./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/reducercommutativity/rangesum20_false-unreach-call.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5842f4b8 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_6547d8b8-79aa-4702-a824-ddda61b6886f/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_6547d8b8-79aa-4702-a824-ddda61b6886f/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_6547d8b8-79aa-4702-a824-ddda61b6886f/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_6547d8b8-79aa-4702-a824-ddda61b6886f/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/reducercommutativity/rangesum20_false-unreach-call.i -s /tmp/vcloud-vcloud-master/worker/working_dir_6547d8b8-79aa-4702-a824-ddda61b6886f/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_6547d8b8-79aa-4702-a824-ddda61b6886f/bin-2019/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d02e722fa6530375aea2bbc43a68e422ad66c6f3 .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_6547d8b8-79aa-4702-a824-ddda61b6886f/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_6547d8b8-79aa-4702-a824-ddda61b6886f/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_6547d8b8-79aa-4702-a824-ddda61b6886f/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_6547d8b8-79aa-4702-a824-ddda61b6886f/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/reducercommutativity/rangesum20_false-unreach-call.i -s /tmp/vcloud-vcloud-master/worker/working_dir_6547d8b8-79aa-4702-a824-ddda61b6886f/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_6547d8b8-79aa-4702-a824-ddda61b6886f/bin-2019/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d02e722fa6530375aea2bbc43a68e422ad66c6f3 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.23-5842f4b [2018-11-18 13:31:41,984 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-18 13:31:41,986 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-18 13:31:41,993 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-18 13:31:41,993 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-18 13:31:41,994 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-18 13:31:41,995 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-18 13:31:41,996 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-18 13:31:41,997 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-18 13:31:41,998 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-18 13:31:41,999 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-18 13:31:41,999 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-18 13:31:42,000 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-18 13:31:42,000 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-18 13:31:42,001 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-18 13:31:42,002 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-18 13:31:42,002 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-18 13:31:42,004 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-18 13:31:42,005 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-18 13:31:42,006 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-18 13:31:42,007 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-18 13:31:42,008 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-18 13:31:42,010 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-18 13:31:42,010 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-18 13:31:42,010 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-18 13:31:42,011 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-18 13:31:42,012 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-18 13:31:42,012 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-18 13:31:42,013 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-18 13:31:42,014 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-18 13:31:42,014 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-18 13:31:42,014 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-18 13:31:42,015 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-18 13:31:42,015 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-18 13:31:42,015 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-18 13:31:42,016 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-18 13:31:42,016 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_6547d8b8-79aa-4702-a824-ddda61b6886f/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-11-18 13:31:42,026 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-18 13:31:42,027 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-18 13:31:42,027 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-18 13:31:42,028 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-18 13:31:42,028 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-18 13:31:42,028 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-18 13:31:42,028 INFO L133 SettingsManager]: * Explicit value domain=true [2018-11-18 13:31:42,028 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-18 13:31:42,028 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-18 13:31:42,029 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-18 13:31:42,029 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-18 13:31:42,029 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-18 13:31:42,029 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-18 13:31:42,030 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-18 13:31:42,030 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-18 13:31:42,030 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-18 13:31:42,030 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-18 13:31:42,030 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-18 13:31:42,030 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-18 13:31:42,031 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-18 13:31:42,031 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-18 13:31:42,031 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-18 13:31:42,031 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-18 13:31:42,031 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-18 13:31:42,031 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-18 13:31:42,032 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-18 13:31:42,032 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-18 13:31:42,032 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-18 13:31:42,032 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-18 13:31:42,032 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 13:31:42,032 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-18 13:31:42,032 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-18 13:31:42,033 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-18 13:31:42,033 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-18 13:31:42,033 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-18 13:31:42,033 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-18 13:31:42,033 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-18 13:31:42,033 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/working_dir_6547d8b8-79aa-4702-a824-ddda61b6886f/bin-2019/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d02e722fa6530375aea2bbc43a68e422ad66c6f3 [2018-11-18 13:31:42,057 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-18 13:31:42,066 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-18 13:31:42,069 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-18 13:31:42,069 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-18 13:31:42,070 INFO L276 PluginConnector]: CDTParser initialized [2018-11-18 13:31:42,070 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_6547d8b8-79aa-4702-a824-ddda61b6886f/bin-2019/utaipan/../../sv-benchmarks/c/reducercommutativity/rangesum20_false-unreach-call.i [2018-11-18 13:31:42,105 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_6547d8b8-79aa-4702-a824-ddda61b6886f/bin-2019/utaipan/data/3be0cc8e9/f3e7a48913a84d279fb87aacd1ac5f23/FLAG382b6d04e [2018-11-18 13:31:42,512 INFO L307 CDTParser]: Found 1 translation units. [2018-11-18 13:31:42,513 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_6547d8b8-79aa-4702-a824-ddda61b6886f/sv-benchmarks/c/reducercommutativity/rangesum20_false-unreach-call.i [2018-11-18 13:31:42,517 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_6547d8b8-79aa-4702-a824-ddda61b6886f/bin-2019/utaipan/data/3be0cc8e9/f3e7a48913a84d279fb87aacd1ac5f23/FLAG382b6d04e [2018-11-18 13:31:42,526 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_6547d8b8-79aa-4702-a824-ddda61b6886f/bin-2019/utaipan/data/3be0cc8e9/f3e7a48913a84d279fb87aacd1ac5f23 [2018-11-18 13:31:42,528 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-18 13:31:42,529 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-18 13:31:42,530 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-18 13:31:42,530 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-18 13:31:42,532 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-18 13:31:42,533 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 01:31:42" (1/1) ... [2018-11-18 13:31:42,534 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1907b880 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:31:42, skipping insertion in model container [2018-11-18 13:31:42,535 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 01:31:42" (1/1) ... [2018-11-18 13:31:42,542 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-18 13:31:42,555 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-18 13:31:42,661 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 13:31:42,666 INFO L191 MainTranslator]: Completed pre-run [2018-11-18 13:31:42,682 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 13:31:42,691 INFO L195 MainTranslator]: Completed translation [2018-11-18 13:31:42,691 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:31:42 WrapperNode [2018-11-18 13:31:42,692 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-18 13:31:42,692 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-18 13:31:42,692 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-18 13:31:42,692 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-18 13:31:42,698 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:31:42" (1/1) ... [2018-11-18 13:31:42,704 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:31:42" (1/1) ... [2018-11-18 13:31:42,709 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-18 13:31:42,709 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-18 13:31:42,709 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-18 13:31:42,709 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-18 13:31:42,718 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:31:42" (1/1) ... [2018-11-18 13:31:42,718 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:31:42" (1/1) ... [2018-11-18 13:31:42,720 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:31:42" (1/1) ... [2018-11-18 13:31:42,720 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:31:42" (1/1) ... [2018-11-18 13:31:42,766 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:31:42" (1/1) ... [2018-11-18 13:31:42,770 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:31:42" (1/1) ... [2018-11-18 13:31:42,772 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:31:42" (1/1) ... [2018-11-18 13:31:42,773 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-18 13:31:42,774 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-18 13:31:42,774 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-18 13:31:42,774 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-18 13:31:42,775 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:31:42" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6547d8b8-79aa-4702-a824-ddda61b6886f/bin-2019/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 13:31:42,820 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-11-18 13:31:42,820 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-18 13:31:42,820 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-18 13:31:42,820 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-11-18 13:31:42,820 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-18 13:31:42,820 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-18 13:31:42,820 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2018-11-18 13:31:42,820 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-18 13:31:42,821 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-18 13:31:42,821 INFO L130 BoogieDeclarations]: Found specification of procedure rangesum [2018-11-18 13:31:42,821 INFO L138 BoogieDeclarations]: Found implementation of procedure rangesum [2018-11-18 13:31:42,821 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-11-18 13:31:42,821 INFO L130 BoogieDeclarations]: Found specification of procedure init_nondet [2018-11-18 13:31:42,821 INFO L138 BoogieDeclarations]: Found implementation of procedure init_nondet [2018-11-18 13:31:43,024 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-18 13:31:43,025 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 01:31:43 BoogieIcfgContainer [2018-11-18 13:31:43,025 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-18 13:31:43,025 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-18 13:31:43,025 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-18 13:31:43,028 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-18 13:31:43,028 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 01:31:42" (1/3) ... [2018-11-18 13:31:43,029 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ad8e190 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 01:31:43, skipping insertion in model container [2018-11-18 13:31:43,029 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:31:42" (2/3) ... [2018-11-18 13:31:43,030 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ad8e190 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 01:31:43, skipping insertion in model container [2018-11-18 13:31:43,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 01:31:43" (3/3) ... [2018-11-18 13:31:43,031 INFO L112 eAbstractionObserver]: Analyzing ICFG rangesum20_false-unreach-call.i [2018-11-18 13:31:43,041 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-18 13:31:43,047 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-18 13:31:43,062 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-18 13:31:43,089 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-18 13:31:43,090 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-18 13:31:43,090 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-18 13:31:43,090 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-18 13:31:43,090 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-18 13:31:43,090 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-18 13:31:43,090 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-18 13:31:43,090 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-18 13:31:43,105 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2018-11-18 13:31:43,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-11-18 13:31:43,110 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:31:43,111 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:31:43,113 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:31:43,118 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:31:43,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1049289672, now seen corresponding path program 1 times [2018-11-18 13:31:43,119 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 13:31:43,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:31:43,150 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:31:43,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:31:43,150 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 13:31:43,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:31:43,205 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2018-11-18 13:31:43,205 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:31:43,205 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 13:31:43,206 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 38 with the following transitions: [2018-11-18 13:31:43,208 INFO L202 CegarAbsIntRunner]: [0], [1], [5], [7], [9], [11], [24], [26], [28], [31], [32], [39], [57], [61], [63], [64], [77], [79], [80], [81], [82], [84], [85], [86], [87], [88], [89], [90], [91] [2018-11-18 13:31:43,236 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 13:31:43,236 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 13:31:43,320 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-18 13:31:43,322 INFO L272 AbstractInterpreter]: Visited 9 different actions 9 times. Never merged. Never widened. Performed 56 root evaluator evaluations with a maximum evaluation depth of 3. Performed 56 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Never found a fixpoint. Largest state had 23 variables. [2018-11-18 13:31:43,327 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:31:43,327 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-18 13:31:43,377 INFO L227 lantSequenceWeakener]: Weakened 7 states. On average, predicates are now at 90.48% of their original sizes. [2018-11-18 13:31:43,377 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-18 13:31:43,388 INFO L415 sIntCurrentIteration]: We unified 36 AI predicates to 36 [2018-11-18 13:31:43,388 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-18 13:31:43,389 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 13:31:43,390 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-18 13:31:43,390 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 13:31:43,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-18 13:31:43,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-18 13:31:43,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-18 13:31:43,402 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 4 states. [2018-11-18 13:31:43,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:31:43,500 INFO L93 Difference]: Finished difference Result 69 states and 90 transitions. [2018-11-18 13:31:43,500 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-18 13:31:43,501 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 37 [2018-11-18 13:31:43,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:31:43,508 INFO L225 Difference]: With dead ends: 69 [2018-11-18 13:31:43,508 INFO L226 Difference]: Without dead ends: 35 [2018-11-18 13:31:43,510 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 36 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-18 13:31:43,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-11-18 13:31:43,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-11-18 13:31:43,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-11-18 13:31:43,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2018-11-18 13:31:43,544 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 37 [2018-11-18 13:31:43,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:31:43,544 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2018-11-18 13:31:43,544 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-18 13:31:43,544 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2018-11-18 13:31:43,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-11-18 13:31:43,546 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:31:43,546 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:31:43,547 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:31:43,547 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:31:43,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1338067039, now seen corresponding path program 1 times [2018-11-18 13:31:43,547 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 13:31:43,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:31:43,548 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:31:43,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:31:43,549 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 13:31:43,559 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-18 13:31:43,559 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-18 13:31:43,559 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6547d8b8-79aa-4702-a824-ddda61b6886f/bin-2019/utaipan/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 [2018-11-18 13:31:43,573 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:31:43,574 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-11-18 13:31:43,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:31:43,605 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 43 with the following transitions: [2018-11-18 13:31:43,605 INFO L202 CegarAbsIntRunner]: [0], [1], [5], [7], [9], [11], [15], [18], [26], [28], [31], [32], [39], [43], [46], [61], [63], [64], [68], [71], [79], [80], [81], [82], [84], [85], [86], [87], [88], [89], [90], [91] [2018-11-18 13:31:43,607 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 13:31:43,607 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 13:31:43,620 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-18 13:31:43,620 INFO L272 AbstractInterpreter]: Visited 10 different actions 10 times. Never merged. Never widened. Performed 57 root evaluator evaluations with a maximum evaluation depth of 3. Performed 57 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Never found a fixpoint. Largest state had 23 variables. [2018-11-18 13:31:43,625 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:31:43,625 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-18 13:31:43,645 INFO L227 lantSequenceWeakener]: Weakened 8 states. On average, predicates are now at 88.89% of their original sizes. [2018-11-18 13:31:43,645 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-18 13:31:43,677 INFO L415 sIntCurrentIteration]: We unified 41 AI predicates to 41 [2018-11-18 13:31:43,677 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-18 13:31:43,678 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 13:31:43,678 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-18 13:31:43,678 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 13:31:43,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 13:31:43,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 13:31:43,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 13:31:43,680 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand 5 states. [2018-11-18 13:31:43,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:31:43,798 INFO L93 Difference]: Finished difference Result 62 states and 74 transitions. [2018-11-18 13:31:43,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 13:31:43,799 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 42 [2018-11-18 13:31:43,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:31:43,799 INFO L225 Difference]: With dead ends: 62 [2018-11-18 13:31:43,800 INFO L226 Difference]: Without dead ends: 38 [2018-11-18 13:31:43,801 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 42 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-18 13:31:43,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-11-18 13:31:43,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2018-11-18 13:31:43,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-11-18 13:31:43,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2018-11-18 13:31:43,807 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 42 [2018-11-18 13:31:43,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:31:43,807 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2018-11-18 13:31:43,807 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 13:31:43,808 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2018-11-18 13:31:43,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-11-18 13:31:43,808 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:31:43,808 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:31:43,809 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:31:43,809 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:31:43,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1866850875, now seen corresponding path program 1 times [2018-11-18 13:31:43,809 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 13:31:43,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:31:43,810 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:31:43,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:31:43,810 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 13:31:43,821 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-18 13:31:43,821 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-18 13:31:43,821 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6547d8b8-79aa-4702-a824-ddda61b6886f/bin-2019/utaipan/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 [2018-11-18 13:31:43,834 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:31:43,834 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-11-18 13:31:43,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:31:43,871 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 46 with the following transitions: [2018-11-18 13:31:43,871 INFO L202 CegarAbsIntRunner]: [0], [1], [5], [7], [9], [11], [15], [18], [26], [28], [31], [32], [39], [43], [46], [61], [63], [64], [68], [71], [73], [75], [79], [80], [81], [82], [84], [85], [86], [87], [88], [89], [90], [91] [2018-11-18 13:31:43,873 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 13:31:43,873 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 13:31:43,905 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-18 13:31:43,905 INFO L272 AbstractInterpreter]: Visited 19 different actions 31 times. Merged at 3 different actions 9 times. Never widened. Performed 151 root evaluator evaluations with a maximum evaluation depth of 3. Performed 151 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 2 fixpoints after 2 different actions. Largest state had 23 variables. [2018-11-18 13:31:43,908 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:31:43,908 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-18 13:31:43,934 INFO L227 lantSequenceWeakener]: Weakened 18 states. On average, predicates are now at 84.93% of their original sizes. [2018-11-18 13:31:43,934 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-18 13:31:43,961 INFO L415 sIntCurrentIteration]: We unified 44 AI predicates to 44 [2018-11-18 13:31:43,961 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-18 13:31:43,961 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 13:31:43,961 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-11-18 13:31:43,962 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 13:31:43,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-18 13:31:43,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-18 13:31:43,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-11-18 13:31:43,962 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand 7 states. [2018-11-18 13:31:44,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:31:44,223 INFO L93 Difference]: Finished difference Result 61 states and 76 transitions. [2018-11-18 13:31:44,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-18 13:31:44,223 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 45 [2018-11-18 13:31:44,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:31:44,224 INFO L225 Difference]: With dead ends: 61 [2018-11-18 13:31:44,224 INFO L226 Difference]: Without dead ends: 41 [2018-11-18 13:31:44,225 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 47 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2018-11-18 13:31:44,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-11-18 13:31:44,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2018-11-18 13:31:44,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-11-18 13:31:44,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2018-11-18 13:31:44,231 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 45 [2018-11-18 13:31:44,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:31:44,232 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2018-11-18 13:31:44,232 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-18 13:31:44,232 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2018-11-18 13:31:44,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-11-18 13:31:44,233 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:31:44,233 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:31:44,233 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:31:44,234 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:31:44,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1254084674, now seen corresponding path program 1 times [2018-11-18 13:31:44,234 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 13:31:44,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:31:44,235 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:31:44,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:31:44,235 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 13:31:44,249 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-18 13:31:44,250 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-18 13:31:44,250 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6547d8b8-79aa-4702-a824-ddda61b6886f/bin-2019/utaipan/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 [2018-11-18 13:31:44,257 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:31:44,257 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-11-18 13:31:44,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:31:44,293 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 58 with the following transitions: [2018-11-18 13:31:44,294 INFO L202 CegarAbsIntRunner]: [0], [1], [5], [7], [9], [11], [15], [18], [26], [28], [31], [32], [39], [43], [46], [48], [53], [55], [61], [63], [64], [68], [71], [73], [75], [79], [80], [81], [82], [84], [85], [86], [87], [88], [89], [90], [91] [2018-11-18 13:31:44,295 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 13:31:44,295 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 13:31:44,520 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-18 13:31:44,521 INFO L272 AbstractInterpreter]: Visited 23 different actions 56 times. Merged at 8 different actions 26 times. Never widened. Performed 219 root evaluator evaluations with a maximum evaluation depth of 10. Performed 219 inverse root evaluator evaluations with a maximum inverse evaluation depth of 10. Found 4 fixpoints after 4 different actions. Largest state had 23 variables. [2018-11-18 13:31:44,540 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:31:44,540 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-18 13:31:44,614 INFO L227 lantSequenceWeakener]: Weakened 23 states. On average, predicates are now at 84.57% of their original sizes. [2018-11-18 13:31:44,614 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-18 13:31:44,658 INFO L415 sIntCurrentIteration]: We unified 56 AI predicates to 56 [2018-11-18 13:31:44,659 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-18 13:31:44,659 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 13:31:44,659 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-11-18 13:31:44,659 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 13:31:44,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-18 13:31:44,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-18 13:31:44,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-11-18 13:31:44,660 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand 7 states. [2018-11-18 13:31:45,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:31:45,203 INFO L93 Difference]: Finished difference Result 70 states and 88 transitions. [2018-11-18 13:31:45,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-18 13:31:45,204 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 57 [2018-11-18 13:31:45,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:31:45,208 INFO L225 Difference]: With dead ends: 70 [2018-11-18 13:31:45,208 INFO L226 Difference]: Without dead ends: 47 [2018-11-18 13:31:45,209 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 59 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2018-11-18 13:31:45,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-11-18 13:31:45,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2018-11-18 13:31:45,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-11-18 13:31:45,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2018-11-18 13:31:45,216 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 57 [2018-11-18 13:31:45,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:31:45,216 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2018-11-18 13:31:45,216 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-18 13:31:45,216 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2018-11-18 13:31:45,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-11-18 13:31:45,217 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:31:45,218 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:31:45,218 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:31:45,218 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:31:45,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1097185759, now seen corresponding path program 1 times [2018-11-18 13:31:45,218 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 13:31:45,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:31:45,222 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:31:45,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:31:45,222 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 13:31:45,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:31:45,295 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2018-11-18 13:31:45,295 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:31:45,295 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 13:31:45,295 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 58 with the following transitions: [2018-11-18 13:31:45,295 INFO L202 CegarAbsIntRunner]: [0], [1], [5], [7], [9], [11], [15], [18], [26], [28], [31], [32], [39], [43], [46], [48], [53], [55], [62], [63], [64], [68], [71], [73], [75], [79], [80], [81], [82], [84], [85], [86], [87], [88], [89], [90], [91] [2018-11-18 13:31:45,297 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 13:31:45,297 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 13:31:45,343 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-18 13:31:45,343 INFO L272 AbstractInterpreter]: Visited 31 different actions 77 times. Merged at 9 different actions 30 times. Never widened. Performed 293 root evaluator evaluations with a maximum evaluation depth of 3. Performed 293 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 5 fixpoints after 4 different actions. Largest state had 23 variables. [2018-11-18 13:31:45,368 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:31:45,368 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-18 13:31:45,406 INFO L227 lantSequenceWeakener]: Weakened 40 states. On average, predicates are now at 83.29% of their original sizes. [2018-11-18 13:31:45,406 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-18 13:31:45,482 INFO L415 sIntCurrentIteration]: We unified 56 AI predicates to 56 [2018-11-18 13:31:45,482 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-18 13:31:45,482 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-18 13:31:45,482 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [4] total 14 [2018-11-18 13:31:45,482 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 13:31:45,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-18 13:31:45,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-18 13:31:45,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2018-11-18 13:31:45,483 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand 12 states. [2018-11-18 13:31:46,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:31:46,435 INFO L93 Difference]: Finished difference Result 85 states and 104 transitions. [2018-11-18 13:31:46,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-18 13:31:46,435 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 57 [2018-11-18 13:31:46,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:31:46,436 INFO L225 Difference]: With dead ends: 85 [2018-11-18 13:31:46,436 INFO L226 Difference]: Without dead ends: 63 [2018-11-18 13:31:46,436 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 60 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2018-11-18 13:31:46,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-11-18 13:31:46,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 52. [2018-11-18 13:31:46,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-11-18 13:31:46,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 64 transitions. [2018-11-18 13:31:46,447 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 64 transitions. Word has length 57 [2018-11-18 13:31:46,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:31:46,448 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 64 transitions. [2018-11-18 13:31:46,448 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-18 13:31:46,448 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 64 transitions. [2018-11-18 13:31:46,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-11-18 13:31:46,449 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:31:46,449 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:31:46,449 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:31:46,449 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:31:46,449 INFO L82 PathProgramCache]: Analyzing trace with hash -854883758, now seen corresponding path program 1 times [2018-11-18 13:31:46,450 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 13:31:46,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:31:46,450 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:31:46,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:31:46,451 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 13:31:46,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:31:46,507 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2018-11-18 13:31:46,507 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:31:46,507 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 13:31:46,508 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 61 with the following transitions: [2018-11-18 13:31:46,508 INFO L202 CegarAbsIntRunner]: [0], [1], [5], [7], [9], [11], [15], [18], [20], [22], [26], [28], [31], [32], [39], [43], [46], [48], [53], [55], [62], [63], [64], [68], [71], [73], [75], [79], [80], [81], [82], [84], [85], [86], [87], [88], [89], [90], [91] [2018-11-18 13:31:46,509 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 13:31:46,509 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 13:31:46,563 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-18 13:31:46,563 INFO L272 AbstractInterpreter]: Visited 38 different actions 126 times. Merged at 13 different actions 57 times. Never widened. Performed 435 root evaluator evaluations with a maximum evaluation depth of 3. Performed 435 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 10 fixpoints after 7 different actions. Largest state had 25 variables. [2018-11-18 13:31:46,573 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:31:46,573 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-18 13:31:46,602 INFO L227 lantSequenceWeakener]: Weakened 57 states. On average, predicates are now at 81.14% of their original sizes. [2018-11-18 13:31:46,602 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-18 13:31:46,693 INFO L415 sIntCurrentIteration]: We unified 59 AI predicates to 59 [2018-11-18 13:31:46,694 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-18 13:31:46,694 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-18 13:31:46,694 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [14] imperfect sequences [4] total 16 [2018-11-18 13:31:46,694 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 13:31:46,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-18 13:31:46,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-18 13:31:46,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2018-11-18 13:31:46,695 INFO L87 Difference]: Start difference. First operand 52 states and 64 transitions. Second operand 14 states. [2018-11-18 13:31:49,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:31:49,293 INFO L93 Difference]: Finished difference Result 75 states and 90 transitions. [2018-11-18 13:31:49,293 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-18 13:31:49,293 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 60 [2018-11-18 13:31:49,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:31:49,294 INFO L225 Difference]: With dead ends: 75 [2018-11-18 13:31:49,294 INFO L226 Difference]: Without dead ends: 71 [2018-11-18 13:31:49,294 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2018-11-18 13:31:49,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-11-18 13:31:49,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 57. [2018-11-18 13:31:49,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-11-18 13:31:49,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 71 transitions. [2018-11-18 13:31:49,301 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 71 transitions. Word has length 60 [2018-11-18 13:31:49,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:31:49,301 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 71 transitions. [2018-11-18 13:31:49,301 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-18 13:31:49,301 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 71 transitions. [2018-11-18 13:31:49,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-11-18 13:31:49,302 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:31:49,302 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:31:49,303 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:31:49,303 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:31:49,303 INFO L82 PathProgramCache]: Analyzing trace with hash -1548690763, now seen corresponding path program 1 times [2018-11-18 13:31:49,303 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 13:31:49,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:31:49,304 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:31:49,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:31:49,304 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 13:31:49,312 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-18 13:31:49,312 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-18 13:31:49,312 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6547d8b8-79aa-4702-a824-ddda61b6886f/bin-2019/utaipan/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 [2018-11-18 13:31:49,331 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:31:49,331 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-11-18 13:31:49,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:31:49,363 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 62 with the following transitions: [2018-11-18 13:31:49,363 INFO L202 CegarAbsIntRunner]: [0], [1], [5], [7], [9], [11], [15], [18], [26], [28], [31], [32], [39], [43], [46], [48], [51], [53], [55], [61], [62], [63], [64], [68], [71], [73], [75], [79], [80], [81], [82], [84], [85], [86], [87], [88], [89], [90], [91] [2018-11-18 13:31:49,365 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 13:31:49,365 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 13:31:49,622 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-18 13:31:49,623 INFO L272 AbstractInterpreter]: Visited 33 different actions 169 times. Merged at 19 different actions 84 times. Widened at 1 different actions 1 times. Performed 680 root evaluator evaluations with a maximum evaluation depth of 10. Performed 680 inverse root evaluator evaluations with a maximum inverse evaluation depth of 10. Found 21 fixpoints after 10 different actions. Largest state had 23 variables. [2018-11-18 13:31:49,632 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:31:49,632 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-18 13:31:49,660 INFO L227 lantSequenceWeakener]: Weakened 44 states. On average, predicates are now at 86.12% of their original sizes. [2018-11-18 13:31:49,660 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-18 13:31:49,705 INFO L415 sIntCurrentIteration]: We unified 60 AI predicates to 60 [2018-11-18 13:31:49,705 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-18 13:31:49,706 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 13:31:49,706 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-11-18 13:31:49,706 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 13:31:49,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-18 13:31:49,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-18 13:31:49,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2018-11-18 13:31:49,707 INFO L87 Difference]: Start difference. First operand 57 states and 71 transitions. Second operand 8 states. [2018-11-18 13:31:49,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:31:49,814 INFO L93 Difference]: Finished difference Result 85 states and 104 transitions. [2018-11-18 13:31:49,815 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-18 13:31:49,815 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 61 [2018-11-18 13:31:49,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:31:49,816 INFO L225 Difference]: With dead ends: 85 [2018-11-18 13:31:49,816 INFO L226 Difference]: Without dead ends: 61 [2018-11-18 13:31:49,816 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 63 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2018-11-18 13:31:49,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-11-18 13:31:49,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2018-11-18 13:31:49,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-11-18 13:31:49,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 73 transitions. [2018-11-18 13:31:49,823 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 73 transitions. Word has length 61 [2018-11-18 13:31:49,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:31:49,824 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 73 transitions. [2018-11-18 13:31:49,824 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-18 13:31:49,824 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 73 transitions. [2018-11-18 13:31:49,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-11-18 13:31:49,825 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:31:49,825 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:31:49,825 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:31:49,825 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:31:49,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1372432828, now seen corresponding path program 1 times [2018-11-18 13:31:49,825 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 13:31:49,826 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:31:49,826 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:31:49,826 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:31:49,826 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 13:31:49,835 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-18 13:31:49,835 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-18 13:31:49,835 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6547d8b8-79aa-4702-a824-ddda61b6886f/bin-2019/utaipan/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 [2018-11-18 13:31:49,848 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:31:49,848 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-11-18 13:31:49,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:31:49,884 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 65 with the following transitions: [2018-11-18 13:31:49,884 INFO L202 CegarAbsIntRunner]: [0], [1], [5], [7], [9], [11], [15], [18], [20], [22], [26], [28], [31], [32], [39], [43], [46], [48], [51], [53], [55], [61], [62], [63], [64], [68], [71], [73], [75], [79], [80], [81], [82], [84], [85], [86], [87], [88], [89], [90], [91] [2018-11-18 13:31:49,885 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 13:31:49,885 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 13:31:50,277 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-18 13:31:50,278 INFO L272 AbstractInterpreter]: Visited 41 different actions 271 times. Merged at 25 different actions 140 times. Widened at 1 different actions 1 times. Performed 1052 root evaluator evaluations with a maximum evaluation depth of 10. Performed 1052 inverse root evaluator evaluations with a maximum inverse evaluation depth of 10. Found 35 fixpoints after 12 different actions. Largest state had 25 variables. [2018-11-18 13:31:50,304 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:31:50,304 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-18 13:31:50,304 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:31:50,304 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6547d8b8-79aa-4702-a824-ddda61b6886f/bin-2019/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 13:31:50,313 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:31:50,313 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 13:31:50,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:31:50,348 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:31:50,404 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2018-11-18 13:31:50,404 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 13:31:50,523 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2018-11-18 13:31:50,540 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 13:31:50,540 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2018-11-18 13:31:50,540 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 13:31:50,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-18 13:31:50,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-18 13:31:50,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-11-18 13:31:50,542 INFO L87 Difference]: Start difference. First operand 59 states and 73 transitions. Second operand 6 states. [2018-11-18 13:31:50,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:31:50,560 INFO L93 Difference]: Finished difference Result 114 states and 144 transitions. [2018-11-18 13:31:50,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-18 13:31:50,561 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 64 [2018-11-18 13:31:50,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:31:50,562 INFO L225 Difference]: With dead ends: 114 [2018-11-18 13:31:50,562 INFO L226 Difference]: Without dead ends: 68 [2018-11-18 13:31:50,563 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-11-18 13:31:50,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-11-18 13:31:50,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-11-18 13:31:50,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-11-18 13:31:50,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 82 transitions. [2018-11-18 13:31:50,572 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 82 transitions. Word has length 64 [2018-11-18 13:31:50,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:31:50,573 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 82 transitions. [2018-11-18 13:31:50,573 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-18 13:31:50,573 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 82 transitions. [2018-11-18 13:31:50,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-11-18 13:31:50,574 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:31:50,574 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:31:50,574 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:31:50,575 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:31:50,575 INFO L82 PathProgramCache]: Analyzing trace with hash 1035999330, now seen corresponding path program 2 times [2018-11-18 13:31:50,575 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 13:31:50,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:31:50,575 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:31:50,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:31:50,575 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 13:31:50,586 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-18 13:31:50,586 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-18 13:31:50,586 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6547d8b8-79aa-4702-a824-ddda61b6886f/bin-2019/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-11-18 13:31:50,597 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 13:31:50,597 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-11-18 13:31:50,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:31:50,624 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 13:31:50,624 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 13:31:50,624 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:31:50,624 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6547d8b8-79aa-4702-a824-ddda61b6886f/bin-2019/utaipan/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 13:31:50,641 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 13:31:50,641 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-18 13:31:50,671 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-11-18 13:31:50,672 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 13:31:50,674 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:31:50,695 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2018-11-18 13:31:50,695 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 13:31:50,726 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2018-11-18 13:31:50,745 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2018-11-18 13:31:50,745 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2018-11-18 13:31:50,745 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 13:31:50,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-18 13:31:50,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-18 13:31:50,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-11-18 13:31:50,746 INFO L87 Difference]: Start difference. First operand 68 states and 82 transitions. Second operand 4 states. [2018-11-18 13:31:50,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:31:50,756 INFO L93 Difference]: Finished difference Result 114 states and 150 transitions. [2018-11-18 13:31:50,757 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-18 13:31:50,757 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 73 [2018-11-18 13:31:50,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:31:50,758 INFO L225 Difference]: With dead ends: 114 [2018-11-18 13:31:50,758 INFO L226 Difference]: Without dead ends: 72 [2018-11-18 13:31:50,759 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-11-18 13:31:50,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-11-18 13:31:50,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 66. [2018-11-18 13:31:50,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-11-18 13:31:50,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 78 transitions. [2018-11-18 13:31:50,767 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 78 transitions. Word has length 73 [2018-11-18 13:31:50,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:31:50,767 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 78 transitions. [2018-11-18 13:31:50,768 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-18 13:31:50,768 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 78 transitions. [2018-11-18 13:31:50,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-11-18 13:31:50,768 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:31:50,769 INFO L375 BasicCegarLoop]: trace histogram [9, 6, 6, 5, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:31:50,769 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:31:50,769 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:31:50,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1140034890, now seen corresponding path program 1 times [2018-11-18 13:31:50,769 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 13:31:50,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:31:50,770 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 13:31:50,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:31:50,770 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 13:31:50,778 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-18 13:31:50,778 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-18 13:31:50,779 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6547d8b8-79aa-4702-a824-ddda61b6886f/bin-2019/utaipan/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-11-18 13:31:50,789 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:31:50,789 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-11-18 13:31:50,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:31:50,816 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 82 with the following transitions: [2018-11-18 13:31:50,817 INFO L202 CegarAbsIntRunner]: [0], [1], [5], [7], [9], [11], [15], [18], [20], [22], [26], [28], [31], [32], [39], [43], [46], [48], [51], [53], [55], [61], [63], [64], [68], [71], [73], [75], [79], [80], [81], [82], [84], [85], [86], [87], [88], [89], [90], [91] [2018-11-18 13:31:50,818 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 13:31:50,818 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 13:31:51,082 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-18 13:31:51,082 INFO L272 AbstractInterpreter]: Visited 40 different actions 189 times. Merged at 18 different actions 87 times. Never widened. Performed 696 root evaluator evaluations with a maximum evaluation depth of 10. Performed 696 inverse root evaluator evaluations with a maximum inverse evaluation depth of 10. Found 20 fixpoints after 7 different actions. Largest state had 25 variables. [2018-11-18 13:31:51,088 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:31:51,088 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-18 13:31:51,088 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:31:51,088 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6547d8b8-79aa-4702-a824-ddda61b6886f/bin-2019/utaipan/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 13:31:51,099 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:31:51,099 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 13:31:51,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:31:51,133 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:31:51,188 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2018-11-18 13:31:51,188 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 13:31:51,241 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2018-11-18 13:31:51,258 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 13:31:51,258 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2018-11-18 13:31:51,258 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 13:31:51,258 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-18 13:31:51,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-18 13:31:51,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-11-18 13:31:51,259 INFO L87 Difference]: Start difference. First operand 66 states and 78 transitions. Second operand 12 states. [2018-11-18 13:31:51,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:31:51,286 INFO L93 Difference]: Finished difference Result 128 states and 157 transitions. [2018-11-18 13:31:51,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-18 13:31:51,286 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 81 [2018-11-18 13:31:51,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:31:51,287 INFO L225 Difference]: With dead ends: 128 [2018-11-18 13:31:51,287 INFO L226 Difference]: Without dead ends: 84 [2018-11-18 13:31:51,288 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-11-18 13:31:51,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-11-18 13:31:51,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-11-18 13:31:51,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-11-18 13:31:51,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 96 transitions. [2018-11-18 13:31:51,297 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 96 transitions. Word has length 81 [2018-11-18 13:31:51,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:31:51,297 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 96 transitions. [2018-11-18 13:31:51,297 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-18 13:31:51,298 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 96 transitions. [2018-11-18 13:31:51,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-11-18 13:31:51,298 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:31:51,299 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 6, 6, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:31:51,299 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:31:51,299 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:31:51,299 INFO L82 PathProgramCache]: Analyzing trace with hash 424816630, now seen corresponding path program 2 times [2018-11-18 13:31:51,299 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 13:31:51,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:31:51,300 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:31:51,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:31:51,303 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 13:31:51,314 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-18 13:31:51,314 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-18 13:31:51,314 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6547d8b8-79aa-4702-a824-ddda61b6886f/bin-2019/utaipan/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-11-18 13:31:51,333 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 13:31:51,333 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-11-18 13:31:51,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:31:51,364 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 13:31:51,364 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 13:31:51,364 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:31:51,364 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6547d8b8-79aa-4702-a824-ddda61b6886f/bin-2019/utaipan/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 13:31:51,371 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 13:31:51,372 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-18 13:31:51,418 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-11-18 13:31:51,418 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 13:31:51,421 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:31:51,445 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 60 proven. 2 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2018-11-18 13:31:51,445 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 13:31:51,485 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2018-11-18 13:31:51,501 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 13:31:51,501 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2018-11-18 13:31:51,501 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 13:31:51,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-18 13:31:51,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-18 13:31:51,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-11-18 13:31:51,502 INFO L87 Difference]: Start difference. First operand 84 states and 96 transitions. Second operand 6 states. [2018-11-18 13:31:51,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:31:51,517 INFO L93 Difference]: Finished difference Result 126 states and 147 transitions. [2018-11-18 13:31:51,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-18 13:31:51,518 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 99 [2018-11-18 13:31:51,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:31:51,519 INFO L225 Difference]: With dead ends: 126 [2018-11-18 13:31:51,519 INFO L226 Difference]: Without dead ends: 102 [2018-11-18 13:31:51,520 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-11-18 13:31:51,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-11-18 13:31:51,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-11-18 13:31:51,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-11-18 13:31:51,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 114 transitions. [2018-11-18 13:31:51,528 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 114 transitions. Word has length 99 [2018-11-18 13:31:51,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:31:51,529 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 114 transitions. [2018-11-18 13:31:51,529 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-18 13:31:51,529 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 114 transitions. [2018-11-18 13:31:51,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-11-18 13:31:51,529 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:31:51,530 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 6, 6, 5, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:31:51,530 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:31:51,530 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:31:51,530 INFO L82 PathProgramCache]: Analyzing trace with hash 94552847, now seen corresponding path program 3 times [2018-11-18 13:31:51,530 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 13:31:51,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:31:51,530 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 13:31:51,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:31:51,531 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 13:31:51,541 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-18 13:31:51,541 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-18 13:31:51,542 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6547d8b8-79aa-4702-a824-ddda61b6886f/bin-2019/utaipan/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-11-18 13:31:51,561 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 13:31:51,561 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-11-18 13:31:51,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:31:51,593 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 13:31:51,593 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 13:31:51,593 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:31:51,594 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6547d8b8-79aa-4702-a824-ddda61b6886f/bin-2019/utaipan/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 13:31:51,603 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 13:31:51,603 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-18 13:31:51,624 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 13:31:51,624 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 13:31:51,627 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:31:51,648 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 43 proven. 3 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2018-11-18 13:31:51,648 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 13:31:51,698 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 5 proven. 61 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2018-11-18 13:31:51,722 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 13:31:51,722 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2018-11-18 13:31:51,723 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 13:31:51,723 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-18 13:31:51,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-18 13:31:51,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-11-18 13:31:51,723 INFO L87 Difference]: Start difference. First operand 102 states and 114 transitions. Second operand 6 states. [2018-11-18 13:31:51,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:31:51,744 INFO L93 Difference]: Finished difference Result 172 states and 205 transitions. [2018-11-18 13:31:51,745 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-18 13:31:51,746 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 108 [2018-11-18 13:31:51,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:31:51,746 INFO L225 Difference]: With dead ends: 172 [2018-11-18 13:31:51,747 INFO L226 Difference]: Without dead ends: 114 [2018-11-18 13:31:51,747 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-11-18 13:31:51,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-11-18 13:31:51,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2018-11-18 13:31:51,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-11-18 13:31:51,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 126 transitions. [2018-11-18 13:31:51,756 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 126 transitions. Word has length 108 [2018-11-18 13:31:51,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:31:51,757 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 126 transitions. [2018-11-18 13:31:51,757 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-18 13:31:51,757 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 126 transitions. [2018-11-18 13:31:51,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-11-18 13:31:51,758 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:31:51,758 INFO L375 BasicCegarLoop]: trace histogram [18, 15, 15, 12, 11, 10, 10, 5, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:31:51,759 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:31:51,759 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:31:51,759 INFO L82 PathProgramCache]: Analyzing trace with hash 1994391674, now seen corresponding path program 4 times [2018-11-18 13:31:51,759 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 13:31:51,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:31:51,759 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 13:31:51,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:31:51,760 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 13:31:51,770 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-18 13:31:51,770 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-18 13:31:51,770 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6547d8b8-79aa-4702-a824-ddda61b6886f/bin-2019/utaipan/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-11-18 13:31:51,790 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:31:51,790 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-11-18 13:31:51,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:31:51,824 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 13:31:51,824 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 13:31:51,824 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:31:51,824 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6547d8b8-79aa-4702-a824-ddda61b6886f/bin-2019/utaipan/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 13:31:51,832 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:31:51,832 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 13:31:51,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:31:51,862 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:31:51,967 INFO L134 CoverageAnalysis]: Checked inductivity of 709 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 554 trivial. 0 not checked. [2018-11-18 13:31:51,967 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 13:31:52,094 INFO L134 CoverageAnalysis]: Checked inductivity of 709 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 554 trivial. 0 not checked. [2018-11-18 13:31:52,110 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 13:31:52,110 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2018-11-18 13:31:52,110 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 13:31:52,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-11-18 13:31:52,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-11-18 13:31:52,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-11-18 13:31:52,111 INFO L87 Difference]: Start difference. First operand 114 states and 126 transitions. Second operand 22 states. [2018-11-18 13:31:52,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:31:52,173 INFO L93 Difference]: Finished difference Result 218 states and 251 transitions. [2018-11-18 13:31:52,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-11-18 13:31:52,173 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 144 [2018-11-18 13:31:52,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:31:52,174 INFO L225 Difference]: With dead ends: 218 [2018-11-18 13:31:52,174 INFO L226 Difference]: Without dead ends: 144 [2018-11-18 13:31:52,175 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 265 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-11-18 13:31:52,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2018-11-18 13:31:52,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2018-11-18 13:31:52,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2018-11-18 13:31:52,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 156 transitions. [2018-11-18 13:31:52,189 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 156 transitions. Word has length 144 [2018-11-18 13:31:52,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:31:52,189 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 156 transitions. [2018-11-18 13:31:52,189 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-11-18 13:31:52,190 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 156 transitions. [2018-11-18 13:31:52,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-11-18 13:31:52,190 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:31:52,191 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 20, 18, 15, 15, 12, 5, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:31:52,191 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:31:52,191 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:31:52,191 INFO L82 PathProgramCache]: Analyzing trace with hash -938416198, now seen corresponding path program 5 times [2018-11-18 13:31:52,191 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 13:31:52,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:31:52,192 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:31:52,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:31:52,192 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 13:31:52,205 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-18 13:31:52,205 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-18 13:31:52,205 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6547d8b8-79aa-4702-a824-ddda61b6886f/bin-2019/utaipan/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-11-18 13:31:52,219 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 13:31:52,219 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-11-18 13:31:52,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:31:52,257 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 13:31:52,257 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 13:31:52,257 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:31:52,257 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6547d8b8-79aa-4702-a824-ddda61b6886f/bin-2019/utaipan/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 13:31:52,263 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 13:31:52,263 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-18 13:31:52,282 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-11-18 13:31:52,283 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 13:31:52,285 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:31:52,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1164 backedges. 110 proven. 3 refuted. 0 times theorem prover too weak. 1051 trivial. 0 not checked. [2018-11-18 13:31:52,310 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 13:31:52,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1164 backedges. 110 proven. 3 refuted. 0 times theorem prover too weak. 1051 trivial. 0 not checked. [2018-11-18 13:31:52,359 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 13:31:52,359 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2018-11-18 13:31:52,360 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 13:31:52,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-18 13:31:52,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-18 13:31:52,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-11-18 13:31:52,360 INFO L87 Difference]: Start difference. First operand 144 states and 156 transitions. Second operand 8 states. [2018-11-18 13:31:52,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:31:52,391 INFO L93 Difference]: Finished difference Result 230 states and 268 transitions. [2018-11-18 13:31:52,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-18 13:31:52,392 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 174 [2018-11-18 13:31:52,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:31:52,393 INFO L225 Difference]: With dead ends: 230 [2018-11-18 13:31:52,393 INFO L226 Difference]: Without dead ends: 160 [2018-11-18 13:31:52,394 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-11-18 13:31:52,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2018-11-18 13:31:52,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2018-11-18 13:31:52,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-11-18 13:31:52,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 176 transitions. [2018-11-18 13:31:52,406 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 176 transitions. Word has length 174 [2018-11-18 13:31:52,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:31:52,407 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 176 transitions. [2018-11-18 13:31:52,407 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-18 13:31:52,407 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 176 transitions. [2018-11-18 13:31:52,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2018-11-18 13:31:52,408 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:31:52,408 INFO L375 BasicCegarLoop]: trace histogram [30, 27, 27, 21, 20, 20, 15, 12, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:31:52,408 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:31:52,408 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:31:52,409 INFO L82 PathProgramCache]: Analyzing trace with hash -765799018, now seen corresponding path program 6 times [2018-11-18 13:31:52,409 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 13:31:52,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:31:52,409 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 13:31:52,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:31:52,409 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 13:31:52,423 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-18 13:31:52,424 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-18 13:31:52,424 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6547d8b8-79aa-4702-a824-ddda61b6886f/bin-2019/utaipan/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-11-18 13:31:52,438 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 13:31:52,439 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-11-18 13:31:52,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:31:52,490 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 13:31:52,490 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 13:31:52,490 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:31:52,491 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6547d8b8-79aa-4702-a824-ddda61b6886f/bin-2019/utaipan/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 13:31:52,498 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 13:31:52,499 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-18 13:31:52,525 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 13:31:52,525 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 13:31:52,527 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:31:52,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2220 backedges. 454 proven. 36 refuted. 0 times theorem prover too weak. 1730 trivial. 0 not checked. [2018-11-18 13:31:52,557 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 13:31:52,614 INFO L134 CoverageAnalysis]: Checked inductivity of 2220 backedges. 90 proven. 766 refuted. 0 times theorem prover too weak. 1364 trivial. 0 not checked. [2018-11-18 13:31:52,629 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 13:31:52,629 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2018-11-18 13:31:52,629 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 13:31:52,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-18 13:31:52,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-18 13:31:52,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-11-18 13:31:52,630 INFO L87 Difference]: Start difference. First operand 160 states and 176 transitions. Second operand 12 states. [2018-11-18 13:31:52,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:31:52,681 INFO L93 Difference]: Finished difference Result 270 states and 314 transitions. [2018-11-18 13:31:52,682 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-18 13:31:52,682 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 222 [2018-11-18 13:31:52,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:31:52,683 INFO L225 Difference]: With dead ends: 270 [2018-11-18 13:31:52,683 INFO L226 Difference]: Without dead ends: 184 [2018-11-18 13:31:52,684 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 433 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-11-18 13:31:52,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2018-11-18 13:31:52,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2018-11-18 13:31:52,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2018-11-18 13:31:52,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 200 transitions. [2018-11-18 13:31:52,694 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 200 transitions. Word has length 222 [2018-11-18 13:31:52,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:31:52,694 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 200 transitions. [2018-11-18 13:31:52,694 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-18 13:31:52,694 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 200 transitions. [2018-11-18 13:31:52,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2018-11-18 13:31:52,696 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:31:52,696 INFO L375 BasicCegarLoop]: trace histogram [48, 45, 45, 30, 21, 20, 20, 15, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:31:52,696 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:31:52,696 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:31:52,696 INFO L82 PathProgramCache]: Analyzing trace with hash -190377492, now seen corresponding path program 7 times [2018-11-18 13:31:52,696 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 13:31:52,697 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:31:52,697 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 13:31:52,697 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:31:52,697 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 13:31:52,711 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-18 13:31:52,711 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-18 13:31:52,712 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6547d8b8-79aa-4702-a824-ddda61b6886f/bin-2019/utaipan/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-11-18 13:31:52,723 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:31:52,723 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-11-18 13:31:52,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:31:52,779 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 13:31:52,779 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 13:31:52,779 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:31:52,779 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6547d8b8-79aa-4702-a824-ddda61b6886f/bin-2019/utaipan/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 13:31:52,786 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:31:52,786 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 13:31:52,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:31:52,850 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:31:52,977 INFO L134 CoverageAnalysis]: Checked inductivity of 4884 backedges. 1540 proven. 210 refuted. 0 times theorem prover too weak. 3134 trivial. 0 not checked. [2018-11-18 13:31:52,977 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 13:31:53,056 INFO L134 CoverageAnalysis]: Checked inductivity of 4884 backedges. 204 proven. 2140 refuted. 0 times theorem prover too weak. 2540 trivial. 0 not checked. [2018-11-18 13:31:53,072 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 13:31:53,072 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-11-18 13:31:53,072 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 13:31:53,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-18 13:31:53,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-18 13:31:53,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-11-18 13:31:53,073 INFO L87 Difference]: Start difference. First operand 184 states and 200 transitions. Second operand 13 states. [2018-11-18 13:31:53,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:31:53,119 INFO L93 Difference]: Finished difference Result 298 states and 337 transitions. [2018-11-18 13:31:53,121 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-18 13:31:53,121 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 294 [2018-11-18 13:31:53,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:31:53,122 INFO L225 Difference]: With dead ends: 298 [2018-11-18 13:31:53,122 INFO L226 Difference]: Without dead ends: 188 [2018-11-18 13:31:53,123 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 587 GetRequests, 566 SyntacticMatches, 10 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-11-18 13:31:53,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2018-11-18 13:31:53,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2018-11-18 13:31:53,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2018-11-18 13:31:53,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 204 transitions. [2018-11-18 13:31:53,130 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 204 transitions. Word has length 294 [2018-11-18 13:31:53,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:31:53,130 INFO L480 AbstractCegarLoop]: Abstraction has 188 states and 204 transitions. [2018-11-18 13:31:53,130 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-18 13:31:53,131 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 204 transitions. [2018-11-18 13:31:53,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2018-11-18 13:31:53,132 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:31:53,132 INFO L375 BasicCegarLoop]: trace histogram [51, 48, 48, 33, 21, 20, 20, 15, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:31:53,133 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:31:53,133 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:31:53,133 INFO L82 PathProgramCache]: Analyzing trace with hash 348149861, now seen corresponding path program 8 times [2018-11-18 13:31:53,133 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 13:31:53,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:31:53,133 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:31:53,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:31:53,134 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 13:31:53,148 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-18 13:31:53,148 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-18 13:31:53,148 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6547d8b8-79aa-4702-a824-ddda61b6886f/bin-2019/utaipan/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-11-18 13:31:53,165 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 13:31:53,165 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-11-18 13:31:53,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:31:53,212 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 13:31:53,212 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 13:31:53,212 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:31:53,212 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6547d8b8-79aa-4702-a824-ddda61b6886f/bin-2019/utaipan/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 13:31:53,223 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 13:31:53,223 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-18 13:31:54,232 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-11-18 13:31:54,232 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 13:31:54,235 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:31:54,284 INFO L134 CoverageAnalysis]: Checked inductivity of 5454 backedges. 2188 proven. 26 refuted. 0 times theorem prover too weak. 3240 trivial. 0 not checked. [2018-11-18 13:31:54,284 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 13:31:54,336 INFO L134 CoverageAnalysis]: Checked inductivity of 5454 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 5428 trivial. 0 not checked. [2018-11-18 13:31:54,351 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 13:31:54,351 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2018-11-18 13:31:54,351 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 13:31:54,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-18 13:31:54,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-18 13:31:54,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-11-18 13:31:54,352 INFO L87 Difference]: Start difference. First operand 188 states and 204 transitions. Second operand 12 states. [2018-11-18 13:31:54,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:31:54,398 INFO L93 Difference]: Finished difference Result 304 states and 339 transitions. [2018-11-18 13:31:54,398 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-18 13:31:54,398 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 306 [2018-11-18 13:31:54,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:31:54,399 INFO L225 Difference]: With dead ends: 304 [2018-11-18 13:31:54,399 INFO L226 Difference]: Without dead ends: 224 [2018-11-18 13:31:54,400 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 611 GetRequests, 601 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-11-18 13:31:54,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2018-11-18 13:31:54,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 224. [2018-11-18 13:31:54,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2018-11-18 13:31:54,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 240 transitions. [2018-11-18 13:31:54,412 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 240 transitions. Word has length 306 [2018-11-18 13:31:54,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:31:54,413 INFO L480 AbstractCegarLoop]: Abstraction has 224 states and 240 transitions. [2018-11-18 13:31:54,413 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-18 13:31:54,413 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 240 transitions. [2018-11-18 13:31:54,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2018-11-18 13:31:54,415 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:31:54,415 INFO L375 BasicCegarLoop]: trace histogram [51, 48, 48, 33, 21, 20, 20, 15, 11, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:31:54,415 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:31:54,415 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:31:54,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1924058437, now seen corresponding path program 9 times [2018-11-18 13:31:54,415 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 13:31:54,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:31:54,416 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 13:31:54,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:31:54,416 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 13:31:54,431 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-18 13:31:54,431 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-18 13:31:54,432 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6547d8b8-79aa-4702-a824-ddda61b6886f/bin-2019/utaipan/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-11-18 13:31:54,443 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 13:31:54,443 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-11-18 13:31:54,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:31:54,517 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 13:31:54,517 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 13:31:54,517 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:31:54,517 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6547d8b8-79aa-4702-a824-ddda61b6886f/bin-2019/utaipan/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 13:31:54,530 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 13:31:54,531 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-18 13:31:54,602 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 13:31:54,602 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 13:31:54,607 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:31:54,775 INFO L134 CoverageAnalysis]: Checked inductivity of 5583 backedges. 2182 proven. 512 refuted. 0 times theorem prover too weak. 2889 trivial. 0 not checked. [2018-11-18 13:31:54,776 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 13:31:55,003 INFO L134 CoverageAnalysis]: Checked inductivity of 5583 backedges. 0 proven. 2698 refuted. 0 times theorem prover too weak. 2885 trivial. 0 not checked. [2018-11-18 13:31:55,023 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 13:31:55,023 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 22 [2018-11-18 13:31:55,023 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 13:31:55,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-11-18 13:31:55,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-11-18 13:31:55,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-11-18 13:31:55,025 INFO L87 Difference]: Start difference. First operand 224 states and 240 transitions. Second operand 22 states. [2018-11-18 13:31:55,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:31:55,089 INFO L93 Difference]: Finished difference Result 390 states and 436 transitions. [2018-11-18 13:31:55,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-11-18 13:31:55,089 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 324 [2018-11-18 13:31:55,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:31:55,091 INFO L225 Difference]: With dead ends: 390 [2018-11-18 13:31:55,091 INFO L226 Difference]: Without dead ends: 240 [2018-11-18 13:31:55,092 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 647 GetRequests, 613 SyntacticMatches, 14 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-11-18 13:31:55,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2018-11-18 13:31:55,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 240. [2018-11-18 13:31:55,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2018-11-18 13:31:55,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 260 transitions. [2018-11-18 13:31:55,103 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 260 transitions. Word has length 324 [2018-11-18 13:31:55,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:31:55,103 INFO L480 AbstractCegarLoop]: Abstraction has 240 states and 260 transitions. [2018-11-18 13:31:55,104 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-11-18 13:31:55,104 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 260 transitions. [2018-11-18 13:31:55,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 373 [2018-11-18 13:31:55,106 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:31:55,106 INFO L375 BasicCegarLoop]: trace histogram [63, 60, 60, 33, 27, 21, 20, 20, 11, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:31:55,106 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:31:55,106 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:31:55,106 INFO L82 PathProgramCache]: Analyzing trace with hash 1265522465, now seen corresponding path program 10 times [2018-11-18 13:31:55,106 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 13:31:55,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:31:55,107 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 13:31:55,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:31:55,107 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 13:31:55,122 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-18 13:31:55,122 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-18 13:31:55,122 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6547d8b8-79aa-4702-a824-ddda61b6886f/bin-2019/utaipan/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-11-18 13:31:55,139 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:31:55,140 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-11-18 13:31:55,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:31:55,196 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 13:31:55,196 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 13:31:55,196 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:31:55,197 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6547d8b8-79aa-4702-a824-ddda61b6886f/bin-2019/utaipan/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 13:31:55,204 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:31:55,204 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 13:31:55,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:31:55,279 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:31:55,375 INFO L134 CoverageAnalysis]: Checked inductivity of 8223 backedges. 3372 proven. 155 refuted. 0 times theorem prover too weak. 4696 trivial. 0 not checked. [2018-11-18 13:31:55,375 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 13:31:55,543 INFO L134 CoverageAnalysis]: Checked inductivity of 8223 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 8068 trivial. 0 not checked. [2018-11-18 13:31:55,559 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 13:31:55,559 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2018-11-18 13:31:55,559 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 13:31:55,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-18 13:31:55,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-18 13:31:55,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-11-18 13:31:55,560 INFO L87 Difference]: Start difference. First operand 240 states and 260 transitions. Second operand 21 states. [2018-11-18 13:31:55,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:31:55,603 INFO L93 Difference]: Finished difference Result 390 states and 439 transitions. [2018-11-18 13:31:55,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-11-18 13:31:55,603 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 372 [2018-11-18 13:31:55,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:31:55,605 INFO L225 Difference]: With dead ends: 390 [2018-11-18 13:31:55,605 INFO L226 Difference]: Without dead ends: 294 [2018-11-18 13:31:55,606 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 743 GetRequests, 721 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-11-18 13:31:55,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2018-11-18 13:31:55,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 294. [2018-11-18 13:31:55,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2018-11-18 13:31:55,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 314 transitions. [2018-11-18 13:31:55,619 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 314 transitions. Word has length 372 [2018-11-18 13:31:55,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:31:55,620 INFO L480 AbstractCegarLoop]: Abstraction has 294 states and 314 transitions. [2018-11-18 13:31:55,620 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-18 13:31:55,620 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 314 transitions. [2018-11-18 13:31:55,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 400 [2018-11-18 13:31:55,622 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:31:55,622 INFO L375 BasicCegarLoop]: trace histogram [63, 60, 60, 33, 27, 21, 20, 20, 20, 19, 19, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:31:55,622 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:31:55,623 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:31:55,623 INFO L82 PathProgramCache]: Analyzing trace with hash -274838592, now seen corresponding path program 11 times [2018-11-18 13:31:55,623 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 13:31:55,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:31:55,623 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:31:55,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:31:55,624 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 13:31:55,637 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-18 13:31:55,637 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-18 13:31:55,637 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6547d8b8-79aa-4702-a824-ddda61b6886f/bin-2019/utaipan/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-11-18 13:31:55,657 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 13:31:55,658 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-11-18 13:31:56,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 13:31:58,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2018-11-18 13:31:58,922 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-11-18 13:31:58,922 FATAL L292 ToolchainWalker]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: program execution has not yet been computed at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheck.getRcfgProgramExecution(TraceCheck.java:440) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheck.computeRcfgProgramExecutionAndDecodeBranches(TraceCheck.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheck.(TraceCheck.java:227) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheck.(TraceCheck.java:178) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheck.(TraceCheck.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructDefault(TraceCheckConstructor.java:201) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructTraceCheck(TraceCheckConstructor.java:178) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.get(TraceCheckConstructor.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseTaipanRefinementStrategy.getTraceCheck(BaseTaipanRefinementStrategy.java:214) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.checkFeasibility(BaseRefinementStrategy.java:223) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.executeStrategy(BaseRefinementStrategy.java:197) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:70) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:429) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:434) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:376) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:312) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:123) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2018-11-18 13:31:58,925 INFO L168 Benchmark]: Toolchain (without parser) took 16396.30 ms. Allocated memory was 1.0 GB in the beginning and 1.6 GB in the end (delta: 529.0 MB). Free memory was 959.1 MB in the beginning and 1.4 GB in the end (delta: -403.1 MB). Peak memory consumption was 125.9 MB. Max. memory is 11.5 GB. [2018-11-18 13:31:58,926 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 13:31:58,926 INFO L168 Benchmark]: CACSL2BoogieTranslator took 162.12 ms. Allocated memory is still 1.0 GB. Free memory was 959.1 MB in the beginning and 948.2 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 11.5 GB. [2018-11-18 13:31:58,927 INFO L168 Benchmark]: Boogie Procedure Inliner took 16.45 ms. Allocated memory is still 1.0 GB. Free memory was 948.2 MB in the beginning and 945.5 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-18 13:31:58,927 INFO L168 Benchmark]: Boogie Preprocessor took 64.66 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 149.4 MB). Free memory was 945.5 MB in the beginning and 1.1 GB in the end (delta: -198.4 MB). Peak memory consumption was 14.4 MB. Max. memory is 11.5 GB. [2018-11-18 13:31:58,927 INFO L168 Benchmark]: RCFGBuilder took 251.08 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 11.5 GB. [2018-11-18 13:31:58,928 INFO L168 Benchmark]: TraceAbstraction took 15899.35 ms. Allocated memory was 1.2 GB in the beginning and 1.6 GB in the end (delta: 379.6 MB). Free memory was 1.1 GB in the beginning and 1.4 GB in the end (delta: -236.7 MB). Peak memory consumption was 142.9 MB. Max. memory is 11.5 GB. [2018-11-18 13:31:58,930 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 162.12 ms. Allocated memory is still 1.0 GB. Free memory was 959.1 MB in the beginning and 948.2 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 16.45 ms. Allocated memory is still 1.0 GB. Free memory was 948.2 MB in the beginning and 945.5 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 64.66 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 149.4 MB). Free memory was 945.5 MB in the beginning and 1.1 GB in the end (delta: -198.4 MB). Peak memory consumption was 14.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 251.08 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 15899.35 ms. Allocated memory was 1.2 GB in the beginning and 1.6 GB in the end (delta: 379.6 MB). Free memory was 1.1 GB in the beginning and 1.4 GB in the end (delta: -236.7 MB). Peak memory consumption was 142.9 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: program execution has not yet been computed de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: program execution has not yet been computed: de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheck.getRcfgProgramExecution(TraceCheck.java:440) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.23-5842f4b [2018-11-18 13:32:00,410 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-18 13:32:00,411 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-18 13:32:00,419 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-18 13:32:00,420 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-18 13:32:00,420 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-18 13:32:00,421 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-18 13:32:00,422 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-18 13:32:00,423 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-18 13:32:00,424 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-18 13:32:00,425 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-18 13:32:00,425 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-18 13:32:00,426 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-18 13:32:00,426 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-18 13:32:00,427 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-18 13:32:00,428 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-18 13:32:00,429 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-18 13:32:00,430 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-18 13:32:00,432 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-18 13:32:00,433 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-18 13:32:00,434 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-18 13:32:00,434 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-18 13:32:00,436 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-18 13:32:00,436 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-18 13:32:00,437 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-18 13:32:00,437 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-18 13:32:00,438 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-18 13:32:00,438 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-18 13:32:00,439 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-18 13:32:00,440 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-18 13:32:00,440 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-18 13:32:00,441 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-18 13:32:00,441 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-18 13:32:00,441 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-18 13:32:00,442 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-18 13:32:00,442 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-18 13:32:00,443 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_6547d8b8-79aa-4702-a824-ddda61b6886f/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2018-11-18 13:32:00,453 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-18 13:32:00,454 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-18 13:32:00,454 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-18 13:32:00,454 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-18 13:32:00,454 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-18 13:32:00,455 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-18 13:32:00,455 INFO L133 SettingsManager]: * Explicit value domain=true [2018-11-18 13:32:00,455 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-18 13:32:00,455 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-18 13:32:00,455 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-18 13:32:00,456 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-18 13:32:00,457 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-18 13:32:00,457 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-18 13:32:00,457 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-18 13:32:00,457 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-18 13:32:00,457 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-18 13:32:00,457 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-18 13:32:00,457 INFO L133 SettingsManager]: * Use bitvectors instead of ints=true [2018-11-18 13:32:00,457 INFO L133 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2018-11-18 13:32:00,458 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-18 13:32:00,458 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-18 13:32:00,458 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-18 13:32:00,458 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-18 13:32:00,458 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-18 13:32:00,458 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-18 13:32:00,458 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-18 13:32:00,458 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-18 13:32:00,458 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 13:32:00,458 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-18 13:32:00,459 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-18 13:32:00,459 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-18 13:32:00,459 INFO L133 SettingsManager]: * Trace refinement strategy=WALRUS [2018-11-18 13:32:00,459 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-18 13:32:00,459 INFO L133 SettingsManager]: * Command for external solver=cvc4nyu --tear-down-incremental --rewrite-divk --print-success --lang smt [2018-11-18 13:32:00,459 INFO L133 SettingsManager]: * Logic for external solver=AUFBV [2018-11-18 13:32:00,459 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/working_dir_6547d8b8-79aa-4702-a824-ddda61b6886f/bin-2019/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d02e722fa6530375aea2bbc43a68e422ad66c6f3 [2018-11-18 13:32:00,487 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-18 13:32:00,495 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-18 13:32:00,497 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-18 13:32:00,498 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-18 13:32:00,498 INFO L276 PluginConnector]: CDTParser initialized [2018-11-18 13:32:00,499 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_6547d8b8-79aa-4702-a824-ddda61b6886f/bin-2019/utaipan/../../sv-benchmarks/c/reducercommutativity/rangesum20_false-unreach-call.i [2018-11-18 13:32:00,534 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_6547d8b8-79aa-4702-a824-ddda61b6886f/bin-2019/utaipan/data/7710dbf7c/88407606ad364206a57ad85650437351/FLAG3baa2d9a6 [2018-11-18 13:32:00,937 INFO L307 CDTParser]: Found 1 translation units. [2018-11-18 13:32:00,938 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_6547d8b8-79aa-4702-a824-ddda61b6886f/sv-benchmarks/c/reducercommutativity/rangesum20_false-unreach-call.i [2018-11-18 13:32:00,942 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_6547d8b8-79aa-4702-a824-ddda61b6886f/bin-2019/utaipan/data/7710dbf7c/88407606ad364206a57ad85650437351/FLAG3baa2d9a6 [2018-11-18 13:32:00,950 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_6547d8b8-79aa-4702-a824-ddda61b6886f/bin-2019/utaipan/data/7710dbf7c/88407606ad364206a57ad85650437351 [2018-11-18 13:32:00,952 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-18 13:32:00,953 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-18 13:32:00,953 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-18 13:32:00,954 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-18 13:32:00,957 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-18 13:32:00,957 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 01:32:00" (1/1) ... [2018-11-18 13:32:00,959 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3270a5fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:32:00, skipping insertion in model container [2018-11-18 13:32:00,960 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 01:32:00" (1/1) ... [2018-11-18 13:32:00,968 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-18 13:32:00,986 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-18 13:32:01,128 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 13:32:01,136 INFO L191 MainTranslator]: Completed pre-run [2018-11-18 13:32:01,151 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 13:32:01,160 INFO L195 MainTranslator]: Completed translation [2018-11-18 13:32:01,160 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:32:01 WrapperNode [2018-11-18 13:32:01,160 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-18 13:32:01,161 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-18 13:32:01,161 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-18 13:32:01,161 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-18 13:32:01,166 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:32:01" (1/1) ... [2018-11-18 13:32:01,172 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:32:01" (1/1) ... [2018-11-18 13:32:01,176 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-18 13:32:01,176 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-18 13:32:01,176 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-18 13:32:01,177 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-18 13:32:01,182 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:32:01" (1/1) ... [2018-11-18 13:32:01,182 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:32:01" (1/1) ... [2018-11-18 13:32:01,184 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:32:01" (1/1) ... [2018-11-18 13:32:01,184 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:32:01" (1/1) ... [2018-11-18 13:32:01,190 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:32:01" (1/1) ... [2018-11-18 13:32:01,193 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:32:01" (1/1) ... [2018-11-18 13:32:01,194 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:32:01" (1/1) ... [2018-11-18 13:32:01,196 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-18 13:32:01,196 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-18 13:32:01,197 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-18 13:32:01,197 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-18 13:32:01,197 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:32:01" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6547d8b8-79aa-4702-a824-ddda61b6886f/bin-2019/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 13:32:01,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-18 13:32:01,276 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-18 13:32:01,276 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-11-18 13:32:01,276 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2018-11-18 13:32:01,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-18 13:32:01,277 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-18 13:32:01,277 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-18 13:32:01,277 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-18 13:32:01,277 INFO L130 BoogieDeclarations]: Found specification of procedure rangesum [2018-11-18 13:32:01,277 INFO L138 BoogieDeclarations]: Found implementation of procedure rangesum [2018-11-18 13:32:01,277 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-11-18 13:32:01,277 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2018-11-18 13:32:01,277 INFO L130 BoogieDeclarations]: Found specification of procedure init_nondet [2018-11-18 13:32:01,278 INFO L138 BoogieDeclarations]: Found implementation of procedure init_nondet [2018-11-18 13:32:01,795 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-18 13:32:01,795 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 01:32:01 BoogieIcfgContainer [2018-11-18 13:32:01,795 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-18 13:32:01,796 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-18 13:32:01,796 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-18 13:32:01,798 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-18 13:32:01,798 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 01:32:00" (1/3) ... [2018-11-18 13:32:01,799 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fbe4f1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 01:32:01, skipping insertion in model container [2018-11-18 13:32:01,799 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:32:01" (2/3) ... [2018-11-18 13:32:01,799 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fbe4f1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 01:32:01, skipping insertion in model container [2018-11-18 13:32:01,799 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 01:32:01" (3/3) ... [2018-11-18 13:32:01,801 INFO L112 eAbstractionObserver]: Analyzing ICFG rangesum20_false-unreach-call.i [2018-11-18 13:32:01,807 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-18 13:32:01,812 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-18 13:32:01,824 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-18 13:32:01,845 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-18 13:32:01,845 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-18 13:32:01,846 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-18 13:32:01,846 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-18 13:32:01,846 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-18 13:32:01,846 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-18 13:32:01,846 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-18 13:32:01,846 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-18 13:32:01,846 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-18 13:32:01,859 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2018-11-18 13:32:01,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-11-18 13:32:01,863 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:32:01,864 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:32:01,865 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:32:01,868 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:32:01,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1049289672, now seen corresponding path program 1 times [2018-11-18 13:32:01,871 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-18 13:32:01,871 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6547d8b8-79aa-4702-a824-ddda61b6886f/bin-2019/utaipan/cvc4nyu Starting monitored process 2 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-18 13:32:01,884 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:32:01,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:32:01,938 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:32:01,955 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-18 13:32:01,955 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-18 13:32:01,959 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 13:32:01,959 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-18 13:32:01,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-18 13:32:01,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-18 13:32:01,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-18 13:32:01,971 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 2 states. [2018-11-18 13:32:01,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:32:01,988 INFO L93 Difference]: Finished difference Result 69 states and 90 transitions. [2018-11-18 13:32:01,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-18 13:32:01,989 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 37 [2018-11-18 13:32:01,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:32:01,995 INFO L225 Difference]: With dead ends: 69 [2018-11-18 13:32:01,995 INFO L226 Difference]: Without dead ends: 35 [2018-11-18 13:32:01,997 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-18 13:32:02,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-11-18 13:32:02,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-11-18 13:32:02,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-11-18 13:32:02,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2018-11-18 13:32:02,024 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 37 [2018-11-18 13:32:02,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:32:02,025 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2018-11-18 13:32:02,025 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-18 13:32:02,025 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2018-11-18 13:32:02,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-11-18 13:32:02,027 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:32:02,027 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:32:02,027 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:32:02,028 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:32:02,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1338067039, now seen corresponding path program 1 times [2018-11-18 13:32:02,029 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-18 13:32:02,029 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6547d8b8-79aa-4702-a824-ddda61b6886f/bin-2019/utaipan/cvc4nyu Starting monitored process 3 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-18 13:32:02,054 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:32:02,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:32:02,093 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:32:02,107 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-11-18 13:32:02,107 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-18 13:32:02,110 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 13:32:02,110 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-18 13:32:02,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-18 13:32:02,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-18 13:32:02,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-18 13:32:02,112 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand 3 states. [2018-11-18 13:32:02,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:32:02,215 INFO L93 Difference]: Finished difference Result 62 states and 80 transitions. [2018-11-18 13:32:02,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-18 13:32:02,215 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 42 [2018-11-18 13:32:02,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:32:02,217 INFO L225 Difference]: With dead ends: 62 [2018-11-18 13:32:02,217 INFO L226 Difference]: Without dead ends: 42 [2018-11-18 13:32:02,218 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-18 13:32:02,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-11-18 13:32:02,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2018-11-18 13:32:02,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-11-18 13:32:02,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2018-11-18 13:32:02,224 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 42 [2018-11-18 13:32:02,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:32:02,224 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2018-11-18 13:32:02,224 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-18 13:32:02,224 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2018-11-18 13:32:02,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-11-18 13:32:02,225 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:32:02,225 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:32:02,226 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:32:02,226 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:32:02,226 INFO L82 PathProgramCache]: Analyzing trace with hash 642796544, now seen corresponding path program 1 times [2018-11-18 13:32:02,226 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-18 13:32:02,226 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6547d8b8-79aa-4702-a824-ddda61b6886f/bin-2019/utaipan/cvc4nyu Starting monitored process 4 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-18 13:32:02,238 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:32:02,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:32:02,276 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:32:02,287 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-11-18 13:32:02,287 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-18 13:32:02,289 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 13:32:02,289 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-18 13:32:02,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-18 13:32:02,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-18 13:32:02,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-18 13:32:02,290 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand 3 states. [2018-11-18 13:32:02,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:32:02,304 INFO L93 Difference]: Finished difference Result 72 states and 88 transitions. [2018-11-18 13:32:02,304 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-18 13:32:02,305 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 42 [2018-11-18 13:32:02,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:32:02,305 INFO L225 Difference]: With dead ends: 72 [2018-11-18 13:32:02,305 INFO L226 Difference]: Without dead ends: 43 [2018-11-18 13:32:02,306 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-18 13:32:02,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-11-18 13:32:02,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2018-11-18 13:32:02,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-11-18 13:32:02,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2018-11-18 13:32:02,312 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 42 [2018-11-18 13:32:02,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:32:02,312 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2018-11-18 13:32:02,312 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-18 13:32:02,312 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2018-11-18 13:32:02,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-11-18 13:32:02,313 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:32:02,313 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:32:02,314 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:32:02,314 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:32:02,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1732845926, now seen corresponding path program 1 times [2018-11-18 13:32:02,314 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-18 13:32:02,315 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6547d8b8-79aa-4702-a824-ddda61b6886f/bin-2019/utaipan/cvc4nyu Starting monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-18 13:32:02,330 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:32:02,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:32:02,381 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:32:02,395 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-11-18 13:32:02,395 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 13:32:02,447 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-11-18 13:32:02,452 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:32:02,452 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6547d8b8-79aa-4702-a824-ddda61b6886f/bin-2019/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 13:32:02,459 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:32:02,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:32:02,482 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:32:02,619 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-11-18 13:32:02,620 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-18 13:32:02,635 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-11-18 13:32:02,635 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [4, 4] total 13 [2018-11-18 13:32:02,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-18 13:32:02,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-18 13:32:02,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2018-11-18 13:32:02,636 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand 13 states. [2018-11-18 13:32:02,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:32:02,863 INFO L93 Difference]: Finished difference Result 106 states and 132 transitions. [2018-11-18 13:32:02,863 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-18 13:32:02,863 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 45 [2018-11-18 13:32:02,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:32:02,865 INFO L225 Difference]: With dead ends: 106 [2018-11-18 13:32:02,865 INFO L226 Difference]: Without dead ends: 75 [2018-11-18 13:32:02,865 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2018-11-18 13:32:02,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-11-18 13:32:02,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 61. [2018-11-18 13:32:02,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-11-18 13:32:02,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 75 transitions. [2018-11-18 13:32:02,876 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 75 transitions. Word has length 45 [2018-11-18 13:32:02,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:32:02,877 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 75 transitions. [2018-11-18 13:32:02,877 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-18 13:32:02,877 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 75 transitions. [2018-11-18 13:32:02,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-11-18 13:32:02,878 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:32:02,878 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:32:02,879 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:32:02,879 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:32:02,879 INFO L82 PathProgramCache]: Analyzing trace with hash 126265046, now seen corresponding path program 1 times [2018-11-18 13:32:02,880 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-18 13:32:02,880 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6547d8b8-79aa-4702-a824-ddda61b6886f/bin-2019/utaipan/cvc4nyu Starting monitored process 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-18 13:32:02,893 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:32:03,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:32:03,282 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:32:03,315 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-11-18 13:32:03,316 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 13:32:03,432 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-11-18 13:32:03,435 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:32:03,435 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6547d8b8-79aa-4702-a824-ddda61b6886f/bin-2019/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 13:32:03,441 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:32:03,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:32:03,623 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:32:03,653 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2018-11-18 13:32:03,653 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-18 13:32:03,671 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-11-18 13:32:03,672 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [7, 7] total 13 [2018-11-18 13:32:03,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-18 13:32:03,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-18 13:32:03,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2018-11-18 13:32:03,673 INFO L87 Difference]: Start difference. First operand 61 states and 75 transitions. Second operand 13 states. [2018-11-18 13:32:03,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:32:03,939 INFO L93 Difference]: Finished difference Result 122 states and 166 transitions. [2018-11-18 13:32:03,940 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-18 13:32:03,940 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 58 [2018-11-18 13:32:03,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:32:03,941 INFO L225 Difference]: With dead ends: 122 [2018-11-18 13:32:03,941 INFO L226 Difference]: Without dead ends: 83 [2018-11-18 13:32:03,942 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 160 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2018-11-18 13:32:03,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-11-18 13:32:03,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2018-11-18 13:32:03,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-11-18 13:32:03,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 96 transitions. [2018-11-18 13:32:03,953 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 96 transitions. Word has length 58 [2018-11-18 13:32:03,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:32:03,953 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 96 transitions. [2018-11-18 13:32:03,953 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-18 13:32:03,953 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 96 transitions. [2018-11-18 13:32:03,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-11-18 13:32:03,955 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:32:03,955 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 7, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:32:03,955 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:32:03,955 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:32:03,956 INFO L82 PathProgramCache]: Analyzing trace with hash -1367119729, now seen corresponding path program 1 times [2018-11-18 13:32:03,957 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-18 13:32:03,958 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6547d8b8-79aa-4702-a824-ddda61b6886f/bin-2019/utaipan/cvc4nyu Starting monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-18 13:32:03,983 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:32:04,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:32:04,415 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:32:04,510 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2018-11-18 13:32:04,510 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 13:32:04,835 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2018-11-18 13:32:04,843 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:32:04,844 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6547d8b8-79aa-4702-a824-ddda61b6886f/bin-2019/utaipan/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 13:32:04,852 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:32:05,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:32:05,106 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:32:05,131 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2018-11-18 13:32:05,131 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-18 13:32:05,150 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-11-18 13:32:05,151 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [13, 13] total 25 [2018-11-18 13:32:05,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-11-18 13:32:05,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-11-18 13:32:05,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2018-11-18 13:32:05,151 INFO L87 Difference]: Start difference. First operand 82 states and 96 transitions. Second operand 25 states. [2018-11-18 13:32:06,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:32:06,040 INFO L93 Difference]: Finished difference Result 160 states and 199 transitions. [2018-11-18 13:32:06,041 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-11-18 13:32:06,041 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 88 [2018-11-18 13:32:06,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:32:06,042 INFO L225 Difference]: With dead ends: 160 [2018-11-18 13:32:06,042 INFO L226 Difference]: Without dead ends: 118 [2018-11-18 13:32:06,043 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=343, Invalid=713, Unknown=0, NotChecked=0, Total=1056 [2018-11-18 13:32:06,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-11-18 13:32:06,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 116. [2018-11-18 13:32:06,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-11-18 13:32:06,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 130 transitions. [2018-11-18 13:32:06,055 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 130 transitions. Word has length 88 [2018-11-18 13:32:06,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:32:06,055 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 130 transitions. [2018-11-18 13:32:06,055 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-11-18 13:32:06,055 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 130 transitions. [2018-11-18 13:32:06,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-11-18 13:32:06,057 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:32:06,057 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 20, 7, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:32:06,057 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:32:06,057 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:32:06,057 INFO L82 PathProgramCache]: Analyzing trace with hash -2138102174, now seen corresponding path program 1 times [2018-11-18 13:32:06,058 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-18 13:32:06,058 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6547d8b8-79aa-4702-a824-ddda61b6886f/bin-2019/utaipan/cvc4nyu Starting monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-18 13:32:06,079 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:32:06,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:32:06,542 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:32:06,566 INFO L134 CoverageAnalysis]: Checked inductivity of 678 backedges. 29 proven. 3 refuted. 0 times theorem prover too weak. 646 trivial. 0 not checked. [2018-11-18 13:32:06,566 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 13:32:06,601 INFO L134 CoverageAnalysis]: Checked inductivity of 678 backedges. 5 proven. 41 refuted. 0 times theorem prover too weak. 632 trivial. 0 not checked. [2018-11-18 13:32:06,605 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:32:06,605 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6547d8b8-79aa-4702-a824-ddda61b6886f/bin-2019/utaipan/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 13:32:06,610 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:32:06,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:32:06,925 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:32:06,935 INFO L134 CoverageAnalysis]: Checked inductivity of 678 backedges. 29 proven. 3 refuted. 0 times theorem prover too weak. 646 trivial. 0 not checked. [2018-11-18 13:32:06,935 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 13:32:07,003 INFO L134 CoverageAnalysis]: Checked inductivity of 678 backedges. 5 proven. 41 refuted. 0 times theorem prover too weak. 632 trivial. 0 not checked. [2018-11-18 13:32:07,024 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-11-18 13:32:07,024 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 5] total 8 [2018-11-18 13:32:07,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-18 13:32:07,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-18 13:32:07,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2018-11-18 13:32:07,025 INFO L87 Difference]: Start difference. First operand 116 states and 130 transitions. Second operand 8 states. [2018-11-18 13:32:07,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:32:07,098 INFO L93 Difference]: Finished difference Result 171 states and 211 transitions. [2018-11-18 13:32:07,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-18 13:32:07,099 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 121 [2018-11-18 13:32:07,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:32:07,100 INFO L225 Difference]: With dead ends: 171 [2018-11-18 13:32:07,100 INFO L226 Difference]: Without dead ends: 129 [2018-11-18 13:32:07,101 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 476 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2018-11-18 13:32:07,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-11-18 13:32:07,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2018-11-18 13:32:07,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2018-11-18 13:32:07,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 142 transitions. [2018-11-18 13:32:07,112 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 142 transitions. Word has length 121 [2018-11-18 13:32:07,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:32:07,113 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 142 transitions. [2018-11-18 13:32:07,113 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-18 13:32:07,113 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 142 transitions. [2018-11-18 13:32:07,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2018-11-18 13:32:07,115 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:32:07,115 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 20, 16, 13, 13, 12, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:32:07,115 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:32:07,115 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:32:07,116 INFO L82 PathProgramCache]: Analyzing trace with hash -844482335, now seen corresponding path program 2 times [2018-11-18 13:32:07,116 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-18 13:32:07,116 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6547d8b8-79aa-4702-a824-ddda61b6886f/bin-2019/utaipan/cvc4nyu Starting monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-18 13:32:07,129 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2018-11-18 13:32:07,507 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-18 13:32:07,507 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 13:32:07,657 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:32:07,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1020 backedges. 188 proven. 36 refuted. 0 times theorem prover too weak. 796 trivial. 0 not checked. [2018-11-18 13:32:07,694 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 13:32:07,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1020 backedges. 14 proven. 242 refuted. 0 times theorem prover too weak. 764 trivial. 0 not checked. [2018-11-18 13:32:07,771 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:32:07,771 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6547d8b8-79aa-4702-a824-ddda61b6886f/bin-2019/utaipan/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 13:32:07,777 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-18 13:32:07,952 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-18 13:32:07,952 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 13:32:08,044 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:32:08,125 INFO L134 CoverageAnalysis]: Checked inductivity of 1020 backedges. 190 proven. 2 refuted. 0 times theorem prover too weak. 828 trivial. 0 not checked. [2018-11-18 13:32:08,125 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 13:32:08,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1020 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1018 trivial. 0 not checked. [2018-11-18 13:32:08,227 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-11-18 13:32:08,227 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 4, 4] total 16 [2018-11-18 13:32:08,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-18 13:32:08,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-18 13:32:08,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2018-11-18 13:32:08,228 INFO L87 Difference]: Start difference. First operand 128 states and 142 transitions. Second operand 16 states. [2018-11-18 13:32:08,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:32:08,531 INFO L93 Difference]: Finished difference Result 225 states and 277 transitions. [2018-11-18 13:32:08,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-18 13:32:08,536 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 157 [2018-11-18 13:32:08,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:32:08,538 INFO L225 Difference]: With dead ends: 225 [2018-11-18 13:32:08,538 INFO L226 Difference]: Without dead ends: 171 [2018-11-18 13:32:08,539 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 631 GetRequests, 612 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2018-11-18 13:32:08,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-11-18 13:32:08,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 170. [2018-11-18 13:32:08,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2018-11-18 13:32:08,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 184 transitions. [2018-11-18 13:32:08,552 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 184 transitions. Word has length 157 [2018-11-18 13:32:08,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:32:08,552 INFO L480 AbstractCegarLoop]: Abstraction has 170 states and 184 transitions. [2018-11-18 13:32:08,553 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-18 13:32:08,553 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 184 transitions. [2018-11-18 13:32:08,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2018-11-18 13:32:08,555 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:32:08,555 INFO L375 BasicCegarLoop]: trace histogram [34, 31, 31, 30, 21, 20, 20, 5, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:32:08,556 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:32:08,556 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:32:08,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1564725328, now seen corresponding path program 3 times [2018-11-18 13:32:08,556 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-18 13:32:08,556 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6547d8b8-79aa-4702-a824-ddda61b6886f/bin-2019/utaipan/cvc4nyu Starting monitored process 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-18 13:32:08,581 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2018-11-18 13:32:08,631 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-11-18 13:32:08,631 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 13:32:08,635 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:32:08,687 INFO L134 CoverageAnalysis]: Checked inductivity of 2700 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 2568 trivial. 0 not checked. [2018-11-18 13:32:08,687 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-18 13:32:08,689 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 13:32:08,689 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-18 13:32:08,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 13:32:08,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 13:32:08,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-11-18 13:32:08,690 INFO L87 Difference]: Start difference. First operand 170 states and 184 transitions. Second operand 5 states. [2018-11-18 13:32:08,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:32:08,742 INFO L93 Difference]: Finished difference Result 273 states and 310 transitions. [2018-11-18 13:32:08,742 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-18 13:32:08,742 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 238 [2018-11-18 13:32:08,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:32:08,743 INFO L225 Difference]: With dead ends: 273 [2018-11-18 13:32:08,743 INFO L226 Difference]: Without dead ends: 177 [2018-11-18 13:32:08,744 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-11-18 13:32:08,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2018-11-18 13:32:08,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 172. [2018-11-18 13:32:08,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2018-11-18 13:32:08,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 185 transitions. [2018-11-18 13:32:08,753 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 185 transitions. Word has length 238 [2018-11-18 13:32:08,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:32:08,754 INFO L480 AbstractCegarLoop]: Abstraction has 172 states and 185 transitions. [2018-11-18 13:32:08,754 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 13:32:08,754 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 185 transitions. [2018-11-18 13:32:08,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2018-11-18 13:32:08,757 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:32:08,758 INFO L375 BasicCegarLoop]: trace histogram [39, 36, 36, 30, 21, 20, 20, 6, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:32:08,758 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:32:08,758 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:32:08,758 INFO L82 PathProgramCache]: Analyzing trace with hash 300838215, now seen corresponding path program 1 times [2018-11-18 13:32:08,759 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-18 13:32:08,759 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6547d8b8-79aa-4702-a824-ddda61b6886f/bin-2019/utaipan/cvc4nyu Starting monitored process 16 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-18 13:32:08,779 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 13:32:09,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:32:10,243 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:32:10,333 INFO L134 CoverageAnalysis]: Checked inductivity of 3390 backedges. 1153 proven. 210 refuted. 0 times theorem prover too weak. 2027 trivial. 0 not checked. [2018-11-18 13:32:10,334 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 13:32:10,550 INFO L134 CoverageAnalysis]: Checked inductivity of 3390 backedges. 75 proven. 1468 refuted. 0 times theorem prover too weak. 1847 trivial. 0 not checked. [2018-11-18 13:32:10,556 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:32:10,556 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6547d8b8-79aa-4702-a824-ddda61b6886f/bin-2019/utaipan/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 13:32:10,561 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:32:11,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:32:11,307 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:32:11,434 INFO L134 CoverageAnalysis]: Checked inductivity of 3390 backedges. 1260 proven. 26 refuted. 0 times theorem prover too weak. 2104 trivial. 0 not checked. [2018-11-18 13:32:11,434 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 13:32:11,646 INFO L134 CoverageAnalysis]: Checked inductivity of 3390 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 3364 trivial. 0 not checked. [2018-11-18 13:32:11,673 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-11-18 13:32:11,673 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 7, 7] total 34 [2018-11-18 13:32:11,674 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-11-18 13:32:11,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-11-18 13:32:11,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=966, Unknown=0, NotChecked=0, Total=1122 [2018-11-18 13:32:11,674 INFO L87 Difference]: Start difference. First operand 172 states and 185 transitions. Second operand 34 states. [2018-11-18 13:32:12,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:32:12,468 INFO L93 Difference]: Finished difference Result 311 states and 356 transitions. [2018-11-18 13:32:12,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-11-18 13:32:12,469 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 258 [2018-11-18 13:32:12,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:32:12,470 INFO L225 Difference]: With dead ends: 311 [2018-11-18 13:32:12,470 INFO L226 Difference]: Without dead ends: 213 [2018-11-18 13:32:12,471 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1034 GetRequests, 998 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=204, Invalid=1202, Unknown=0, NotChecked=0, Total=1406 [2018-11-18 13:32:12,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2018-11-18 13:32:12,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 212. [2018-11-18 13:32:12,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2018-11-18 13:32:12,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 225 transitions. [2018-11-18 13:32:12,480 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 225 transitions. Word has length 258 [2018-11-18 13:32:12,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:32:12,481 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 225 transitions. [2018-11-18 13:32:12,481 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-11-18 13:32:12,481 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 225 transitions. [2018-11-18 13:32:12,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2018-11-18 13:32:12,482 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:32:12,482 INFO L375 BasicCegarLoop]: trace histogram [42, 39, 39, 33, 21, 20, 20, 11, 10, 10, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:32:12,482 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:32:12,482 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:32:12,482 INFO L82 PathProgramCache]: Analyzing trace with hash -717337440, now seen corresponding path program 2 times [2018-11-18 13:32:12,483 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-18 13:32:12,483 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6547d8b8-79aa-4702-a824-ddda61b6886f/bin-2019/utaipan/cvc4nyu Starting monitored process 18 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-18 13:32:12,495 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2018-11-18 13:32:14,114 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-18 13:32:14,114 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 13:32:14,551 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:32:14,655 INFO L134 CoverageAnalysis]: Checked inductivity of 3981 backedges. 1462 proven. 338 refuted. 0 times theorem prover too weak. 2181 trivial. 0 not checked. [2018-11-18 13:32:14,655 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 13:32:15,070 INFO L134 CoverageAnalysis]: Checked inductivity of 3981 backedges. 0 proven. 1804 refuted. 0 times theorem prover too weak. 2177 trivial. 0 not checked. [2018-11-18 13:32:15,078 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:32:15,078 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6547d8b8-79aa-4702-a824-ddda61b6886f/bin-2019/utaipan/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 13:32:15,084 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-18 13:32:15,853 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-18 13:32:15,853 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 13:32:16,221 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:32:16,269 INFO L134 CoverageAnalysis]: Checked inductivity of 3981 backedges. 1466 proven. 338 refuted. 0 times theorem prover too weak. 2177 trivial. 0 not checked. [2018-11-18 13:32:16,269 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 13:32:17,305 INFO L134 CoverageAnalysis]: Checked inductivity of 3981 backedges. 1466 proven. 338 refuted. 0 times theorem prover too weak. 2177 trivial. 0 not checked. [2018-11-18 13:32:17,334 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-11-18 13:32:17,334 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16, 17] total 43 [2018-11-18 13:32:17,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-11-18 13:32:17,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-11-18 13:32:17,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=517, Invalid=1289, Unknown=0, NotChecked=0, Total=1806 [2018-11-18 13:32:17,336 INFO L87 Difference]: Start difference. First operand 212 states and 225 transitions. Second operand 43 states. [2018-11-18 13:32:17,906 WARN L180 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2018-11-18 13:32:18,451 WARN L180 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2018-11-18 13:32:19,041 WARN L180 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2018-11-18 13:32:19,495 WARN L180 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2018-11-18 13:32:20,183 WARN L180 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2018-11-18 13:32:20,678 WARN L180 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2018-11-18 13:32:21,410 WARN L180 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2018-11-18 13:32:21,797 WARN L180 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2018-11-18 13:32:22,382 WARN L180 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2018-11-18 13:32:22,810 WARN L180 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2018-11-18 13:32:23,424 WARN L180 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2018-11-18 13:32:23,853 WARN L180 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2018-11-18 13:32:24,315 WARN L180 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2018-11-18 13:32:24,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:32:24,322 INFO L93 Difference]: Finished difference Result 399 states and 451 transitions. [2018-11-18 13:32:24,322 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-11-18 13:32:24,322 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 288 [2018-11-18 13:32:24,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:32:24,324 INFO L225 Difference]: With dead ends: 399 [2018-11-18 13:32:24,324 INFO L226 Difference]: Without dead ends: 261 [2018-11-18 13:32:24,326 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1170 GetRequests, 1107 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=1072, Invalid=2710, Unknown=0, NotChecked=0, Total=3782 [2018-11-18 13:32:24,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2018-11-18 13:32:24,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 260. [2018-11-18 13:32:24,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2018-11-18 13:32:24,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 278 transitions. [2018-11-18 13:32:24,346 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 278 transitions. Word has length 288 [2018-11-18 13:32:24,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:32:24,346 INFO L480 AbstractCegarLoop]: Abstraction has 260 states and 278 transitions. [2018-11-18 13:32:24,346 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-11-18 13:32:24,347 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 278 transitions. [2018-11-18 13:32:24,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 373 [2018-11-18 13:32:24,349 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:32:24,349 INFO L375 BasicCegarLoop]: trace histogram [63, 60, 60, 33, 27, 21, 20, 20, 11, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:32:24,349 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:32:24,349 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:32:24,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1265522465, now seen corresponding path program 3 times [2018-11-18 13:32:24,350 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-18 13:32:24,350 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6547d8b8-79aa-4702-a824-ddda61b6886f/bin-2019/utaipan/cvc4nyu Starting monitored process 20 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-18 13:32:24,375 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2018-11-18 13:37:20,573 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-11-18 13:37:20,574 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 13:37:21,017 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:37:21,148 INFO L134 CoverageAnalysis]: Checked inductivity of 8223 backedges. 3372 proven. 155 refuted. 0 times theorem prover too weak. 4696 trivial. 0 not checked. [2018-11-18 13:37:21,148 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 13:37:21,517 INFO L134 CoverageAnalysis]: Checked inductivity of 8223 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 8068 trivial. 0 not checked. [2018-11-18 13:37:21,541 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:37:21,541 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6547d8b8-79aa-4702-a824-ddda61b6886f/bin-2019/utaipan/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 13:37:21,548 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 13:38:24,227 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-11-18 13:38:24,227 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 13:38:24,407 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:38:24,485 INFO L134 CoverageAnalysis]: Checked inductivity of 8223 backedges. 3372 proven. 155 refuted. 0 times theorem prover too weak. 4696 trivial. 0 not checked. [2018-11-18 13:38:24,486 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 13:38:25,177 INFO L134 CoverageAnalysis]: Checked inductivity of 8223 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 8068 trivial. 0 not checked. [2018-11-18 13:38:25,209 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-11-18 13:38:25,210 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 14] total 34 [2018-11-18 13:38:25,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-11-18 13:38:25,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-11-18 13:38:25,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=346, Invalid=776, Unknown=0, NotChecked=0, Total=1122 [2018-11-18 13:38:25,211 INFO L87 Difference]: Start difference. First operand 260 states and 278 transitions. Second operand 34 states. [2018-11-18 13:38:27,089 WARN L180 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2018-11-18 13:38:27,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:38:27,283 INFO L93 Difference]: Finished difference Result 448 states and 499 transitions. [2018-11-18 13:38:27,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-11-18 13:38:27,285 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 372 [2018-11-18 13:38:27,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:38:27,287 INFO L225 Difference]: With dead ends: 448 [2018-11-18 13:38:27,287 INFO L226 Difference]: Without dead ends: 332 [2018-11-18 13:38:27,288 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1498 GetRequests, 1453 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=644, Invalid=1426, Unknown=0, NotChecked=0, Total=2070 [2018-11-18 13:38:27,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2018-11-18 13:38:27,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 332. [2018-11-18 13:38:27,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 332 states. [2018-11-18 13:38:27,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 352 transitions. [2018-11-18 13:38:27,310 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 352 transitions. Word has length 372 [2018-11-18 13:38:27,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:38:27,310 INFO L480 AbstractCegarLoop]: Abstraction has 332 states and 352 transitions. [2018-11-18 13:38:27,310 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-11-18 13:38:27,310 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 352 transitions. [2018-11-18 13:38:27,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 400 [2018-11-18 13:38:27,311 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:38:27,311 INFO L375 BasicCegarLoop]: trace histogram [63, 60, 60, 33, 27, 21, 20, 20, 20, 19, 19, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:38:27,312 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:38:27,312 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:38:27,312 INFO L82 PathProgramCache]: Analyzing trace with hash -274838592, now seen corresponding path program 4 times [2018-11-18 13:38:27,312 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-18 13:38:27,312 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6547d8b8-79aa-4702-a824-ddda61b6886f/bin-2019/utaipan/cvc4nyu Starting monitored process 22 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-18 13:38:27,323 INFO L101 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 13:38:54,367 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 13:38:54,367 INFO L250 tOrderPrioritization]: Conjunction of SSA is sat [2018-11-18 13:39:10,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 13:39:11,681 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-11-18 13:39:11,787 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.11 01:39:11 BoogieIcfgContainer [2018-11-18 13:39:11,787 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-18 13:39:11,787 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-18 13:39:11,787 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-18 13:39:11,787 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-18 13:39:11,789 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 01:32:01" (3/4) ... [2018-11-18 13:39:11,791 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-11-18 13:39:11,877 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_6547d8b8-79aa-4702-a824-ddda61b6886f/bin-2019/utaipan/witness.graphml [2018-11-18 13:39:11,877 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-18 13:39:11,878 INFO L168 Benchmark]: Toolchain (without parser) took 430925.56 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 313.0 MB). Free memory was 949.7 MB in the beginning and 1.1 GB in the end (delta: -129.0 MB). Peak memory consumption was 184.0 MB. Max. memory is 11.5 GB. [2018-11-18 13:39:11,878 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 13:39:11,878 INFO L168 Benchmark]: CACSL2BoogieTranslator took 207.01 ms. Allocated memory is still 1.0 GB. Free memory was 949.7 MB in the beginning and 933.6 MB in the end (delta: 16.1 MB). Peak memory consumption was 16.1 MB. Max. memory is 11.5 GB. [2018-11-18 13:39:11,879 INFO L168 Benchmark]: Boogie Procedure Inliner took 15.52 ms. Allocated memory is still 1.0 GB. Free memory is still 933.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 13:39:11,879 INFO L168 Benchmark]: Boogie Preprocessor took 19.82 ms. Allocated memory is still 1.0 GB. Free memory is still 933.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 13:39:11,879 INFO L168 Benchmark]: RCFGBuilder took 598.95 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 134.7 MB). Free memory was 933.6 MB in the beginning and 1.1 GB in the end (delta: -162.1 MB). Peak memory consumption was 15.5 MB. Max. memory is 11.5 GB. [2018-11-18 13:39:11,879 INFO L168 Benchmark]: TraceAbstraction took 429990.92 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 178.3 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -3.7 MB). Peak memory consumption was 174.5 MB. Max. memory is 11.5 GB. [2018-11-18 13:39:11,879 INFO L168 Benchmark]: Witness Printer took 89.87 ms. Allocated memory is still 1.3 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 20.8 MB). Peak memory consumption was 20.8 MB. Max. memory is 11.5 GB. [2018-11-18 13:39:11,881 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 207.01 ms. Allocated memory is still 1.0 GB. Free memory was 949.7 MB in the beginning and 933.6 MB in the end (delta: 16.1 MB). Peak memory consumption was 16.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 15.52 ms. Allocated memory is still 1.0 GB. Free memory is still 933.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 19.82 ms. Allocated memory is still 1.0 GB. Free memory is still 933.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 598.95 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 134.7 MB). Free memory was 933.6 MB in the beginning and 1.1 GB in the end (delta: -162.1 MB). Peak memory consumption was 15.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 429990.92 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 178.3 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -3.7 MB). Peak memory consumption was 174.5 MB. Max. memory is 11.5 GB. * Witness Printer took 89.87 ms. Allocated memory is still 1.3 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 20.8 MB). Peak memory consumption was 20.8 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 50]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L31] FCALL int x[20]; VAL [x={1:0}] [L32] CALL init_nondet(x) VAL [x={1:0}] [L5] int i; [L6] i = 0 VAL [i=0, x={1:0}, x={1:0}] [L6] COND TRUE i < 20 [L7] FCALL x[i] = __VERIFIER_nondet_int() [L6] i++ VAL [i=1, x={1:0}, x={1:0}] [L6] COND TRUE i < 20 [L7] FCALL x[i] = __VERIFIER_nondet_int() [L6] i++ VAL [i=2, x={1:0}, x={1:0}] [L6] COND TRUE i < 20 [L7] FCALL x[i] = __VERIFIER_nondet_int() [L6] i++ VAL [i=3, x={1:0}, x={1:0}] [L6] COND TRUE i < 20 [L7] FCALL x[i] = __VERIFIER_nondet_int() [L6] i++ VAL [i=4, x={1:0}, x={1:0}] [L6] COND TRUE i < 20 [L7] FCALL x[i] = __VERIFIER_nondet_int() [L6] i++ VAL [i=5, x={1:0}, x={1:0}] [L6] COND TRUE i < 20 [L7] FCALL x[i] = __VERIFIER_nondet_int() [L6] i++ VAL [i=6, x={1:0}, x={1:0}] [L6] COND TRUE i < 20 [L7] FCALL x[i] = __VERIFIER_nondet_int() [L6] i++ VAL [i=7, x={1:0}, x={1:0}] [L6] COND TRUE i < 20 [L7] FCALL x[i] = __VERIFIER_nondet_int() [L6] i++ VAL [i=8, x={1:0}, x={1:0}] [L6] COND TRUE i < 20 [L7] FCALL x[i] = __VERIFIER_nondet_int() [L6] i++ VAL [i=9, x={1:0}, x={1:0}] [L6] COND TRUE i < 20 [L7] FCALL x[i] = __VERIFIER_nondet_int() [L6] i++ VAL [i=10, x={1:0}, x={1:0}] [L6] COND TRUE i < 20 [L7] FCALL x[i] = __VERIFIER_nondet_int() [L6] i++ VAL [i=11, x={1:0}, x={1:0}] [L6] COND TRUE i < 20 [L7] FCALL x[i] = __VERIFIER_nondet_int() [L6] i++ VAL [i=12, x={1:0}, x={1:0}] [L6] COND TRUE i < 20 [L7] FCALL x[i] = __VERIFIER_nondet_int() [L6] i++ VAL [i=13, x={1:0}, x={1:0}] [L6] COND TRUE i < 20 [L7] FCALL x[i] = __VERIFIER_nondet_int() [L6] i++ VAL [i=14, x={1:0}, x={1:0}] [L6] COND TRUE i < 20 [L7] FCALL x[i] = __VERIFIER_nondet_int() [L6] i++ VAL [i=15, x={1:0}, x={1:0}] [L6] COND TRUE i < 20 [L7] FCALL x[i] = __VERIFIER_nondet_int() [L6] i++ VAL [i=16, x={1:0}, x={1:0}] [L6] COND TRUE i < 20 [L7] FCALL x[i] = __VERIFIER_nondet_int() [L6] i++ VAL [i=17, x={1:0}, x={1:0}] [L6] COND TRUE i < 20 [L7] FCALL x[i] = __VERIFIER_nondet_int() [L6] i++ VAL [i=18, x={1:0}, x={1:0}] [L6] COND TRUE i < 20 [L7] FCALL x[i] = __VERIFIER_nondet_int() [L6] i++ VAL [i=19, x={1:0}, x={1:0}] [L6] COND TRUE i < 20 [L7] FCALL x[i] = __VERIFIER_nondet_int() [L6] i++ VAL [i=20, x={1:0}, x={1:0}] [L6] COND FALSE, RET !(i < 20) VAL [i=20, x={1:0}, x={1:0}] [L32] init_nondet(x) VAL [x={1:0}] [L33] int temp; [L34] int ret; [L35] int ret2; [L36] int ret5; VAL [x={1:0}] [L38] CALL, EXPR rangesum(x) VAL [x={1:0}] [L13] int i; [L14] long long ret; [L15] ret = 0 [L16] int cnt = 0; [L17] i = 0 VAL [cnt=0, i=0, ret=0, x={1:0}, x={1:0}] [L17] COND TRUE i < 20 VAL [cnt=0, i=0, ret=0, x={1:0}, x={1:0}] [L18] COND FALSE !(i > 20/2) VAL [cnt=0, i=0, ret=0, x={1:0}, x={1:0}] [L17] i++ VAL [cnt=0, i=1, ret=0, x={1:0}, x={1:0}] [L17] COND TRUE i < 20 VAL [cnt=0, i=1, ret=0, x={1:0}, x={1:0}] [L18] COND FALSE !(i > 20/2) VAL [cnt=0, i=1, ret=0, x={1:0}, x={1:0}] [L17] i++ VAL [cnt=0, i=2, ret=0, x={1:0}, x={1:0}] [L17] COND TRUE i < 20 VAL [cnt=0, i=2, ret=0, x={1:0}, x={1:0}] [L18] COND FALSE !(i > 20/2) VAL [cnt=0, i=2, ret=0, x={1:0}, x={1:0}] [L17] i++ VAL [cnt=0, i=3, ret=0, x={1:0}, x={1:0}] [L17] COND TRUE i < 20 VAL [cnt=0, i=3, ret=0, x={1:0}, x={1:0}] [L18] COND FALSE !(i > 20/2) VAL [cnt=0, i=3, ret=0, x={1:0}, x={1:0}] [L17] i++ VAL [cnt=0, i=4, ret=0, x={1:0}, x={1:0}] [L17] COND TRUE i < 20 VAL [cnt=0, i=4, ret=0, x={1:0}, x={1:0}] [L18] COND FALSE !(i > 20/2) VAL [cnt=0, i=4, ret=0, x={1:0}, x={1:0}] [L17] i++ VAL [cnt=0, i=5, ret=0, x={1:0}, x={1:0}] [L17] COND TRUE i < 20 VAL [cnt=0, i=5, ret=0, x={1:0}, x={1:0}] [L18] COND FALSE !(i > 20/2) VAL [cnt=0, i=5, ret=0, x={1:0}, x={1:0}] [L17] i++ VAL [cnt=0, i=6, ret=0, x={1:0}, x={1:0}] [L17] COND TRUE i < 20 VAL [cnt=0, i=6, ret=0, x={1:0}, x={1:0}] [L18] COND FALSE !(i > 20/2) VAL [cnt=0, i=6, ret=0, x={1:0}, x={1:0}] [L17] i++ VAL [cnt=0, i=7, ret=0, x={1:0}, x={1:0}] [L17] COND TRUE i < 20 VAL [cnt=0, i=7, ret=0, x={1:0}, x={1:0}] [L18] COND FALSE !(i > 20/2) VAL [cnt=0, i=7, ret=0, x={1:0}, x={1:0}] [L17] i++ VAL [cnt=0, i=8, ret=0, x={1:0}, x={1:0}] [L17] COND TRUE i < 20 VAL [cnt=0, i=8, ret=0, x={1:0}, x={1:0}] [L18] COND FALSE !(i > 20/2) VAL [cnt=0, i=8, ret=0, x={1:0}, x={1:0}] [L17] i++ VAL [cnt=0, i=9, ret=0, x={1:0}, x={1:0}] [L17] COND TRUE i < 20 VAL [cnt=0, i=9, ret=0, x={1:0}, x={1:0}] [L18] COND FALSE !(i > 20/2) VAL [cnt=0, i=9, ret=0, x={1:0}, x={1:0}] [L17] i++ VAL [cnt=0, i=10, ret=0, x={1:0}, x={1:0}] [L17] COND TRUE i < 20 VAL [cnt=0, i=10, ret=0, x={1:0}, x={1:0}] [L18] COND FALSE !(i > 20/2) VAL [cnt=0, i=10, ret=0, x={1:0}, x={1:0}] [L17] i++ VAL [cnt=0, i=11, ret=0, x={1:0}, x={1:0}] [L17] COND TRUE i < 20 VAL [cnt=0, i=11, ret=0, x={1:0}, x={1:0}] [L18] COND TRUE i > 20/2 [L19] EXPR, FCALL x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 VAL [cnt=1, i=11, ret=2087783867, x={1:0}, x={1:0}] [L17] i++ VAL [cnt=1, i=12, ret=2087783867, x={1:0}, x={1:0}] [L17] COND TRUE i < 20 VAL [cnt=1, i=12, ret=2087783867, x={1:0}, x={1:0}] [L18] COND TRUE i > 20/2 [L19] EXPR, FCALL x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 VAL [cnt=2, i=12, ret=4234618010, x={1:0}, x={1:0}] [L17] i++ VAL [cnt=2, i=13, ret=4234618010, x={1:0}, x={1:0}] [L17] COND TRUE i < 20 VAL [cnt=2, i=13, ret=4234618010, x={1:0}, x={1:0}] [L18] COND TRUE i > 20/2 [L19] EXPR, FCALL x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 VAL [cnt=3, i=13, ret=3930347776, x={1:0}, x={1:0}] [L17] i++ VAL [cnt=3, i=14, ret=3930347776, x={1:0}, x={1:0}] [L17] COND TRUE i < 20 VAL [cnt=3, i=14, ret=3930347776, x={1:0}, x={1:0}] [L18] COND TRUE i > 20/2 [L19] EXPR, FCALL x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 VAL [cnt=4, i=14, ret=3720482514, x={1:0}, x={1:0}] [L17] i++ VAL [cnt=4, i=15, ret=3720482514, x={1:0}, x={1:0}] [L17] COND TRUE i < 20 VAL [cnt=4, i=15, ret=3720482514, x={1:0}, x={1:0}] [L18] COND TRUE i > 20/2 [L19] EXPR, FCALL x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 VAL [cnt=5, i=15, ret=3190899545, x={1:0}, x={1:0}] [L17] i++ VAL [cnt=5, i=16, ret=3190899545, x={1:0}, x={1:0}] [L17] COND TRUE i < 20 VAL [cnt=5, i=16, ret=3190899545, x={1:0}, x={1:0}] [L18] COND TRUE i > 20/2 [L19] EXPR, FCALL x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 VAL [cnt=6, i=16, ret=2704291840, x={1:0}, x={1:0}] [L17] i++ VAL [cnt=6, i=17, ret=2704291840, x={1:0}, x={1:0}] [L17] COND TRUE i < 20 VAL [cnt=6, i=17, ret=2704291840, x={1:0}, x={1:0}] [L18] COND TRUE i > 20/2 [L19] EXPR, FCALL x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 VAL [cnt=7, i=17, ret=4359458935, x={1:0}, x={1:0}] [L17] i++ VAL [cnt=7, i=18, ret=4359458935, x={1:0}, x={1:0}] [L17] COND TRUE i < 20 VAL [cnt=7, i=18, ret=4359458935, x={1:0}, x={1:0}] [L18] COND TRUE i > 20/2 [L19] EXPR, FCALL x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 VAL [cnt=8, i=18, ret=2851605146, x={1:0}, x={1:0}] [L17] i++ VAL [cnt=8, i=19, ret=2851605146, x={1:0}, x={1:0}] [L17] COND TRUE i < 20 VAL [cnt=8, i=19, ret=2851605146, x={1:0}, x={1:0}] [L18] COND TRUE i > 20/2 [L19] EXPR, FCALL x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 VAL [cnt=9, i=19, ret=3045591585, x={1:0}, x={1:0}] [L17] i++ VAL [cnt=9, i=20, ret=3045591585, x={1:0}, x={1:0}] [L17] COND FALSE !(i < 20) VAL [cnt=9, i=20, ret=3045591585, x={1:0}, x={1:0}] [L23] COND TRUE cnt !=0 [L24] RET return ret / cnt; VAL [\result=338399065, cnt=9, i=20, ret=3045591585, x={1:0}, x={1:0}] [L38] EXPR rangesum(x) VAL [rangesum(x)=338399065, x={1:0}] [L38] ret = rangesum(x) [L40] EXPR, FCALL x[0] [L40] temp=x[0] [L40] EXPR, FCALL x[1] [L40] FCALL x[0] = x[1] [L40] FCALL x[1] = temp VAL [ret=338399065, temp=0, x={1:0}] [L41] CALL, EXPR rangesum(x) VAL [x={1:0}] [L13] int i; [L14] long long ret; [L15] ret = 0 [L16] int cnt = 0; [L17] i = 0 VAL [cnt=0, i=0, ret=0, x={1:0}, x={1:0}] [L17] COND TRUE i < 20 VAL [cnt=0, i=0, ret=0, x={1:0}, x={1:0}] [L18] COND FALSE !(i > 20/2) VAL [cnt=0, i=0, ret=0, x={1:0}, x={1:0}] [L17] i++ VAL [cnt=0, i=1, ret=0, x={1:0}, x={1:0}] [L17] COND TRUE i < 20 VAL [cnt=0, i=1, ret=0, x={1:0}, x={1:0}] [L18] COND FALSE !(i > 20/2) VAL [cnt=0, i=1, ret=0, x={1:0}, x={1:0}] [L17] i++ VAL [cnt=0, i=2, ret=0, x={1:0}, x={1:0}] [L17] COND TRUE i < 20 VAL [cnt=0, i=2, ret=0, x={1:0}, x={1:0}] [L18] COND FALSE !(i > 20/2) VAL [cnt=0, i=2, ret=0, x={1:0}, x={1:0}] [L17] i++ VAL [cnt=0, i=3, ret=0, x={1:0}, x={1:0}] [L17] COND TRUE i < 20 VAL [cnt=0, i=3, ret=0, x={1:0}, x={1:0}] [L18] COND FALSE !(i > 20/2) VAL [cnt=0, i=3, ret=0, x={1:0}, x={1:0}] [L17] i++ VAL [cnt=0, i=4, ret=0, x={1:0}, x={1:0}] [L17] COND TRUE i < 20 VAL [cnt=0, i=4, ret=0, x={1:0}, x={1:0}] [L18] COND FALSE !(i > 20/2) VAL [cnt=0, i=4, ret=0, x={1:0}, x={1:0}] [L17] i++ VAL [cnt=0, i=5, ret=0, x={1:0}, x={1:0}] [L17] COND TRUE i < 20 VAL [cnt=0, i=5, ret=0, x={1:0}, x={1:0}] [L18] COND FALSE !(i > 20/2) VAL [cnt=0, i=5, ret=0, x={1:0}, x={1:0}] [L17] i++ VAL [cnt=0, i=6, ret=0, x={1:0}, x={1:0}] [L17] COND TRUE i < 20 VAL [cnt=0, i=6, ret=0, x={1:0}, x={1:0}] [L18] COND FALSE !(i > 20/2) VAL [cnt=0, i=6, ret=0, x={1:0}, x={1:0}] [L17] i++ VAL [cnt=0, i=7, ret=0, x={1:0}, x={1:0}] [L17] COND TRUE i < 20 VAL [cnt=0, i=7, ret=0, x={1:0}, x={1:0}] [L18] COND FALSE !(i > 20/2) VAL [cnt=0, i=7, ret=0, x={1:0}, x={1:0}] [L17] i++ VAL [cnt=0, i=8, ret=0, x={1:0}, x={1:0}] [L17] COND TRUE i < 20 VAL [cnt=0, i=8, ret=0, x={1:0}, x={1:0}] [L18] COND FALSE !(i > 20/2) VAL [cnt=0, i=8, ret=0, x={1:0}, x={1:0}] [L17] i++ VAL [cnt=0, i=9, ret=0, x={1:0}, x={1:0}] [L17] COND TRUE i < 20 VAL [cnt=0, i=9, ret=0, x={1:0}, x={1:0}] [L18] COND FALSE !(i > 20/2) VAL [cnt=0, i=9, ret=0, x={1:0}, x={1:0}] [L17] i++ VAL [cnt=0, i=10, ret=0, x={1:0}, x={1:0}] [L17] COND TRUE i < 20 VAL [cnt=0, i=10, ret=0, x={1:0}, x={1:0}] [L18] COND FALSE !(i > 20/2) VAL [cnt=0, i=10, ret=0, x={1:0}, x={1:0}] [L17] i++ VAL [cnt=0, i=11, ret=0, x={1:0}, x={1:0}] [L17] COND TRUE i < 20 VAL [cnt=0, i=11, ret=0, x={1:0}, x={1:0}] [L18] COND TRUE i > 20/2 [L19] EXPR, FCALL x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 VAL [cnt=1, i=11, ret=2087783867, x={1:0}, x={1:0}] [L17] i++ VAL [cnt=1, i=12, ret=2087783867, x={1:0}, x={1:0}] [L17] COND TRUE i < 20 VAL [cnt=1, i=12, ret=2087783867, x={1:0}, x={1:0}] [L18] COND TRUE i > 20/2 [L19] EXPR, FCALL x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 VAL [cnt=2, i=12, ret=4234618010, x={1:0}, x={1:0}] [L17] i++ VAL [cnt=2, i=13, ret=4234618010, x={1:0}, x={1:0}] [L17] COND TRUE i < 20 VAL [cnt=2, i=13, ret=4234618010, x={1:0}, x={1:0}] [L18] COND TRUE i > 20/2 [L19] EXPR, FCALL x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 VAL [cnt=3, i=13, ret=3930347776, x={1:0}, x={1:0}] [L17] i++ VAL [cnt=3, i=14, ret=3930347776, x={1:0}, x={1:0}] [L17] COND TRUE i < 20 VAL [cnt=3, i=14, ret=3930347776, x={1:0}, x={1:0}] [L18] COND TRUE i > 20/2 [L19] EXPR, FCALL x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 VAL [cnt=4, i=14, ret=3720482514, x={1:0}, x={1:0}] [L17] i++ VAL [cnt=4, i=15, ret=3720482514, x={1:0}, x={1:0}] [L17] COND TRUE i < 20 VAL [cnt=4, i=15, ret=3720482514, x={1:0}, x={1:0}] [L18] COND TRUE i > 20/2 [L19] EXPR, FCALL x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 VAL [cnt=5, i=15, ret=3190899545, x={1:0}, x={1:0}] [L17] i++ VAL [cnt=5, i=16, ret=3190899545, x={1:0}, x={1:0}] [L17] COND TRUE i < 20 VAL [cnt=5, i=16, ret=3190899545, x={1:0}, x={1:0}] [L18] COND TRUE i > 20/2 [L19] EXPR, FCALL x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 VAL [cnt=6, i=16, ret=2704291840, x={1:0}, x={1:0}] [L17] i++ VAL [cnt=6, i=17, ret=2704291840, x={1:0}, x={1:0}] [L17] COND TRUE i < 20 VAL [cnt=6, i=17, ret=2704291840, x={1:0}, x={1:0}] [L18] COND TRUE i > 20/2 [L19] EXPR, FCALL x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 VAL [cnt=7, i=17, ret=4359458935, x={1:0}, x={1:0}] [L17] i++ VAL [cnt=7, i=18, ret=4359458935, x={1:0}, x={1:0}] [L17] COND TRUE i < 20 VAL [cnt=7, i=18, ret=4359458935, x={1:0}, x={1:0}] [L18] COND TRUE i > 20/2 [L19] EXPR, FCALL x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 VAL [cnt=8, i=18, ret=2851605146, x={1:0}, x={1:0}] [L17] i++ VAL [cnt=8, i=19, ret=2851605146, x={1:0}, x={1:0}] [L17] COND TRUE i < 20 VAL [cnt=8, i=19, ret=2851605146, x={1:0}, x={1:0}] [L18] COND TRUE i > 20/2 [L19] EXPR, FCALL x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 VAL [cnt=9, i=19, ret=3045591585, x={1:0}, x={1:0}] [L17] i++ VAL [cnt=9, i=20, ret=3045591585, x={1:0}, x={1:0}] [L17] COND FALSE !(i < 20) VAL [cnt=9, i=20, ret=3045591585, x={1:0}, x={1:0}] [L23] COND TRUE cnt !=0 [L24] RET return ret / cnt; VAL [\result=338399065, cnt=9, i=20, ret=3045591585, x={1:0}, x={1:0}] [L41] EXPR rangesum(x) VAL [rangesum(x)=338399065, ret=338399065, temp=0, x={1:0}] [L41] ret2 = rangesum(x) [L42] EXPR, FCALL x[0] [L42] temp=x[0] [L43] int i =0 ; VAL [i=0, ret=338399065, ret2=338399065, temp=3616211188, x={1:0}] [L43] COND TRUE i<20 -1 [L44] EXPR, FCALL x[i+1] [L44] FCALL x[i] = x[i+1] [L43] i++ VAL [i=1, ret=338399065, ret2=338399065, temp=3616211188, x={1:0}] [L43] COND TRUE i<20 -1 [L44] EXPR, FCALL x[i+1] [L44] FCALL x[i] = x[i+1] [L43] i++ VAL [i=2, ret=338399065, ret2=338399065, temp=3616211188, x={1:0}] [L43] COND TRUE i<20 -1 [L44] EXPR, FCALL x[i+1] [L44] FCALL x[i] = x[i+1] [L43] i++ VAL [i=3, ret=338399065, ret2=338399065, temp=3616211188, x={1:0}] [L43] COND TRUE i<20 -1 [L44] EXPR, FCALL x[i+1] [L44] FCALL x[i] = x[i+1] [L43] i++ VAL [i=4, ret=338399065, ret2=338399065, temp=3616211188, x={1:0}] [L43] COND TRUE i<20 -1 [L44] EXPR, FCALL x[i+1] [L44] FCALL x[i] = x[i+1] [L43] i++ VAL [i=5, ret=338399065, ret2=338399065, temp=3616211188, x={1:0}] [L43] COND TRUE i<20 -1 [L44] EXPR, FCALL x[i+1] [L44] FCALL x[i] = x[i+1] [L43] i++ VAL [i=6, ret=338399065, ret2=338399065, temp=3616211188, x={1:0}] [L43] COND TRUE i<20 -1 [L44] EXPR, FCALL x[i+1] [L44] FCALL x[i] = x[i+1] [L43] i++ VAL [i=7, ret=338399065, ret2=338399065, temp=3616211188, x={1:0}] [L43] COND TRUE i<20 -1 [L44] EXPR, FCALL x[i+1] [L44] FCALL x[i] = x[i+1] [L43] i++ VAL [i=8, ret=338399065, ret2=338399065, temp=3616211188, x={1:0}] [L43] COND TRUE i<20 -1 [L44] EXPR, FCALL x[i+1] [L44] FCALL x[i] = x[i+1] [L43] i++ VAL [i=9, ret=338399065, ret2=338399065, temp=3616211188, x={1:0}] [L43] COND TRUE i<20 -1 [L44] EXPR, FCALL x[i+1] [L44] FCALL x[i] = x[i+1] [L43] i++ VAL [i=10, ret=338399065, ret2=338399065, temp=3616211188, x={1:0}] [L43] COND TRUE i<20 -1 [L44] EXPR, FCALL x[i+1] [L44] FCALL x[i] = x[i+1] [L43] i++ VAL [i=11, ret=338399065, ret2=338399065, temp=3616211188, x={1:0}] [L43] COND TRUE i<20 -1 [L44] EXPR, FCALL x[i+1] [L44] FCALL x[i] = x[i+1] [L43] i++ VAL [i=12, ret=338399065, ret2=338399065, temp=3616211188, x={1:0}] [L43] COND TRUE i<20 -1 [L44] EXPR, FCALL x[i+1] [L44] FCALL x[i] = x[i+1] [L43] i++ VAL [i=13, ret=338399065, ret2=338399065, temp=3616211188, x={1:0}] [L43] COND TRUE i<20 -1 [L44] EXPR, FCALL x[i+1] [L44] FCALL x[i] = x[i+1] [L43] i++ VAL [i=14, ret=338399065, ret2=338399065, temp=3616211188, x={1:0}] [L43] COND TRUE i<20 -1 [L44] EXPR, FCALL x[i+1] [L44] FCALL x[i] = x[i+1] [L43] i++ VAL [i=15, ret=338399065, ret2=338399065, temp=3616211188, x={1:0}] [L43] COND TRUE i<20 -1 [L44] EXPR, FCALL x[i+1] [L44] FCALL x[i] = x[i+1] [L43] i++ VAL [i=16, ret=338399065, ret2=338399065, temp=3616211188, x={1:0}] [L43] COND TRUE i<20 -1 [L44] EXPR, FCALL x[i+1] [L44] FCALL x[i] = x[i+1] [L43] i++ VAL [i=17, ret=338399065, ret2=338399065, temp=3616211188, x={1:0}] [L43] COND TRUE i<20 -1 [L44] EXPR, FCALL x[i+1] [L44] FCALL x[i] = x[i+1] [L43] i++ VAL [i=18, ret=338399065, ret2=338399065, temp=3616211188, x={1:0}] [L43] COND TRUE i<20 -1 [L44] EXPR, FCALL x[i+1] [L44] FCALL x[i] = x[i+1] [L43] i++ VAL [i=19, ret=338399065, ret2=338399065, temp=3616211188, x={1:0}] [L43] COND FALSE !(i<20 -1) VAL [i=19, ret=338399065, ret2=338399065, temp=3616211188, x={1:0}] [L46] FCALL x[20 -1] = temp VAL [i=19, ret=338399065, ret2=338399065, temp=3616211188, x={1:0}] [L47] CALL, EXPR rangesum(x) VAL [x={1:0}] [L13] int i; [L14] long long ret; [L15] ret = 0 [L16] int cnt = 0; [L17] i = 0 VAL [cnt=0, i=0, ret=0, x={1:0}, x={1:0}] [L17] COND TRUE i < 20 VAL [cnt=0, i=0, ret=0, x={1:0}, x={1:0}] [L18] COND FALSE !(i > 20/2) VAL [cnt=0, i=0, ret=0, x={1:0}, x={1:0}] [L17] i++ VAL [cnt=0, i=1, ret=0, x={1:0}, x={1:0}] [L17] COND TRUE i < 20 VAL [cnt=0, i=1, ret=0, x={1:0}, x={1:0}] [L18] COND FALSE !(i > 20/2) VAL [cnt=0, i=1, ret=0, x={1:0}, x={1:0}] [L17] i++ VAL [cnt=0, i=2, ret=0, x={1:0}, x={1:0}] [L17] COND TRUE i < 20 VAL [cnt=0, i=2, ret=0, x={1:0}, x={1:0}] [L18] COND FALSE !(i > 20/2) VAL [cnt=0, i=2, ret=0, x={1:0}, x={1:0}] [L17] i++ VAL [cnt=0, i=3, ret=0, x={1:0}, x={1:0}] [L17] COND TRUE i < 20 VAL [cnt=0, i=3, ret=0, x={1:0}, x={1:0}] [L18] COND FALSE !(i > 20/2) VAL [cnt=0, i=3, ret=0, x={1:0}, x={1:0}] [L17] i++ VAL [cnt=0, i=4, ret=0, x={1:0}, x={1:0}] [L17] COND TRUE i < 20 VAL [cnt=0, i=4, ret=0, x={1:0}, x={1:0}] [L18] COND FALSE !(i > 20/2) VAL [cnt=0, i=4, ret=0, x={1:0}, x={1:0}] [L17] i++ VAL [cnt=0, i=5, ret=0, x={1:0}, x={1:0}] [L17] COND TRUE i < 20 VAL [cnt=0, i=5, ret=0, x={1:0}, x={1:0}] [L18] COND FALSE !(i > 20/2) VAL [cnt=0, i=5, ret=0, x={1:0}, x={1:0}] [L17] i++ VAL [cnt=0, i=6, ret=0, x={1:0}, x={1:0}] [L17] COND TRUE i < 20 VAL [cnt=0, i=6, ret=0, x={1:0}, x={1:0}] [L18] COND FALSE !(i > 20/2) VAL [cnt=0, i=6, ret=0, x={1:0}, x={1:0}] [L17] i++ VAL [cnt=0, i=7, ret=0, x={1:0}, x={1:0}] [L17] COND TRUE i < 20 VAL [cnt=0, i=7, ret=0, x={1:0}, x={1:0}] [L18] COND FALSE !(i > 20/2) VAL [cnt=0, i=7, ret=0, x={1:0}, x={1:0}] [L17] i++ VAL [cnt=0, i=8, ret=0, x={1:0}, x={1:0}] [L17] COND TRUE i < 20 VAL [cnt=0, i=8, ret=0, x={1:0}, x={1:0}] [L18] COND FALSE !(i > 20/2) VAL [cnt=0, i=8, ret=0, x={1:0}, x={1:0}] [L17] i++ VAL [cnt=0, i=9, ret=0, x={1:0}, x={1:0}] [L17] COND TRUE i < 20 VAL [cnt=0, i=9, ret=0, x={1:0}, x={1:0}] [L18] COND FALSE !(i > 20/2) VAL [cnt=0, i=9, ret=0, x={1:0}, x={1:0}] [L17] i++ VAL [cnt=0, i=10, ret=0, x={1:0}, x={1:0}] [L17] COND TRUE i < 20 VAL [cnt=0, i=10, ret=0, x={1:0}, x={1:0}] [L18] COND FALSE !(i > 20/2) VAL [cnt=0, i=10, ret=0, x={1:0}, x={1:0}] [L17] i++ VAL [cnt=0, i=11, ret=0, x={1:0}, x={1:0}] [L17] COND TRUE i < 20 VAL [cnt=0, i=11, ret=0, x={1:0}, x={1:0}] [L18] COND TRUE i > 20/2 [L19] EXPR, FCALL x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 VAL [cnt=1, i=11, ret=2146834143, x={1:0}, x={1:0}] [L17] i++ VAL [cnt=1, i=12, ret=2146834143, x={1:0}, x={1:0}] [L17] COND TRUE i < 20 VAL [cnt=1, i=12, ret=2146834143, x={1:0}, x={1:0}] [L18] COND TRUE i > 20/2 [L19] EXPR, FCALL x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 VAL [cnt=2, i=12, ret=1842563909, x={1:0}, x={1:0}] [L17] i++ VAL [cnt=2, i=13, ret=1842563909, x={1:0}, x={1:0}] [L17] COND TRUE i < 20 VAL [cnt=2, i=13, ret=1842563909, x={1:0}, x={1:0}] [L18] COND TRUE i > 20/2 [L19] EXPR, FCALL x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 VAL [cnt=3, i=13, ret=1632698647, x={1:0}, x={1:0}] [L17] i++ VAL [cnt=3, i=14, ret=1632698647, x={1:0}, x={1:0}] [L17] COND TRUE i < 20 VAL [cnt=3, i=14, ret=1632698647, x={1:0}, x={1:0}] [L18] COND TRUE i > 20/2 [L19] EXPR, FCALL x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 VAL [cnt=4, i=14, ret=1103115678, x={1:0}, x={1:0}] [L17] i++ VAL [cnt=4, i=15, ret=1103115678, x={1:0}, x={1:0}] [L17] COND TRUE i < 20 VAL [cnt=4, i=15, ret=1103115678, x={1:0}, x={1:0}] [L18] COND TRUE i > 20/2 [L19] EXPR, FCALL x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 VAL [cnt=5, i=15, ret=616507973, x={1:0}, x={1:0}] [L17] i++ VAL [cnt=5, i=16, ret=616507973, x={1:0}, x={1:0}] [L17] COND TRUE i < 20 VAL [cnt=5, i=16, ret=616507973, x={1:0}, x={1:0}] [L18] COND TRUE i > 20/2 [L19] EXPR, FCALL x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 VAL [cnt=6, i=16, ret=2271675068, x={1:0}, x={1:0}] [L17] i++ VAL [cnt=6, i=17, ret=2271675068, x={1:0}, x={1:0}] [L17] COND TRUE i < 20 VAL [cnt=6, i=17, ret=2271675068, x={1:0}, x={1:0}] [L18] COND TRUE i > 20/2 [L19] EXPR, FCALL x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 VAL [cnt=7, i=17, ret=763821279, x={1:0}, x={1:0}] [L17] i++ VAL [cnt=7, i=18, ret=763821279, x={1:0}, x={1:0}] [L17] COND TRUE i < 20 VAL [cnt=7, i=18, ret=763821279, x={1:0}, x={1:0}] [L18] COND TRUE i > 20/2 [L19] EXPR, FCALL x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 VAL [cnt=8, i=18, ret=957807718, x={1:0}, x={1:0}] [L17] i++ VAL [cnt=8, i=19, ret=957807718, x={1:0}, x={1:0}] [L17] COND TRUE i < 20 VAL [cnt=8, i=19, ret=957807718, x={1:0}, x={1:0}] [L18] COND TRUE i > 20/2 [L19] EXPR, FCALL x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 VAL [cnt=9, i=19, ret=279051610, x={1:0}, x={1:0}] [L17] i++ VAL [cnt=9, i=20, ret=279051610, x={1:0}, x={1:0}] [L17] COND FALSE !(i < 20) VAL [cnt=9, i=20, ret=279051610, x={1:0}, x={1:0}] [L23] COND TRUE cnt !=0 [L24] RET return ret / cnt; VAL [\result=31005734, cnt=9, i=20, ret=279051610, x={1:0}, x={1:0}] [L47] EXPR rangesum(x) VAL [i=19, rangesum(x)=31005734, ret=338399065, ret2=338399065, temp=3616211188, x={1:0}] [L47] ret5 = rangesum(x) [L49] COND TRUE ret != ret2 || ret !=ret5 VAL [i=19, ret=338399065, ret2=338399065, ret5=31005734, temp=3616211188, x={1:0}] [L50] __VERIFIER_error() VAL [i=19, ret=338399065, ret2=338399065, ret5=31005734, temp=3616211188, x={1:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 40 locations, 1 error locations. UNSAFE Result, 429.9s OverallTime, 13 OverallIterations, 63 TraceHistogramMax, 11.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 518 SDtfs, 498 SDslu, 3666 SDs, 0 SdLazy, 2416 SolverSat, 287 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5754 GetRequests, 5517 SyntacticMatches, 6 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 893 ImplicationChecksByTransitivity, 13.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=332occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 12 MinimizatonAttempts, 29 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 391.8s SatisfiabilityAnalysisTime, 7.7s InterpolantComputationTime, 3532 NumberOfCodeBlocks, 2953 NumberOfCodeBlocksAsserted, 49 NumberOfCheckSat, 5683 ConstructedInterpolants, 0 QuantifiedInterpolants, 2065706 SizeOfPredicates, 20 NumberOfNonLiveVariables, 3977 ConjunctsInSsa, 136 ConjunctsInUnsatCore, 33 InterpolantComputations, 7 PerfectInterpolantSequences, 66888/72792 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...