./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/reducercommutativity/rangesum_false-unreach-call_true-termination.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 635dfa2a Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_2319ce81-7a6a-44a8-9a45-2231b47c94b2/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_2319ce81-7a6a-44a8-9a45-2231b47c94b2/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_2319ce81-7a6a-44a8-9a45-2231b47c94b2/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_2319ce81-7a6a-44a8-9a45-2231b47c94b2/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/reducercommutativity/rangesum_false-unreach-call_true-termination.i -s /tmp/vcloud-vcloud-master/worker/working_dir_2319ce81-7a6a-44a8-9a45-2231b47c94b2/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_2319ce81-7a6a-44a8-9a45-2231b47c94b2/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 279fae57395782089eff32ec1396d1726d808c7f ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 0.1.23-635dfa2 [2018-12-08 10:56:47,132 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-08 10:56:47,133 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-08 10:56:47,139 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-08 10:56:47,139 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-08 10:56:47,140 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-08 10:56:47,140 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-08 10:56:47,141 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-08 10:56:47,142 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-08 10:56:47,142 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-08 10:56:47,142 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-08 10:56:47,143 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-08 10:56:47,143 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-08 10:56:47,143 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-08 10:56:47,144 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-08 10:56:47,144 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-08 10:56:47,145 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-08 10:56:47,145 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-08 10:56:47,146 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-08 10:56:47,147 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-08 10:56:47,147 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-08 10:56:47,148 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-08 10:56:47,149 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-08 10:56:47,149 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-08 10:56:47,149 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-08 10:56:47,150 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-08 10:56:47,150 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-08 10:56:47,150 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-08 10:56:47,151 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-08 10:56:47,151 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-08 10:56:47,151 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-08 10:56:47,152 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-08 10:56:47,152 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-08 10:56:47,152 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-08 10:56:47,152 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-08 10:56:47,153 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-08 10:56:47,153 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_2319ce81-7a6a-44a8-9a45-2231b47c94b2/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-12-08 10:56:47,159 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-08 10:56:47,160 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-08 10:56:47,160 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-08 10:56:47,160 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-08 10:56:47,160 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-08 10:56:47,161 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-08 10:56:47,161 INFO L133 SettingsManager]: * Use SBE=true [2018-12-08 10:56:47,161 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-08 10:56:47,161 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-08 10:56:47,161 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-08 10:56:47,161 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-08 10:56:47,161 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-08 10:56:47,161 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-08 10:56:47,161 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-08 10:56:47,161 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-08 10:56:47,161 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-08 10:56:47,162 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-08 10:56:47,162 INFO L133 SettingsManager]: * Use constant arrays=true [2018-12-08 10:56:47,162 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-08 10:56:47,162 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-08 10:56:47,162 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-08 10:56:47,162 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-08 10:56:47,162 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-08 10:56:47,162 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-08 10:56:47,162 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-08 10:56:47,162 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-08 10:56:47,162 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-08 10:56:47,163 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-12-08 10:56:47,163 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-08 10:56:47,163 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-08 10:56:47,163 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_2319ce81-7a6a-44a8-9a45-2231b47c94b2/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 -> 279fae57395782089eff32ec1396d1726d808c7f [2018-12-08 10:56:47,180 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-08 10:56:47,190 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-08 10:56:47,192 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-08 10:56:47,193 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-08 10:56:47,194 INFO L276 PluginConnector]: CDTParser initialized [2018-12-08 10:56:47,194 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_2319ce81-7a6a-44a8-9a45-2231b47c94b2/bin-2019/uautomizer/../../sv-benchmarks/c/reducercommutativity/rangesum_false-unreach-call_true-termination.i [2018-12-08 10:56:47,230 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_2319ce81-7a6a-44a8-9a45-2231b47c94b2/bin-2019/uautomizer/data/a6e4fcb5f/45acf28d9e244b81af8aea03d19b150b/FLAGd55f2cd77 [2018-12-08 10:56:47,604 INFO L307 CDTParser]: Found 1 translation units. [2018-12-08 10:56:47,604 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_2319ce81-7a6a-44a8-9a45-2231b47c94b2/sv-benchmarks/c/reducercommutativity/rangesum_false-unreach-call_true-termination.i [2018-12-08 10:56:47,607 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_2319ce81-7a6a-44a8-9a45-2231b47c94b2/bin-2019/uautomizer/data/a6e4fcb5f/45acf28d9e244b81af8aea03d19b150b/FLAGd55f2cd77 [2018-12-08 10:56:47,615 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_2319ce81-7a6a-44a8-9a45-2231b47c94b2/bin-2019/uautomizer/data/a6e4fcb5f/45acf28d9e244b81af8aea03d19b150b [2018-12-08 10:56:47,617 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-08 10:56:47,618 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-08 10:56:47,618 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-08 10:56:47,618 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-08 10:56:47,620 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-08 10:56:47,621 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.12 10:56:47" (1/1) ... [2018-12-08 10:56:47,622 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@258f9f2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 10:56:47, skipping insertion in model container [2018-12-08 10:56:47,622 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.12 10:56:47" (1/1) ... [2018-12-08 10:56:47,626 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-08 10:56:47,636 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-08 10:56:47,722 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-08 10:56:47,728 INFO L191 MainTranslator]: Completed pre-run [2018-12-08 10:56:47,741 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-08 10:56:47,749 INFO L195 MainTranslator]: Completed translation [2018-12-08 10:56:47,750 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 10:56:47 WrapperNode [2018-12-08 10:56:47,750 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-08 10:56:47,750 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-08 10:56:47,750 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-08 10:56:47,750 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-08 10:56:47,755 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 10:56:47" (1/1) ... [2018-12-08 10:56:47,760 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 10:56:47" (1/1) ... [2018-12-08 10:56:47,764 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-08 10:56:47,764 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-08 10:56:47,764 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-08 10:56:47,764 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-08 10:56:47,798 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 10:56:47" (1/1) ... [2018-12-08 10:56:47,798 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 10:56:47" (1/1) ... [2018-12-08 10:56:47,799 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 10:56:47" (1/1) ... [2018-12-08 10:56:47,800 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 10:56:47" (1/1) ... [2018-12-08 10:56:47,806 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 10:56:47" (1/1) ... [2018-12-08 10:56:47,810 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 10:56:47" (1/1) ... [2018-12-08 10:56:47,811 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 10:56:47" (1/1) ... [2018-12-08 10:56:47,813 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-08 10:56:47,813 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-08 10:56:47,813 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-08 10:56:47,813 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-08 10:56:47,814 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 10:56:47" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2319ce81-7a6a-44a8-9a45-2231b47c94b2/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 [2018-12-08 10:56:47,845 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-12-08 10:56:47,846 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-08 10:56:47,846 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-08 10:56:47,846 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-12-08 10:56:47,846 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-08 10:56:47,846 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-08 10:56:47,846 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2018-12-08 10:56:47,846 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-08 10:56:47,846 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-08 10:56:47,846 INFO L130 BoogieDeclarations]: Found specification of procedure rangesum [2018-12-08 10:56:47,846 INFO L138 BoogieDeclarations]: Found implementation of procedure rangesum [2018-12-08 10:56:47,846 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-12-08 10:56:47,846 INFO L130 BoogieDeclarations]: Found specification of procedure init_nondet [2018-12-08 10:56:47,846 INFO L138 BoogieDeclarations]: Found implementation of procedure init_nondet [2018-12-08 10:56:47,985 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-08 10:56:47,985 INFO L280 CfgBuilder]: Removed 3 assue(true) statements. [2018-12-08 10:56:47,985 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 10:56:47 BoogieIcfgContainer [2018-12-08 10:56:47,985 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-08 10:56:47,986 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-08 10:56:47,986 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-08 10:56:47,988 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-08 10:56:47,988 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.12 10:56:47" (1/3) ... [2018-12-08 10:56:47,988 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d1c70d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.12 10:56:47, skipping insertion in model container [2018-12-08 10:56:47,988 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 10:56:47" (2/3) ... [2018-12-08 10:56:47,989 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d1c70d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.12 10:56:47, skipping insertion in model container [2018-12-08 10:56:47,989 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 10:56:47" (3/3) ... [2018-12-08 10:56:47,990 INFO L112 eAbstractionObserver]: Analyzing ICFG rangesum_false-unreach-call_true-termination.i [2018-12-08 10:56:47,996 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-08 10:56:48,000 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-08 10:56:48,010 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-08 10:56:48,027 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-08 10:56:48,028 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-08 10:56:48,028 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-08 10:56:48,028 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-08 10:56:48,028 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-08 10:56:48,028 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-08 10:56:48,028 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-08 10:56:48,028 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-08 10:56:48,028 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-08 10:56:48,040 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2018-12-08 10:56:48,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-12-08 10:56:48,044 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 10:56:48,045 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] [2018-12-08 10:56:48,046 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 10:56:48,049 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 10:56:48,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1377249276, now seen corresponding path program 1 times [2018-12-08 10:56:48,050 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 10:56:48,051 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 10:56:48,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 10:56:48,079 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 10:56:48,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 10:56:48,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 10:56:48,128 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2018-12-08 10:56:48,129 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 10:56:48,129 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2319ce81-7a6a-44a8-9a45-2231b47c94b2/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 [2018-12-08 10:56:48,135 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 10:56:48,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 10:56:48,170 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 10:56:48,183 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-12-08 10:56:48,199 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 10:56:48,199 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-08 10:56:48,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-12-08 10:56:48,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-12-08 10:56:48,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-12-08 10:56:48,210 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 2 states. [2018-12-08 10:56:48,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 10:56:48,223 INFO L93 Difference]: Finished difference Result 67 states and 89 transitions. [2018-12-08 10:56:48,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-12-08 10:56:48,224 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 38 [2018-12-08 10:56:48,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 10:56:48,229 INFO L225 Difference]: With dead ends: 67 [2018-12-08 10:56:48,229 INFO L226 Difference]: Without dead ends: 33 [2018-12-08 10:56:48,231 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-12-08 10:56:48,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-12-08 10:56:48,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-12-08 10:56:48,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-12-08 10:56:48,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2018-12-08 10:56:48,254 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 38 [2018-12-08 10:56:48,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 10:56:48,255 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2018-12-08 10:56:48,255 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-12-08 10:56:48,255 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2018-12-08 10:56:48,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-12-08 10:56:48,257 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 10:56:48,257 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] [2018-12-08 10:56:48,257 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 10:56:48,257 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 10:56:48,258 INFO L82 PathProgramCache]: Analyzing trace with hash -1240892162, now seen corresponding path program 1 times [2018-12-08 10:56:48,258 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 10:56:48,258 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 10:56:48,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 10:56:48,259 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 10:56:48,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 10:56:48,270 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-12-08 10:56:48,270 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-12-08 10:56:48,270 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2319ce81-7a6a-44a8-9a45-2231b47c94b2/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 [2018-12-08 10:56:48,278 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 10:56:48,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 10:56:48,303 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 10:56:48,312 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-12-08 10:56:48,326 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 10:56:48,327 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-12-08 10:56:48,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-08 10:56:48,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-08 10:56:48,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-08 10:56:48,328 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand 3 states. [2018-12-08 10:56:48,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 10:56:48,343 INFO L93 Difference]: Finished difference Result 57 states and 75 transitions. [2018-12-08 10:56:48,344 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-08 10:56:48,344 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 38 [2018-12-08 10:56:48,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 10:56:48,345 INFO L225 Difference]: With dead ends: 57 [2018-12-08 10:56:48,345 INFO L226 Difference]: Without dead ends: 39 [2018-12-08 10:56:48,346 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-08 10:56:48,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-12-08 10:56:48,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2018-12-08 10:56:48,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-12-08 10:56:48,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2018-12-08 10:56:48,351 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 38 [2018-12-08 10:56:48,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 10:56:48,351 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2018-12-08 10:56:48,351 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-08 10:56:48,351 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2018-12-08 10:56:48,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-12-08 10:56:48,352 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 10:56:48,352 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] [2018-12-08 10:56:48,352 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 10:56:48,352 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 10:56:48,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1742767491, now seen corresponding path program 1 times [2018-12-08 10:56:48,352 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 10:56:48,352 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 10:56:48,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 10:56:48,353 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 10:56:48,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 10:56:48,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 10:56:48,451 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-12-08 10:56:48,451 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 10:56:48,452 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2018-12-08 10:56:48,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-08 10:56:48,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-08 10:56:48,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2018-12-08 10:56:48,453 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand 9 states. [2018-12-08 10:56:48,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 10:56:48,516 INFO L93 Difference]: Finished difference Result 63 states and 78 transitions. [2018-12-08 10:56:48,516 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-08 10:56:48,516 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 38 [2018-12-08 10:56:48,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 10:56:48,517 INFO L225 Difference]: With dead ends: 63 [2018-12-08 10:56:48,517 INFO L226 Difference]: Without dead ends: 59 [2018-12-08 10:56:48,517 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2018-12-08 10:56:48,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-12-08 10:56:48,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 46. [2018-12-08 10:56:48,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-12-08 10:56:48,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 60 transitions. [2018-12-08 10:56:48,523 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 60 transitions. Word has length 38 [2018-12-08 10:56:48,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 10:56:48,523 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 60 transitions. [2018-12-08 10:56:48,523 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-08 10:56:48,523 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 60 transitions. [2018-12-08 10:56:48,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-12-08 10:56:48,524 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 10:56:48,524 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 10:56:48,524 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 10:56:48,524 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 10:56:48,524 INFO L82 PathProgramCache]: Analyzing trace with hash 699235283, now seen corresponding path program 1 times [2018-12-08 10:56:48,524 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 10:56:48,524 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 10:56:48,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 10:56:48,525 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 10:56:48,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 10:56:48,535 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-12-08 10:56:48,535 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-12-08 10:56:48,535 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2319ce81-7a6a-44a8-9a45-2231b47c94b2/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 [2018-12-08 10:56:48,541 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 10:56:48,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 10:56:48,560 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 10:56:48,576 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-12-08 10:56:48,592 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 10:56:48,592 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-08 10:56:48,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-08 10:56:48,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-08 10:56:48,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-12-08 10:56:48,593 INFO L87 Difference]: Start difference. First operand 46 states and 60 transitions. Second operand 4 states. [2018-12-08 10:56:48,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 10:56:48,630 INFO L93 Difference]: Finished difference Result 83 states and 111 transitions. [2018-12-08 10:56:48,630 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-08 10:56:48,630 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 41 [2018-12-08 10:56:48,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 10:56:48,631 INFO L225 Difference]: With dead ends: 83 [2018-12-08 10:56:48,631 INFO L226 Difference]: Without dead ends: 48 [2018-12-08 10:56:48,631 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-12-08 10:56:48,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-12-08 10:56:48,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2018-12-08 10:56:48,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-12-08 10:56:48,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 61 transitions. [2018-12-08 10:56:48,636 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 61 transitions. Word has length 41 [2018-12-08 10:56:48,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 10:56:48,637 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 61 transitions. [2018-12-08 10:56:48,637 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-08 10:56:48,637 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 61 transitions. [2018-12-08 10:56:48,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-12-08 10:56:48,638 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 10:56:48,638 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 10:56:48,639 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 10:56:48,639 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 10:56:48,639 INFO L82 PathProgramCache]: Analyzing trace with hash 1178839093, now seen corresponding path program 1 times [2018-12-08 10:56:48,639 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 10:56:48,639 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 10:56:48,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 10:56:48,640 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 10:56:48,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 10:56:48,650 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-12-08 10:56:48,650 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-12-08 10:56:48,650 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2319ce81-7a6a-44a8-9a45-2231b47c94b2/bin-2019/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-12-08 10:56:48,657 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 10:56:48,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 10:56:48,679 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 10:56:48,699 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-12-08 10:56:48,714 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-12-08 10:56:48,715 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2018-12-08 10:56:48,715 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-08 10:56:48,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-08 10:56:48,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-12-08 10:56:48,715 INFO L87 Difference]: Start difference. First operand 47 states and 61 transitions. Second operand 5 states. [2018-12-08 10:56:48,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 10:56:48,763 INFO L93 Difference]: Finished difference Result 85 states and 113 transitions. [2018-12-08 10:56:48,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-08 10:56:48,764 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 43 [2018-12-08 10:56:48,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 10:56:48,764 INFO L225 Difference]: With dead ends: 85 [2018-12-08 10:56:48,765 INFO L226 Difference]: Without dead ends: 50 [2018-12-08 10:56:48,765 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-12-08 10:56:48,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-12-08 10:56:48,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2018-12-08 10:56:48,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-12-08 10:56:48,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 63 transitions. [2018-12-08 10:56:48,770 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 63 transitions. Word has length 43 [2018-12-08 10:56:48,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 10:56:48,770 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 63 transitions. [2018-12-08 10:56:48,770 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-08 10:56:48,770 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 63 transitions. [2018-12-08 10:56:48,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-12-08 10:56:48,771 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 10:56:48,771 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 10:56:48,771 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 10:56:48,772 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 10:56:48,772 INFO L82 PathProgramCache]: Analyzing trace with hash -1778367465, now seen corresponding path program 2 times [2018-12-08 10:56:48,772 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 10:56:48,772 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 10:56:48,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 10:56:48,772 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 10:56:48,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 10:56:48,784 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-12-08 10:56:48,784 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-12-08 10:56:48,784 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2319ce81-7a6a-44a8-9a45-2231b47c94b2/bin-2019/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-12-08 10:56:48,791 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-08 10:56:48,818 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-08 10:56:48,819 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 10:56:48,821 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 10:56:48,837 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-12-08 10:56:48,850 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-12-08 10:56:48,851 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2018-12-08 10:56:48,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-08 10:56:48,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-08 10:56:48,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-12-08 10:56:48,851 INFO L87 Difference]: Start difference. First operand 49 states and 63 transitions. Second operand 5 states. [2018-12-08 10:56:48,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 10:56:48,895 INFO L93 Difference]: Finished difference Result 86 states and 124 transitions. [2018-12-08 10:56:48,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-08 10:56:48,896 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 45 [2018-12-08 10:56:48,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 10:56:48,896 INFO L225 Difference]: With dead ends: 86 [2018-12-08 10:56:48,896 INFO L226 Difference]: Without dead ends: 55 [2018-12-08 10:56:48,897 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-12-08 10:56:48,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-12-08 10:56:48,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2018-12-08 10:56:48,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-12-08 10:56:48,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 68 transitions. [2018-12-08 10:56:48,901 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 68 transitions. Word has length 45 [2018-12-08 10:56:48,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 10:56:48,902 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 68 transitions. [2018-12-08 10:56:48,902 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-08 10:56:48,902 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 68 transitions. [2018-12-08 10:56:48,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-12-08 10:56:48,903 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 10:56:48,903 INFO L402 BasicCegarLoop]: trace histogram [7, 7, 6, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 10:56:48,903 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 10:56:48,903 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 10:56:48,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1346922871, now seen corresponding path program 1 times [2018-12-08 10:56:48,903 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 10:56:48,903 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 10:56:48,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 10:56:48,904 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 10:56:48,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 10:56:48,916 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-12-08 10:56:48,916 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-12-08 10:56:48,916 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2319ce81-7a6a-44a8-9a45-2231b47c94b2/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 [2018-12-08 10:56:48,922 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 10:56:48,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 10:56:48,947 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 10:56:48,960 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2018-12-08 10:56:48,974 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 10:56:48,974 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-08 10:56:48,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-08 10:56:48,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-08 10:56:48,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-12-08 10:56:48,975 INFO L87 Difference]: Start difference. First operand 54 states and 68 transitions. Second operand 4 states. [2018-12-08 10:56:48,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 10:56:48,998 INFO L93 Difference]: Finished difference Result 84 states and 105 transitions. [2018-12-08 10:56:48,998 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-08 10:56:48,998 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 63 [2018-12-08 10:56:48,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 10:56:48,999 INFO L225 Difference]: With dead ends: 84 [2018-12-08 10:56:49,000 INFO L226 Difference]: Without dead ends: 58 [2018-12-08 10:56:49,000 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-12-08 10:56:49,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-12-08 10:56:49,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2018-12-08 10:56:49,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-12-08 10:56:49,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2018-12-08 10:56:49,007 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 63 [2018-12-08 10:56:49,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 10:56:49,008 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2018-12-08 10:56:49,008 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-08 10:56:49,008 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2018-12-08 10:56:49,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-12-08 10:56:49,009 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 10:56:49,009 INFO L402 BasicCegarLoop]: trace histogram [7, 7, 6, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 10:56:49,009 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 10:56:49,009 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 10:56:49,010 INFO L82 PathProgramCache]: Analyzing trace with hash 1679269433, now seen corresponding path program 1 times [2018-12-08 10:56:49,010 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 10:56:49,010 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 10:56:49,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 10:56:49,011 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 10:56:49,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 10:56:49,027 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-12-08 10:56:49,027 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-12-08 10:56:49,027 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2319ce81-7a6a-44a8-9a45-2231b47c94b2/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 [2018-12-08 10:56:49,035 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 10:56:49,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 10:56:49,059 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 10:56:49,094 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 66 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2018-12-08 10:56:49,108 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-12-08 10:56:49,108 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2018-12-08 10:56:49,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-08 10:56:49,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-08 10:56:49,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2018-12-08 10:56:49,109 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand 9 states. [2018-12-08 10:56:49,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 10:56:49,157 INFO L93 Difference]: Finished difference Result 120 states and 154 transitions. [2018-12-08 10:56:49,157 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-08 10:56:49,157 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 65 [2018-12-08 10:56:49,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 10:56:49,157 INFO L225 Difference]: With dead ends: 120 [2018-12-08 10:56:49,158 INFO L226 Difference]: Without dead ends: 59 [2018-12-08 10:56:49,158 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2018-12-08 10:56:49,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-12-08 10:56:49,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2018-12-08 10:56:49,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-12-08 10:56:49,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 72 transitions. [2018-12-08 10:56:49,162 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 72 transitions. Word has length 65 [2018-12-08 10:56:49,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 10:56:49,162 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 72 transitions. [2018-12-08 10:56:49,162 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-08 10:56:49,163 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 72 transitions. [2018-12-08 10:56:49,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-12-08 10:56:49,164 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 10:56:49,164 INFO L402 BasicCegarLoop]: trace histogram [7, 7, 6, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 10:56:49,164 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 10:56:49,164 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 10:56:49,164 INFO L82 PathProgramCache]: Analyzing trace with hash -2040052581, now seen corresponding path program 2 times [2018-12-08 10:56:49,164 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 10:56:49,164 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 10:56:49,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 10:56:49,165 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 10:56:49,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 10:56:49,175 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-12-08 10:56:49,175 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-12-08 10:56:49,175 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2319ce81-7a6a-44a8-9a45-2231b47c94b2/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 [2018-12-08 10:56:49,180 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-08 10:56:49,201 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-08 10:56:49,201 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 10:56:49,202 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 10:56:49,246 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 47 proven. 10 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2018-12-08 10:56:49,260 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-12-08 10:56:49,260 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2018-12-08 10:56:49,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-08 10:56:49,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-08 10:56:49,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2018-12-08 10:56:49,261 INFO L87 Difference]: Start difference. First operand 58 states and 72 transitions. Second operand 9 states. [2018-12-08 10:56:49,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 10:56:49,341 INFO L93 Difference]: Finished difference Result 99 states and 128 transitions. [2018-12-08 10:56:49,341 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-08 10:56:49,341 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 67 [2018-12-08 10:56:49,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 10:56:49,342 INFO L225 Difference]: With dead ends: 99 [2018-12-08 10:56:49,342 INFO L226 Difference]: Without dead ends: 63 [2018-12-08 10:56:49,343 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2018-12-08 10:56:49,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-12-08 10:56:49,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 60. [2018-12-08 10:56:49,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-12-08 10:56:49,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 74 transitions. [2018-12-08 10:56:49,349 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 74 transitions. Word has length 67 [2018-12-08 10:56:49,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 10:56:49,349 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 74 transitions. [2018-12-08 10:56:49,349 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-08 10:56:49,349 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 74 transitions. [2018-12-08 10:56:49,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-12-08 10:56:49,350 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 10:56:49,350 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, 1] [2018-12-08 10:56:49,350 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 10:56:49,350 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 10:56:49,350 INFO L82 PathProgramCache]: Analyzing trace with hash -737365673, now seen corresponding path program 1 times [2018-12-08 10:56:49,350 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 10:56:49,351 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 10:56:49,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 10:56:49,351 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 10:56:49,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 10:56:49,358 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-12-08 10:56:49,358 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-12-08 10:56:49,358 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2319ce81-7a6a-44a8-9a45-2231b47c94b2/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 [2018-12-08 10:56:49,371 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 10:56:49,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 10:56:49,394 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 10:56:49,431 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 80 proven. 6 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2018-12-08 10:56:49,445 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-12-08 10:56:49,445 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2018-12-08 10:56:49,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-08 10:56:49,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-08 10:56:49,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-12-08 10:56:49,446 INFO L87 Difference]: Start difference. First operand 60 states and 74 transitions. Second operand 8 states. [2018-12-08 10:56:49,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 10:56:49,502 INFO L93 Difference]: Finished difference Result 94 states and 115 transitions. [2018-12-08 10:56:49,502 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-08 10:56:49,502 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 73 [2018-12-08 10:56:49,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 10:56:49,503 INFO L225 Difference]: With dead ends: 94 [2018-12-08 10:56:49,503 INFO L226 Difference]: Without dead ends: 66 [2018-12-08 10:56:49,503 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-12-08 10:56:49,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-12-08 10:56:49,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2018-12-08 10:56:49,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-12-08 10:56:49,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 78 transitions. [2018-12-08 10:56:49,507 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 78 transitions. Word has length 73 [2018-12-08 10:56:49,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 10:56:49,508 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 78 transitions. [2018-12-08 10:56:49,508 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-08 10:56:49,508 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 78 transitions. [2018-12-08 10:56:49,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-12-08 10:56:49,508 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 10:56:49,508 INFO L402 BasicCegarLoop]: trace histogram [9, 9, 6, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 10:56:49,508 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 10:56:49,508 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 10:56:49,509 INFO L82 PathProgramCache]: Analyzing trace with hash 132738585, now seen corresponding path program 2 times [2018-12-08 10:56:49,509 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 10:56:49,509 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 10:56:49,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 10:56:49,509 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 10:56:49,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 10:56:49,516 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-12-08 10:56:49,517 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-12-08 10:56:49,517 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2319ce81-7a6a-44a8-9a45-2231b47c94b2/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 [2018-12-08 10:56:49,522 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-08 10:56:49,567 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-08 10:56:49,567 INFO L250 tOrderPrioritization]: Conjunction of SSA is sat [2018-12-08 10:56:49,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-08 10:56:49,631 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-12-08 10:56:49,664 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 08.12 10:56:49 BoogieIcfgContainer [2018-12-08 10:56:49,664 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-08 10:56:49,665 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-08 10:56:49,665 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-08 10:56:49,665 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-08 10:56:49,665 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 10:56:47" (3/4) ... [2018-12-08 10:56:49,667 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-12-08 10:56:49,720 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_2319ce81-7a6a-44a8-9a45-2231b47c94b2/bin-2019/uautomizer/witness.graphml [2018-12-08 10:56:49,720 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-08 10:56:49,721 INFO L168 Benchmark]: Toolchain (without parser) took 2103.49 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 217.1 MB). Free memory was 957.1 MB in the beginning and 1.1 GB in the end (delta: -176.6 MB). Peak memory consumption was 40.4 MB. Max. memory is 11.5 GB. [2018-12-08 10:56:49,722 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 976.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 10:56:49,722 INFO L168 Benchmark]: CACSL2BoogieTranslator took 131.61 ms. Allocated memory is still 1.0 GB. Free memory was 957.1 MB in the beginning and 946.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-08 10:56:49,722 INFO L168 Benchmark]: Boogie Procedure Inliner took 13.87 ms. Allocated memory is still 1.0 GB. Free memory was 946.3 MB in the beginning and 941.0 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2018-12-08 10:56:49,722 INFO L168 Benchmark]: Boogie Preprocessor took 48.87 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 136.8 MB). Free memory was 941.0 MB in the beginning and 1.1 GB in the end (delta: -187.2 MB). Peak memory consumption was 13.1 MB. Max. memory is 11.5 GB. [2018-12-08 10:56:49,723 INFO L168 Benchmark]: RCFGBuilder took 171.99 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: 18.4 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. [2018-12-08 10:56:49,723 INFO L168 Benchmark]: TraceAbstraction took 1678.86 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 80.2 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -31.6 MB). Peak memory consumption was 48.7 MB. Max. memory is 11.5 GB. [2018-12-08 10:56:49,723 INFO L168 Benchmark]: Witness Printer took 55.57 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: 7.6 MB). Peak memory consumption was 7.6 MB. Max. memory is 11.5 GB. [2018-12-08 10:56:49,725 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 976.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 131.61 ms. Allocated memory is still 1.0 GB. Free memory was 957.1 MB in the beginning and 946.3 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 13.87 ms. Allocated memory is still 1.0 GB. Free memory was 946.3 MB in the beginning and 941.0 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 48.87 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 136.8 MB). Free memory was 941.0 MB in the beginning and 1.1 GB in the end (delta: -187.2 MB). Peak memory consumption was 13.1 MB. Max. memory is 11.5 GB. * RCFGBuilder took 171.99 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: 18.4 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1678.86 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 80.2 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -31.6 MB). Peak memory consumption was 48.7 MB. Max. memory is 11.5 GB. * Witness Printer took 55.57 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: 7.6 MB). Peak memory consumption was 7.6 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 53]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L4] int N; VAL [\old(N)=7, N=0] [L32] N = __VERIFIER_nondet_int() [L33] COND TRUE N > 1 [L34] int x[N]; VAL [\old(N)=0, N=3, x={9:0}] [L35] CALL init_nondet(x) VAL [\old(N)=0, N=3, x={9:0}] [L6] int i; [L7] i = 0 VAL [\old(N)=0, i=0, N=3, x={9:0}, x={9:0}] [L7] COND TRUE i < N [L8] x[i] = __VERIFIER_nondet_int() [L7] i++ VAL [\old(N)=0, i=1, N=3, x={9:0}, x={9:0}] [L7] COND TRUE i < N [L8] x[i] = __VERIFIER_nondet_int() [L7] i++ VAL [\old(N)=0, i=2, N=3, x={9:0}, x={9:0}] [L7] COND TRUE i < N [L8] x[i] = __VERIFIER_nondet_int() [L7] i++ VAL [\old(N)=0, i=3, N=3, x={9:0}, x={9:0}] [L7] COND FALSE !(i < N) VAL [\old(N)=0, i=3, N=3, x={9:0}, x={9:0}] [L35] RET init_nondet(x) VAL [\old(N)=0, N=3, x={9:0}] [L36] int temp; [L37] int ret; [L38] int ret2; [L39] int ret5; VAL [\old(N)=0, N=3, x={9:0}] [L41] CALL, EXPR rangesum(x) VAL [\old(N)=0, N=3, x={9:0}] [L14] int i; [L15] long long ret; [L16] ret = 0 [L17] int cnt = 0; [L18] i = 0 VAL [\old(N)=0, cnt=0, i=0, N=3, ret=0, x={9:0}, x={9:0}] [L18] COND TRUE i < N VAL [\old(N)=0, cnt=0, i=0, N=3, ret=0, x={9:0}, x={9:0}] [L19] COND FALSE !(i > N/2) VAL [\old(N)=0, cnt=0, i=0, N=3, ret=0, x={9:0}, x={9:0}] [L18] i++ VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={9:0}, x={9:0}] [L18] COND TRUE i < N VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={9:0}, x={9:0}] [L19] COND FALSE !(i > N/2) VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={9:0}, x={9:0}] [L18] i++ VAL [\old(N)=0, cnt=0, i=2, N=3, ret=0, x={9:0}, x={9:0}] [L18] COND TRUE i < N VAL [\old(N)=0, cnt=0, i=2, N=3, ret=0, x={9:0}, x={9:0}] [L19] COND TRUE i > N/2 [L20] EXPR x[i] [L20] ret = ret + x[i] [L21] cnt = cnt + 1 VAL [\old(N)=0, cnt=1, i=2, N=3, ret=-2147483647, x={9:0}, x={9:0}] [L18] i++ VAL [\old(N)=0, cnt=1, i=3, N=3, ret=-2147483647, x={9:0}, x={9:0}] [L18] COND FALSE !(i < N) VAL [\old(N)=0, cnt=1, i=3, N=3, ret=-2147483647, x={9:0}, x={9:0}] [L24] COND TRUE cnt !=0 [L25] return ret / cnt; VAL [\old(N)=0, \result=-2147483647, cnt=1, i=3, N=3, ret=-2147483647, x={9:0}, x={9:0}] [L41] RET, EXPR rangesum(x) VAL [\old(N)=0, N=3, rangesum(x)=-2147483647, x={9:0}] [L41] ret = rangesum(x) [L43] EXPR x[0] [L43] temp=x[0] [L43] EXPR x[1] [L43] x[0] = x[1] [L43] x[1] = temp VAL [\old(N)=0, N=3, ret=-2147483647, temp=-2147483647, x={9:0}] [L44] CALL, EXPR rangesum(x) VAL [\old(N)=0, N=3, x={9:0}] [L14] int i; [L15] long long ret; [L16] ret = 0 [L17] int cnt = 0; [L18] i = 0 VAL [\old(N)=0, cnt=0, i=0, N=3, ret=0, x={9:0}, x={9:0}] [L18] COND TRUE i < N VAL [\old(N)=0, cnt=0, i=0, N=3, ret=0, x={9:0}, x={9:0}] [L19] COND FALSE !(i > N/2) VAL [\old(N)=0, cnt=0, i=0, N=3, ret=0, x={9:0}, x={9:0}] [L18] i++ VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={9:0}, x={9:0}] [L18] COND TRUE i < N VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={9:0}, x={9:0}] [L19] COND FALSE !(i > N/2) VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={9:0}, x={9:0}] [L18] i++ VAL [\old(N)=0, cnt=0, i=2, N=3, ret=0, x={9:0}, x={9:0}] [L18] COND TRUE i < N VAL [\old(N)=0, cnt=0, i=2, N=3, ret=0, x={9:0}, x={9:0}] [L19] COND TRUE i > N/2 [L20] EXPR x[i] [L20] ret = ret + x[i] [L21] cnt = cnt + 1 VAL [\old(N)=0, cnt=1, i=2, N=3, ret=-2147483647, x={9:0}, x={9:0}] [L18] i++ VAL [\old(N)=0, cnt=1, i=3, N=3, ret=-2147483647, x={9:0}, x={9:0}] [L18] COND FALSE !(i < N) VAL [\old(N)=0, cnt=1, i=3, N=3, ret=-2147483647, x={9:0}, x={9:0}] [L24] COND TRUE cnt !=0 [L25] return ret / cnt; VAL [\old(N)=0, \result=-2147483647, cnt=1, i=3, N=3, ret=-2147483647, x={9:0}, x={9:0}] [L44] RET, EXPR rangesum(x) VAL [\old(N)=0, N=3, rangesum(x)=-2147483647, ret=-2147483647, temp=-2147483647, x={9:0}] [L44] ret2 = rangesum(x) [L45] EXPR x[0] [L45] temp=x[0] [L46] int i =0 ; VAL [\old(N)=0, i=0, N=3, ret=-2147483647, ret2=-2147483647, temp=0, x={9:0}] [L46] COND TRUE i N/2) VAL [\old(N)=0, cnt=0, i=0, N=3, ret=0, x={9:0}, x={9:0}] [L18] i++ VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={9:0}, x={9:0}] [L18] COND TRUE i < N VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={9:0}, x={9:0}] [L19] COND FALSE !(i > N/2) VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={9:0}, x={9:0}] [L18] i++ VAL [\old(N)=0, cnt=0, i=2, N=3, ret=0, x={9:0}, x={9:0}] [L18] COND TRUE i < N VAL [\old(N)=0, cnt=0, i=2, N=3, ret=0, x={9:0}, x={9:0}] [L19] COND TRUE i > N/2 [L20] EXPR x[i] [L20] ret = ret + x[i] [L21] cnt = cnt + 1 VAL [\old(N)=0, cnt=1, i=2, N=3, ret=0, x={9:0}, x={9:0}] [L18] i++ VAL [\old(N)=0, cnt=1, i=3, N=3, ret=0, x={9:0}, x={9:0}] [L18] COND FALSE !(i < N) VAL [\old(N)=0, cnt=1, i=3, N=3, ret=0, x={9:0}, x={9:0}] [L24] COND TRUE cnt !=0 [L25] return ret / cnt; VAL [\old(N)=0, \result=0, cnt=1, i=3, N=3, ret=0, x={9:0}, x={9:0}] [L50] RET, EXPR rangesum(x) VAL [\old(N)=0, i=2, N=3, rangesum(x)=0, ret=-2147483647, ret2=-2147483647, temp=0, x={9:0}] [L50] ret5 = rangesum(x) [L52] COND TRUE ret != ret2 || ret !=ret5 VAL [\old(N)=0, i=2, N=3, ret=-2147483647, ret2=-2147483647, ret5=0, temp=0, x={9:0}] [L53] __VERIFIER_error() VAL [\old(N)=0, i=2, N=3, ret=-2147483647, ret2=-2147483647, ret5=0, temp=0, x={9:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 39 locations, 1 error locations. UNSAFE Result, 1.6s OverallTime, 11 OverallIterations, 9 TraceHistogramMax, 0.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 327 SDtfs, 186 SDslu, 554 SDs, 0 SdLazy, 448 SolverSat, 30 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 480 GetRequests, 430 SyntacticMatches, 7 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=64occurred in iteration=10, 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, 10 MinimizatonAttempts, 26 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 624 NumberOfCodeBlocks, 624 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 501 ConstructedInterpolants, 0 QuantifiedInterpolants, 58147 SizeOfPredicates, 12 NumberOfNonLiveVariables, 1683 ConjunctsInSsa, 41 ConjunctsInUnsatCore, 10 InterpolantComputations, 5 PerfectInterpolantSequences, 558/580 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...