./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/reducercommutativity/rangesum.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b5699aa Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_e5d74ce3-7760-4397-bd8c-d9e4c46a15f5/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_e5d74ce3-7760-4397-bd8c-d9e4c46a15f5/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_e5d74ce3-7760-4397-bd8c-d9e4c46a15f5/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_e5d74ce3-7760-4397-bd8c-d9e4c46a15f5/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/reducercommutativity/rangesum.i -s /tmp/vcloud-vcloud-master/worker/run_dir_e5d74ce3-7760-4397-bd8c-d9e4c46a15f5/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_e5d74ce3-7760-4397-bd8c-d9e4c46a15f5/bin/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 0.1.24-6b5699a [2019-11-25 08:53:34,033 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-25 08:53:34,036 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-25 08:53:34,052 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-25 08:53:34,053 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-25 08:53:34,054 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-25 08:53:34,056 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-25 08:53:34,066 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-25 08:53:34,072 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-25 08:53:34,075 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-25 08:53:34,076 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-25 08:53:34,077 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-25 08:53:34,077 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-25 08:53:34,078 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-25 08:53:34,079 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-25 08:53:34,080 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-25 08:53:34,081 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-25 08:53:34,082 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-25 08:53:34,086 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-25 08:53:34,090 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-25 08:53:34,094 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-25 08:53:34,098 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-25 08:53:34,099 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-25 08:53:34,100 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-25 08:53:34,103 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-25 08:53:34,104 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-25 08:53:34,104 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-25 08:53:34,106 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-25 08:53:34,106 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-25 08:53:34,107 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-25 08:53:34,108 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-25 08:53:34,109 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-25 08:53:34,110 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-25 08:53:34,110 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-25 08:53:34,112 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-25 08:53:34,112 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-25 08:53:34,113 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-25 08:53:34,113 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-25 08:53:34,114 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-25 08:53:34,114 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-25 08:53:34,116 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-25 08:53:34,117 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_e5d74ce3-7760-4397-bd8c-d9e4c46a15f5/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-25 08:53:34,146 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-25 08:53:34,146 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-25 08:53:34,148 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-25 08:53:34,148 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-25 08:53:34,148 INFO L138 SettingsManager]: * Use SBE=true [2019-11-25 08:53:34,148 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-25 08:53:34,149 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-25 08:53:34,149 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-25 08:53:34,149 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-25 08:53:34,149 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-25 08:53:34,149 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-25 08:53:34,150 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-25 08:53:34,150 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-25 08:53:34,150 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-25 08:53:34,150 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-25 08:53:34,150 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-25 08:53:34,151 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-25 08:53:34,151 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-25 08:53:34,151 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-25 08:53:34,151 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-25 08:53:34,152 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-25 08:53:34,152 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-25 08:53:34,152 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-25 08:53:34,152 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-25 08:53:34,153 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-25 08:53:34,153 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-25 08:53:34,153 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-25 08:53:34,153 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-25 08:53:34,153 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_e5d74ce3-7760-4397-bd8c-d9e4c46a15f5/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! 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 [2019-11-25 08:53:34,348 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-25 08:53:34,365 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-25 08:53:34,369 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-25 08:53:34,370 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-25 08:53:34,371 INFO L275 PluginConnector]: CDTParser initialized [2019-11-25 08:53:34,373 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_e5d74ce3-7760-4397-bd8c-d9e4c46a15f5/bin/uautomizer/../../sv-benchmarks/c/reducercommutativity/rangesum.i [2019-11-25 08:53:34,445 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_e5d74ce3-7760-4397-bd8c-d9e4c46a15f5/bin/uautomizer/data/d5a543eb0/26aa3bb1aa284592a909ce689018bf62/FLAG717eefa5a [2019-11-25 08:53:34,950 INFO L306 CDTParser]: Found 1 translation units. [2019-11-25 08:53:34,951 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_e5d74ce3-7760-4397-bd8c-d9e4c46a15f5/sv-benchmarks/c/reducercommutativity/rangesum.i [2019-11-25 08:53:34,959 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_e5d74ce3-7760-4397-bd8c-d9e4c46a15f5/bin/uautomizer/data/d5a543eb0/26aa3bb1aa284592a909ce689018bf62/FLAG717eefa5a [2019-11-25 08:53:35,355 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_e5d74ce3-7760-4397-bd8c-d9e4c46a15f5/bin/uautomizer/data/d5a543eb0/26aa3bb1aa284592a909ce689018bf62 [2019-11-25 08:53:35,360 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-25 08:53:35,361 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-25 08:53:35,365 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-25 08:53:35,366 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-25 08:53:35,369 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-25 08:53:35,370 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:53:35" (1/1) ... [2019-11-25 08:53:35,373 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19d98a87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:53:35, skipping insertion in model container [2019-11-25 08:53:35,373 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:53:35" (1/1) ... [2019-11-25 08:53:35,389 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-25 08:53:35,413 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-25 08:53:35,693 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-25 08:53:35,705 INFO L201 MainTranslator]: Completed pre-run [2019-11-25 08:53:35,746 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-25 08:53:35,761 INFO L205 MainTranslator]: Completed translation [2019-11-25 08:53:35,762 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:53:35 WrapperNode [2019-11-25 08:53:35,762 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-25 08:53:35,763 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-25 08:53:35,763 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-25 08:53:35,763 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-25 08:53:35,772 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:53:35" (1/1) ... [2019-11-25 08:53:35,781 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:53:35" (1/1) ... [2019-11-25 08:53:35,813 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-25 08:53:35,814 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-25 08:53:35,814 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-25 08:53:35,814 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-25 08:53:35,824 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:53:35" (1/1) ... [2019-11-25 08:53:35,825 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:53:35" (1/1) ... [2019-11-25 08:53:35,828 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:53:35" (1/1) ... [2019-11-25 08:53:35,829 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:53:35" (1/1) ... [2019-11-25 08:53:35,837 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:53:35" (1/1) ... [2019-11-25 08:53:35,842 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:53:35" (1/1) ... [2019-11-25 08:53:35,845 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:53:35" (1/1) ... [2019-11-25 08:53:35,849 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-25 08:53:35,849 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-25 08:53:35,849 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-25 08:53:35,850 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-25 08:53:35,851 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:53:35" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e5d74ce3-7760-4397-bd8c-d9e4c46a15f5/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-25 08:53:35,940 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-25 08:53:35,941 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-25 08:53:35,942 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-25 08:53:35,942 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-25 08:53:35,943 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-25 08:53:35,943 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-25 08:53:36,407 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-25 08:53:36,408 INFO L284 CfgBuilder]: Removed 17 assume(true) statements. [2019-11-25 08:53:36,409 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:53:36 BoogieIcfgContainer [2019-11-25 08:53:36,409 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-25 08:53:36,410 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-25 08:53:36,410 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-25 08:53:36,414 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-25 08:53:36,414 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:53:35" (1/3) ... [2019-11-25 08:53:36,415 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fcfff3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:53:36, skipping insertion in model container [2019-11-25 08:53:36,415 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:53:35" (2/3) ... [2019-11-25 08:53:36,416 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fcfff3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:53:36, skipping insertion in model container [2019-11-25 08:53:36,416 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:53:36" (3/3) ... [2019-11-25 08:53:36,418 INFO L109 eAbstractionObserver]: Analyzing ICFG rangesum.i [2019-11-25 08:53:36,428 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-25 08:53:36,438 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-25 08:53:36,449 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-25 08:53:36,475 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-25 08:53:36,475 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-25 08:53:36,476 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-25 08:53:36,476 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-25 08:53:36,476 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-25 08:53:36,476 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-25 08:53:36,476 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-25 08:53:36,476 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-25 08:53:36,494 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2019-11-25 08:53:36,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-25 08:53:36,501 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:53:36,502 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:53:36,502 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:53:36,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:53:36,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1829542603, now seen corresponding path program 1 times [2019-11-25 08:53:36,519 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:53:36,519 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711756066] [2019-11-25 08:53:36,520 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:53:36,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:36,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:53:36,671 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711756066] [2019-11-25 08:53:36,672 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:53:36,672 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-25 08:53:36,673 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448697361] [2019-11-25 08:53:36,678 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-25 08:53:36,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:53:36,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-25 08:53:36,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-25 08:53:36,696 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2019-11-25 08:53:36,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:53:36,718 INFO L93 Difference]: Finished difference Result 59 states and 90 transitions. [2019-11-25 08:53:36,718 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-25 08:53:36,719 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 18 [2019-11-25 08:53:36,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:53:36,730 INFO L225 Difference]: With dead ends: 59 [2019-11-25 08:53:36,730 INFO L226 Difference]: Without dead ends: 27 [2019-11-25 08:53:36,733 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-25 08:53:36,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-25 08:53:36,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-11-25 08:53:36,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-25 08:53:36,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2019-11-25 08:53:36,771 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 18 [2019-11-25 08:53:36,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:53:36,771 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2019-11-25 08:53:36,771 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-25 08:53:36,771 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2019-11-25 08:53:36,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-25 08:53:36,772 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:53:36,773 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:53:36,773 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:53:36,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:53:36,773 INFO L82 PathProgramCache]: Analyzing trace with hash -97699309, now seen corresponding path program 1 times [2019-11-25 08:53:36,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:53:36,774 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585566508] [2019-11-25 08:53:36,774 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:53:36,791 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-25 08:53:36,791 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1188355146] [2019-11-25 08:53:36,791 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e5d74ce3-7760-4397-bd8c-d9e4c46a15f5/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:53:36,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:36,922 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-25 08:53:36,928 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:53:36,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:53:36,950 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585566508] [2019-11-25 08:53:36,950 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-25 08:53:36,950 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188355146] [2019-11-25 08:53:36,951 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:53:36,951 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-25 08:53:36,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48215315] [2019-11-25 08:53:36,953 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-25 08:53:36,953 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:53:36,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-25 08:53:36,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-25 08:53:36,954 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand 3 states. [2019-11-25 08:53:37,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:53:37,037 INFO L93 Difference]: Finished difference Result 65 states and 90 transitions. [2019-11-25 08:53:37,038 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-25 08:53:37,039 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2019-11-25 08:53:37,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:53:37,040 INFO L225 Difference]: With dead ends: 65 [2019-11-25 08:53:37,040 INFO L226 Difference]: Without dead ends: 48 [2019-11-25 08:53:37,041 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-25 08:53:37,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-11-25 08:53:37,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 39. [2019-11-25 08:53:37,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-25 08:53:37,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 55 transitions. [2019-11-25 08:53:37,058 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 55 transitions. Word has length 18 [2019-11-25 08:53:37,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:53:37,058 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 55 transitions. [2019-11-25 08:53:37,059 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-25 08:53:37,059 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 55 transitions. [2019-11-25 08:53:37,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-25 08:53:37,062 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:53:37,062 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:53:37,267 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:53:37,268 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:53:37,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:53:37,268 INFO L82 PathProgramCache]: Analyzing trace with hash 840584081, now seen corresponding path program 1 times [2019-11-25 08:53:37,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:53:37,269 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354429591] [2019-11-25 08:53:37,269 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:53:37,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:37,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:53:37,476 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354429591] [2019-11-25 08:53:37,477 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:53:37,477 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-25 08:53:37,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688169626] [2019-11-25 08:53:37,478 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-25 08:53:37,478 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:53:37,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-25 08:53:37,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-25 08:53:37,479 INFO L87 Difference]: Start difference. First operand 39 states and 55 transitions. Second operand 8 states. [2019-11-25 08:53:37,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:53:37,588 INFO L93 Difference]: Finished difference Result 96 states and 125 transitions. [2019-11-25 08:53:37,589 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-25 08:53:37,589 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2019-11-25 08:53:37,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:53:37,591 INFO L225 Difference]: With dead ends: 96 [2019-11-25 08:53:37,591 INFO L226 Difference]: Without dead ends: 91 [2019-11-25 08:53:37,592 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-11-25 08:53:37,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-11-25 08:53:37,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 59. [2019-11-25 08:53:37,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-11-25 08:53:37,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 84 transitions. [2019-11-25 08:53:37,605 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 84 transitions. Word has length 18 [2019-11-25 08:53:37,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:53:37,606 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 84 transitions. [2019-11-25 08:53:37,606 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-25 08:53:37,606 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 84 transitions. [2019-11-25 08:53:37,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-25 08:53:37,608 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:53:37,608 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:53:37,608 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:53:37,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:53:37,609 INFO L82 PathProgramCache]: Analyzing trace with hash -995174774, now seen corresponding path program 1 times [2019-11-25 08:53:37,609 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:53:37,609 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506076077] [2019-11-25 08:53:37,610 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:53:37,635 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-25 08:53:37,635 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1929527477] [2019-11-25 08:53:37,636 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e5d74ce3-7760-4397-bd8c-d9e4c46a15f5/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:53:37,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:37,714 INFO L255 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-25 08:53:37,716 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:53:37,749 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-25 08:53:37,750 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506076077] [2019-11-25 08:53:37,751 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-25 08:53:37,751 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929527477] [2019-11-25 08:53:37,751 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:53:37,752 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-25 08:53:37,752 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903068481] [2019-11-25 08:53:37,754 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-25 08:53:37,754 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:53:37,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-25 08:53:37,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-25 08:53:37,755 INFO L87 Difference]: Start difference. First operand 59 states and 84 transitions. Second operand 3 states. [2019-11-25 08:53:37,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:53:37,816 INFO L93 Difference]: Finished difference Result 115 states and 165 transitions. [2019-11-25 08:53:37,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-25 08:53:37,817 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2019-11-25 08:53:37,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:53:37,820 INFO L225 Difference]: With dead ends: 115 [2019-11-25 08:53:37,820 INFO L226 Difference]: Without dead ends: 61 [2019-11-25 08:53:37,821 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-25 08:53:37,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-11-25 08:53:37,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2019-11-25 08:53:37,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-11-25 08:53:37,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 85 transitions. [2019-11-25 08:53:37,831 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 85 transitions. Word has length 21 [2019-11-25 08:53:37,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:53:37,831 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 85 transitions. [2019-11-25 08:53:37,832 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-25 08:53:37,832 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 85 transitions. [2019-11-25 08:53:37,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-25 08:53:37,833 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:53:37,833 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:53:38,044 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:53:38,044 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:53:38,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:53:38,045 INFO L82 PathProgramCache]: Analyzing trace with hash -2100366548, now seen corresponding path program 1 times [2019-11-25 08:53:38,045 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:53:38,045 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74980232] [2019-11-25 08:53:38,045 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:53:38,073 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-25 08:53:38,073 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [15212128] [2019-11-25 08:53:38,073 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e5d74ce3-7760-4397-bd8c-d9e4c46a15f5/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:53:38,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:38,158 INFO L255 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-25 08:53:38,163 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:53:38,203 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-25 08:53:38,206 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74980232] [2019-11-25 08:53:38,206 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-25 08:53:38,207 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15212128] [2019-11-25 08:53:38,207 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-25 08:53:38,208 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-11-25 08:53:38,208 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108045102] [2019-11-25 08:53:38,209 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-25 08:53:38,209 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:53:38,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-25 08:53:38,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-25 08:53:38,210 INFO L87 Difference]: Start difference. First operand 60 states and 85 transitions. Second operand 4 states. [2019-11-25 08:53:38,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:53:38,428 INFO L93 Difference]: Finished difference Result 117 states and 167 transitions. [2019-11-25 08:53:38,429 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-25 08:53:38,429 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2019-11-25 08:53:38,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:53:38,430 INFO L225 Difference]: With dead ends: 117 [2019-11-25 08:53:38,430 INFO L226 Difference]: Without dead ends: 63 [2019-11-25 08:53:38,431 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-25 08:53:38,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-11-25 08:53:38,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2019-11-25 08:53:38,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-11-25 08:53:38,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 87 transitions. [2019-11-25 08:53:38,439 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 87 transitions. Word has length 23 [2019-11-25 08:53:38,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:53:38,444 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 87 transitions. [2019-11-25 08:53:38,445 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-25 08:53:38,445 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 87 transitions. [2019-11-25 08:53:38,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-25 08:53:38,453 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:53:38,453 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:53:38,656 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:53:38,656 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:53:38,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:53:38,657 INFO L82 PathProgramCache]: Analyzing trace with hash 962228046, now seen corresponding path program 2 times [2019-11-25 08:53:38,657 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:53:38,657 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539213922] [2019-11-25 08:53:38,657 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:53:38,685 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-25 08:53:38,685 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1728913398] [2019-11-25 08:53:38,685 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e5d74ce3-7760-4397-bd8c-d9e4c46a15f5/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:53:38,776 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-11-25 08:53:38,776 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:53:38,778 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-25 08:53:38,780 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:53:38,817 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-25 08:53:38,818 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539213922] [2019-11-25 08:53:38,818 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-25 08:53:38,818 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728913398] [2019-11-25 08:53:38,818 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:53:38,818 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-25 08:53:38,819 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678436300] [2019-11-25 08:53:38,819 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-25 08:53:38,819 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:53:38,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-25 08:53:38,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-25 08:53:38,820 INFO L87 Difference]: Start difference. First operand 62 states and 87 transitions. Second operand 4 states. [2019-11-25 08:53:38,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:53:38,952 INFO L93 Difference]: Finished difference Result 127 states and 183 transitions. [2019-11-25 08:53:38,953 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-25 08:53:38,954 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2019-11-25 08:53:38,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:53:38,955 INFO L225 Difference]: With dead ends: 127 [2019-11-25 08:53:38,955 INFO L226 Difference]: Without dead ends: 77 [2019-11-25 08:53:38,956 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-25 08:53:38,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-11-25 08:53:38,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 72. [2019-11-25 08:53:38,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-11-25 08:53:38,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 97 transitions. [2019-11-25 08:53:38,978 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 97 transitions. Word has length 25 [2019-11-25 08:53:38,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:53:38,980 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 97 transitions. [2019-11-25 08:53:38,980 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-25 08:53:38,980 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 97 transitions. [2019-11-25 08:53:38,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-25 08:53:38,981 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:53:38,982 INFO L410 BasicCegarLoop]: trace histogram [2, 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] [2019-11-25 08:53:39,185 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:53:39,186 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:53:39,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:53:39,186 INFO L82 PathProgramCache]: Analyzing trace with hash -1979262774, now seen corresponding path program 1 times [2019-11-25 08:53:39,187 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:53:39,187 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702274119] [2019-11-25 08:53:39,187 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:53:39,208 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-25 08:53:39,209 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [725753593] [2019-11-25 08:53:39,209 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e5d74ce3-7760-4397-bd8c-d9e4c46a15f5/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:53:39,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:39,310 INFO L255 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-25 08:53:39,313 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:53:39,350 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-25 08:53:39,352 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702274119] [2019-11-25 08:53:39,352 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-25 08:53:39,353 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725753593] [2019-11-25 08:53:39,353 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-25 08:53:39,353 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-25 08:53:39,353 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117478621] [2019-11-25 08:53:39,354 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-25 08:53:39,354 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:53:39,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-25 08:53:39,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-25 08:53:39,355 INFO L87 Difference]: Start difference. First operand 72 states and 97 transitions. Second operand 5 states. [2019-11-25 08:53:39,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:53:39,518 INFO L93 Difference]: Finished difference Result 150 states and 206 transitions. [2019-11-25 08:53:39,520 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-25 08:53:39,520 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2019-11-25 08:53:39,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:53:39,522 INFO L225 Difference]: With dead ends: 150 [2019-11-25 08:53:39,522 INFO L226 Difference]: Without dead ends: 92 [2019-11-25 08:53:39,523 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-25 08:53:39,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-11-25 08:53:39,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 87. [2019-11-25 08:53:39,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-11-25 08:53:39,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 112 transitions. [2019-11-25 08:53:39,535 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 112 transitions. Word has length 34 [2019-11-25 08:53:39,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:53:39,535 INFO L462 AbstractCegarLoop]: Abstraction has 87 states and 112 transitions. [2019-11-25 08:53:39,535 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-25 08:53:39,536 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 112 transitions. [2019-11-25 08:53:39,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-11-25 08:53:39,537 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:53:39,538 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:53:39,744 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:53:39,744 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:53:39,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:53:39,745 INFO L82 PathProgramCache]: Analyzing trace with hash -387145522, now seen corresponding path program 2 times [2019-11-25 08:53:39,745 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:53:39,745 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786787401] [2019-11-25 08:53:39,746 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:53:39,787 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-25 08:53:39,788 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [883442118] [2019-11-25 08:53:39,788 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e5d74ce3-7760-4397-bd8c-d9e4c46a15f5/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:53:39,845 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-11-25 08:53:39,846 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:53:39,847 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-25 08:53:39,850 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:53:39,878 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-11-25 08:53:39,878 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786787401] [2019-11-25 08:53:39,879 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-25 08:53:39,879 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883442118] [2019-11-25 08:53:39,879 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:53:39,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-25 08:53:39,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992170561] [2019-11-25 08:53:39,881 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-25 08:53:39,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:53:39,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-25 08:53:39,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-25 08:53:39,882 INFO L87 Difference]: Start difference. First operand 87 states and 112 transitions. Second operand 4 states. [2019-11-25 08:53:39,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:53:39,949 INFO L93 Difference]: Finished difference Result 122 states and 156 transitions. [2019-11-25 08:53:39,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-25 08:53:39,950 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 43 [2019-11-25 08:53:39,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:53:39,952 INFO L225 Difference]: With dead ends: 122 [2019-11-25 08:53:39,952 INFO L226 Difference]: Without dead ends: 91 [2019-11-25 08:53:39,953 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-25 08:53:39,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-11-25 08:53:39,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 89. [2019-11-25 08:53:39,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-11-25 08:53:39,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 114 transitions. [2019-11-25 08:53:39,964 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 114 transitions. Word has length 43 [2019-11-25 08:53:39,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:53:39,964 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 114 transitions. [2019-11-25 08:53:39,964 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-25 08:53:39,965 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 114 transitions. [2019-11-25 08:53:39,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-25 08:53:39,966 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:53:39,967 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:53:40,170 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:53:40,170 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:53:40,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:53:40,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1297182544, now seen corresponding path program 1 times [2019-11-25 08:53:40,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:53:40,171 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19586305] [2019-11-25 08:53:40,171 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:53:40,194 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-25 08:53:40,195 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1119799360] [2019-11-25 08:53:40,195 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e5d74ce3-7760-4397-bd8c-d9e4c46a15f5/bin/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 [2019-11-25 08:53:40,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:40,280 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-25 08:53:40,283 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:53:40,381 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-25 08:53:40,381 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19586305] [2019-11-25 08:53:40,382 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-25 08:53:40,382 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119799360] [2019-11-25 08:53:40,382 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-25 08:53:40,382 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-11-25 08:53:40,383 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156509686] [2019-11-25 08:53:40,383 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-25 08:53:40,384 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:53:40,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-25 08:53:40,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-11-25 08:53:40,384 INFO L87 Difference]: Start difference. First operand 89 states and 114 transitions. Second operand 9 states. [2019-11-25 08:53:40,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:53:40,613 INFO L93 Difference]: Finished difference Result 197 states and 250 transitions. [2019-11-25 08:53:40,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-25 08:53:40,613 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 45 [2019-11-25 08:53:40,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:53:40,615 INFO L225 Difference]: With dead ends: 197 [2019-11-25 08:53:40,615 INFO L226 Difference]: Without dead ends: 92 [2019-11-25 08:53:40,616 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2019-11-25 08:53:40,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-11-25 08:53:40,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2019-11-25 08:53:40,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-11-25 08:53:40,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 116 transitions. [2019-11-25 08:53:40,630 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 116 transitions. Word has length 45 [2019-11-25 08:53:40,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:53:40,630 INFO L462 AbstractCegarLoop]: Abstraction has 91 states and 116 transitions. [2019-11-25 08:53:40,630 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-25 08:53:40,630 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 116 transitions. [2019-11-25 08:53:40,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-25 08:53:40,635 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:53:40,636 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:53:40,840 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:53:40,840 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:53:40,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:53:40,841 INFO L82 PathProgramCache]: Analyzing trace with hash -3446958, now seen corresponding path program 2 times [2019-11-25 08:53:40,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:53:40,844 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876415714] [2019-11-25 08:53:40,850 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:53:40,879 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-25 08:53:40,887 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1855093172] [2019-11-25 08:53:40,887 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e5d74ce3-7760-4397-bd8c-d9e4c46a15f5/bin/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 [2019-11-25 08:53:40,970 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-25 08:53:40,970 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:53:40,971 INFO L255 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-25 08:53:40,978 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:53:41,056 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-25 08:53:41,060 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876415714] [2019-11-25 08:53:41,060 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-25 08:53:41,060 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855093172] [2019-11-25 08:53:41,061 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-25 08:53:41,061 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-11-25 08:53:41,061 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221729456] [2019-11-25 08:53:41,062 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-25 08:53:41,064 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:53:41,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-25 08:53:41,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-11-25 08:53:41,065 INFO L87 Difference]: Start difference. First operand 91 states and 116 transitions. Second operand 9 states. [2019-11-25 08:53:41,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:53:41,274 INFO L93 Difference]: Finished difference Result 171 states and 219 transitions. [2019-11-25 08:53:41,274 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-25 08:53:41,274 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 47 [2019-11-25 08:53:41,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:53:41,276 INFO L225 Difference]: With dead ends: 171 [2019-11-25 08:53:41,276 INFO L226 Difference]: Without dead ends: 116 [2019-11-25 08:53:41,276 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2019-11-25 08:53:41,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2019-11-25 08:53:41,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 99. [2019-11-25 08:53:41,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-11-25 08:53:41,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 124 transitions. [2019-11-25 08:53:41,286 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 124 transitions. Word has length 47 [2019-11-25 08:53:41,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:53:41,286 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 124 transitions. [2019-11-25 08:53:41,287 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-25 08:53:41,287 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 124 transitions. [2019-11-25 08:53:41,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-11-25 08:53:41,288 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:53:41,288 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:53:41,492 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:53:41,492 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:53:41,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:53:41,493 INFO L82 PathProgramCache]: Analyzing trace with hash -384159915, now seen corresponding path program 1 times [2019-11-25 08:53:41,493 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:53:41,493 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357724471] [2019-11-25 08:53:41,494 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:53:41,512 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-25 08:53:41,512 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [890440414] [2019-11-25 08:53:41,513 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e5d74ce3-7760-4397-bd8c-d9e4c46a15f5/bin/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 [2019-11-25 08:53:41,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:41,603 INFO L255 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-25 08:53:41,605 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:53:41,655 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-25 08:53:41,655 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357724471] [2019-11-25 08:53:41,655 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-25 08:53:41,655 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890440414] [2019-11-25 08:53:41,655 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-25 08:53:41,656 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-11-25 08:53:41,656 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138406521] [2019-11-25 08:53:41,656 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-25 08:53:41,656 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:53:41,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-25 08:53:41,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-25 08:53:41,657 INFO L87 Difference]: Start difference. First operand 99 states and 124 transitions. Second operand 8 states. [2019-11-25 08:53:41,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:53:41,785 INFO L93 Difference]: Finished difference Result 138 states and 172 transitions. [2019-11-25 08:53:41,785 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-25 08:53:41,785 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 53 [2019-11-25 08:53:41,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:53:41,786 INFO L225 Difference]: With dead ends: 138 [2019-11-25 08:53:41,787 INFO L226 Difference]: Without dead ends: 105 [2019-11-25 08:53:41,787 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-11-25 08:53:41,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-11-25 08:53:41,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 103. [2019-11-25 08:53:41,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-11-25 08:53:41,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 128 transitions. [2019-11-25 08:53:41,803 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 128 transitions. Word has length 53 [2019-11-25 08:53:41,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:53:41,804 INFO L462 AbstractCegarLoop]: Abstraction has 103 states and 128 transitions. [2019-11-25 08:53:41,804 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-25 08:53:41,804 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 128 transitions. [2019-11-25 08:53:41,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-11-25 08:53:41,805 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:53:41,805 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:53:42,005 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:53:42,006 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:53:42,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:53:42,006 INFO L82 PathProgramCache]: Analyzing trace with hash -1685231241, now seen corresponding path program 2 times [2019-11-25 08:53:42,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:53:42,006 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405045137] [2019-11-25 08:53:42,007 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:53:42,028 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-25 08:53:42,042 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1755176002] [2019-11-25 08:53:42,042 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e5d74ce3-7760-4397-bd8c-d9e4c46a15f5/bin/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 [2019-11-25 08:53:42,120 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-25 08:53:42,120 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:53:42,122 INFO L255 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-25 08:53:42,124 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:53:42,233 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-25 08:53:42,234 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405045137] [2019-11-25 08:53:42,234 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-25 08:53:42,234 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755176002] [2019-11-25 08:53:42,234 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-25 08:53:42,234 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-11-25 08:53:42,234 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475248643] [2019-11-25 08:53:42,235 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-25 08:53:42,235 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:53:42,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-25 08:53:42,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-11-25 08:53:42,236 INFO L87 Difference]: Start difference. First operand 103 states and 128 transitions. Second operand 10 states. [2019-11-25 08:53:42,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:53:42,502 INFO L93 Difference]: Finished difference Result 272 states and 342 transitions. [2019-11-25 08:53:42,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-25 08:53:42,503 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 55 [2019-11-25 08:53:42,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:53:42,505 INFO L225 Difference]: With dead ends: 272 [2019-11-25 08:53:42,505 INFO L226 Difference]: Without dead ends: 187 [2019-11-25 08:53:42,506 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2019-11-25 08:53:42,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2019-11-25 08:53:42,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 175. [2019-11-25 08:53:42,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2019-11-25 08:53:42,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 211 transitions. [2019-11-25 08:53:42,523 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 211 transitions. Word has length 55 [2019-11-25 08:53:42,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:53:42,525 INFO L462 AbstractCegarLoop]: Abstraction has 175 states and 211 transitions. [2019-11-25 08:53:42,525 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-25 08:53:42,525 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 211 transitions. [2019-11-25 08:53:42,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-11-25 08:53:42,527 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:53:42,527 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:53:42,734 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:53:42,734 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:53:42,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:53:42,734 INFO L82 PathProgramCache]: Analyzing trace with hash -1875846409, now seen corresponding path program 1 times [2019-11-25 08:53:42,735 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:53:42,735 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434441961] [2019-11-25 08:53:42,735 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:53:42,746 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-25 08:53:42,747 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [547329243] [2019-11-25 08:53:42,747 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e5d74ce3-7760-4397-bd8c-d9e4c46a15f5/bin/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 [2019-11-25 08:53:42,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:53:42,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:53:42,981 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-25 08:53:42,981 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-25 08:53:43,186 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:53:43,269 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 08:53:43 BoogieIcfgContainer [2019-11-25 08:53:43,269 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-25 08:53:43,270 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-25 08:53:43,270 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-25 08:53:43,270 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-25 08:53:43,270 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:53:36" (3/4) ... [2019-11-25 08:53:43,273 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-25 08:53:43,366 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_e5d74ce3-7760-4397-bd8c-d9e4c46a15f5/bin/uautomizer/witness.graphml [2019-11-25 08:53:43,367 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-25 08:53:43,369 INFO L168 Benchmark]: Toolchain (without parser) took 8006.94 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 175.1 MB). Free memory was 948.7 MB in the beginning and 917.1 MB in the end (delta: 31.6 MB). Peak memory consumption was 206.7 MB. Max. memory is 11.5 GB. [2019-11-25 08:53:43,369 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-25 08:53:43,370 INFO L168 Benchmark]: CACSL2BoogieTranslator took 397.01 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 175.1 MB). Free memory was 948.7 MB in the beginning and 1.2 GB in the end (delta: -220.1 MB). Peak memory consumption was 22.5 MB. Max. memory is 11.5 GB. [2019-11-25 08:53:43,371 INFO L168 Benchmark]: Boogie Procedure Inliner took 51.01 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-11-25 08:53:43,371 INFO L168 Benchmark]: Boogie Preprocessor took 34.89 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-25 08:53:43,371 INFO L168 Benchmark]: RCFGBuilder took 560.13 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 22.4 MB). Peak memory consumption was 22.4 MB. Max. memory is 11.5 GB. [2019-11-25 08:53:43,372 INFO L168 Benchmark]: TraceAbstraction took 6858.51 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 923.8 MB in the end (delta: 217.3 MB). Peak memory consumption was 217.3 MB. Max. memory is 11.5 GB. [2019-11-25 08:53:43,372 INFO L168 Benchmark]: Witness Printer took 97.12 ms. Allocated memory is still 1.2 GB. Free memory was 923.8 MB in the beginning and 917.1 MB in the end (delta: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. [2019-11-25 08:53:43,375 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 397.01 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 175.1 MB). Free memory was 948.7 MB in the beginning and 1.2 GB in the end (delta: -220.1 MB). Peak memory consumption was 22.5 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 51.01 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 34.89 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 560.13 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 22.4 MB). Peak memory consumption was 22.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 6858.51 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 923.8 MB in the end (delta: 217.3 MB). Peak memory consumption was 217.3 MB. Max. memory is 11.5 GB. * Witness Printer took 97.12 ms. Allocated memory is still 1.2 GB. Free memory was 923.8 MB in the beginning and 917.1 MB in the end (delta: 6.7 MB). Peak memory consumption was 6.7 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 [N=0] [L32] N = __VERIFIER_nondet_int() [L33] COND TRUE N > 1 [L34] int x[N]; [L6] int i; [L7] i = 0 VAL [N=3] [L7] COND TRUE i < N [L8] x[i] = __VERIFIER_nondet_int() [L7] i++ VAL [N=3] [L7] COND TRUE i < N [L8] x[i] = __VERIFIER_nondet_int() [L7] i++ VAL [N=3] [L7] COND TRUE i < N [L8] x[i] = __VERIFIER_nondet_int() [L7] i++ VAL [N=3] [L7] COND FALSE !(i < N) VAL [N=3] [L36] int temp; [L37] int ret; [L38] int ret2; [L39] int ret5; [L14] int i; [L15] long long ret; [L16] ret = 0 [L17] int cnt = 0; [L18] i = 0 VAL [N=3] [L18] COND TRUE i < N VAL [N=3] [L19] COND FALSE !(i > N/2) VAL [N=3] [L18] i++ VAL [N=3] [L18] COND TRUE i < N VAL [N=3] [L19] COND FALSE !(i > N/2) VAL [N=3] [L18] i++ VAL [N=3] [L18] COND TRUE i < N VAL [N=3] [L19] COND TRUE i > N/2 [L20] EXPR x[i] [L20] ret = ret + x[i] [L21] cnt = cnt + 1 VAL [N=3] [L18] i++ VAL [N=3] [L18] COND FALSE !(i < N) VAL [N=3] [L24] COND TRUE cnt !=0 [L25] return ret / cnt; VAL [N=3] [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 [L14] int i; [L15] long long ret; [L16] ret = 0 [L17] int cnt = 0; [L18] i = 0 VAL [N=3] [L18] COND TRUE i < N VAL [N=3] [L19] COND FALSE !(i > N/2) VAL [N=3] [L18] i++ VAL [N=3] [L18] COND TRUE i < N VAL [N=3] [L19] COND FALSE !(i > N/2) VAL [N=3] [L18] i++ VAL [N=3] [L18] COND TRUE i < N VAL [N=3] [L19] COND TRUE i > N/2 [L20] EXPR x[i] [L20] ret = ret + x[i] [L21] cnt = cnt + 1 VAL [N=3] [L18] i++ VAL [N=3] [L18] COND FALSE !(i < N) VAL [N=3] [L24] COND TRUE cnt !=0 [L25] return ret / cnt; VAL [N=3] [L44] ret2 = rangesum(x) [L45] EXPR x[0] [L45] temp=x[0] [L46] int i =0 ; VAL [N=3] [L46] COND TRUE i N/2) VAL [N=3] [L18] i++ VAL [N=3] [L18] COND TRUE i < N VAL [N=3] [L19] COND FALSE !(i > N/2) VAL [N=3] [L18] i++ VAL [N=3] [L18] COND TRUE i < N VAL [N=3] [L19] COND TRUE i > N/2 [L20] EXPR x[i] [L20] ret = ret + x[i] [L21] cnt = cnt + 1 VAL [N=3] [L18] i++ VAL [N=3] [L18] COND FALSE !(i < N) VAL [N=3] [L24] COND TRUE cnt !=0 [L25] return ret / cnt; VAL [N=3] [L50] ret5 = rangesum(x) [L52] COND TRUE ret != ret2 || ret !=ret5 VAL [N=3] [L53] __VERIFIER_error() VAL [N=3] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 32 locations, 1 error locations. Result: UNSAFE, OverallTime: 6.7s, OverallIterations: 13, TraceHistogramMax: 3, AutomataDifference: 1.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 302 SDtfs, 579 SDslu, 411 SDs, 0 SdLazy, 718 SolverSat, 121 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 380 GetRequests, 319 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=175occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 12 MinimizatonAttempts, 87 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 455 NumberOfCodeBlocks, 423 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 388 ConstructedInterpolants, 0 QuantifiedInterpolants, 37966 SizeOfPredicates, 22 NumberOfNonLiveVariables, 1412 ConjunctsInSsa, 53 ConjunctsInUnsatCore, 12 InterpolantComputations, 6 PerfectInterpolantSequences, 168/199 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...