./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/reducercommutativity/rangesum05_false-unreach-call_true-termination.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0cd3be1d Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_572b1d8f-94e4-40e7-89c5-5d6f68d717f6/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_572b1d8f-94e4-40e7-89c5-5d6f68d717f6/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_572b1d8f-94e4-40e7-89c5-5d6f68d717f6/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_572b1d8f-94e4-40e7-89c5-5d6f68d717f6/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/reducercommutativity/rangesum05_false-unreach-call_true-termination.i -s /tmp/vcloud-vcloud-master/worker/working_dir_572b1d8f-94e4-40e7-89c5-5d6f68d717f6/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_572b1d8f-94e4-40e7-89c5-5d6f68d717f6/bin-2019/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1633e43e3f340ce4ae371cafc3d1ea0a9dad5739 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 0.1.23-0cd3be1 [2018-11-28 13:10:16,975 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-28 13:10:16,976 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-28 13:10:16,984 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-28 13:10:16,984 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-28 13:10:16,985 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-28 13:10:16,985 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-28 13:10:16,986 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-28 13:10:16,987 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-28 13:10:16,988 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-28 13:10:16,989 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-28 13:10:16,989 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-28 13:10:16,989 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-28 13:10:16,990 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-28 13:10:16,991 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-28 13:10:16,991 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-28 13:10:16,992 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-28 13:10:16,993 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-28 13:10:16,995 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-28 13:10:16,996 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-28 13:10:16,996 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-28 13:10:16,997 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-28 13:10:16,999 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-28 13:10:16,999 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-28 13:10:16,999 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-28 13:10:17,000 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-28 13:10:17,001 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-28 13:10:17,001 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-28 13:10:17,002 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-28 13:10:17,002 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-28 13:10:17,003 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-28 13:10:17,003 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-28 13:10:17,003 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-28 13:10:17,003 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-28 13:10:17,004 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-28 13:10:17,004 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-28 13:10:17,005 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_572b1d8f-94e4-40e7-89c5-5d6f68d717f6/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-11-28 13:10:17,014 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-28 13:10:17,014 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-28 13:10:17,015 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-28 13:10:17,015 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-11-28 13:10:17,015 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-28 13:10:17,016 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-28 13:10:17,016 INFO L133 SettingsManager]: * Use SBE=true [2018-11-28 13:10:17,016 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-28 13:10:17,016 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-28 13:10:17,016 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-28 13:10:17,016 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-28 13:10:17,016 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-28 13:10:17,017 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-28 13:10:17,017 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-28 13:10:17,017 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-28 13:10:17,017 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-28 13:10:17,017 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-28 13:10:17,017 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-28 13:10:17,017 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-28 13:10:17,017 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-28 13:10:17,018 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-28 13:10:17,018 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-28 13:10:17,018 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-28 13:10:17,018 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-28 13:10:17,018 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-28 13:10:17,018 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-28 13:10:17,018 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-28 13:10:17,018 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-28 13:10:17,018 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-28 13:10:17,018 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-28 13:10:17,019 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_572b1d8f-94e4-40e7-89c5-5d6f68d717f6/bin-2019/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1633e43e3f340ce4ae371cafc3d1ea0a9dad5739 [2018-11-28 13:10:17,042 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-28 13:10:17,049 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-28 13:10:17,051 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-28 13:10:17,052 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-28 13:10:17,053 INFO L276 PluginConnector]: CDTParser initialized [2018-11-28 13:10:17,053 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_572b1d8f-94e4-40e7-89c5-5d6f68d717f6/bin-2019/uautomizer/../../sv-benchmarks/c/reducercommutativity/rangesum05_false-unreach-call_true-termination.i [2018-11-28 13:10:17,089 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_572b1d8f-94e4-40e7-89c5-5d6f68d717f6/bin-2019/uautomizer/data/89bcfe523/5e8f0fd957ef4e61b5616355275a60ae/FLAG47fd0f756 [2018-11-28 13:10:17,496 INFO L307 CDTParser]: Found 1 translation units. [2018-11-28 13:10:17,497 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_572b1d8f-94e4-40e7-89c5-5d6f68d717f6/sv-benchmarks/c/reducercommutativity/rangesum05_false-unreach-call_true-termination.i [2018-11-28 13:10:17,501 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_572b1d8f-94e4-40e7-89c5-5d6f68d717f6/bin-2019/uautomizer/data/89bcfe523/5e8f0fd957ef4e61b5616355275a60ae/FLAG47fd0f756 [2018-11-28 13:10:17,509 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_572b1d8f-94e4-40e7-89c5-5d6f68d717f6/bin-2019/uautomizer/data/89bcfe523/5e8f0fd957ef4e61b5616355275a60ae [2018-11-28 13:10:17,511 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-28 13:10:17,512 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-28 13:10:17,513 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-28 13:10:17,513 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-28 13:10:17,516 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-28 13:10:17,516 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 01:10:17" (1/1) ... [2018-11-28 13:10:17,518 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7945adaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:10:17, skipping insertion in model container [2018-11-28 13:10:17,518 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 01:10:17" (1/1) ... [2018-11-28 13:10:17,523 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-28 13:10:17,534 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-28 13:10:17,636 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 13:10:17,641 INFO L191 MainTranslator]: Completed pre-run [2018-11-28 13:10:17,655 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 13:10:17,664 INFO L195 MainTranslator]: Completed translation [2018-11-28 13:10:17,664 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:10:17 WrapperNode [2018-11-28 13:10:17,664 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-28 13:10:17,665 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-28 13:10:17,665 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-28 13:10:17,665 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-28 13:10:17,670 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:10:17" (1/1) ... [2018-11-28 13:10:17,675 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:10:17" (1/1) ... [2018-11-28 13:10:17,681 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-28 13:10:17,682 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-28 13:10:17,682 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-28 13:10:17,682 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-28 13:10:17,724 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:10:17" (1/1) ... [2018-11-28 13:10:17,724 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:10:17" (1/1) ... [2018-11-28 13:10:17,726 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:10:17" (1/1) ... [2018-11-28 13:10:17,726 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:10:17" (1/1) ... [2018-11-28 13:10:17,733 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:10:17" (1/1) ... [2018-11-28 13:10:17,736 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:10:17" (1/1) ... [2018-11-28 13:10:17,737 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:10:17" (1/1) ... [2018-11-28 13:10:17,738 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-28 13:10:17,738 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-28 13:10:17,738 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-28 13:10:17,738 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-28 13:10:17,739 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:10:17" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_572b1d8f-94e4-40e7-89c5-5d6f68d717f6/bin-2019/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-28 13:10:17,773 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-11-28 13:10:17,773 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-28 13:10:17,773 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-28 13:10:17,773 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-11-28 13:10:17,773 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-28 13:10:17,773 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-28 13:10:17,774 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2018-11-28 13:10:17,774 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-28 13:10:17,774 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-28 13:10:17,774 INFO L130 BoogieDeclarations]: Found specification of procedure rangesum [2018-11-28 13:10:17,774 INFO L138 BoogieDeclarations]: Found implementation of procedure rangesum [2018-11-28 13:10:17,774 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-11-28 13:10:17,774 INFO L130 BoogieDeclarations]: Found specification of procedure init_nondet [2018-11-28 13:10:17,774 INFO L138 BoogieDeclarations]: Found implementation of procedure init_nondet [2018-11-28 13:10:17,977 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-28 13:10:17,977 INFO L280 CfgBuilder]: Removed 3 assue(true) statements. [2018-11-28 13:10:17,977 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 01:10:17 BoogieIcfgContainer [2018-11-28 13:10:17,978 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-28 13:10:17,978 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-28 13:10:17,978 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-28 13:10:17,981 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-28 13:10:17,982 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 01:10:17" (1/3) ... [2018-11-28 13:10:17,982 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53b8b2c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 01:10:17, skipping insertion in model container [2018-11-28 13:10:17,983 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:10:17" (2/3) ... [2018-11-28 13:10:17,983 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53b8b2c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 01:10:17, skipping insertion in model container [2018-11-28 13:10:17,983 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 01:10:17" (3/3) ... [2018-11-28 13:10:17,984 INFO L112 eAbstractionObserver]: Analyzing ICFG rangesum05_false-unreach-call_true-termination.i [2018-11-28 13:10:17,994 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-28 13:10:18,001 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-28 13:10:18,016 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-28 13:10:18,036 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-28 13:10:18,037 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-28 13:10:18,037 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-28 13:10:18,037 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-28 13:10:18,037 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-28 13:10:18,037 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-28 13:10:18,037 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-28 13:10:18,037 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-28 13:10:18,038 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-28 13:10:18,049 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2018-11-28 13:10:18,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-11-28 13:10:18,054 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:10:18,055 INFO L402 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] [2018-11-28 13:10:18,057 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:10:18,062 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:10:18,062 INFO L82 PathProgramCache]: Analyzing trace with hash -332770493, now seen corresponding path program 1 times [2018-11-28 13:10:18,064 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:10:18,064 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:10:18,103 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:10:18,103 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:10:18,103 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:10:18,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:10:18,163 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2018-11-28 13:10:18,164 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:10:18,164 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_572b1d8f-94e4-40e7-89c5-5d6f68d717f6/bin-2019/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 13:10:18,184 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:10:18,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:10:18,228 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:10:18,243 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-11-28 13:10:18,259 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 13:10:18,259 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-28 13:10:18,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-28 13:10:18,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-28 13:10:18,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-28 13:10:18,271 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 2 states. [2018-11-28 13:10:18,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:10:18,285 INFO L93 Difference]: Finished difference Result 64 states and 85 transitions. [2018-11-28 13:10:18,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-28 13:10:18,286 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 37 [2018-11-28 13:10:18,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:10:18,291 INFO L225 Difference]: With dead ends: 64 [2018-11-28 13:10:18,291 INFO L226 Difference]: Without dead ends: 32 [2018-11-28 13:10:18,294 INFO L631 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 [2018-11-28 13:10:18,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-11-28 13:10:18,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-11-28 13:10:18,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-11-28 13:10:18,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2018-11-28 13:10:18,321 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 37 [2018-11-28 13:10:18,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:10:18,322 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2018-11-28 13:10:18,322 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-28 13:10:18,322 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2018-11-28 13:10:18,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-11-28 13:10:18,324 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:10:18,324 INFO L402 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] [2018-11-28 13:10:18,325 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:10:18,325 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:10:18,325 INFO L82 PathProgramCache]: Analyzing trace with hash -991975144, now seen corresponding path program 1 times [2018-11-28 13:10:18,325 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:10:18,325 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:10:18,326 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:10:18,326 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:10:18,326 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:10:18,338 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-28 13:10:18,338 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-28 13:10:18,338 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_572b1d8f-94e4-40e7-89c5-5d6f68d717f6/bin-2019/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-11-28 13:10:18,354 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:10:18,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:10:18,385 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:10:18,428 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-28 13:10:18,452 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 13:10:18,452 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-28 13:10:18,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-28 13:10:18,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-28 13:10:18,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-28 13:10:18,454 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand 3 states. [2018-11-28 13:10:18,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:10:18,468 INFO L93 Difference]: Finished difference Result 56 states and 68 transitions. [2018-11-28 13:10:18,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-28 13:10:18,469 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 37 [2018-11-28 13:10:18,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:10:18,470 INFO L225 Difference]: With dead ends: 56 [2018-11-28 13:10:18,470 INFO L226 Difference]: Without dead ends: 34 [2018-11-28 13:10:18,471 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-28 13:10:18,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-11-28 13:10:18,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2018-11-28 13:10:18,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-11-28 13:10:18,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2018-11-28 13:10:18,477 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 37 [2018-11-28 13:10:18,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:10:18,477 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2018-11-28 13:10:18,477 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-28 13:10:18,477 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2018-11-28 13:10:18,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-11-28 13:10:18,478 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:10:18,478 INFO L402 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, 1, 1] [2018-11-28 13:10:18,478 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:10:18,478 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:10:18,479 INFO L82 PathProgramCache]: Analyzing trace with hash 479004822, now seen corresponding path program 1 times [2018-11-28 13:10:18,479 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:10:18,479 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:10:18,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:10:18,480 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:10:18,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:10:18,492 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-28 13:10:18,492 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-28 13:10:18,492 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_572b1d8f-94e4-40e7-89c5-5d6f68d717f6/bin-2019/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-11-28 13:10:18,500 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:10:18,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:10:18,527 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:10:18,533 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-11-28 13:10:18,559 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 13:10:18,559 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-28 13:10:18,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-28 13:10:18,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-28 13:10:18,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-28 13:10:18,559 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand 3 states. [2018-11-28 13:10:18,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:10:18,578 INFO L93 Difference]: Finished difference Result 57 states and 75 transitions. [2018-11-28 13:10:18,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-28 13:10:18,578 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 39 [2018-11-28 13:10:18,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:10:18,579 INFO L225 Difference]: With dead ends: 57 [2018-11-28 13:10:18,580 INFO L226 Difference]: Without dead ends: 39 [2018-11-28 13:10:18,580 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-28 13:10:18,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-11-28 13:10:18,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2018-11-28 13:10:18,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-11-28 13:10:18,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2018-11-28 13:10:18,587 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 39 [2018-11-28 13:10:18,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:10:18,587 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2018-11-28 13:10:18,587 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-28 13:10:18,588 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2018-11-28 13:10:18,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-11-28 13:10:18,588 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:10:18,588 INFO L402 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, 1, 1] [2018-11-28 13:10:18,588 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:10:18,589 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:10:18,589 INFO L82 PathProgramCache]: Analyzing trace with hash -22870507, now seen corresponding path program 1 times [2018-11-28 13:10:18,589 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:10:18,589 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:10:18,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:10:18,589 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:10:18,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:10:18,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:10:18,626 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-11-28 13:10:18,627 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:10:18,627 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_572b1d8f-94e4-40e7-89c5-5d6f68d717f6/bin-2019/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 13:10:18,638 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:10:18,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:10:18,659 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:10:18,669 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-11-28 13:10:18,694 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-28 13:10:18,694 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2018-11-28 13:10:18,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-28 13:10:18,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-28 13:10:18,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-28 13:10:18,695 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand 4 states. [2018-11-28 13:10:18,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:10:18,716 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2018-11-28 13:10:18,716 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-28 13:10:18,716 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 39 [2018-11-28 13:10:18,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:10:18,717 INFO L225 Difference]: With dead ends: 62 [2018-11-28 13:10:18,717 INFO L226 Difference]: Without dead ends: 40 [2018-11-28 13:10:18,717 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-28 13:10:18,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-11-28 13:10:18,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2018-11-28 13:10:18,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-11-28 13:10:18,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2018-11-28 13:10:18,720 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 39 [2018-11-28 13:10:18,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:10:18,720 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2018-11-28 13:10:18,720 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-28 13:10:18,720 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2018-11-28 13:10:18,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-11-28 13:10:18,721 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:10:18,721 INFO L402 BasicCegarLoop]: trace histogram [3, 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, 1, 1] [2018-11-28 13:10:18,721 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:10:18,721 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:10:18,722 INFO L82 PathProgramCache]: Analyzing trace with hash 496221539, now seen corresponding path program 1 times [2018-11-28 13:10:18,722 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:10:18,722 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:10:18,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:10:18,722 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:10:18,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:10:18,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:10:18,748 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-11-28 13:10:18,748 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:10:18,748 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_572b1d8f-94e4-40e7-89c5-5d6f68d717f6/bin-2019/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 13:10:18,754 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:10:18,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:10:18,780 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:10:18,801 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-11-28 13:10:18,826 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-28 13:10:18,826 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2018-11-28 13:10:18,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-28 13:10:18,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-28 13:10:18,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-11-28 13:10:18,827 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand 5 states. [2018-11-28 13:10:18,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:10:18,899 INFO L93 Difference]: Finished difference Result 68 states and 88 transitions. [2018-11-28 13:10:18,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-28 13:10:18,899 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 48 [2018-11-28 13:10:18,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:10:18,900 INFO L225 Difference]: With dead ends: 68 [2018-11-28 13:10:18,900 INFO L226 Difference]: Without dead ends: 44 [2018-11-28 13:10:18,901 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-11-28 13:10:18,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-11-28 13:10:18,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 38. [2018-11-28 13:10:18,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-11-28 13:10:18,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2018-11-28 13:10:18,906 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 48 [2018-11-28 13:10:18,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:10:18,906 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2018-11-28 13:10:18,906 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-28 13:10:18,906 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2018-11-28 13:10:18,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-11-28 13:10:18,907 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:10:18,907 INFO L402 BasicCegarLoop]: trace histogram [6, 6, 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, 1, 1, 1, 1] [2018-11-28 13:10:18,908 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:10:18,908 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:10:18,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1681907214, now seen corresponding path program 1 times [2018-11-28 13:10:18,908 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:10:18,908 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:10:18,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:10:18,909 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:10:18,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:10:18,918 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-28 13:10:18,919 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-28 13:10:18,919 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_572b1d8f-94e4-40e7-89c5-5d6f68d717f6/bin-2019/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-11-28 13:10:18,930 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:10:18,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:10:18,963 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:10:19,001 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2018-11-28 13:10:19,017 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-28 13:10:19,017 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2018-11-28 13:10:19,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-28 13:10:19,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-28 13:10:19,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-28 13:10:19,018 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand 4 states. [2018-11-28 13:10:19,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:10:19,033 INFO L93 Difference]: Finished difference Result 68 states and 80 transitions. [2018-11-28 13:10:19,033 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-28 13:10:19,034 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 59 [2018-11-28 13:10:19,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:10:19,034 INFO L225 Difference]: With dead ends: 68 [2018-11-28 13:10:19,034 INFO L226 Difference]: Without dead ends: 41 [2018-11-28 13:10:19,035 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-28 13:10:19,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-11-28 13:10:19,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2018-11-28 13:10:19,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-11-28 13:10:19,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2018-11-28 13:10:19,041 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 59 [2018-11-28 13:10:19,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:10:19,041 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2018-11-28 13:10:19,041 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-28 13:10:19,041 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2018-11-28 13:10:19,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-11-28 13:10:19,042 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:10:19,042 INFO L402 BasicCegarLoop]: trace histogram [6, 6, 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] [2018-11-28 13:10:19,042 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:10:19,043 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:10:19,043 INFO L82 PathProgramCache]: Analyzing trace with hash 804630256, now seen corresponding path program 2 times [2018-11-28 13:10:19,043 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:10:19,043 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:10:19,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:10:19,044 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:10:19,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:10:19,053 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-28 13:10:19,053 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-28 13:10:19,053 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_572b1d8f-94e4-40e7-89c5-5d6f68d717f6/bin-2019/uautomizer/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 [2018-11-28 13:10:19,071 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 13:10:19,105 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 13:10:19,105 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:10:19,108 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:10:19,132 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2018-11-28 13:10:19,147 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-28 13:10:19,147 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2018-11-28 13:10:19,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-28 13:10:19,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-28 13:10:19,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-11-28 13:10:19,148 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand 5 states. [2018-11-28 13:10:19,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:10:19,159 INFO L93 Difference]: Finished difference Result 70 states and 82 transitions. [2018-11-28 13:10:19,159 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-28 13:10:19,160 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 61 [2018-11-28 13:10:19,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:10:19,160 INFO L225 Difference]: With dead ends: 70 [2018-11-28 13:10:19,160 INFO L226 Difference]: Without dead ends: 43 [2018-11-28 13:10:19,161 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-11-28 13:10:19,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-11-28 13:10:19,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2018-11-28 13:10:19,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-11-28 13:10:19,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2018-11-28 13:10:19,165 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 61 [2018-11-28 13:10:19,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:10:19,165 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2018-11-28 13:10:19,165 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-28 13:10:19,165 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2018-11-28 13:10:19,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-11-28 13:10:19,166 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:10:19,166 INFO L402 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 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, 1, 1] [2018-11-28 13:10:19,166 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:10:19,166 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:10:19,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1929644946, now seen corresponding path program 3 times [2018-11-28 13:10:19,166 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:10:19,166 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:10:19,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:10:19,167 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:10:19,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:10:19,175 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-28 13:10:19,175 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-28 13:10:19,176 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_572b1d8f-94e4-40e7-89c5-5d6f68d717f6/bin-2019/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-11-28 13:10:19,189 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 13:10:19,212 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-11-28 13:10:19,212 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:10:19,214 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:10:19,266 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2018-11-28 13:10:19,280 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-28 13:10:19,281 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2018-11-28 13:10:19,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-28 13:10:19,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-28 13:10:19,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-11-28 13:10:19,282 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand 5 states. [2018-11-28 13:10:19,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:10:19,299 INFO L93 Difference]: Finished difference Result 68 states and 83 transitions. [2018-11-28 13:10:19,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-28 13:10:19,300 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2018-11-28 13:10:19,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:10:19,300 INFO L225 Difference]: With dead ends: 68 [2018-11-28 13:10:19,301 INFO L226 Difference]: Without dead ends: 45 [2018-11-28 13:10:19,301 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-11-28 13:10:19,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-11-28 13:10:19,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-11-28 13:10:19,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-11-28 13:10:19,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2018-11-28 13:10:19,307 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 63 [2018-11-28 13:10:19,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:10:19,307 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2018-11-28 13:10:19,307 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-28 13:10:19,307 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2018-11-28 13:10:19,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-11-28 13:10:19,309 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:10:19,309 INFO L402 BasicCegarLoop]: trace histogram [9, 9, 6, 3, 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, 1, 1] [2018-11-28 13:10:19,310 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:10:19,310 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:10:19,310 INFO L82 PathProgramCache]: Analyzing trace with hash -575638740, now seen corresponding path program 4 times [2018-11-28 13:10:19,310 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:10:19,310 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:10:19,311 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:10:19,311 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:10:19,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:10:19,322 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-28 13:10:19,322 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-28 13:10:19,322 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_572b1d8f-94e4-40e7-89c5-5d6f68d717f6/bin-2019/uautomizer/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 [2018-11-28 13:10:19,329 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 13:10:19,349 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 13:10:19,349 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:10:19,351 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:10:19,391 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2018-11-28 13:10:19,405 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-28 13:10:19,406 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2018-11-28 13:10:19,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-28 13:10:19,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-28 13:10:19,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-11-28 13:10:19,407 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand 6 states. [2018-11-28 13:10:19,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:10:19,424 INFO L93 Difference]: Finished difference Result 78 states and 92 transitions. [2018-11-28 13:10:19,425 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-28 13:10:19,425 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 72 [2018-11-28 13:10:19,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:10:19,425 INFO L225 Difference]: With dead ends: 78 [2018-11-28 13:10:19,426 INFO L226 Difference]: Without dead ends: 48 [2018-11-28 13:10:19,426 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-11-28 13:10:19,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-11-28 13:10:19,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2018-11-28 13:10:19,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-11-28 13:10:19,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2018-11-28 13:10:19,430 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 72 [2018-11-28 13:10:19,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:10:19,431 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2018-11-28 13:10:19,431 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-28 13:10:19,431 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2018-11-28 13:10:19,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-11-28 13:10:19,432 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:10:19,432 INFO L402 BasicCegarLoop]: trace histogram [9, 9, 6, 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, 1, 1] [2018-11-28 13:10:19,432 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:10:19,432 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:10:19,432 INFO L82 PathProgramCache]: Analyzing trace with hash -336825618, now seen corresponding path program 5 times [2018-11-28 13:10:19,432 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:10:19,433 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:10:19,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:10:19,433 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:10:19,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:10:19,440 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-28 13:10:19,441 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-28 13:10:19,441 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_572b1d8f-94e4-40e7-89c5-5d6f68d717f6/bin-2019/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-11-28 13:10:19,446 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-28 13:10:19,484 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-11-28 13:10:19,484 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:10:19,486 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:10:19,494 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 101 proven. 2 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2018-11-28 13:10:19,508 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-28 13:10:19,508 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2018-11-28 13:10:19,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-28 13:10:19,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-28 13:10:19,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-28 13:10:19,509 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand 4 states. [2018-11-28 13:10:19,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:10:19,530 INFO L93 Difference]: Finished difference Result 77 states and 93 transitions. [2018-11-28 13:10:19,531 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-28 13:10:19,531 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 74 [2018-11-28 13:10:19,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:10:19,531 INFO L225 Difference]: With dead ends: 77 [2018-11-28 13:10:19,531 INFO L226 Difference]: Without dead ends: 51 [2018-11-28 13:10:19,532 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-28 13:10:19,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-11-28 13:10:19,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2018-11-28 13:10:19,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-11-28 13:10:19,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2018-11-28 13:10:19,537 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 74 [2018-11-28 13:10:19,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:10:19,537 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2018-11-28 13:10:19,537 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-28 13:10:19,537 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2018-11-28 13:10:19,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-11-28 13:10:19,538 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:10:19,539 INFO L402 BasicCegarLoop]: trace histogram [12, 12, 6, 6, 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, 1, 1] [2018-11-28 13:10:19,539 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:10:19,539 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:10:19,539 INFO L82 PathProgramCache]: Analyzing trace with hash -1535873938, now seen corresponding path program 6 times [2018-11-28 13:10:19,539 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:10:19,539 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:10:19,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:10:19,540 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:10:19,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:10:19,548 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-28 13:10:19,548 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-28 13:10:19,549 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_572b1d8f-94e4-40e7-89c5-5d6f68d717f6/bin-2019/uautomizer/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 [2018-11-28 13:10:19,558 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-28 13:10:19,614 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-11-28 13:10:19,615 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:10:19,617 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:10:19,645 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 122 proven. 1 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2018-11-28 13:10:19,660 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-28 13:10:19,660 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2018-11-28 13:10:19,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-28 13:10:19,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-28 13:10:19,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-28 13:10:19,661 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand 4 states. [2018-11-28 13:10:19,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:10:19,671 INFO L93 Difference]: Finished difference Result 76 states and 87 transitions. [2018-11-28 13:10:19,671 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-28 13:10:19,671 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 83 [2018-11-28 13:10:19,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:10:19,672 INFO L225 Difference]: With dead ends: 76 [2018-11-28 13:10:19,672 INFO L226 Difference]: Without dead ends: 53 [2018-11-28 13:10:19,673 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-28 13:10:19,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-11-28 13:10:19,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2018-11-28 13:10:19,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-11-28 13:10:19,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2018-11-28 13:10:19,676 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 83 [2018-11-28 13:10:19,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:10:19,676 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2018-11-28 13:10:19,676 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-28 13:10:19,676 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2018-11-28 13:10:19,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-11-28 13:10:19,679 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:10:19,679 INFO L402 BasicCegarLoop]: trace histogram [12, 12, 6, 6, 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] [2018-11-28 13:10:19,679 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:10:19,680 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:10:19,680 INFO L82 PathProgramCache]: Analyzing trace with hash -2064866548, now seen corresponding path program 7 times [2018-11-28 13:10:19,680 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:10:19,680 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:10:19,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:10:19,681 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:10:19,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:10:19,690 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-28 13:10:19,690 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-28 13:10:19,690 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_572b1d8f-94e4-40e7-89c5-5d6f68d717f6/bin-2019/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-11-28 13:10:19,704 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:10:19,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:10:19,736 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:10:19,771 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2018-11-28 13:10:19,788 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-28 13:10:19,788 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2018-11-28 13:10:19,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-28 13:10:19,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-28 13:10:19,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-11-28 13:10:19,789 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand 7 states. [2018-11-28 13:10:19,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:10:19,806 INFO L93 Difference]: Finished difference Result 89 states and 103 transitions. [2018-11-28 13:10:19,807 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-28 13:10:19,807 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 85 [2018-11-28 13:10:19,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:10:19,807 INFO L225 Difference]: With dead ends: 89 [2018-11-28 13:10:19,807 INFO L226 Difference]: Without dead ends: 54 [2018-11-28 13:10:19,808 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-11-28 13:10:19,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-11-28 13:10:19,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-11-28 13:10:19,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-11-28 13:10:19,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2018-11-28 13:10:19,810 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 85 [2018-11-28 13:10:19,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:10:19,810 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2018-11-28 13:10:19,810 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-28 13:10:19,810 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2018-11-28 13:10:19,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-11-28 13:10:19,811 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:10:19,811 INFO L402 BasicCegarLoop]: trace histogram [12, 12, 6, 6, 5, 5, 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] [2018-11-28 13:10:19,811 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:10:19,811 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:10:19,811 INFO L82 PathProgramCache]: Analyzing trace with hash -998650230, now seen corresponding path program 8 times [2018-11-28 13:10:19,811 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:10:19,811 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:10:19,812 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:10:19,812 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:10:19,812 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:10:19,818 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-28 13:10:19,818 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-28 13:10:19,818 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_572b1d8f-94e4-40e7-89c5-5d6f68d717f6/bin-2019/uautomizer/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 [2018-11-28 13:10:19,824 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 13:10:19,845 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 13:10:19,845 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:10:19,847 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:10:19,858 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 85 proven. 7 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2018-11-28 13:10:19,873 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-28 13:10:19,873 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2018-11-28 13:10:19,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-28 13:10:19,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-28 13:10:19,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-11-28 13:10:19,874 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand 5 states. [2018-11-28 13:10:19,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:10:19,891 INFO L93 Difference]: Finished difference Result 88 states and 104 transitions. [2018-11-28 13:10:19,892 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-28 13:10:19,892 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 87 [2018-11-28 13:10:19,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:10:19,893 INFO L225 Difference]: With dead ends: 88 [2018-11-28 13:10:19,893 INFO L226 Difference]: Without dead ends: 57 [2018-11-28 13:10:19,894 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-11-28 13:10:19,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-11-28 13:10:19,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-11-28 13:10:19,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-11-28 13:10:19,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 64 transitions. [2018-11-28 13:10:19,902 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 64 transitions. Word has length 87 [2018-11-28 13:10:19,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:10:19,902 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 64 transitions. [2018-11-28 13:10:19,902 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-28 13:10:19,902 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 64 transitions. [2018-11-28 13:10:19,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-11-28 13:10:19,903 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:10:19,903 INFO L402 BasicCegarLoop]: trace histogram [15, 15, 9, 6, 5, 5, 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] [2018-11-28 13:10:19,903 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:10:19,903 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:10:19,904 INFO L82 PathProgramCache]: Analyzing trace with hash 1679580114, now seen corresponding path program 9 times [2018-11-28 13:10:19,904 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:10:19,904 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:10:19,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:10:19,904 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:10:19,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:10:19,913 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-28 13:10:19,913 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-28 13:10:19,913 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_572b1d8f-94e4-40e7-89c5-5d6f68d717f6/bin-2019/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-11-28 13:10:19,923 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 13:10:20,266 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-11-28 13:10:20,266 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:10:20,267 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:10:20,278 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 180 proven. 4 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2018-11-28 13:10:20,292 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-28 13:10:20,292 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2018-11-28 13:10:20,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-28 13:10:20,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-28 13:10:20,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-11-28 13:10:20,293 INFO L87 Difference]: Start difference. First operand 57 states and 64 transitions. Second operand 5 states. [2018-11-28 13:10:20,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:10:20,303 INFO L93 Difference]: Finished difference Result 86 states and 97 transitions. [2018-11-28 13:10:20,303 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-28 13:10:20,303 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 96 [2018-11-28 13:10:20,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:10:20,303 INFO L225 Difference]: With dead ends: 86 [2018-11-28 13:10:20,303 INFO L226 Difference]: Without dead ends: 60 [2018-11-28 13:10:20,304 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-11-28 13:10:20,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-11-28 13:10:20,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2018-11-28 13:10:20,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-11-28 13:10:20,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2018-11-28 13:10:20,307 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 96 [2018-11-28 13:10:20,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:10:20,307 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2018-11-28 13:10:20,307 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-28 13:10:20,307 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2018-11-28 13:10:20,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-11-28 13:10:20,307 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:10:20,307 INFO L402 BasicCegarLoop]: trace histogram [15, 15, 9, 6, 5, 5, 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] [2018-11-28 13:10:20,308 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:10:20,308 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:10:20,308 INFO L82 PathProgramCache]: Analyzing trace with hash 2078244212, now seen corresponding path program 10 times [2018-11-28 13:10:20,308 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:10:20,308 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:10:20,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:10:20,308 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:10:20,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:10:20,316 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-28 13:10:20,316 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-28 13:10:20,316 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_572b1d8f-94e4-40e7-89c5-5d6f68d717f6/bin-2019/uautomizer/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 [2018-11-28 13:10:20,330 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 13:10:20,356 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 13:10:20,356 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:10:20,358 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:10:20,372 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 180 proven. 9 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2018-11-28 13:10:20,386 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-28 13:10:20,386 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2018-11-28 13:10:20,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-28 13:10:20,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-28 13:10:20,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-11-28 13:10:20,387 INFO L87 Difference]: Start difference. First operand 59 states and 66 transitions. Second operand 6 states. [2018-11-28 13:10:20,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:10:20,402 INFO L93 Difference]: Finished difference Result 87 states and 98 transitions. [2018-11-28 13:10:20,402 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-28 13:10:20,402 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 98 [2018-11-28 13:10:20,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:10:20,403 INFO L225 Difference]: With dead ends: 87 [2018-11-28 13:10:20,403 INFO L226 Difference]: Without dead ends: 61 [2018-11-28 13:10:20,403 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-11-28 13:10:20,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-11-28 13:10:20,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-11-28 13:10:20,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-11-28 13:10:20,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 68 transitions. [2018-11-28 13:10:20,406 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 68 transitions. Word has length 98 [2018-11-28 13:10:20,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:10:20,406 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 68 transitions. [2018-11-28 13:10:20,407 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-28 13:10:20,407 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 68 transitions. [2018-11-28 13:10:20,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-11-28 13:10:20,407 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:10:20,407 INFO L402 BasicCegarLoop]: trace histogram [15, 15, 9, 6, 5, 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] [2018-11-28 13:10:20,407 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:10:20,408 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:10:20,408 INFO L82 PathProgramCache]: Analyzing trace with hash -1352614250, now seen corresponding path program 11 times [2018-11-28 13:10:20,408 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:10:20,408 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:10:20,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:10:20,409 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:10:20,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:10:20,414 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-28 13:10:20,414 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-28 13:10:20,414 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_572b1d8f-94e4-40e7-89c5-5d6f68d717f6/bin-2019/uautomizer/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-11-28 13:10:20,426 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-28 13:10:20,734 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-11-28 13:10:20,734 INFO L250 tOrderPrioritization]: Conjunction of SSA is sat [2018-11-28 13:10:20,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 13:10:20,848 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-11-28 13:10:20,896 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 01:10:20 BoogieIcfgContainer [2018-11-28 13:10:20,896 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-28 13:10:20,896 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-28 13:10:20,896 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-28 13:10:20,896 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-28 13:10:20,897 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 01:10:17" (3/4) ... [2018-11-28 13:10:20,898 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-11-28 13:10:20,965 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_572b1d8f-94e4-40e7-89c5-5d6f68d717f6/bin-2019/uautomizer/witness.graphml [2018-11-28 13:10:20,965 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-28 13:10:20,966 INFO L168 Benchmark]: Toolchain (without parser) took 3454.28 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 212.3 MB). Free memory was 954.4 MB in the beginning and 1.0 GB in the end (delta: -94.2 MB). Peak memory consumption was 118.2 MB. Max. memory is 11.5 GB. [2018-11-28 13:10:20,967 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 979.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 13:10:20,967 INFO L168 Benchmark]: CACSL2BoogieTranslator took 151.80 ms. Allocated memory is still 1.0 GB. Free memory was 954.4 MB in the beginning and 943.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-28 13:10:20,967 INFO L168 Benchmark]: Boogie Procedure Inliner took 16.93 ms. Allocated memory is still 1.0 GB. Free memory was 943.6 MB in the beginning and 941.0 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-28 13:10:20,968 INFO L168 Benchmark]: Boogie Preprocessor took 56.31 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 140.5 MB). Free memory was 941.0 MB in the beginning and 1.1 GB in the end (delta: -194.7 MB). Peak memory consumption was 12.9 MB. Max. memory is 11.5 GB. [2018-11-28 13:10:20,968 INFO L168 Benchmark]: RCFGBuilder took 239.41 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: 18.1 MB). Peak memory consumption was 18.1 MB. Max. memory is 11.5 GB. [2018-11-28 13:10:20,968 INFO L168 Benchmark]: TraceAbstraction took 2917.88 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 71.8 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 59.2 MB). Peak memory consumption was 131.1 MB. Max. memory is 11.5 GB. [2018-11-28 13:10:20,968 INFO L168 Benchmark]: Witness Printer took 69.02 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. [2018-11-28 13:10:20,970 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 979.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 151.80 ms. Allocated memory is still 1.0 GB. Free memory was 954.4 MB in the beginning and 943.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 16.93 ms. Allocated memory is still 1.0 GB. Free memory was 943.6 MB in the beginning and 941.0 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 56.31 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 140.5 MB). Free memory was 941.0 MB in the beginning and 1.1 GB in the end (delta: -194.7 MB). Peak memory consumption was 12.9 MB. Max. memory is 11.5 GB. * RCFGBuilder took 239.41 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: 18.1 MB). Peak memory consumption was 18.1 MB. Max. memory is 11.5 GB. * TraceAbstraction took 2917.88 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 71.8 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 59.2 MB). Peak memory consumption was 131.1 MB. Max. memory is 11.5 GB. * Witness Printer took 69.02 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 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] int x[5]; VAL [x={9:0}] [L32] CALL init_nondet(x) VAL [x={9:0}] [L5] int i; [L6] i = 0 VAL [i=0, x={9:0}, x={9:0}] [L6] COND TRUE i < 5 [L7] x[i] = __VERIFIER_nondet_int() [L6] i++ VAL [i=1, x={9:0}, x={9:0}] [L6] COND TRUE i < 5 [L7] x[i] = __VERIFIER_nondet_int() [L6] i++ VAL [i=2, x={9:0}, x={9:0}] [L6] COND TRUE i < 5 [L7] x[i] = __VERIFIER_nondet_int() [L6] i++ VAL [i=3, x={9:0}, x={9:0}] [L6] COND TRUE i < 5 [L7] x[i] = __VERIFIER_nondet_int() [L6] i++ VAL [i=4, x={9:0}, x={9:0}] [L6] COND TRUE i < 5 [L7] x[i] = __VERIFIER_nondet_int() [L6] i++ VAL [i=5, x={9:0}, x={9:0}] [L6] COND FALSE !(i < 5) VAL [i=5, x={9:0}, x={9:0}] [L32] RET init_nondet(x) VAL [x={9:0}] [L33] int temp; [L34] int ret; [L35] int ret2; [L36] int ret5; VAL [x={9:0}] [L38] CALL, EXPR rangesum(x) VAL [x={9:0}] [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={9:0}, x={9:0}] [L17] COND TRUE i < 5 VAL [cnt=0, i=0, ret=0, x={9:0}, x={9:0}] [L18] COND FALSE !(i > 5/2) VAL [cnt=0, i=0, ret=0, x={9:0}, x={9:0}] [L17] i++ VAL [cnt=0, i=1, ret=0, x={9:0}, x={9:0}] [L17] COND TRUE i < 5 VAL [cnt=0, i=1, ret=0, x={9:0}, x={9:0}] [L18] COND FALSE !(i > 5/2) VAL [cnt=0, i=1, ret=0, x={9:0}, x={9:0}] [L17] i++ VAL [cnt=0, i=2, ret=0, x={9:0}, x={9:0}] [L17] COND TRUE i < 5 VAL [cnt=0, i=2, ret=0, x={9:0}, x={9:0}] [L18] COND FALSE !(i > 5/2) VAL [cnt=0, i=2, ret=0, x={9:0}, x={9:0}] [L17] i++ VAL [cnt=0, i=3, ret=0, x={9:0}, x={9:0}] [L17] COND TRUE i < 5 VAL [cnt=0, i=3, ret=0, x={9:0}, x={9:0}] [L18] COND TRUE i > 5/2 [L19] EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 VAL [cnt=1, i=3, ret=-2147483643, x={9:0}, x={9:0}] [L17] i++ VAL [cnt=1, i=4, ret=-2147483643, x={9:0}, x={9:0}] [L17] COND TRUE i < 5 VAL [cnt=1, i=4, ret=-2147483643, x={9:0}, x={9:0}] [L18] COND TRUE i > 5/2 [L19] EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 VAL [cnt=2, i=4, ret=-4294967288, x={9:0}, x={9:0}] [L17] i++ VAL [cnt=2, i=5, ret=-4294967288, x={9:0}, x={9:0}] [L17] COND FALSE !(i < 5) VAL [cnt=2, i=5, ret=-4294967288, x={9:0}, x={9:0}] [L23] COND TRUE cnt !=0 [L24] return ret / cnt; VAL [\result=-2147483644, cnt=2, i=5, ret=-4294967288, x={9:0}, x={9:0}] [L38] RET, EXPR rangesum(x) VAL [rangesum(x)=-2147483644, x={9:0}] [L38] ret = rangesum(x) [L40] EXPR x[0] [L40] temp=x[0] [L40] EXPR x[1] [L40] x[0] = x[1] [L40] x[1] = temp VAL [ret=-2147483644, temp=2147483647, x={9:0}] [L41] CALL, EXPR rangesum(x) VAL [x={9:0}] [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={9:0}, x={9:0}] [L17] COND TRUE i < 5 VAL [cnt=0, i=0, ret=0, x={9:0}, x={9:0}] [L18] COND FALSE !(i > 5/2) VAL [cnt=0, i=0, ret=0, x={9:0}, x={9:0}] [L17] i++ VAL [cnt=0, i=1, ret=0, x={9:0}, x={9:0}] [L17] COND TRUE i < 5 VAL [cnt=0, i=1, ret=0, x={9:0}, x={9:0}] [L18] COND FALSE !(i > 5/2) VAL [cnt=0, i=1, ret=0, x={9:0}, x={9:0}] [L17] i++ VAL [cnt=0, i=2, ret=0, x={9:0}, x={9:0}] [L17] COND TRUE i < 5 VAL [cnt=0, i=2, ret=0, x={9:0}, x={9:0}] [L18] COND FALSE !(i > 5/2) VAL [cnt=0, i=2, ret=0, x={9:0}, x={9:0}] [L17] i++ VAL [cnt=0, i=3, ret=0, x={9:0}, x={9:0}] [L17] COND TRUE i < 5 VAL [cnt=0, i=3, ret=0, x={9:0}, x={9:0}] [L18] COND TRUE i > 5/2 [L19] EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 VAL [cnt=1, i=3, ret=-2147483643, x={9:0}, x={9:0}] [L17] i++ VAL [cnt=1, i=4, ret=-2147483643, x={9:0}, x={9:0}] [L17] COND TRUE i < 5 VAL [cnt=1, i=4, ret=-2147483643, x={9:0}, x={9:0}] [L18] COND TRUE i > 5/2 [L19] EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 VAL [cnt=2, i=4, ret=-4294967288, x={9:0}, x={9:0}] [L17] i++ VAL [cnt=2, i=5, ret=-4294967288, x={9:0}, x={9:0}] [L17] COND FALSE !(i < 5) VAL [cnt=2, i=5, ret=-4294967288, x={9:0}, x={9:0}] [L23] COND TRUE cnt !=0 [L24] return ret / cnt; VAL [\result=-2147483644, cnt=2, i=5, ret=-4294967288, x={9:0}, x={9:0}] [L41] RET, EXPR rangesum(x) VAL [rangesum(x)=-2147483644, ret=-2147483644, temp=2147483647, x={9:0}] [L41] ret2 = rangesum(x) [L42] EXPR x[0] [L42] temp=x[0] [L43] int i =0 ; VAL [i=0, ret=-2147483644, ret2=-2147483644, temp=2147483645, x={9:0}] [L43] COND TRUE i<5 -1 [L44] EXPR x[i+1] [L44] x[i] = x[i+1] [L43] i++ VAL [i=1, ret=-2147483644, ret2=-2147483644, temp=2147483645, x={9:0}] [L43] COND TRUE i<5 -1 [L44] EXPR x[i+1] [L44] x[i] = x[i+1] [L43] i++ VAL [i=2, ret=-2147483644, ret2=-2147483644, temp=2147483645, x={9:0}] [L43] COND TRUE i<5 -1 [L44] EXPR x[i+1] [L44] x[i] = x[i+1] [L43] i++ VAL [i=3, ret=-2147483644, ret2=-2147483644, temp=2147483645, x={9:0}] [L43] COND TRUE i<5 -1 [L44] EXPR x[i+1] [L44] x[i] = x[i+1] [L43] i++ VAL [i=4, ret=-2147483644, ret2=-2147483644, temp=2147483645, x={9:0}] [L43] COND FALSE !(i<5 -1) VAL [i=4, ret=-2147483644, ret2=-2147483644, temp=2147483645, x={9:0}] [L46] x[5 -1] = temp VAL [i=4, ret=-2147483644, ret2=-2147483644, temp=2147483645, x={9:0}] [L47] CALL, EXPR rangesum(x) VAL [x={9:0}] [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={9:0}, x={9:0}] [L17] COND TRUE i < 5 VAL [cnt=0, i=0, ret=0, x={9:0}, x={9:0}] [L18] COND FALSE !(i > 5/2) VAL [cnt=0, i=0, ret=0, x={9:0}, x={9:0}] [L17] i++ VAL [cnt=0, i=1, ret=0, x={9:0}, x={9:0}] [L17] COND TRUE i < 5 VAL [cnt=0, i=1, ret=0, x={9:0}, x={9:0}] [L18] COND FALSE !(i > 5/2) VAL [cnt=0, i=1, ret=0, x={9:0}, x={9:0}] [L17] i++ VAL [cnt=0, i=2, ret=0, x={9:0}, x={9:0}] [L17] COND TRUE i < 5 VAL [cnt=0, i=2, ret=0, x={9:0}, x={9:0}] [L18] COND FALSE !(i > 5/2) VAL [cnt=0, i=2, ret=0, x={9:0}, x={9:0}] [L17] i++ VAL [cnt=0, i=3, ret=0, x={9:0}, x={9:0}] [L17] COND TRUE i < 5 VAL [cnt=0, i=3, ret=0, x={9:0}, x={9:0}] [L18] COND TRUE i > 5/2 [L19] EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 VAL [cnt=1, i=3, ret=-2147483645, x={9:0}, x={9:0}] [L17] i++ VAL [cnt=1, i=4, ret=-2147483645, x={9:0}, x={9:0}] [L17] COND TRUE i < 5 VAL [cnt=1, i=4, ret=-2147483645, x={9:0}, x={9:0}] [L18] COND TRUE i > 5/2 [L19] EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 VAL [cnt=2, i=4, ret=0, x={9:0}, x={9:0}] [L17] i++ VAL [cnt=2, i=5, ret=0, x={9:0}, x={9:0}] [L17] COND FALSE !(i < 5) VAL [cnt=2, i=5, ret=0, x={9:0}, x={9:0}] [L23] COND TRUE cnt !=0 [L24] return ret / cnt; VAL [\result=0, cnt=2, i=5, ret=0, x={9:0}, x={9:0}] [L47] RET, EXPR rangesum(x) VAL [i=4, rangesum(x)=0, ret=-2147483644, ret2=-2147483644, temp=2147483645, x={9:0}] [L47] ret5 = rangesum(x) [L49] COND TRUE ret != ret2 || ret !=ret5 VAL [i=4, ret=-2147483644, ret2=-2147483644, ret5=0, temp=2147483645, x={9:0}] [L50] __VERIFIER_error() VAL [i=4, ret=-2147483644, ret2=-2147483644, ret5=0, temp=2147483645, x={9:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 37 locations, 1 error locations. UNSAFE Result, 2.8s OverallTime, 16 OverallIterations, 15 TraceHistogramMax, 0.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 539 SDtfs, 50 SDslu, 822 SDs, 0 SdLazy, 158 SolverSat, 24 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 970 GetRequests, 932 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=61occurred in iteration=15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 15 MinimizatonAttempts, 16 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 1202 NumberOfCodeBlocks, 1054 NumberOfCodeBlocksAsserted, 45 NumberOfCheckSat, 1048 ConstructedInterpolants, 0 QuantifiedInterpolants, 81768 SizeOfPredicates, 13 NumberOfNonLiveVariables, 2648 ConjunctsInSsa, 51 ConjunctsInUnsatCore, 17 InterpolantComputations, 5 PerfectInterpolantSequences, 2275/2350 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...