./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/loops/string_false-unreach-call_true-termination.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 1dbac8bc Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_28df22f5-a356-4cbb-8582-4243ffdffc1d/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_28df22f5-a356-4cbb-8582-4243ffdffc1d/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_28df22f5-a356-4cbb-8582-4243ffdffc1d/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_28df22f5-a356-4cbb-8582-4243ffdffc1d/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops/string_false-unreach-call_true-termination.i -s /tmp/vcloud-vcloud-master/worker/working_dir_28df22f5-a356-4cbb-8582-4243ffdffc1d/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_28df22f5-a356-4cbb-8582-4243ffdffc1d/bin-2019/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 77cd31699320cd40da64f32a92959020d19291bd .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_28df22f5-a356-4cbb-8582-4243ffdffc1d/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_28df22f5-a356-4cbb-8582-4243ffdffc1d/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_28df22f5-a356-4cbb-8582-4243ffdffc1d/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_28df22f5-a356-4cbb-8582-4243ffdffc1d/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops/string_false-unreach-call_true-termination.i -s /tmp/vcloud-vcloud-master/worker/working_dir_28df22f5-a356-4cbb-8582-4243ffdffc1d/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_28df22f5-a356-4cbb-8582-4243ffdffc1d/bin-2019/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 77cd31699320cd40da64f32a92959020d19291bd ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.23-1dbac8b [2018-11-10 07:20:10,432 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-10 07:20:10,433 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-10 07:20:10,440 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-10 07:20:10,441 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-10 07:20:10,441 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-10 07:20:10,442 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-10 07:20:10,442 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-10 07:20:10,443 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-10 07:20:10,444 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-10 07:20:10,444 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-10 07:20:10,445 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-10 07:20:10,445 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-10 07:20:10,446 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-10 07:20:10,447 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-10 07:20:10,447 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-10 07:20:10,448 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-10 07:20:10,449 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-10 07:20:10,450 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-10 07:20:10,451 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-10 07:20:10,451 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-10 07:20:10,452 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-10 07:20:10,454 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-10 07:20:10,454 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-10 07:20:10,454 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-10 07:20:10,455 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-10 07:20:10,455 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-10 07:20:10,456 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-10 07:20:10,456 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-10 07:20:10,457 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-10 07:20:10,457 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-10 07:20:10,457 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-10 07:20:10,458 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-10 07:20:10,458 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-10 07:20:10,458 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-10 07:20:10,459 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-10 07:20:10,459 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_28df22f5-a356-4cbb-8582-4243ffdffc1d/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-11-10 07:20:10,466 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-10 07:20:10,466 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-10 07:20:10,467 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-10 07:20:10,467 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-11-10 07:20:10,467 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-10 07:20:10,468 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-10 07:20:10,468 INFO L133 SettingsManager]: * Use SBE=true [2018-11-10 07:20:10,468 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-10 07:20:10,468 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-10 07:20:10,468 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-10 07:20:10,468 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-10 07:20:10,468 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-10 07:20:10,469 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-10 07:20:10,469 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-10 07:20:10,469 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-10 07:20:10,469 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-10 07:20:10,469 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-10 07:20:10,469 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-10 07:20:10,469 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-10 07:20:10,470 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-10 07:20:10,470 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-10 07:20:10,470 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-10 07:20:10,470 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-10 07:20:10,470 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-10 07:20:10,470 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-10 07:20:10,470 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-10 07:20:10,470 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-10 07:20:10,471 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-10 07:20:10,471 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-10 07:20:10,471 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/working_dir_28df22f5-a356-4cbb-8582-4243ffdffc1d/bin-2019/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 77cd31699320cd40da64f32a92959020d19291bd [2018-11-10 07:20:10,495 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-10 07:20:10,504 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-10 07:20:10,507 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-10 07:20:10,508 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-10 07:20:10,508 INFO L276 PluginConnector]: CDTParser initialized [2018-11-10 07:20:10,509 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_28df22f5-a356-4cbb-8582-4243ffdffc1d/bin-2019/uautomizer/../../sv-benchmarks/c/loops/string_false-unreach-call_true-termination.i [2018-11-10 07:20:10,554 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_28df22f5-a356-4cbb-8582-4243ffdffc1d/bin-2019/uautomizer/data/c938c60ab/780f2e0fc64c4b3a80e561f58082373e/FLAG1b34a9a2e [2018-11-10 07:20:10,940 INFO L298 CDTParser]: Found 1 translation units. [2018-11-10 07:20:10,940 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_28df22f5-a356-4cbb-8582-4243ffdffc1d/sv-benchmarks/c/loops/string_false-unreach-call_true-termination.i [2018-11-10 07:20:10,944 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_28df22f5-a356-4cbb-8582-4243ffdffc1d/bin-2019/uautomizer/data/c938c60ab/780f2e0fc64c4b3a80e561f58082373e/FLAG1b34a9a2e [2018-11-10 07:20:10,954 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_28df22f5-a356-4cbb-8582-4243ffdffc1d/bin-2019/uautomizer/data/c938c60ab/780f2e0fc64c4b3a80e561f58082373e [2018-11-10 07:20:10,956 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-10 07:20:10,958 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-10 07:20:10,958 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-10 07:20:10,958 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-10 07:20:10,961 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-10 07:20:10,962 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 07:20:10" (1/1) ... [2018-11-10 07:20:10,964 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10835ac7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 07:20:10, skipping insertion in model container [2018-11-10 07:20:10,964 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 07:20:10" (1/1) ... [2018-11-10 07:20:10,971 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-10 07:20:10,984 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-10 07:20:11,086 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 07:20:11,088 INFO L189 MainTranslator]: Completed pre-run [2018-11-10 07:20:11,103 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 07:20:11,116 INFO L193 MainTranslator]: Completed translation [2018-11-10 07:20:11,116 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 07:20:11 WrapperNode [2018-11-10 07:20:11,117 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-10 07:20:11,117 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-10 07:20:11,117 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-10 07:20:11,117 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-10 07:20:11,125 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 07:20:11" (1/1) ... [2018-11-10 07:20:11,125 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 07:20:11" (1/1) ... [2018-11-10 07:20:11,131 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 07:20:11" (1/1) ... [2018-11-10 07:20:11,131 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 07:20:11" (1/1) ... [2018-11-10 07:20:11,137 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 07:20:11" (1/1) ... [2018-11-10 07:20:11,142 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 07:20:11" (1/1) ... [2018-11-10 07:20:11,143 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 07:20:11" (1/1) ... [2018-11-10 07:20:11,145 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-10 07:20:11,145 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-10 07:20:11,145 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-10 07:20:11,146 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-10 07:20:11,146 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 07:20:11" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_28df22f5-a356-4cbb-8582-4243ffdffc1d/bin-2019/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-10 07:20:11,226 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-10 07:20:11,226 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-10 07:20:11,227 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-11-10 07:20:11,227 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-10 07:20:11,227 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-11-10 07:20:11,227 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2018-11-10 07:20:11,227 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-11-10 07:20:11,227 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2018-11-10 07:20:11,227 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-10 07:20:11,227 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-11-10 07:20:11,227 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-11-10 07:20:11,228 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2018-11-10 07:20:11,228 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-11-10 07:20:11,228 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-10 07:20:11,228 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-10 07:20:11,228 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2018-11-10 07:20:11,437 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-10 07:20:11,437 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 07:20:11 BoogieIcfgContainer [2018-11-10 07:20:11,438 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-10 07:20:11,438 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-10 07:20:11,438 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-10 07:20:11,441 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-10 07:20:11,441 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 07:20:10" (1/3) ... [2018-11-10 07:20:11,442 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ea6d08f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 07:20:11, skipping insertion in model container [2018-11-10 07:20:11,442 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 07:20:11" (2/3) ... [2018-11-10 07:20:11,442 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ea6d08f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 07:20:11, skipping insertion in model container [2018-11-10 07:20:11,443 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 07:20:11" (3/3) ... [2018-11-10 07:20:11,444 INFO L112 eAbstractionObserver]: Analyzing ICFG string_false-unreach-call_true-termination.i [2018-11-10 07:20:11,453 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-10 07:20:11,459 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-10 07:20:11,474 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-10 07:20:11,500 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-11-10 07:20:11,501 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-10 07:20:11,501 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-10 07:20:11,501 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-10 07:20:11,501 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-10 07:20:11,501 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-10 07:20:11,502 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-10 07:20:11,502 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-10 07:20:11,502 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-10 07:20:11,518 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states. [2018-11-10 07:20:11,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-11-10 07:20:11,524 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:20:11,525 INFO L375 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, 1] [2018-11-10 07:20:11,526 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 07:20:11,531 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:20:11,531 INFO L82 PathProgramCache]: Analyzing trace with hash 308783607, now seen corresponding path program 1 times [2018-11-10 07:20:11,533 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 07:20:11,533 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 07:20:11,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:20:11,574 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 07:20:11,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:20:11,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:20:11,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 07:20:11,636 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 07:20:11,637 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-10 07:20:11,640 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-10 07:20:11,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-10 07:20:11,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-10 07:20:11,652 INFO L87 Difference]: Start difference. First operand 64 states. Second operand 2 states. [2018-11-10 07:20:11,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 07:20:11,673 INFO L93 Difference]: Finished difference Result 115 states and 142 transitions. [2018-11-10 07:20:11,673 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-10 07:20:11,674 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 24 [2018-11-10 07:20:11,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 07:20:11,680 INFO L225 Difference]: With dead ends: 115 [2018-11-10 07:20:11,680 INFO L226 Difference]: Without dead ends: 41 [2018-11-10 07:20:11,682 INFO L605 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 [2018-11-10 07:20:11,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-11-10 07:20:11,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-11-10 07:20:11,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-11-10 07:20:11,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2018-11-10 07:20:11,704 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 24 [2018-11-10 07:20:11,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 07:20:11,704 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2018-11-10 07:20:11,704 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-10 07:20:11,705 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2018-11-10 07:20:11,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-11-10 07:20:11,706 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:20:11,706 INFO L375 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, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 07:20:11,706 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 07:20:11,706 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:20:11,706 INFO L82 PathProgramCache]: Analyzing trace with hash -598303112, now seen corresponding path program 1 times [2018-11-10 07:20:11,707 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 07:20:11,707 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 07:20:11,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:20:11,708 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 07:20:11,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:20:11,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:20:11,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 07:20:11,747 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 07:20:11,747 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-10 07:20:11,748 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-10 07:20:11,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-10 07:20:11,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-10 07:20:11,749 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand 3 states. [2018-11-10 07:20:11,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 07:20:11,826 INFO L93 Difference]: Finished difference Result 86 states and 99 transitions. [2018-11-10 07:20:11,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-10 07:20:11,827 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2018-11-10 07:20:11,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 07:20:11,829 INFO L225 Difference]: With dead ends: 86 [2018-11-10 07:20:11,829 INFO L226 Difference]: Without dead ends: 58 [2018-11-10 07:20:11,830 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-10 07:20:11,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-11-10 07:20:11,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 45. [2018-11-10 07:20:11,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-11-10 07:20:11,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2018-11-10 07:20:11,837 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 31 [2018-11-10 07:20:11,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 07:20:11,837 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2018-11-10 07:20:11,837 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-10 07:20:11,837 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2018-11-10 07:20:11,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-11-10 07:20:11,838 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:20:11,838 INFO L375 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 07:20:11,838 INFO L424 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 07:20:11,839 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:20:11,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1546214901, now seen corresponding path program 1 times [2018-11-10 07:20:11,839 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 07:20:11,839 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 07:20:11,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:20:11,840 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 07:20:11,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:20:11,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:20:11,906 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-10 07:20:11,906 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 07:20:11,906 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_28df22f5-a356-4cbb-8582-4243ffdffc1d/bin-2019/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 07:20:11,919 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 07:20:11,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:20:11,943 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 07:20:11,962 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-10 07:20:11,977 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 07:20:11,978 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-11-10 07:20:11,978 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-10 07:20:11,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-10 07:20:11,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-11-10 07:20:11,979 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand 5 states. [2018-11-10 07:20:12,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 07:20:12,036 INFO L93 Difference]: Finished difference Result 105 states and 120 transitions. [2018-11-10 07:20:12,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-10 07:20:12,036 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 41 [2018-11-10 07:20:12,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 07:20:12,037 INFO L225 Difference]: With dead ends: 105 [2018-11-10 07:20:12,037 INFO L226 Difference]: Without dead ends: 75 [2018-11-10 07:20:12,037 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-11-10 07:20:12,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-11-10 07:20:12,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 55. [2018-11-10 07:20:12,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-11-10 07:20:12,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 60 transitions. [2018-11-10 07:20:12,042 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 60 transitions. Word has length 41 [2018-11-10 07:20:12,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 07:20:12,042 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 60 transitions. [2018-11-10 07:20:12,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-10 07:20:12,042 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 60 transitions. [2018-11-10 07:20:12,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-11-10 07:20:12,043 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:20:12,043 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 07:20:12,043 INFO L424 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 07:20:12,043 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:20:12,044 INFO L82 PathProgramCache]: Analyzing trace with hash -687417832, now seen corresponding path program 2 times [2018-11-10 07:20:12,044 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 07:20:12,044 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 07:20:12,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:20:12,045 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 07:20:12,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:20:12,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:20:12,091 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-11-10 07:20:12,091 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 07:20:12,091 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_28df22f5-a356-4cbb-8582-4243ffdffc1d/bin-2019/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 07:20:12,106 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-10 07:20:12,127 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-10 07:20:12,127 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 07:20:12,129 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 07:20:12,138 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-11-10 07:20:12,165 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 07:20:12,165 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-11-10 07:20:12,166 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-10 07:20:12,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-10 07:20:12,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-11-10 07:20:12,166 INFO L87 Difference]: Start difference. First operand 55 states and 60 transitions. Second operand 6 states. [2018-11-10 07:20:12,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 07:20:12,229 INFO L93 Difference]: Finished difference Result 127 states and 144 transitions. [2018-11-10 07:20:12,229 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-10 07:20:12,229 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 51 [2018-11-10 07:20:12,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 07:20:12,230 INFO L225 Difference]: With dead ends: 127 [2018-11-10 07:20:12,230 INFO L226 Difference]: Without dead ends: 92 [2018-11-10 07:20:12,231 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-11-10 07:20:12,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-11-10 07:20:12,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 65. [2018-11-10 07:20:12,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-11-10 07:20:12,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 70 transitions. [2018-11-10 07:20:12,236 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 70 transitions. Word has length 51 [2018-11-10 07:20:12,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 07:20:12,236 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 70 transitions. [2018-11-10 07:20:12,236 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-10 07:20:12,236 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 70 transitions. [2018-11-10 07:20:12,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-11-10 07:20:12,237 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:20:12,237 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 07:20:12,238 INFO L424 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 07:20:12,238 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:20:12,238 INFO L82 PathProgramCache]: Analyzing trace with hash -561435307, now seen corresponding path program 3 times [2018-11-10 07:20:12,238 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 07:20:12,238 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 07:20:12,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:20:12,239 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 07:20:12,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:20:12,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:20:12,299 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-11-10 07:20:12,300 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 07:20:12,300 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_28df22f5-a356-4cbb-8582-4243ffdffc1d/bin-2019/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 07:20:12,305 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-10 07:20:12,355 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-11-10 07:20:12,356 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 07:20:12,358 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 07:20:12,378 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-11-10 07:20:12,396 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 07:20:12,396 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2018-11-10 07:20:12,396 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-10 07:20:12,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-10 07:20:12,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-11-10 07:20:12,397 INFO L87 Difference]: Start difference. First operand 65 states and 70 transitions. Second operand 7 states. [2018-11-10 07:20:12,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 07:20:12,463 INFO L93 Difference]: Finished difference Result 149 states and 168 transitions. [2018-11-10 07:20:12,464 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-10 07:20:12,464 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 61 [2018-11-10 07:20:12,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 07:20:12,465 INFO L225 Difference]: With dead ends: 149 [2018-11-10 07:20:12,465 INFO L226 Difference]: Without dead ends: 109 [2018-11-10 07:20:12,465 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-11-10 07:20:12,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-11-10 07:20:12,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 75. [2018-11-10 07:20:12,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-11-10 07:20:12,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 80 transitions. [2018-11-10 07:20:12,471 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 80 transitions. Word has length 61 [2018-11-10 07:20:12,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 07:20:12,472 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 80 transitions. [2018-11-10 07:20:12,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-10 07:20:12,472 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 80 transitions. [2018-11-10 07:20:12,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-11-10 07:20:12,473 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:20:12,473 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 07:20:12,473 INFO L424 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 07:20:12,473 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:20:12,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1338516920, now seen corresponding path program 4 times [2018-11-10 07:20:12,474 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 07:20:12,474 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 07:20:12,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:20:12,475 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 07:20:12,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:20:12,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:20:12,551 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2018-11-10 07:20:12,551 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 07:20:12,551 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_28df22f5-a356-4cbb-8582-4243ffdffc1d/bin-2019/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 07:20:12,564 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-10 07:20:12,580 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-10 07:20:12,580 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 07:20:12,583 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 07:20:12,599 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2018-11-10 07:20:12,614 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 07:20:12,614 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-11-10 07:20:12,615 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-10 07:20:12,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-10 07:20:12,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-11-10 07:20:12,616 INFO L87 Difference]: Start difference. First operand 75 states and 80 transitions. Second operand 8 states. [2018-11-10 07:20:12,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 07:20:12,708 INFO L93 Difference]: Finished difference Result 165 states and 186 transitions. [2018-11-10 07:20:12,708 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-10 07:20:12,708 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 71 [2018-11-10 07:20:12,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 07:20:12,709 INFO L225 Difference]: With dead ends: 165 [2018-11-10 07:20:12,709 INFO L226 Difference]: Without dead ends: 120 [2018-11-10 07:20:12,710 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-11-10 07:20:12,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2018-11-10 07:20:12,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 85. [2018-11-10 07:20:12,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-11-10 07:20:12,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 90 transitions. [2018-11-10 07:20:12,716 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 90 transitions. Word has length 71 [2018-11-10 07:20:12,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 07:20:12,716 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 90 transitions. [2018-11-10 07:20:12,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-10 07:20:12,716 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 90 transitions. [2018-11-10 07:20:12,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-11-10 07:20:12,717 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:20:12,717 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 07:20:12,717 INFO L424 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 07:20:12,718 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:20:12,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1460102325, now seen corresponding path program 5 times [2018-11-10 07:20:12,718 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 07:20:12,718 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 07:20:12,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:20:12,719 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 07:20:12,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:20:12,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 07:20:12,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 07:20:12,788 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-11-10 07:20:12,822 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.11 07:20:12 BoogieIcfgContainer [2018-11-10 07:20:12,822 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-10 07:20:12,823 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-10 07:20:12,823 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-10 07:20:12,823 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-10 07:20:12,823 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 07:20:11" (3/4) ... [2018-11-10 07:20:12,826 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-11-10 07:20:12,827 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-10 07:20:12,827 INFO L168 Benchmark]: Toolchain (without parser) took 1870.44 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 151.5 MB). Free memory was 959.2 MB in the beginning and 910.8 MB in the end (delta: 48.4 MB). Peak memory consumption was 199.9 MB. Max. memory is 11.5 GB. [2018-11-10 07:20:12,828 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 985.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 07:20:12,829 INFO L168 Benchmark]: CACSL2BoogieTranslator took 158.53 ms. Allocated memory is still 1.0 GB. Free memory was 959.2 MB in the beginning and 947.4 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 11.5 GB. [2018-11-10 07:20:12,829 INFO L168 Benchmark]: Boogie Preprocessor took 28.13 ms. Allocated memory is still 1.0 GB. Free memory was 947.4 MB in the beginning and 944.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-10 07:20:12,830 INFO L168 Benchmark]: RCFGBuilder took 292.29 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 151.5 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -180.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 11.5 GB. [2018-11-10 07:20:12,830 INFO L168 Benchmark]: TraceAbstraction took 1384.20 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 910.8 MB in the end (delta: 214.2 MB). Peak memory consumption was 214.2 MB. Max. memory is 11.5 GB. [2018-11-10 07:20:12,831 INFO L168 Benchmark]: Witness Printer took 4.18 ms. Allocated memory is still 1.2 GB. Free memory is still 910.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 07:20:12,833 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 985.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 158.53 ms. Allocated memory is still 1.0 GB. Free memory was 959.2 MB in the beginning and 947.4 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 28.13 ms. Allocated memory is still 1.0 GB. Free memory was 947.4 MB in the beginning and 944.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 292.29 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 151.5 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -180.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1384.20 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 910.8 MB in the end (delta: 214.2 MB). Peak memory consumption was 214.2 MB. Max. memory is 11.5 GB. * Witness Printer took 4.18 ms. Allocated memory is still 1.2 GB. Free memory is still 910.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 6]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of shiftLeft at line 55. Possible FailurePath: [L17] FCALL char string_A[5], string_B[5]; VAL [string_A={8:0}, string_B={9:0}] [L18] int i, j, nc_A, nc_B, found=0; [L21] i=0 VAL [found=0, i=0, string_A={8:0}, string_B={9:0}] [L21] COND TRUE i<5 [L22] FCALL string_A[i]=__VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=0, found=0, i=0, string_A={8:0}, string_B={9:0}] [L21] i++ VAL [found=0, i=1, string_A={8:0}, string_B={9:0}] [L21] COND TRUE i<5 [L22] FCALL string_A[i]=__VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=0, found=0, i=1, string_A={8:0}, string_B={9:0}] [L21] i++ VAL [found=0, i=2, string_A={8:0}, string_B={9:0}] [L21] COND TRUE i<5 [L22] FCALL string_A[i]=__VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=0, found=0, i=2, string_A={8:0}, string_B={9:0}] [L21] i++ VAL [found=0, i=3, string_A={8:0}, string_B={9:0}] [L21] COND TRUE i<5 [L22] FCALL string_A[i]=__VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=0, found=0, i=3, string_A={8:0}, string_B={9:0}] [L21] i++ VAL [found=0, i=4, string_A={8:0}, string_B={9:0}] [L21] COND TRUE i<5 [L22] FCALL string_A[i]=__VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=0, found=0, i=4, string_A={8:0}, string_B={9:0}] [L21] i++ VAL [found=0, i=5, string_A={8:0}, string_B={9:0}] [L21] COND FALSE !(i<5) VAL [found=0, i=5, string_A={8:0}, string_B={9:0}] [L23] EXPR, FCALL string_A[5 -1] VAL [found=0, i=5, string_A={8:0}, string_A[5 -1]=0, string_B={9:0}] [L23] COND FALSE !(!(string_A[5 -1]=='\0')) [L25] i=0 VAL [found=0, i=0, string_A={8:0}, string_B={9:0}] [L25] COND TRUE i<5 [L26] FCALL string_B[i]=__VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=0, found=0, i=0, string_A={8:0}, string_B={9:0}] [L25] i++ VAL [found=0, i=1, string_A={8:0}, string_B={9:0}] [L25] COND TRUE i<5 [L26] FCALL string_B[i]=__VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=0, found=0, i=1, string_A={8:0}, string_B={9:0}] [L25] i++ VAL [found=0, i=2, string_A={8:0}, string_B={9:0}] [L25] COND TRUE i<5 [L26] FCALL string_B[i]=__VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=0, found=0, i=2, string_A={8:0}, string_B={9:0}] [L25] i++ VAL [found=0, i=3, string_A={8:0}, string_B={9:0}] [L25] COND TRUE i<5 [L26] FCALL string_B[i]=__VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=0, found=0, i=3, string_A={8:0}, string_B={9:0}] [L25] i++ VAL [found=0, i=4, string_A={8:0}, string_B={9:0}] [L25] COND TRUE i<5 [L26] FCALL string_B[i]=__VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=0, found=0, i=4, string_A={8:0}, string_B={9:0}] [L25] i++ VAL [found=0, i=5, string_A={8:0}, string_B={9:0}] [L25] COND FALSE !(i<5) VAL [found=0, i=5, string_A={8:0}, string_B={9:0}] [L27] EXPR, FCALL string_B[5 -1] VAL [found=0, i=5, string_A={8:0}, string_B={9:0}, string_B[5 -1]=0] [L27] COND FALSE !(!(string_B[5 -1]=='\0')) [L29] nc_A = 0 VAL [found=0, i=5, nc_A=0, string_A={8:0}, string_B={9:0}] [L30] EXPR, FCALL string_A[nc_A] VAL [found=0, i=5, nc_A=0, string_A={8:0}, string_A[nc_A]=0, string_B={9:0}] [L30] COND FALSE !(string_A[nc_A]!='\0') [L33] nc_B = 0 VAL [found=0, i=5, nc_A=0, nc_B=0, string_A={8:0}, string_B={9:0}] [L34] EXPR, FCALL string_B[nc_B] VAL [found=0, i=5, nc_A=0, nc_B=0, string_A={8:0}, string_B={9:0}, string_B[nc_B]=0] [L34] COND FALSE !(string_B[nc_B]!='\0') [L37] COND FALSE !(!(nc_B >= nc_A)) [L40] EXPR j=0 [L40] i=j=0 VAL [found=0, i=0, j=0, nc_A=0, nc_B=0, string_A={8:0}, string_B={9:0}] [L41] COND FALSE !((inc_B-1)< main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/working_dir_28df22f5-a356-4cbb-8582-4243ffdffc1d/bin-2019/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 77cd31699320cd40da64f32a92959020d19291bd [2018-11-10 07:20:14,318 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-10 07:20:14,326 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-10 07:20:14,328 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-10 07:20:14,329 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-10 07:20:14,329 INFO L276 PluginConnector]: CDTParser initialized [2018-11-10 07:20:14,330 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_28df22f5-a356-4cbb-8582-4243ffdffc1d/bin-2019/uautomizer/../../sv-benchmarks/c/loops/string_false-unreach-call_true-termination.i [2018-11-10 07:20:14,365 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_28df22f5-a356-4cbb-8582-4243ffdffc1d/bin-2019/uautomizer/data/746ef207a/1fd51119dfc84558894764e2f67b7c5d/FLAGbce0e80d5 [2018-11-10 07:20:14,682 INFO L298 CDTParser]: Found 1 translation units. [2018-11-10 07:20:14,682 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_28df22f5-a356-4cbb-8582-4243ffdffc1d/sv-benchmarks/c/loops/string_false-unreach-call_true-termination.i [2018-11-10 07:20:14,686 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_28df22f5-a356-4cbb-8582-4243ffdffc1d/bin-2019/uautomizer/data/746ef207a/1fd51119dfc84558894764e2f67b7c5d/FLAGbce0e80d5 [2018-11-10 07:20:14,694 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_28df22f5-a356-4cbb-8582-4243ffdffc1d/bin-2019/uautomizer/data/746ef207a/1fd51119dfc84558894764e2f67b7c5d [2018-11-10 07:20:14,695 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-10 07:20:14,696 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-10 07:20:14,697 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-10 07:20:14,697 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-10 07:20:14,700 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-10 07:20:14,701 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 07:20:14" (1/1) ... [2018-11-10 07:20:14,703 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@98713a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 07:20:14, skipping insertion in model container [2018-11-10 07:20:14,703 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 07:20:14" (1/1) ... [2018-11-10 07:20:14,711 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-10 07:20:14,723 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-10 07:20:14,839 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 07:20:14,842 INFO L189 MainTranslator]: Completed pre-run [2018-11-10 07:20:14,861 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 07:20:14,875 INFO L193 MainTranslator]: Completed translation [2018-11-10 07:20:14,875 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 07:20:14 WrapperNode [2018-11-10 07:20:14,875 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-10 07:20:14,876 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-10 07:20:14,876 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-10 07:20:14,876 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-10 07:20:14,884 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 07:20:14" (1/1) ... [2018-11-10 07:20:14,884 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 07:20:14" (1/1) ... [2018-11-10 07:20:14,891 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 07:20:14" (1/1) ... [2018-11-10 07:20:14,891 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 07:20:14" (1/1) ... [2018-11-10 07:20:14,898 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 07:20:14" (1/1) ... [2018-11-10 07:20:14,903 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 07:20:14" (1/1) ... [2018-11-10 07:20:14,904 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 07:20:14" (1/1) ... [2018-11-10 07:20:14,906 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-10 07:20:14,907 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-10 07:20:14,907 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-10 07:20:14,907 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-10 07:20:14,908 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 07:20:14" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_28df22f5-a356-4cbb-8582-4243ffdffc1d/bin-2019/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-10 07:20:14,989 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-10 07:20:14,989 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-10 07:20:14,989 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-11-10 07:20:14,989 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-10 07:20:14,990 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-11-10 07:20:14,990 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2018-11-10 07:20:14,990 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-11-10 07:20:14,990 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2018-11-10 07:20:14,990 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-10 07:20:14,990 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-11-10 07:20:14,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2018-11-10 07:20:14,990 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2018-11-10 07:20:14,990 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-11-10 07:20:14,991 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-10 07:20:14,991 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-10 07:20:14,991 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2018-11-10 07:20:15,200 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-10 07:20:15,200 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 07:20:15 BoogieIcfgContainer [2018-11-10 07:20:15,200 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-10 07:20:15,201 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-10 07:20:15,201 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-10 07:20:15,203 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-10 07:20:15,203 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 07:20:14" (1/3) ... [2018-11-10 07:20:15,204 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30da39e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 07:20:15, skipping insertion in model container [2018-11-10 07:20:15,204 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 07:20:14" (2/3) ... [2018-11-10 07:20:15,204 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30da39e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 07:20:15, skipping insertion in model container [2018-11-10 07:20:15,204 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 07:20:15" (3/3) ... [2018-11-10 07:20:15,206 INFO L112 eAbstractionObserver]: Analyzing ICFG string_false-unreach-call_true-termination.i [2018-11-10 07:20:15,211 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-10 07:20:15,216 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-10 07:20:15,225 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-10 07:20:15,244 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-11-10 07:20:15,245 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-10 07:20:15,245 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-10 07:20:15,245 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-10 07:20:15,246 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-10 07:20:15,246 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-10 07:20:15,246 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-10 07:20:15,246 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-10 07:20:15,246 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-10 07:20:15,259 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states. [2018-11-10 07:20:15,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-11-10 07:20:15,263 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:20:15,263 INFO L375 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, 1] [2018-11-10 07:20:15,264 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 07:20:15,268 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:20:15,268 INFO L82 PathProgramCache]: Analyzing trace with hash 308783607, now seen corresponding path program 1 times [2018-11-10 07:20:15,270 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 07:20:15,271 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_28df22f5-a356-4cbb-8582-4243ffdffc1d/bin-2019/uautomizer/cvc4nyu Starting monitored process 2 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 07:20:15,283 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 07:20:15,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:20:15,324 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 07:20:15,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 07:20:15,336 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 07:20:15,338 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 07:20:15,338 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-10 07:20:15,340 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-10 07:20:15,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-10 07:20:15,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-10 07:20:15,350 INFO L87 Difference]: Start difference. First operand 64 states. Second operand 2 states. [2018-11-10 07:20:15,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 07:20:15,371 INFO L93 Difference]: Finished difference Result 115 states and 142 transitions. [2018-11-10 07:20:15,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-10 07:20:15,372 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 24 [2018-11-10 07:20:15,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 07:20:15,377 INFO L225 Difference]: With dead ends: 115 [2018-11-10 07:20:15,377 INFO L226 Difference]: Without dead ends: 41 [2018-11-10 07:20:15,380 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-10 07:20:15,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-11-10 07:20:15,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-11-10 07:20:15,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-11-10 07:20:15,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2018-11-10 07:20:15,404 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 24 [2018-11-10 07:20:15,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 07:20:15,405 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2018-11-10 07:20:15,405 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-10 07:20:15,405 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2018-11-10 07:20:15,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-11-10 07:20:15,406 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:20:15,406 INFO L375 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, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 07:20:15,406 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 07:20:15,406 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:20:15,407 INFO L82 PathProgramCache]: Analyzing trace with hash -598303112, now seen corresponding path program 1 times [2018-11-10 07:20:15,407 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 07:20:15,407 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_28df22f5-a356-4cbb-8582-4243ffdffc1d/bin-2019/uautomizer/cvc4nyu Starting monitored process 3 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 07:20:15,432 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 07:20:15,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:20:15,478 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 07:20:15,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 07:20:15,491 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 07:20:15,496 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 07:20:15,496 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-10 07:20:15,497 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-10 07:20:15,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-10 07:20:15,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-10 07:20:15,498 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand 3 states. [2018-11-10 07:20:15,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 07:20:15,564 INFO L93 Difference]: Finished difference Result 86 states and 99 transitions. [2018-11-10 07:20:15,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-10 07:20:15,565 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2018-11-10 07:20:15,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 07:20:15,567 INFO L225 Difference]: With dead ends: 86 [2018-11-10 07:20:15,567 INFO L226 Difference]: Without dead ends: 58 [2018-11-10 07:20:15,568 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-10 07:20:15,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-11-10 07:20:15,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 45. [2018-11-10 07:20:15,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-11-10 07:20:15,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2018-11-10 07:20:15,573 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 31 [2018-11-10 07:20:15,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 07:20:15,573 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2018-11-10 07:20:15,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-10 07:20:15,573 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2018-11-10 07:20:15,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-11-10 07:20:15,574 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:20:15,574 INFO L375 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 07:20:15,575 INFO L424 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 07:20:15,575 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:20:15,575 INFO L82 PathProgramCache]: Analyzing trace with hash 1546214901, now seen corresponding path program 1 times [2018-11-10 07:20:15,575 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 07:20:15,576 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_28df22f5-a356-4cbb-8582-4243ffdffc1d/bin-2019/uautomizer/cvc4nyu Starting monitored process 4 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 07:20:15,601 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 07:20:15,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:20:15,639 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 07:20:15,654 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-10 07:20:15,655 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 07:20:15,702 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-10 07:20:15,703 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 07:20:15,703 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2018-11-10 07:20:15,704 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-10 07:20:15,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-10 07:20:15,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-11-10 07:20:15,704 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand 6 states. [2018-11-10 07:20:15,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 07:20:15,881 INFO L93 Difference]: Finished difference Result 133 states and 156 transitions. [2018-11-10 07:20:15,882 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-10 07:20:15,882 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 41 [2018-11-10 07:20:15,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 07:20:15,883 INFO L225 Difference]: With dead ends: 133 [2018-11-10 07:20:15,883 INFO L226 Difference]: Without dead ends: 103 [2018-11-10 07:20:15,883 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2018-11-10 07:20:15,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-11-10 07:20:15,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 75. [2018-11-10 07:20:15,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-11-10 07:20:15,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 80 transitions. [2018-11-10 07:20:15,889 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 80 transitions. Word has length 41 [2018-11-10 07:20:15,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 07:20:15,889 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 80 transitions. [2018-11-10 07:20:15,889 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-10 07:20:15,889 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 80 transitions. [2018-11-10 07:20:15,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-11-10 07:20:15,890 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:20:15,890 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 07:20:15,890 INFO L424 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 07:20:15,890 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:20:15,891 INFO L82 PathProgramCache]: Analyzing trace with hash 1338516920, now seen corresponding path program 2 times [2018-11-10 07:20:15,891 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 07:20:15,891 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_28df22f5-a356-4cbb-8582-4243ffdffc1d/bin-2019/uautomizer/cvc4nyu Starting monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 07:20:15,904 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2018-11-10 07:20:15,934 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2018-11-10 07:20:15,934 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 07:20:15,939 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 07:20:15,973 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2018-11-10 07:20:15,973 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 07:20:15,974 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 07:20:15,974 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-11-10 07:20:15,974 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-10 07:20:15,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-10 07:20:15,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2018-11-10 07:20:15,975 INFO L87 Difference]: Start difference. First operand 75 states and 80 transitions. Second operand 7 states. [2018-11-10 07:20:16,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 07:20:16,083 INFO L93 Difference]: Finished difference Result 96 states and 104 transitions. [2018-11-10 07:20:16,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-10 07:20:16,084 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 71 [2018-11-10 07:20:16,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 07:20:16,085 INFO L225 Difference]: With dead ends: 96 [2018-11-10 07:20:16,085 INFO L226 Difference]: Without dead ends: 78 [2018-11-10 07:20:16,086 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2018-11-10 07:20:16,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-11-10 07:20:16,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-11-10 07:20:16,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-11-10 07:20:16,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 83 transitions. [2018-11-10 07:20:16,094 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 83 transitions. Word has length 71 [2018-11-10 07:20:16,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 07:20:16,094 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 83 transitions. [2018-11-10 07:20:16,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-10 07:20:16,094 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 83 transitions. [2018-11-10 07:20:16,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-11-10 07:20:16,096 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:20:16,096 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 07:20:16,097 INFO L424 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 07:20:16,097 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:20:16,097 INFO L82 PathProgramCache]: Analyzing trace with hash 402234175, now seen corresponding path program 1 times [2018-11-10 07:20:16,097 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 07:20:16,097 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_28df22f5-a356-4cbb-8582-4243ffdffc1d/bin-2019/uautomizer/cvc4nyu Starting monitored process 6 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 07:20:16,122 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 07:20:16,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:20:16,174 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 07:20:16,209 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2018-11-10 07:20:16,209 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 07:20:16,281 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2018-11-10 07:20:16,282 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 07:20:16,283 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2018-11-10 07:20:16,283 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-10 07:20:16,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-10 07:20:16,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2018-11-10 07:20:16,283 INFO L87 Difference]: Start difference. First operand 78 states and 83 transitions. Second operand 12 states. [2018-11-10 07:20:16,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 07:20:16,644 INFO L93 Difference]: Finished difference Result 177 states and 198 transitions. [2018-11-10 07:20:16,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-10 07:20:16,645 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 74 [2018-11-10 07:20:16,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 07:20:16,646 INFO L225 Difference]: With dead ends: 177 [2018-11-10 07:20:16,646 INFO L226 Difference]: Without dead ends: 129 [2018-11-10 07:20:16,646 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2018-11-10 07:20:16,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-11-10 07:20:16,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 88. [2018-11-10 07:20:16,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-11-10 07:20:16,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 93 transitions. [2018-11-10 07:20:16,655 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 93 transitions. Word has length 74 [2018-11-10 07:20:16,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 07:20:16,655 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 93 transitions. [2018-11-10 07:20:16,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-10 07:20:16,656 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 93 transitions. [2018-11-10 07:20:16,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-11-10 07:20:16,657 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:20:16,657 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 07:20:16,657 INFO L424 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 07:20:16,657 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:20:16,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1895604002, now seen corresponding path program 2 times [2018-11-10 07:20:16,658 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 07:20:16,658 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_28df22f5-a356-4cbb-8582-4243ffdffc1d/bin-2019/uautomizer/cvc4nyu Starting monitored process 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 07:20:16,669 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2018-11-10 07:20:16,699 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2018-11-10 07:20:16,699 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 07:20:16,704 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 07:20:16,760 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2018-11-10 07:20:16,761 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 07:20:16,762 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 07:20:16,762 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-10 07:20:16,762 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-10 07:20:16,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-10 07:20:16,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-11-10 07:20:16,763 INFO L87 Difference]: Start difference. First operand 88 states and 93 transitions. Second operand 6 states. [2018-11-10 07:20:16,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 07:20:16,855 INFO L93 Difference]: Finished difference Result 99 states and 105 transitions. [2018-11-10 07:20:16,855 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-10 07:20:16,855 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 84 [2018-11-10 07:20:16,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 07:20:16,856 INFO L225 Difference]: With dead ends: 99 [2018-11-10 07:20:16,856 INFO L226 Difference]: Without dead ends: 93 [2018-11-10 07:20:16,856 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-11-10 07:20:16,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-11-10 07:20:16,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 90. [2018-11-10 07:20:16,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-11-10 07:20:16,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 95 transitions. [2018-11-10 07:20:16,862 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 95 transitions. Word has length 84 [2018-11-10 07:20:16,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 07:20:16,862 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 95 transitions. [2018-11-10 07:20:16,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-10 07:20:16,863 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 95 transitions. [2018-11-10 07:20:16,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-11-10 07:20:16,864 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:20:16,864 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 07:20:16,864 INFO L424 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 07:20:16,864 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:20:16,864 INFO L82 PathProgramCache]: Analyzing trace with hash -1423095970, now seen corresponding path program 1 times [2018-11-10 07:20:16,865 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 07:20:16,865 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_28df22f5-a356-4cbb-8582-4243ffdffc1d/bin-2019/uautomizer/cvc4nyu Starting monitored process 8 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 07:20:16,882 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 07:20:16,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:20:16,944 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 07:20:16,967 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2018-11-10 07:20:16,967 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 07:20:16,969 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 07:20:16,969 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-10 07:20:16,969 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-10 07:20:16,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-10 07:20:16,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-10 07:20:16,970 INFO L87 Difference]: Start difference. First operand 90 states and 95 transitions. Second operand 4 states. [2018-11-10 07:20:16,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 07:20:16,986 INFO L93 Difference]: Finished difference Result 114 states and 122 transitions. [2018-11-10 07:20:16,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-10 07:20:16,986 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 89 [2018-11-10 07:20:16,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 07:20:16,987 INFO L225 Difference]: With dead ends: 114 [2018-11-10 07:20:16,987 INFO L226 Difference]: Without dead ends: 93 [2018-11-10 07:20:16,988 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-10 07:20:16,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-11-10 07:20:16,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-11-10 07:20:16,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-11-10 07:20:16,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 98 transitions. [2018-11-10 07:20:16,996 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 98 transitions. Word has length 89 [2018-11-10 07:20:16,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 07:20:16,996 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 98 transitions. [2018-11-10 07:20:16,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-10 07:20:16,997 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 98 transitions. [2018-11-10 07:20:16,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-11-10 07:20:16,998 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:20:16,998 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 07:20:16,998 INFO L424 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 07:20:16,998 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:20:16,998 INFO L82 PathProgramCache]: Analyzing trace with hash 174267018, now seen corresponding path program 1 times [2018-11-10 07:20:16,999 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 07:20:16,999 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_28df22f5-a356-4cbb-8582-4243ffdffc1d/bin-2019/uautomizer/cvc4nyu Starting monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 07:20:17,029 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 07:20:17,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 07:20:17,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 07:20:17,387 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-11-10 07:20:17,426 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.11 07:20:17 BoogieIcfgContainer [2018-11-10 07:20:17,426 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-10 07:20:17,426 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-10 07:20:17,426 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-10 07:20:17,427 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-10 07:20:17,427 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 07:20:15" (3/4) ... [2018-11-10 07:20:17,428 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-11-10 07:20:17,480 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_28df22f5-a356-4cbb-8582-4243ffdffc1d/bin-2019/uautomizer/witness.graphml [2018-11-10 07:20:17,480 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-10 07:20:17,481 INFO L168 Benchmark]: Toolchain (without parser) took 2784.81 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 150.5 MB). Free memory was 950.8 MB in the beginning and 814.9 MB in the end (delta: 135.9 MB). Peak memory consumption was 286.4 MB. Max. memory is 11.5 GB. [2018-11-10 07:20:17,481 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 07:20:17,482 INFO L168 Benchmark]: CACSL2BoogieTranslator took 178.58 ms. Allocated memory is still 1.0 GB. Free memory was 950.8 MB in the beginning and 934.7 MB in the end (delta: 16.1 MB). Peak memory consumption was 16.1 MB. Max. memory is 11.5 GB. [2018-11-10 07:20:17,482 INFO L168 Benchmark]: Boogie Preprocessor took 31.00 ms. Allocated memory is still 1.0 GB. Free memory is still 934.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 07:20:17,482 INFO L168 Benchmark]: RCFGBuilder took 293.24 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 150.5 MB). Free memory was 934.7 MB in the beginning and 1.1 GB in the end (delta: -187.4 MB). Peak memory consumption was 20.8 MB. Max. memory is 11.5 GB. [2018-11-10 07:20:17,482 INFO L168 Benchmark]: TraceAbstraction took 2225.42 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 820.8 MB in the end (delta: 301.3 MB). Peak memory consumption was 301.3 MB. Max. memory is 11.5 GB. [2018-11-10 07:20:17,483 INFO L168 Benchmark]: Witness Printer took 53.68 ms. Allocated memory is still 1.2 GB. Free memory was 820.8 MB in the beginning and 814.9 MB in the end (delta: 5.9 MB). Peak memory consumption was 5.9 MB. Max. memory is 11.5 GB. [2018-11-10 07:20:17,485 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 178.58 ms. Allocated memory is still 1.0 GB. Free memory was 950.8 MB in the beginning and 934.7 MB in the end (delta: 16.1 MB). Peak memory consumption was 16.1 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 31.00 ms. Allocated memory is still 1.0 GB. Free memory is still 934.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 293.24 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 150.5 MB). Free memory was 934.7 MB in the beginning and 1.1 GB in the end (delta: -187.4 MB). Peak memory consumption was 20.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 2225.42 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 820.8 MB in the end (delta: 301.3 MB). Peak memory consumption was 301.3 MB. Max. memory is 11.5 GB. * Witness Printer took 53.68 ms. Allocated memory is still 1.2 GB. Free memory was 820.8 MB in the beginning and 814.9 MB in the end (delta: 5.9 MB). Peak memory consumption was 5.9 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 6]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L17] FCALL char string_A[5], string_B[5]; VAL [string_A={2:0}, string_B={3:0}] [L18] int i, j, nc_A, nc_B, found=0; [L21] i=0 VAL [found=0, i=0, string_A={2:0}, string_B={3:0}] [L21] COND TRUE i<5 VAL [found=0, i=0, string_A={2:0}, string_B={3:0}] [L22] FCALL string_A[i]=__VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=1, found=0, i=0, string_A={2:0}, string_B={3:0}] [L21] i++ VAL [found=0, i=1, string_A={2:0}, string_B={3:0}] [L21] COND TRUE i<5 VAL [found=0, i=1, string_A={2:0}, string_B={3:0}] [L22] FCALL string_A[i]=__VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=0, found=0, i=1, string_A={2:0}, string_B={3:0}] [L21] i++ VAL [found=0, i=2, string_A={2:0}, string_B={3:0}] [L21] COND TRUE i<5 VAL [found=0, i=2, string_A={2:0}, string_B={3:0}] [L22] FCALL string_A[i]=__VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=0, found=0, i=2, string_A={2:0}, string_B={3:0}] [L21] i++ VAL [found=0, i=3, string_A={2:0}, string_B={3:0}] [L21] COND TRUE i<5 VAL [found=0, i=3, string_A={2:0}, string_B={3:0}] [L22] FCALL string_A[i]=__VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=0, found=0, i=3, string_A={2:0}, string_B={3:0}] [L21] i++ VAL [found=0, i=4, string_A={2:0}, string_B={3:0}] [L21] COND TRUE i<5 VAL [found=0, i=4, string_A={2:0}, string_B={3:0}] [L22] FCALL string_A[i]=__VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=0, found=0, i=4, string_A={2:0}, string_B={3:0}] [L21] i++ VAL [found=0, i=5, string_A={2:0}, string_B={3:0}] [L21] COND FALSE !(i<5) VAL [found=0, i=5, string_A={2:0}, string_B={3:0}] [L23] EXPR, FCALL string_A[5 -1] VAL [found=0, i=5, string_A={2:0}, string_A[5 -1]=0, string_B={3:0}] [L23] COND FALSE !(!(string_A[5 -1]=='\0')) [L25] i=0 VAL [found=0, i=0, string_A={2:0}, string_B={3:0}] [L25] COND TRUE i<5 VAL [found=0, i=0, string_A={2:0}, string_B={3:0}] [L26] FCALL string_B[i]=__VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=1, found=0, i=0, string_A={2:0}, string_B={3:0}] [L25] i++ VAL [found=0, i=1, string_A={2:0}, string_B={3:0}] [L25] COND TRUE i<5 VAL [found=0, i=1, string_A={2:0}, string_B={3:0}] [L26] FCALL string_B[i]=__VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=0, found=0, i=1, string_A={2:0}, string_B={3:0}] [L25] i++ VAL [found=0, i=2, string_A={2:0}, string_B={3:0}] [L25] COND TRUE i<5 VAL [found=0, i=2, string_A={2:0}, string_B={3:0}] [L26] FCALL string_B[i]=__VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=0, found=0, i=2, string_A={2:0}, string_B={3:0}] [L25] i++ VAL [found=0, i=3, string_A={2:0}, string_B={3:0}] [L25] COND TRUE i<5 VAL [found=0, i=3, string_A={2:0}, string_B={3:0}] [L26] FCALL string_B[i]=__VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=0, found=0, i=3, string_A={2:0}, string_B={3:0}] [L25] i++ VAL [found=0, i=4, string_A={2:0}, string_B={3:0}] [L25] COND TRUE i<5 VAL [found=0, i=4, string_A={2:0}, string_B={3:0}] [L26] FCALL string_B[i]=__VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=0, found=0, i=4, string_A={2:0}, string_B={3:0}] [L25] i++ VAL [found=0, i=5, string_A={2:0}, string_B={3:0}] [L25] COND FALSE !(i<5) VAL [found=0, i=5, string_A={2:0}, string_B={3:0}] [L27] EXPR, FCALL string_B[5 -1] VAL [found=0, i=5, string_A={2:0}, string_B={3:0}, string_B[5 -1]=0] [L27] COND FALSE !(!(string_B[5 -1]=='\0')) [L29] nc_A = 0 VAL [found=0, i=5, nc_A=0, string_A={2:0}, string_B={3:0}] [L30] EXPR, FCALL string_A[nc_A] VAL [found=0, i=5, nc_A=0, string_A={2:0}, string_A[nc_A]=1, string_B={3:0}] [L30] COND TRUE string_A[nc_A]!='\0' [L31] nc_A++ VAL [found=0, i=5, nc_A=1, string_A={2:0}, string_B={3:0}] [L30] EXPR, FCALL string_A[nc_A] VAL [found=0, i=5, nc_A=1, string_A={2:0}, string_A[nc_A]=0, string_B={3:0}] [L30] COND FALSE !(string_A[nc_A]!='\0') [L33] nc_B = 0 VAL [found=0, i=5, nc_A=1, nc_B=0, string_A={2:0}, string_B={3:0}] [L34] EXPR, FCALL string_B[nc_B] VAL [found=0, i=5, nc_A=1, nc_B=0, string_A={2:0}, string_B={3:0}, string_B[nc_B]=1] [L34] COND TRUE string_B[nc_B]!='\0' [L35] nc_B++ VAL [found=0, i=5, nc_A=1, nc_B=1, string_A={2:0}, string_B={3:0}] [L34] EXPR, FCALL string_B[nc_B] VAL [found=0, i=5, nc_A=1, nc_B=1, string_A={2:0}, string_B={3:0}, string_B[nc_B]=0] [L34] COND FALSE !(string_B[nc_B]!='\0') [L37] COND FALSE !(!(nc_B >= nc_A)) [L40] EXPR j=0 [L40] i=j=0 VAL [found=0, i=0, j=0, nc_A=1, nc_B=1, string_A={2:0}, string_B={3:0}] [L41] COND TRUE (inc_B-1)<