8b-be8d-f715c048702a/bin/uautomizer/data/23b88e1c1/0935a8e8868f4f928176d5e48cdcc09b [2019-12-07 11:56:56,562 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 11:56:56,563 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 11:56:56,564 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 11:56:56,564 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 11:56:56,567 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 11:56:56,567 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 11:56:56" (1/1) ... [2019-12-07 11:56:56,569 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@503a86d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:56:56, skipping insertion in model container [2019-12-07 11:56:56,569 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 11:56:56" (1/1) ... [2019-12-07 11:56:56,574 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 11:56:56,584 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 11:56:56,676 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 11:56:56,678 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 11:56:56,730 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 11:56:56,739 INFO L208 MainTranslator]: Completed translation [2019-12-07 11:56:56,740 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:56:56 WrapperNode [2019-12-07 11:56:56,740 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 11:56:56,740 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 11:56:56,740 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 11:56:56,741 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 11:56:56,746 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:56:56" (1/1) ... [2019-12-07 11:56:56,750 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:56:56" (1/1) ... [2019-12-07 11:56:56,761 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 11:56:56,762 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 11:56:56,762 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 11:56:56,762 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 11:56:56,768 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:56:56" (1/1) ... [2019-12-07 11:56:56,768 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:56:56" (1/1) ... [2019-12-07 11:56:56,768 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:56:56" (1/1) ... [2019-12-07 11:56:56,769 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:56:56" (1/1) ... [2019-12-07 11:56:56,770 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:56:56" (1/1) ... [2019-12-07 11:56:56,771 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:56:56" (1/1) ... [2019-12-07 11:56:56,772 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:56:56" (1/1) ... [2019-12-07 11:56:56,772 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 11:56:56,773 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 11:56:56,773 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 11:56:56,773 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 11:56:56,774 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:56:56" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_01640e4a-3330-4e8b-be8d-f715c048702a/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 11:56:56,813 INFO L130 BoogieDeclarations]: Found specification of procedure g [2019-12-07 11:56:56,813 INFO L138 BoogieDeclarations]: Found implementation of procedure g [2019-12-07 11:56:56,813 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 11:56:56,813 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 11:56:56,917 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 11:56:56,917 INFO L287 CfgBuilder]: Removed 4 assume(true) statements. [2019-12-07 11:56:56,918 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 11:56:56 BoogieIcfgContainer [2019-12-07 11:56:56,918 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 11:56:56,919 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 11:56:56,919 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 11:56:56,921 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 11:56:56,921 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 11:56:56" (1/3) ... [2019-12-07 11:56:56,921 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26e81e9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 11:56:56, skipping insertion in model container [2019-12-07 11:56:56,921 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:56:56" (2/3) ... [2019-12-07 11:56:56,922 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26e81e9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 11:56:56, skipping insertion in model container [2019-12-07 11:56:56,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 11:56:56" (3/3) ... [2019-12-07 11:56:56,923 INFO L109 eAbstractionObserver]: Analyzing ICFG NestedRecursion_2b.c [2019-12-07 11:56:56,929 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 11:56:56,934 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2019-12-07 11:56:56,941 INFO L249 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2019-12-07 11:56:56,955 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 11:56:56,956 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 11:56:56,956 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 11:56:56,956 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 11:56:56,956 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 11:56:56,956 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 11:56:56,956 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 11:56:56,956 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 11:56:56,967 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2019-12-07 11:56:56,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-12-07 11:56:56,971 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:56:56,971 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-12-07 11:56:56,971 INFO L410 AbstractCegarLoop]: === Iteration 1 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 11:56:56,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:56:56,975 INFO L82 PathProgramCache]: Analyzing trace with hash 1454635077, now seen corresponding path program 1 times [2019-12-07 11:56:56,980 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 11:56:56,981 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503638539] [2019-12-07 11:56:56,981 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:56:57,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:56:57,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:56:57,085 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503638539] [2019-12-07 11:56:57,086 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 11:56:57,086 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-07 11:56:57,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078495843] [2019-12-07 11:56:57,090 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 11:56:57,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 11:56:57,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 11:56:57,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-07 11:56:57,100 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 5 states. [2019-12-07 11:56:57,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:56:57,173 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2019-12-07 11:56:57,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 11:56:57,174 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2019-12-07 11:56:57,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:56:57,180 INFO L225 Difference]: With dead ends: 41 [2019-12-07 11:56:57,181 INFO L226 Difference]: Without dead ends: 36 [2019-12-07 11:56:57,183 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-12-07 11:56:57,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-12-07 11:56:57,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 31. [2019-12-07 11:56:57,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-12-07 11:56:57,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2019-12-07 11:56:57,216 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 6 [2019-12-07 11:56:57,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:56:57,217 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2019-12-07 11:56:57,217 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 11:56:57,217 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2019-12-07 11:56:57,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-07 11:56:57,217 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:56:57,217 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:56:57,218 INFO L410 AbstractCegarLoop]: === Iteration 2 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 11:56:57,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:56:57,218 INFO L82 PathProgramCache]: Analyzing trace with hash 2144014465, now seen corresponding path program 1 times [2019-12-07 11:56:57,218 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 11:56:57,219 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804712628] [2019-12-07 11:56:57,219 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:56:57,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:56:57,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:56:57,245 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804712628] [2019-12-07 11:56:57,245 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 11:56:57,245 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-12-07 11:56:57,245 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615013443] [2019-12-07 11:56:57,247 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 11:56:57,247 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 11:56:57,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 11:56:57,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-07 11:56:57,247 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand 5 states. [2019-12-07 11:56:57,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:56:57,292 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2019-12-07 11:56:57,292 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 11:56:57,292 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2019-12-07 11:56:57,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:56:57,293 INFO L225 Difference]: With dead ends: 50 [2019-12-07 11:56:57,293 INFO L226 Difference]: Without dead ends: 46 [2019-12-07 11:56:57,294 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-12-07 11:56:57,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-12-07 11:56:57,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2019-12-07 11:56:57,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-12-07 11:56:57,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2019-12-07 11:56:57,302 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 7 [2019-12-07 11:56:57,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:56:57,303 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2019-12-07 11:56:57,303 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 11:56:57,303 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2019-12-07 11:56:57,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-07 11:56:57,303 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:56:57,303 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2019-12-07 11:56:57,303 INFO L410 AbstractCegarLoop]: === Iteration 3 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 11:56:57,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:56:57,304 INFO L82 PathProgramCache]: Analyzing trace with hash -736378463, now seen corresponding path program 1 times [2019-12-07 11:56:57,304 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 11:56:57,304 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530351744] [2019-12-07 11:56:57,304 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:56:57,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:56:57,342 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:56:57,342 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530351744] [2019-12-07 11:56:57,342 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160687007] [2019-12-07 11:56:57,342 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_01640e4a-3330-4e8b-be8d-f715c048702a/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:56:57,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:56:57,362 INFO L264 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-07 11:56:57,366 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:56:57,383 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:56:57,383 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 11:56:57,383 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2019-12-07 11:56:57,383 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180827226] [2019-12-07 11:56:57,383 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-07 11:56:57,383 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 11:56:57,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-07 11:56:57,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-12-07 11:56:57,384 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand 7 states. [2019-12-07 11:56:57,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:56:57,456 INFO L93 Difference]: Finished difference Result 63 states and 77 transitions. [2019-12-07 11:56:57,457 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-07 11:56:57,457 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2019-12-07 11:56:57,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:56:57,458 INFO L225 Difference]: With dead ends: 63 [2019-12-07 11:56:57,459 INFO L226 Difference]: Without dead ends: 62 [2019-12-07 11:56:57,459 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2019-12-07 11:56:57,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-12-07 11:56:57,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 52. [2019-12-07 11:56:57,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-12-07 11:56:57,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 66 transitions. [2019-12-07 11:56:57,469 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 66 transitions. Word has length 12 [2019-12-07 11:56:57,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:56:57,469 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 66 transitions. [2019-12-07 11:56:57,469 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-07 11:56:57,469 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 66 transitions. [2019-12-07 11:56:57,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-07 11:56:57,470 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:56:57,470 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:56:57,670 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:56:57,671 INFO L410 AbstractCegarLoop]: === Iteration 4 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 11:56:57,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:56:57,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1009328462, now seen corresponding path program 1 times [2019-12-07 11:56:57,673 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 11:56:57,673 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212521763] [2019-12-07 11:56:57,674 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:56:57,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:56:57,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:56:57,767 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 11:56:57,768 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212521763] [2019-12-07 11:56:57,768 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 11:56:57,768 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-07 11:56:57,769 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694042170] [2019-12-07 11:56:57,769 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 11:56:57,770 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 11:56:57,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 11:56:57,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-07 11:56:57,771 INFO L87 Difference]: Start difference. First operand 52 states and 66 transitions. Second operand 4 states. [2019-12-07 11:56:57,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:56:57,797 INFO L93 Difference]: Finished difference Result 78 states and 109 transitions. [2019-12-07 11:56:57,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 11:56:57,797 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2019-12-07 11:56:57,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:56:57,799 INFO L225 Difference]: With dead ends: 78 [2019-12-07 11:56:57,799 INFO L226 Difference]: Without dead ends: 77 [2019-12-07 11:56:57,800 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-07 11:56:57,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-12-07 11:56:57,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 66. [2019-12-07 11:56:57,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-12-07 11:56:57,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 84 transitions. [2019-12-07 11:56:57,809 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 84 transitions. Word has length 14 [2019-12-07 11:56:57,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:56:57,809 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 84 transitions. [2019-12-07 11:56:57,809 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 11:56:57,809 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 84 transitions. [2019-12-07 11:56:57,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-07 11:56:57,810 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:56:57,810 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:56:57,810 INFO L410 AbstractCegarLoop]: === Iteration 5 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 11:56:57,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:56:57,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1224411294, now seen corresponding path program 1 times [2019-12-07 11:56:57,810 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 11:56:57,810 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277467195] [2019-12-07 11:56:57,810 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:56:57,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:56:57,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:56:57,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 11:56:57,827 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277467195] [2019-12-07 11:56:57,827 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 11:56:57,827 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-07 11:56:57,827 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324138516] [2019-12-07 11:56:57,828 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 11:56:57,828 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 11:56:57,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 11:56:57,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 11:56:57,828 INFO L87 Difference]: Start difference. First operand 66 states and 84 transitions. Second operand 3 states. [2019-12-07 11:56:57,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:56:57,838 INFO L93 Difference]: Finished difference Result 66 states and 84 transitions. [2019-12-07 11:56:57,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 11:56:57,839 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2019-12-07 11:56:57,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:56:57,840 INFO L225 Difference]: With dead ends: 66 [2019-12-07 11:56:57,840 INFO L226 Difference]: Without dead ends: 65 [2019-12-07 11:56:57,841 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 11:56:57,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-12-07 11:56:57,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2019-12-07 11:56:57,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-12-07 11:56:57,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 80 transitions. [2019-12-07 11:56:57,851 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 80 transitions. Word has length 15 [2019-12-07 11:56:57,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:56:57,852 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 80 transitions. [2019-12-07 11:56:57,852 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 11:56:57,852 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 80 transitions. [2019-12-07 11:56:57,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-07 11:56:57,852 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:56:57,853 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1] [2019-12-07 11:56:57,853 INFO L410 AbstractCegarLoop]: === Iteration 6 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 11:56:57,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:56:57,853 INFO L82 PathProgramCache]: Analyzing trace with hash -231947135, now seen corresponding path program 2 times [2019-12-07 11:56:57,853 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 11:56:57,854 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665592421] [2019-12-07 11:56:57,854 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:56:57,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:56:57,893 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:56:57,894 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665592421] [2019-12-07 11:56:57,894 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434229327] [2019-12-07 11:56:57,894 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_01640e4a-3330-4e8b-be8d-f715c048702a/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:56:57,913 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 11:56:57,914 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 11:56:57,914 INFO L264 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-07 11:56:57,916 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:56:57,922 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:56:57,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 11:56:57,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2019-12-07 11:56:57,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121935450] [2019-12-07 11:56:57,923 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-07 11:56:57,923 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 11:56:57,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-07 11:56:57,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-12-07 11:56:57,923 INFO L87 Difference]: Start difference. First operand 65 states and 80 transitions. Second operand 9 states. [2019-12-07 11:56:58,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:56:58,010 INFO L93 Difference]: Finished difference Result 85 states and 101 transitions. [2019-12-07 11:56:58,011 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-07 11:56:58,011 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2019-12-07 11:56:58,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:56:58,012 INFO L225 Difference]: With dead ends: 85 [2019-12-07 11:56:58,012 INFO L226 Difference]: Without dead ends: 84 [2019-12-07 11:56:58,012 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2019-12-07 11:56:58,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-12-07 11:56:58,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 81. [2019-12-07 11:56:58,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-12-07 11:56:58,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 100 transitions. [2019-12-07 11:56:58,020 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 100 transitions. Word has length 17 [2019-12-07 11:56:58,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:56:58,020 INFO L462 AbstractCegarLoop]: Abstraction has 81 states and 100 transitions. [2019-12-07 11:56:58,020 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-07 11:56:58,021 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 100 transitions. [2019-12-07 11:56:58,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-07 11:56:58,021 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:56:58,021 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:56:58,222 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:56:58,222 INFO L410 AbstractCegarLoop]: === Iteration 7 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 11:56:58,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:56:58,223 INFO L82 PathProgramCache]: Analyzing trace with hash -855233152, now seen corresponding path program 1 times [2019-12-07 11:56:58,223 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 11:56:58,223 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832564387] [2019-12-07 11:56:58,223 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:56:58,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:56:58,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:56:58,324 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 11:56:58,324 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832564387] [2019-12-07 11:56:58,324 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 11:56:58,325 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-12-07 11:56:58,325 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356771091] [2019-12-07 11:56:58,326 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-07 11:56:58,326 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 11:56:58,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-07 11:56:58,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-12-07 11:56:58,327 INFO L87 Difference]: Start difference. First operand 81 states and 100 transitions. Second operand 6 states. [2019-12-07 11:56:58,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:56:58,479 INFO L93 Difference]: Finished difference Result 117 states and 149 transitions. [2019-12-07 11:56:58,479 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-07 11:56:58,479 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2019-12-07 11:56:58,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:56:58,481 INFO L225 Difference]: With dead ends: 117 [2019-12-07 11:56:58,481 INFO L226 Difference]: Without dead ends: 116 [2019-12-07 11:56:58,482 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-12-07 11:56:58,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2019-12-07 11:56:58,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 109. [2019-12-07 11:56:58,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2019-12-07 11:56:58,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 143 transitions. [2019-12-07 11:56:58,498 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 143 transitions. Word has length 19 [2019-12-07 11:56:58,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:56:58,499 INFO L462 AbstractCegarLoop]: Abstraction has 109 states and 143 transitions. [2019-12-07 11:56:58,499 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-07 11:56:58,499 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 143 transitions. [2019-12-07 11:56:58,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-07 11:56:58,500 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:56:58,500 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:56:58,500 INFO L410 AbstractCegarLoop]: === Iteration 8 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 11:56:58,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:56:58,500 INFO L82 PathProgramCache]: Analyzing trace with hash -742423898, now seen corresponding path program 1 times [2019-12-07 11:56:58,501 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 11:56:58,501 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541116266] [2019-12-07 11:56:58,501 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:56:58,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:56:58,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:56:58,532 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 11:56:58,533 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541116266] [2019-12-07 11:56:58,533 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 11:56:58,533 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-12-07 11:56:58,533 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769371137] [2019-12-07 11:56:58,533 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-07 11:56:58,533 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 11:56:58,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-07 11:56:58,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-12-07 11:56:58,534 INFO L87 Difference]: Start difference. First operand 109 states and 143 transitions. Second operand 6 states. [2019-12-07 11:56:58,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:56:58,577 INFO L93 Difference]: Finished difference Result 130 states and 174 transitions. [2019-12-07 11:56:58,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-07 11:56:58,578 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2019-12-07 11:56:58,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:56:58,579 INFO L225 Difference]: With dead ends: 130 [2019-12-07 11:56:58,579 INFO L226 Difference]: Without dead ends: 66 [2019-12-07 11:56:58,581 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-12-07 11:56:58,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-12-07 11:56:58,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 35. [2019-12-07 11:56:58,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-12-07 11:56:58,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2019-12-07 11:56:58,585 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 20 [2019-12-07 11:56:58,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:56:58,586 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2019-12-07 11:56:58,586 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-07 11:56:58,586 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2019-12-07 11:56:58,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-12-07 11:56:58,587 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:56:58,587 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 1, 1, 1, 1] [2019-12-07 11:56:58,587 INFO L410 AbstractCegarLoop]: === Iteration 9 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 11:56:58,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:56:58,587 INFO L82 PathProgramCache]: Analyzing trace with hash -559247967, now seen corresponding path program 3 times [2019-12-07 11:56:58,587 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 11:56:58,588 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73966379] [2019-12-07 11:56:58,588 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:56:58,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:56:58,649 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:56:58,649 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73966379] [2019-12-07 11:56:58,649 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697866481] [2019-12-07 11:56:58,649 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_01640e4a-3330-4e8b-be8d-f715c048702a/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:56:58,666 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-07 11:56:58,667 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 11:56:58,667 INFO L264 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-07 11:56:58,668 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:56:58,674 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:56:58,674 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 11:56:58,674 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2019-12-07 11:56:58,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150842800] [2019-12-07 11:56:58,675 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-07 11:56:58,675 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 11:56:58,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-07 11:56:58,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2019-12-07 11:56:58,675 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand 11 states. [2019-12-07 11:56:58,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:56:58,778 INFO L93 Difference]: Finished difference Result 62 states and 67 transitions. [2019-12-07 11:56:58,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-07 11:56:58,779 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 22 [2019-12-07 11:56:58,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:56:58,779 INFO L225 Difference]: With dead ends: 62 [2019-12-07 11:56:58,780 INFO L226 Difference]: Without dead ends: 61 [2019-12-07 11:56:58,780 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2019-12-07 11:56:58,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-12-07 11:56:58,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 42. [2019-12-07 11:56:58,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-12-07 11:56:58,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2019-12-07 11:56:58,784 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 22 [2019-12-07 11:56:58,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:56:58,785 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2019-12-07 11:56:58,785 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-07 11:56:58,785 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2019-12-07 11:56:58,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-12-07 11:56:58,785 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:56:58,786 INFO L410 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:56:58,986 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:56:58,987 INFO L410 AbstractCegarLoop]: === Iteration 10 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 11:56:58,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:56:58,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1606295908, now seen corresponding path program 2 times [2019-12-07 11:56:58,989 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 11:56:58,990 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660357066] [2019-12-07 11:56:58,990 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:56:59,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:56:59,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:56:59,060 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 11:56:59,060 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660357066] [2019-12-07 11:56:59,060 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098917184] [2019-12-07 11:56:59,060 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_01640e4a-3330-4e8b-be8d-f715c048702a/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:56:59,080 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 11:56:59,080 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 11:56:59,081 INFO L264 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-07 11:56:59,082 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:56:59,086 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 11:56:59,086 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 11:56:59,086 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2019-12-07 11:56:59,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853260443] [2019-12-07 11:56:59,087 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-07 11:56:59,087 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 11:56:59,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-07 11:56:59,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-12-07 11:56:59,087 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 8 states. [2019-12-07 11:56:59,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:56:59,151 INFO L93 Difference]: Finished difference Result 70 states and 79 transitions. [2019-12-07 11:56:59,151 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-07 11:56:59,151 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2019-12-07 11:56:59,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:56:59,152 INFO L225 Difference]: With dead ends: 70 [2019-12-07 11:56:59,152 INFO L226 Difference]: Without dead ends: 54 [2019-12-07 11:56:59,153 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2019-12-07 11:56:59,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-12-07 11:56:59,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 47. [2019-12-07 11:56:59,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-12-07 11:56:59,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2019-12-07 11:56:59,157 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 25 [2019-12-07 11:56:59,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:56:59,158 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2019-12-07 11:56:59,158 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-07 11:56:59,158 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2019-12-07 11:56:59,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-12-07 11:56:59,159 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:56:59,159 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1] [2019-12-07 11:56:59,359 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:56:59,360 INFO L410 AbstractCegarLoop]: === Iteration 11 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 11:56:59,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:56:59,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1828550785, now seen corresponding path program 4 times [2019-12-07 11:56:59,361 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 11:56:59,362 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693816896] [2019-12-07 11:56:59,362 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:56:59,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:56:59,437 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:56:59,437 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693816896] [2019-12-07 11:56:59,437 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585762540] [2019-12-07 11:56:59,438 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_01640e4a-3330-4e8b-be8d-f715c048702a/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:56:59,455 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 11:56:59,455 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 11:56:59,455 INFO L264 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 16 conjunts are in the unsatisfiable core [2019-12-07 11:56:59,456 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:56:59,486 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-12-07 11:56:59,487 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 11:56:59,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5] total 13 [2019-12-07 11:56:59,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285772425] [2019-12-07 11:56:59,487 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-07 11:56:59,487 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 11:56:59,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-07 11:56:59,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2019-12-07 11:56:59,488 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 14 states. [2019-12-07 11:56:59,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:56:59,527 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2019-12-07 11:56:59,528 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-07 11:56:59,528 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 27 [2019-12-07 11:56:59,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:56:59,528 INFO L225 Difference]: With dead ends: 61 [2019-12-07 11:56:59,528 INFO L226 Difference]: Without dead ends: 60 [2019-12-07 11:56:59,529 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2019-12-07 11:56:59,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-12-07 11:56:59,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 33. [2019-12-07 11:56:59,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-12-07 11:56:59,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2019-12-07 11:56:59,532 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 27 [2019-12-07 11:56:59,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:56:59,532 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2019-12-07 11:56:59,532 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-07 11:56:59,532 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2019-12-07 11:56:59,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-12-07 11:56:59,533 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:56:59,533 INFO L410 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:56:59,733 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:56:59,734 INFO L410 AbstractCegarLoop]: === Iteration 12 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 11:56:59,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:56:59,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1103662182, now seen corresponding path program 3 times [2019-12-07 11:56:59,736 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 11:56:59,736 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754068259] [2019-12-07 11:56:59,736 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:56:59,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:56:59,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:56:59,812 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 20 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 11:56:59,812 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754068259] [2019-12-07 11:56:59,812 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206023561] [2019-12-07 11:56:59,812 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_01640e4a-3330-4e8b-be8d-f715c048702a/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:56:59,834 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-12-07 11:56:59,834 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 11:56:59,835 INFO L264 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-07 11:56:59,836 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:56:59,840 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 20 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 11:56:59,841 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 11:56:59,841 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2019-12-07 11:56:59,841 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152721513] [2019-12-07 11:56:59,841 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-07 11:56:59,841 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 11:56:59,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-07 11:56:59,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-12-07 11:56:59,842 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 10 states. [2019-12-07 11:56:59,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:56:59,926 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2019-12-07 11:56:59,927 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-07 11:56:59,927 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2019-12-07 11:56:59,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:56:59,927 INFO L225 Difference]: With dead ends: 42 [2019-12-07 11:56:59,927 INFO L226 Difference]: Without dead ends: 0 [2019-12-07 11:56:59,928 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2019-12-07 11:56:59,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-12-07 11:56:59,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-12-07 11:56:59,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-12-07 11:56:59,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-12-07 11:56:59,929 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 30 [2019-12-07 11:56:59,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:56:59,929 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-07 11:56:59,929 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-07 11:56:59,929 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-12-07 11:56:59,929 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-12-07 11:57:00,130 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:57:00,135 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-12-07 11:57:00,493 WARN L192 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 25 [2019-12-07 11:57:00,566 INFO L246 CegarLoopResult]: For program point gFINAL(lines 10 16) no Hoare annotation was computed. [2019-12-07 11:57:00,566 INFO L246 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2019-12-07 11:57:00,566 INFO L246 CegarLoopResult]: For program point L15-1(line 15) no Hoare annotation was computed. [2019-12-07 11:57:00,566 INFO L242 CegarLoopResult]: At program point L15-2(line 15) the Hoare annotation is: (and (or (<= 2 g_~x) (not (<= 2 |g_#in~x|)) (not (<= |g_#in~x| 2))) (or (and (<= 0 g_~x) (<= g_~x 2147483647) (not (= 0 g_~x))) (not (<= 0 |g_#in~x|)) (not (<= |g_#in~x| 2147483647)))) [2019-12-07 11:57:00,566 INFO L246 CegarLoopResult]: For program point L12(lines 12 15) no Hoare annotation was computed. [2019-12-07 11:57:00,566 INFO L246 CegarLoopResult]: For program point L15-3(line 15) no Hoare annotation was computed. [2019-12-07 11:57:00,566 INFO L246 CegarLoopResult]: For program point L15-4(line 15) no Hoare annotation was computed. [2019-12-07 11:57:00,566 INFO L246 CegarLoopResult]: For program point L15-5(line 15) no Hoare annotation was computed. [2019-12-07 11:57:00,566 INFO L246 CegarLoopResult]: For program point gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 15) no Hoare annotation was computed. [2019-12-07 11:57:00,566 INFO L242 CegarLoopResult]: At program point L15-6(line 15) the Hoare annotation is: (let ((.cse0 (not (<= 0 |g_#in~x|))) (.cse1 (not (<= |g_#in~x| 2147483647)))) (and (or (not (<= 2 |g_#in~x|)) (not (<= |g_#in~x| 2))) (or (<= 1 g_~x) .cse0 .cse1) (or .cse0 (and (<= g_~x 2147483647) (<= |g_#t~ret0| 1) (<= 1 |g_#t~ret0|)) .cse1))) [2019-12-07 11:57:00,567 INFO L246 CegarLoopResult]: For program point gEXIT(lines 10 16) no Hoare annotation was computed. [2019-12-07 11:57:00,567 INFO L246 CegarLoopResult]: For program point L15-7(line 15) no Hoare annotation was computed. [2019-12-07 11:57:00,567 INFO L249 CegarLoopResult]: At program point gENTRY(lines 10 16) the Hoare annotation is: true [2019-12-07 11:57:00,567 INFO L246 CegarLoopResult]: For program point gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 15) no Hoare annotation was computed. [2019-12-07 11:57:00,567 INFO L246 CegarLoopResult]: For program point gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 15) no Hoare annotation was computed. [2019-12-07 11:57:00,567 INFO L246 CegarLoopResult]: For program point gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 15) no Hoare annotation was computed. [2019-12-07 11:57:00,567 INFO L246 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-12-07 11:57:00,567 INFO L246 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-12-07 11:57:00,567 INFO L246 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-12-07 11:57:00,567 INFO L242 CegarLoopResult]: At program point L21(line 21) the Hoare annotation is: (and (<= ULTIMATE.start_main_~x~0 2147483647) (<= 0 ULTIMATE.start_main_~x~0)) [2019-12-07 11:57:00,567 INFO L246 CegarLoopResult]: For program point L20(line 20) no Hoare annotation was computed. [2019-12-07 11:57:00,567 INFO L246 CegarLoopResult]: For program point L21-1(line 21) no Hoare annotation was computed. [2019-12-07 11:57:00,567 INFO L242 CegarLoopResult]: At program point L18(lines 18 22) the Hoare annotation is: (<= ULTIMATE.start_main_~x~0 2147483647) [2019-12-07 11:57:00,578 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 11:57:00 BoogieIcfgContainer [2019-12-07 11:57:00,578 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 11:57:00,578 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 11:57:00,578 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 11:57:00,578 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 11:57:00,579 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 11:56:56" (3/4) ... [2019-12-07 11:57:00,581 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-12-07 11:57:00,585 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure g [2019-12-07 11:57:00,589 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2019-12-07 11:57:00,589 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-12-07 11:57:00,617 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_01640e4a-3330-4e8b-be8d-f715c048702a/bin/uautomizer/witness.graphml [2019-12-07 11:57:00,617 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 11:57:00,618 INFO L168 Benchmark]: Toolchain (without parser) took 4055.13 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 97.5 MB). Free memory was 938.0 MB in the beginning and 874.4 MB in the end (delta: 63.6 MB). Peak memory consumption was 161.1 MB. Max. memory is 11.5 GB. [2019-12-07 11:57:00,619 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 955.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 11:57:00,619 INFO L168 Benchmark]: CACSL2BoogieTranslator took 175.78 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 97.5 MB). Free memory was 938.0 MB in the beginning and 1.1 GB in the end (delta: -154.4 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. [2019-12-07 11:57:00,619 INFO L168 Benchmark]: Boogie Procedure Inliner took 21.17 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 11:57:00,619 INFO L168 Benchmark]: Boogie Preprocessor took 11.00 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 11:57:00,620 INFO L168 Benchmark]: RCFGBuilder took 145.23 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 11.5 GB. [2019-12-07 11:57:00,620 INFO L168 Benchmark]: TraceAbstraction took 3659.36 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 881.1 MB in the end (delta: 194.8 MB). Peak memory consumption was 194.8 MB. Max. memory is 11.5 GB. [2019-12-07 11:57:00,620 INFO L168 Benchmark]: Witness Printer took 39.19 ms. Allocated memory is still 1.1 GB. Free memory was 881.1 MB in the beginning and 874.4 MB in the end (delta: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. [2019-12-07 11:57:00,622 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 955.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 175.78 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 97.5 MB). Free memory was 938.0 MB in the beginning and 1.1 GB in the end (delta: -154.4 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 21.17 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 11.00 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 145.23 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 3659.36 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 881.1 MB in the end (delta: 194.8 MB). Peak memory consumption was 194.8 MB. Max. memory is 11.5 GB. * Witness Printer took 39.19 ms. Allocated memory is still 1.1 GB. Free memory was 881.1 MB in the beginning and 874.4 MB in the end (delta: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 15]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 15]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 15]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 15]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - AllSpecificationsHoldResult: All specifications hold 4 specifications checked. All of them hold - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: x <= 2147483647 - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 23 locations, 4 error locations. Result: SAFE, OverallTime: 3.1s, OverallIterations: 12, TraceHistogramMax: 5, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.4s, HoareTripleCheckerStatistics: 201 SDtfs, 335 SDslu, 659 SDs, 0 SdLazy, 621 SolverSat, 115 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 250 GetRequests, 146 SyntacticMatches, 4 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=109occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 12 MinimizatonAttempts, 126 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 62 PreInvPairs, 67 NumberOfFragments, 85 HoareAnnotationTreeSize, 62 FomulaSimplifications, 18966 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 5 FomulaSimplificationsInter, 4821 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 347 NumberOfCodeBlocks, 347 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 329 ConstructedInterpolants, 0 QuantifiedInterpolants, 21879 SizeOfPredicates, 19 NumberOfNonLiveVariables, 265 ConjunctsInSsa, 56 ConjunctsInUnsatCore, 18 InterpolantComputations, 6 PerfectInterpolantSequences, 131/307 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...