./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/triangular_true-unreach-call.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0cd3be1d Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_f162daff-b454-4ee7-a95e-d7f21d108cd6/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_f162daff-b454-4ee7-a95e-d7f21d108cd6/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_f162daff-b454-4ee7-a95e-d7f21d108cd6/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_f162daff-b454-4ee7-a95e-d7f21d108cd6/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/triangular_true-unreach-call.i -s /tmp/vcloud-vcloud-master/worker/working_dir_f162daff-b454-4ee7-a95e-d7f21d108cd6/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_f162daff-b454-4ee7-a95e-d7f21d108cd6/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 58249a19aaa2ca34edeb532954b326c7f760e66f .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-0cd3be1 [2018-11-28 13:33:00,707 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-28 13:33:00,708 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-28 13:33:00,717 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-28 13:33:00,717 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-28 13:33:00,718 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-28 13:33:00,719 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-28 13:33:00,720 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-28 13:33:00,721 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-28 13:33:00,721 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-28 13:33:00,722 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-28 13:33:00,722 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-28 13:33:00,723 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-28 13:33:00,723 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-28 13:33:00,724 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-28 13:33:00,725 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-28 13:33:00,725 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-28 13:33:00,726 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-28 13:33:00,728 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-28 13:33:00,729 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-28 13:33:00,730 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-28 13:33:00,730 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-28 13:33:00,732 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-28 13:33:00,732 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-28 13:33:00,732 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-28 13:33:00,733 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-28 13:33:00,734 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-28 13:33:00,734 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-28 13:33:00,735 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-28 13:33:00,736 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-28 13:33:00,736 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-28 13:33:00,736 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-28 13:33:00,736 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-28 13:33:00,737 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-28 13:33:00,737 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-28 13:33:00,738 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-28 13:33:00,738 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_f162daff-b454-4ee7-a95e-d7f21d108cd6/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-11-28 13:33:00,747 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-28 13:33:00,747 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-28 13:33:00,748 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-28 13:33:00,748 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-11-28 13:33:00,748 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-28 13:33:00,749 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-28 13:33:00,749 INFO L133 SettingsManager]: * Use SBE=true [2018-11-28 13:33:00,749 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-28 13:33:00,749 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-28 13:33:00,749 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-28 13:33:00,749 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-28 13:33:00,749 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-28 13:33:00,750 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-28 13:33:00,750 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-28 13:33:00,750 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-28 13:33:00,750 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-28 13:33:00,750 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-28 13:33:00,750 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-28 13:33:00,750 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-28 13:33:00,751 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-28 13:33:00,751 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-28 13:33:00,751 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-28 13:33:00,751 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-28 13:33:00,751 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-28 13:33:00,751 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-28 13:33:00,752 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-28 13:33:00,752 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-28 13:33:00,752 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-28 13:33:00,752 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-28 13:33:00,752 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-28 13:33:00,752 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_f162daff-b454-4ee7-a95e-d7f21d108cd6/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 -> 58249a19aaa2ca34edeb532954b326c7f760e66f [2018-11-28 13:33:00,777 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-28 13:33:00,785 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-28 13:33:00,788 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-28 13:33:00,789 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-28 13:33:00,789 INFO L276 PluginConnector]: CDTParser initialized [2018-11-28 13:33:00,790 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_f162daff-b454-4ee7-a95e-d7f21d108cd6/bin-2019/uautomizer/../../sv-benchmarks/c/pthread/triangular_true-unreach-call.i [2018-11-28 13:33:00,834 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_f162daff-b454-4ee7-a95e-d7f21d108cd6/bin-2019/uautomizer/data/33720147a/bd6ca458c30b4b618db04202118e5173/FLAG0d52955af [2018-11-28 13:33:01,203 INFO L307 CDTParser]: Found 1 translation units. [2018-11-28 13:33:01,204 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_f162daff-b454-4ee7-a95e-d7f21d108cd6/sv-benchmarks/c/pthread/triangular_true-unreach-call.i [2018-11-28 13:33:01,214 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_f162daff-b454-4ee7-a95e-d7f21d108cd6/bin-2019/uautomizer/data/33720147a/bd6ca458c30b4b618db04202118e5173/FLAG0d52955af [2018-11-28 13:33:01,594 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_f162daff-b454-4ee7-a95e-d7f21d108cd6/bin-2019/uautomizer/data/33720147a/bd6ca458c30b4b618db04202118e5173 [2018-11-28 13:33:01,596 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-28 13:33:01,597 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-28 13:33:01,598 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-28 13:33:01,598 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-28 13:33:01,600 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-28 13:33:01,600 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 01:33:01" (1/1) ... [2018-11-28 13:33:01,602 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4fe3f5ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:33:01, skipping insertion in model container [2018-11-28 13:33:01,603 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 01:33:01" (1/1) ... [2018-11-28 13:33:01,607 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-28 13:33:01,632 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-28 13:33:01,836 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 13:33:01,844 INFO L191 MainTranslator]: Completed pre-run [2018-11-28 13:33:01,922 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 13:33:01,952 INFO L195 MainTranslator]: Completed translation [2018-11-28 13:33:01,952 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:33:01 WrapperNode [2018-11-28 13:33:01,953 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-28 13:33:01,953 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-28 13:33:01,953 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-28 13:33:01,953 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-28 13:33:01,958 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:33:01" (1/1) ... [2018-11-28 13:33:01,968 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:33:01" (1/1) ... [2018-11-28 13:33:01,982 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-28 13:33:01,982 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-28 13:33:01,982 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-28 13:33:01,982 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-28 13:33:01,987 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:33:01" (1/1) ... [2018-11-28 13:33:01,988 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:33:01" (1/1) ... [2018-11-28 13:33:01,989 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:33:01" (1/1) ... [2018-11-28 13:33:01,989 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:33:01" (1/1) ... [2018-11-28 13:33:01,992 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:33:01" (1/1) ... [2018-11-28 13:33:01,994 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:33:01" (1/1) ... [2018-11-28 13:33:01,995 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:33:01" (1/1) ... [2018-11-28 13:33:01,997 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-28 13:33:01,997 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-28 13:33:01,997 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-28 13:33:01,997 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-28 13:33:01,998 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:33:01" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f162daff-b454-4ee7-a95e-d7f21d108cd6/bin-2019/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-28 13:33:02,032 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-11-28 13:33:02,032 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2018-11-28 13:33:02,032 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2018-11-28 13:33:02,032 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2018-11-28 13:33:02,032 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2018-11-28 13:33:02,033 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-11-28 13:33:02,033 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2018-11-28 13:33:02,033 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-11-28 13:33:02,033 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2018-11-28 13:33:02,033 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-28 13:33:02,033 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-28 13:33:02,034 WARN L198 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2018-11-28 13:33:02,210 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-28 13:33:02,210 INFO L280 CfgBuilder]: Removed 6 assue(true) statements. [2018-11-28 13:33:02,210 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 01:33:02 BoogieIcfgContainer [2018-11-28 13:33:02,210 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-28 13:33:02,211 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-28 13:33:02,211 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-28 13:33:02,213 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-28 13:33:02,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 01:33:01" (1/3) ... [2018-11-28 13:33:02,214 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3393c72e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 01:33:02, skipping insertion in model container [2018-11-28 13:33:02,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:33:01" (2/3) ... [2018-11-28 13:33:02,215 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3393c72e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 01:33:02, skipping insertion in model container [2018-11-28 13:33:02,215 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 01:33:02" (3/3) ... [2018-11-28 13:33:02,216 INFO L112 eAbstractionObserver]: Analyzing ICFG triangular_true-unreach-call.i [2018-11-28 13:33:02,240 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 13:33:02,240 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 13:33:02,240 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 13:33:02,240 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 13:33:02,240 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 13:33:02,240 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 13:33:02,241 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 13:33:02,241 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 13:33:02,241 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 13:33:02,241 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 13:33:02,241 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 13:33:02,242 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 13:33:02,242 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 13:33:02,243 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 13:33:02,243 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 13:33:02,243 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 13:33:02,243 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 13:33:02,243 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 13:33:02,243 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 13:33:02,244 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 13:33:02,244 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 13:33:02,244 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 13:33:02,244 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 13:33:02,244 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 13:33:02,244 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 13:33:02,245 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 13:33:02,245 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 13:33:02,245 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 13:33:02,250 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2018-11-28 13:33:02,250 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-28 13:33:02,255 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-28 13:33:02,264 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-28 13:33:02,278 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-28 13:33:02,279 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-28 13:33:02,279 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-28 13:33:02,279 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-28 13:33:02,279 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-28 13:33:02,279 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-28 13:33:02,279 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-28 13:33:02,279 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-28 13:33:02,279 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-28 13:33:02,284 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 46places, 48 transitions [2018-11-28 13:33:02,326 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 1012 states. [2018-11-28 13:33:02,328 INFO L276 IsEmpty]: Start isEmpty. Operand 1012 states. [2018-11-28 13:33:02,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-11-28 13:33:02,336 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:33:02,337 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:33:02,338 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:33:02,343 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:33:02,343 INFO L82 PathProgramCache]: Analyzing trace with hash 573491188, now seen corresponding path program 1 times [2018-11-28 13:33:02,345 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:33:02,345 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:33:02,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:33:02,382 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:33:02,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:33:02,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:33:02,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:33:02,522 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 13:33:02,523 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-28 13:33:02,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-28 13:33:02,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-28 13:33:02,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-11-28 13:33:02,535 INFO L87 Difference]: Start difference. First operand 1012 states. Second operand 5 states. [2018-11-28 13:33:02,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:33:02,625 INFO L93 Difference]: Finished difference Result 1411 states and 4051 transitions. [2018-11-28 13:33:02,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-28 13:33:02,626 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2018-11-28 13:33:02,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:33:02,639 INFO L225 Difference]: With dead ends: 1411 [2018-11-28 13:33:02,639 INFO L226 Difference]: Without dead ends: 322 [2018-11-28 13:33:02,641 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-11-28 13:33:02,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2018-11-28 13:33:02,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 322. [2018-11-28 13:33:02,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 322 states. [2018-11-28 13:33:02,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 820 transitions. [2018-11-28 13:33:02,680 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 820 transitions. Word has length 19 [2018-11-28 13:33:02,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:33:02,680 INFO L480 AbstractCegarLoop]: Abstraction has 322 states and 820 transitions. [2018-11-28 13:33:02,680 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-28 13:33:02,680 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 820 transitions. [2018-11-28 13:33:02,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-11-28 13:33:02,681 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:33:02,681 INFO L402 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] [2018-11-28 13:33:02,682 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:33:02,682 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:33:02,682 INFO L82 PathProgramCache]: Analyzing trace with hash -143811728, now seen corresponding path program 1 times [2018-11-28 13:33:02,682 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:33:02,682 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:33:02,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:33:02,687 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:33:02,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:33:02,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:33:02,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:33:02,757 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 13:33:02,757 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-28 13:33:02,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-28 13:33:02,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-28 13:33:02,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-11-28 13:33:02,759 INFO L87 Difference]: Start difference. First operand 322 states and 820 transitions. Second operand 5 states. [2018-11-28 13:33:02,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:33:02,791 INFO L93 Difference]: Finished difference Result 411 states and 998 transitions. [2018-11-28 13:33:02,791 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-28 13:33:02,791 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2018-11-28 13:33:02,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:33:02,793 INFO L225 Difference]: With dead ends: 411 [2018-11-28 13:33:02,793 INFO L226 Difference]: Without dead ends: 290 [2018-11-28 13:33:02,794 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-11-28 13:33:02,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2018-11-28 13:33:02,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 290. [2018-11-28 13:33:02,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 290 states. [2018-11-28 13:33:02,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 714 transitions. [2018-11-28 13:33:02,805 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 714 transitions. Word has length 22 [2018-11-28 13:33:02,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:33:02,805 INFO L480 AbstractCegarLoop]: Abstraction has 290 states and 714 transitions. [2018-11-28 13:33:02,805 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-28 13:33:02,806 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 714 transitions. [2018-11-28 13:33:02,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-11-28 13:33:02,806 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:33:02,807 INFO L402 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] [2018-11-28 13:33:02,807 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:33:02,807 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:33:02,807 INFO L82 PathProgramCache]: Analyzing trace with hash 28324926, now seen corresponding path program 1 times [2018-11-28 13:33:02,807 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:33:02,807 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:33:02,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:33:02,811 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:33:02,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:33:02,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:33:02,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:33:02,884 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 13:33:02,884 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-28 13:33:02,885 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-28 13:33:02,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-28 13:33:02,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-11-28 13:33:02,885 INFO L87 Difference]: Start difference. First operand 290 states and 714 transitions. Second operand 6 states. [2018-11-28 13:33:02,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:33:02,926 INFO L93 Difference]: Finished difference Result 437 states and 1057 transitions. [2018-11-28 13:33:02,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-28 13:33:02,926 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2018-11-28 13:33:02,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:33:02,928 INFO L225 Difference]: With dead ends: 437 [2018-11-28 13:33:02,928 INFO L226 Difference]: Without dead ends: 309 [2018-11-28 13:33:02,928 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-11-28 13:33:02,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2018-11-28 13:33:02,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 299. [2018-11-28 13:33:02,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2018-11-28 13:33:02,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 732 transitions. [2018-11-28 13:33:02,938 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 732 transitions. Word has length 25 [2018-11-28 13:33:02,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:33:02,938 INFO L480 AbstractCegarLoop]: Abstraction has 299 states and 732 transitions. [2018-11-28 13:33:02,938 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-28 13:33:02,938 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 732 transitions. [2018-11-28 13:33:02,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-11-28 13:33:02,939 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:33:02,939 INFO L402 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] [2018-11-28 13:33:02,939 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:33:02,940 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:33:02,940 INFO L82 PathProgramCache]: Analyzing trace with hash 19387626, now seen corresponding path program 2 times [2018-11-28 13:33:02,940 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:33:02,940 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:33:02,943 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:33:02,943 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:33:02,943 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:33:02,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:33:03,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:33:03,002 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 13:33:03,002 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-28 13:33:03,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-28 13:33:03,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-28 13:33:03,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-11-28 13:33:03,003 INFO L87 Difference]: Start difference. First operand 299 states and 732 transitions. Second operand 6 states. [2018-11-28 13:33:03,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:33:03,048 INFO L93 Difference]: Finished difference Result 456 states and 1095 transitions. [2018-11-28 13:33:03,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-28 13:33:03,049 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2018-11-28 13:33:03,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:33:03,050 INFO L225 Difference]: With dead ends: 456 [2018-11-28 13:33:03,050 INFO L226 Difference]: Without dead ends: 319 [2018-11-28 13:33:03,051 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-11-28 13:33:03,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2018-11-28 13:33:03,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 319. [2018-11-28 13:33:03,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2018-11-28 13:33:03,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 772 transitions. [2018-11-28 13:33:03,059 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 772 transitions. Word has length 25 [2018-11-28 13:33:03,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:33:03,059 INFO L480 AbstractCegarLoop]: Abstraction has 319 states and 772 transitions. [2018-11-28 13:33:03,059 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-28 13:33:03,059 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 772 transitions. [2018-11-28 13:33:03,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-11-28 13:33:03,060 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:33:03,060 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:33:03,062 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:33:03,062 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:33:03,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1592611961, now seen corresponding path program 1 times [2018-11-28 13:33:03,062 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:33:03,063 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:33:03,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:33:03,066 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:33:03,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:33:03,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:33:03,133 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:33:03,134 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:33:03,134 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f162daff-b454-4ee7-a95e-d7f21d108cd6/bin-2019/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 13:33:03,156 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:33:03,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:33:03,179 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:33:03,220 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:33:03,235 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:33:03,235 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-11-28 13:33:03,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-28 13:33:03,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-28 13:33:03,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-11-28 13:33:03,236 INFO L87 Difference]: Start difference. First operand 319 states and 772 transitions. Second operand 8 states. [2018-11-28 13:33:03,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:33:03,308 INFO L93 Difference]: Finished difference Result 466 states and 1115 transitions. [2018-11-28 13:33:03,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-28 13:33:03,309 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2018-11-28 13:33:03,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:33:03,310 INFO L225 Difference]: With dead ends: 466 [2018-11-28 13:33:03,310 INFO L226 Difference]: Without dead ends: 335 [2018-11-28 13:33:03,311 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2018-11-28 13:33:03,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2018-11-28 13:33:03,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 300. [2018-11-28 13:33:03,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 300 states. [2018-11-28 13:33:03,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 734 transitions. [2018-11-28 13:33:03,319 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 734 transitions. Word has length 29 [2018-11-28 13:33:03,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:33:03,319 INFO L480 AbstractCegarLoop]: Abstraction has 300 states and 734 transitions. [2018-11-28 13:33:03,319 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-28 13:33:03,319 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 734 transitions. [2018-11-28 13:33:03,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-11-28 13:33:03,320 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:33:03,321 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:33:03,321 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:33:03,321 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:33:03,321 INFO L82 PathProgramCache]: Analyzing trace with hash 2035666861, now seen corresponding path program 1 times [2018-11-28 13:33:03,321 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:33:03,321 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:33:03,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:33:03,325 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:33:03,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:33:03,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:33:03,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:33:03,386 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:33:03,386 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f162daff-b454-4ee7-a95e-d7f21d108cd6/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 [2018-11-28 13:33:03,408 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:33:03,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:33:03,425 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:33:03,446 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:33:03,476 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:33:03,476 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-11-28 13:33:03,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-28 13:33:03,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-28 13:33:03,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-11-28 13:33:03,477 INFO L87 Difference]: Start difference. First operand 300 states and 734 transitions. Second operand 8 states. [2018-11-28 13:33:03,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:33:03,564 INFO L93 Difference]: Finished difference Result 482 states and 1147 transitions. [2018-11-28 13:33:03,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-28 13:33:03,565 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2018-11-28 13:33:03,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:33:03,567 INFO L225 Difference]: With dead ends: 482 [2018-11-28 13:33:03,567 INFO L226 Difference]: Without dead ends: 351 [2018-11-28 13:33:03,568 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2018-11-28 13:33:03,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2018-11-28 13:33:03,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 351. [2018-11-28 13:33:03,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351 states. [2018-11-28 13:33:03,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 836 transitions. [2018-11-28 13:33:03,577 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 836 transitions. Word has length 29 [2018-11-28 13:33:03,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:33:03,577 INFO L480 AbstractCegarLoop]: Abstraction has 351 states and 836 transitions. [2018-11-28 13:33:03,578 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-28 13:33:03,578 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 836 transitions. [2018-11-28 13:33:03,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-11-28 13:33:03,579 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:33:03,579 INFO L402 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] [2018-11-28 13:33:03,579 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:33:03,579 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:33:03,580 INFO L82 PathProgramCache]: Analyzing trace with hash -460714038, now seen corresponding path program 1 times [2018-11-28 13:33:03,580 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:33:03,580 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:33:03,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:33:03,583 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:33:03,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:33:03,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:33:03,664 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:33:03,664 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:33:03,664 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f162daff-b454-4ee7-a95e-d7f21d108cd6/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 [2018-11-28 13:33:03,684 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:33:03,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:33:03,702 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:33:03,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:33:03,736 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:33:03,736 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2018-11-28 13:33:03,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-28 13:33:03,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-28 13:33:03,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2018-11-28 13:33:03,736 INFO L87 Difference]: Start difference. First operand 351 states and 836 transitions. Second operand 9 states. [2018-11-28 13:33:03,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:33:03,820 INFO L93 Difference]: Finished difference Result 498 states and 1179 transitions. [2018-11-28 13:33:03,820 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-28 13:33:03,820 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2018-11-28 13:33:03,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:33:03,821 INFO L225 Difference]: With dead ends: 498 [2018-11-28 13:33:03,822 INFO L226 Difference]: Without dead ends: 367 [2018-11-28 13:33:03,822 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2018-11-28 13:33:03,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2018-11-28 13:33:03,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 316. [2018-11-28 13:33:03,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 316 states. [2018-11-28 13:33:03,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 766 transitions. [2018-11-28 13:33:03,831 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 766 transitions. Word has length 33 [2018-11-28 13:33:03,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:33:03,831 INFO L480 AbstractCegarLoop]: Abstraction has 316 states and 766 transitions. [2018-11-28 13:33:03,831 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-28 13:33:03,831 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 766 transitions. [2018-11-28 13:33:03,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-11-28 13:33:03,832 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:33:03,832 INFO L402 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] [2018-11-28 13:33:03,832 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:33:03,832 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:33:03,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1110322378, now seen corresponding path program 2 times [2018-11-28 13:33:03,833 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:33:03,833 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:33:03,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:33:03,835 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:33:03,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:33:03,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:33:03,892 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:33:03,893 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:33:03,893 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f162daff-b454-4ee7-a95e-d7f21d108cd6/bin-2019/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 13:33:03,900 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 13:33:03,912 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 13:33:03,912 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:33:03,914 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:33:03,955 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:33:03,971 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:33:03,971 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2018-11-28 13:33:03,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-28 13:33:03,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-28 13:33:03,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2018-11-28 13:33:03,972 INFO L87 Difference]: Start difference. First operand 316 states and 766 transitions. Second operand 9 states. [2018-11-28 13:33:04,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:33:04,055 INFO L93 Difference]: Finished difference Result 514 states and 1211 transitions. [2018-11-28 13:33:04,056 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-28 13:33:04,056 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2018-11-28 13:33:04,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:33:04,057 INFO L225 Difference]: With dead ends: 514 [2018-11-28 13:33:04,057 INFO L226 Difference]: Without dead ends: 383 [2018-11-28 13:33:04,058 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2018-11-28 13:33:04,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2018-11-28 13:33:04,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 383. [2018-11-28 13:33:04,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 383 states. [2018-11-28 13:33:04,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 900 transitions. [2018-11-28 13:33:04,067 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 900 transitions. Word has length 33 [2018-11-28 13:33:04,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:33:04,067 INFO L480 AbstractCegarLoop]: Abstraction has 383 states and 900 transitions. [2018-11-28 13:33:04,067 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-28 13:33:04,067 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 900 transitions. [2018-11-28 13:33:04,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-11-28 13:33:04,068 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:33:04,068 INFO L402 BasicCegarLoop]: trace histogram [3, 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] [2018-11-28 13:33:04,069 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:33:04,069 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:33:04,069 INFO L82 PathProgramCache]: Analyzing trace with hash 2061178471, now seen corresponding path program 3 times [2018-11-28 13:33:04,069 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:33:04,069 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:33:04,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:33:04,071 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:33:04,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:33:04,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:33:04,176 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:33:04,177 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:33:04,177 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f162daff-b454-4ee7-a95e-d7f21d108cd6/bin-2019/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 13:33:04,187 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 13:33:04,203 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-11-28 13:33:04,203 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:33:04,205 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:33:04,235 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:33:04,250 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:33:04,251 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2018-11-28 13:33:04,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-28 13:33:04,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-28 13:33:04,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2018-11-28 13:33:04,251 INFO L87 Difference]: Start difference. First operand 383 states and 900 transitions. Second operand 10 states. [2018-11-28 13:33:04,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:33:04,319 INFO L93 Difference]: Finished difference Result 530 states and 1243 transitions. [2018-11-28 13:33:04,320 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-28 13:33:04,320 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2018-11-28 13:33:04,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:33:04,321 INFO L225 Difference]: With dead ends: 530 [2018-11-28 13:33:04,321 INFO L226 Difference]: Without dead ends: 399 [2018-11-28 13:33:04,321 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2018-11-28 13:33:04,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2018-11-28 13:33:04,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 332. [2018-11-28 13:33:04,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 332 states. [2018-11-28 13:33:04,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 798 transitions. [2018-11-28 13:33:04,326 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 798 transitions. Word has length 37 [2018-11-28 13:33:04,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:33:04,326 INFO L480 AbstractCegarLoop]: Abstraction has 332 states and 798 transitions. [2018-11-28 13:33:04,326 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-28 13:33:04,326 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 798 transitions. [2018-11-28 13:33:04,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-11-28 13:33:04,327 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:33:04,327 INFO L402 BasicCegarLoop]: trace histogram [3, 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] [2018-11-28 13:33:04,327 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:33:04,327 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:33:04,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1649592435, now seen corresponding path program 4 times [2018-11-28 13:33:04,327 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:33:04,327 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:33:04,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:33:04,329 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:33:04,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:33:04,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:33:04,400 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:33:04,400 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:33:04,400 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f162daff-b454-4ee7-a95e-d7f21d108cd6/bin-2019/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 13:33:04,413 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 13:33:04,434 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 13:33:04,434 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:33:04,436 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:33:04,451 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:33:04,469 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:33:04,470 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2018-11-28 13:33:04,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-28 13:33:04,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-28 13:33:04,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2018-11-28 13:33:04,470 INFO L87 Difference]: Start difference. First operand 332 states and 798 transitions. Second operand 10 states. [2018-11-28 13:33:04,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:33:04,530 INFO L93 Difference]: Finished difference Result 546 states and 1275 transitions. [2018-11-28 13:33:04,531 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-28 13:33:04,531 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2018-11-28 13:33:04,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:33:04,532 INFO L225 Difference]: With dead ends: 546 [2018-11-28 13:33:04,532 INFO L226 Difference]: Without dead ends: 415 [2018-11-28 13:33:04,532 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2018-11-28 13:33:04,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2018-11-28 13:33:04,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 415. [2018-11-28 13:33:04,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 415 states. [2018-11-28 13:33:04,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 964 transitions. [2018-11-28 13:33:04,539 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 964 transitions. Word has length 37 [2018-11-28 13:33:04,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:33:04,539 INFO L480 AbstractCegarLoop]: Abstraction has 415 states and 964 transitions. [2018-11-28 13:33:04,539 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-28 13:33:04,539 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 964 transitions. [2018-11-28 13:33:04,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-11-28 13:33:04,540 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:33:04,540 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 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] [2018-11-28 13:33:04,540 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:33:04,540 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:33:04,541 INFO L82 PathProgramCache]: Analyzing trace with hash 2086800042, now seen corresponding path program 5 times [2018-11-28 13:33:04,541 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:33:04,541 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:33:04,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:33:04,542 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:33:04,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:33:04,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:33:04,608 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:33:04,608 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:33:04,609 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f162daff-b454-4ee7-a95e-d7f21d108cd6/bin-2019/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 13:33:04,617 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-28 13:33:04,627 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2018-11-28 13:33:04,627 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:33:04,629 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:33:04,642 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:33:04,656 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:33:04,657 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2018-11-28 13:33:04,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-28 13:33:04,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-28 13:33:04,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2018-11-28 13:33:04,657 INFO L87 Difference]: Start difference. First operand 415 states and 964 transitions. Second operand 11 states. [2018-11-28 13:33:04,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:33:04,756 INFO L93 Difference]: Finished difference Result 562 states and 1307 transitions. [2018-11-28 13:33:04,756 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-28 13:33:04,756 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2018-11-28 13:33:04,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:33:04,757 INFO L225 Difference]: With dead ends: 562 [2018-11-28 13:33:04,757 INFO L226 Difference]: Without dead ends: 431 [2018-11-28 13:33:04,758 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2018-11-28 13:33:04,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2018-11-28 13:33:04,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 348. [2018-11-28 13:33:04,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 348 states. [2018-11-28 13:33:04,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 830 transitions. [2018-11-28 13:33:04,762 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 830 transitions. Word has length 41 [2018-11-28 13:33:04,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:33:04,762 INFO L480 AbstractCegarLoop]: Abstraction has 348 states and 830 transitions. [2018-11-28 13:33:04,762 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-28 13:33:04,762 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 830 transitions. [2018-11-28 13:33:04,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-11-28 13:33:04,762 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:33:04,762 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 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] [2018-11-28 13:33:04,763 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:33:04,763 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:33:04,763 INFO L82 PathProgramCache]: Analyzing trace with hash 449750186, now seen corresponding path program 6 times [2018-11-28 13:33:04,763 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:33:04,763 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:33:04,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:33:04,764 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:33:04,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:33:04,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:33:04,815 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:33:04,815 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:33:04,816 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f162daff-b454-4ee7-a95e-d7f21d108cd6/bin-2019/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 13:33:04,833 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-28 13:33:04,858 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2018-11-28 13:33:04,858 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:33:04,860 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:33:04,888 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:33:04,906 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:33:04,906 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2018-11-28 13:33:04,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-28 13:33:04,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-28 13:33:04,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2018-11-28 13:33:04,907 INFO L87 Difference]: Start difference. First operand 348 states and 830 transitions. Second operand 11 states. [2018-11-28 13:33:05,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:33:05,080 INFO L93 Difference]: Finished difference Result 578 states and 1339 transitions. [2018-11-28 13:33:05,080 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-28 13:33:05,080 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2018-11-28 13:33:05,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:33:05,082 INFO L225 Difference]: With dead ends: 578 [2018-11-28 13:33:05,082 INFO L226 Difference]: Without dead ends: 447 [2018-11-28 13:33:05,082 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2018-11-28 13:33:05,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2018-11-28 13:33:05,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 447. [2018-11-28 13:33:05,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 447 states. [2018-11-28 13:33:05,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 1028 transitions. [2018-11-28 13:33:05,089 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 1028 transitions. Word has length 41 [2018-11-28 13:33:05,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:33:05,089 INFO L480 AbstractCegarLoop]: Abstraction has 447 states and 1028 transitions. [2018-11-28 13:33:05,090 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-28 13:33:05,090 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 1028 transitions. [2018-11-28 13:33:05,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-11-28 13:33:05,092 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:33:05,092 INFO L402 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:33:05,092 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:33:05,093 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:33:05,093 INFO L82 PathProgramCache]: Analyzing trace with hash 511353159, now seen corresponding path program 7 times [2018-11-28 13:33:05,093 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:33:05,093 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:33:05,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:33:05,095 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:33:05,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:33:05,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:33:05,162 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:33:05,163 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:33:05,163 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f162daff-b454-4ee7-a95e-d7f21d108cd6/bin-2019/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 13:33:05,171 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:33:05,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:33:05,183 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:33:05,204 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:33:05,219 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:33:05,220 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2018-11-28 13:33:05,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-28 13:33:05,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-28 13:33:05,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2018-11-28 13:33:05,220 INFO L87 Difference]: Start difference. First operand 447 states and 1028 transitions. Second operand 12 states. [2018-11-28 13:33:05,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:33:05,345 INFO L93 Difference]: Finished difference Result 594 states and 1371 transitions. [2018-11-28 13:33:05,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-28 13:33:05,346 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 45 [2018-11-28 13:33:05,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:33:05,347 INFO L225 Difference]: With dead ends: 594 [2018-11-28 13:33:05,347 INFO L226 Difference]: Without dead ends: 463 [2018-11-28 13:33:05,347 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2018-11-28 13:33:05,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2018-11-28 13:33:05,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 364. [2018-11-28 13:33:05,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364 states. [2018-11-28 13:33:05,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 862 transitions. [2018-11-28 13:33:05,352 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 862 transitions. Word has length 45 [2018-11-28 13:33:05,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:33:05,352 INFO L480 AbstractCegarLoop]: Abstraction has 364 states and 862 transitions. [2018-11-28 13:33:05,352 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-28 13:33:05,352 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 862 transitions. [2018-11-28 13:33:05,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-11-28 13:33:05,353 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:33:05,353 INFO L402 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:33:05,353 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:33:05,353 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:33:05,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1081163923, now seen corresponding path program 8 times [2018-11-28 13:33:05,353 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:33:05,353 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:33:05,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:33:05,355 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:33:05,355 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:33:05,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:33:05,403 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:33:05,403 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:33:05,403 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f162daff-b454-4ee7-a95e-d7f21d108cd6/bin-2019/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 13:33:05,412 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 13:33:05,426 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 13:33:05,426 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:33:05,428 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:33:05,442 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:33:05,472 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:33:05,472 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2018-11-28 13:33:05,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-28 13:33:05,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-28 13:33:05,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2018-11-28 13:33:05,472 INFO L87 Difference]: Start difference. First operand 364 states and 862 transitions. Second operand 12 states. [2018-11-28 13:33:05,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:33:05,569 INFO L93 Difference]: Finished difference Result 610 states and 1403 transitions. [2018-11-28 13:33:05,570 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-28 13:33:05,570 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 45 [2018-11-28 13:33:05,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:33:05,571 INFO L225 Difference]: With dead ends: 610 [2018-11-28 13:33:05,571 INFO L226 Difference]: Without dead ends: 479 [2018-11-28 13:33:05,571 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2018-11-28 13:33:05,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2018-11-28 13:33:05,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 479. [2018-11-28 13:33:05,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 479 states. [2018-11-28 13:33:05,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 1092 transitions. [2018-11-28 13:33:05,577 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 1092 transitions. Word has length 45 [2018-11-28 13:33:05,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:33:05,577 INFO L480 AbstractCegarLoop]: Abstraction has 479 states and 1092 transitions. [2018-11-28 13:33:05,577 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-28 13:33:05,577 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 1092 transitions. [2018-11-28 13:33:05,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-11-28 13:33:05,578 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:33:05,578 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:33:05,578 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:33:05,578 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:33:05,578 INFO L82 PathProgramCache]: Analyzing trace with hash -578738806, now seen corresponding path program 9 times [2018-11-28 13:33:05,579 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:33:05,579 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:33:05,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:33:05,580 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:33:05,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:33:05,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:33:05,690 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:33:05,691 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:33:05,691 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f162daff-b454-4ee7-a95e-d7f21d108cd6/bin-2019/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 13:33:05,701 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 13:33:05,716 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-11-28 13:33:05,717 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:33:05,719 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:33:05,742 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:33:05,759 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:33:05,759 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2018-11-28 13:33:05,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-28 13:33:05,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-28 13:33:05,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2018-11-28 13:33:05,760 INFO L87 Difference]: Start difference. First operand 479 states and 1092 transitions. Second operand 13 states. [2018-11-28 13:33:05,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:33:05,942 INFO L93 Difference]: Finished difference Result 626 states and 1435 transitions. [2018-11-28 13:33:05,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-28 13:33:05,944 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2018-11-28 13:33:05,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:33:05,946 INFO L225 Difference]: With dead ends: 626 [2018-11-28 13:33:05,946 INFO L226 Difference]: Without dead ends: 495 [2018-11-28 13:33:05,947 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2018-11-28 13:33:05,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2018-11-28 13:33:05,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 380. [2018-11-28 13:33:05,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 380 states. [2018-11-28 13:33:05,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 894 transitions. [2018-11-28 13:33:05,955 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 894 transitions. Word has length 49 [2018-11-28 13:33:05,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:33:05,955 INFO L480 AbstractCegarLoop]: Abstraction has 380 states and 894 transitions. [2018-11-28 13:33:05,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-28 13:33:05,955 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 894 transitions. [2018-11-28 13:33:05,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-11-28 13:33:05,956 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:33:05,956 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:33:05,956 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:33:05,956 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:33:05,957 INFO L82 PathProgramCache]: Analyzing trace with hash -555139958, now seen corresponding path program 10 times [2018-11-28 13:33:05,957 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:33:05,958 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:33:05,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:33:05,973 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:33:05,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:33:05,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:33:06,040 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:33:06,041 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:33:06,041 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f162daff-b454-4ee7-a95e-d7f21d108cd6/bin-2019/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 13:33:06,054 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 13:33:06,074 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 13:33:06,074 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:33:06,076 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:33:06,092 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:33:06,109 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:33:06,109 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2018-11-28 13:33:06,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-28 13:33:06,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-28 13:33:06,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2018-11-28 13:33:06,110 INFO L87 Difference]: Start difference. First operand 380 states and 894 transitions. Second operand 13 states. [2018-11-28 13:33:06,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:33:06,281 INFO L93 Difference]: Finished difference Result 642 states and 1467 transitions. [2018-11-28 13:33:06,282 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-28 13:33:06,282 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2018-11-28 13:33:06,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:33:06,284 INFO L225 Difference]: With dead ends: 642 [2018-11-28 13:33:06,284 INFO L226 Difference]: Without dead ends: 511 [2018-11-28 13:33:06,284 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2018-11-28 13:33:06,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2018-11-28 13:33:06,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 511. [2018-11-28 13:33:06,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 511 states. [2018-11-28 13:33:06,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 1156 transitions. [2018-11-28 13:33:06,291 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 1156 transitions. Word has length 49 [2018-11-28 13:33:06,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:33:06,291 INFO L480 AbstractCegarLoop]: Abstraction has 511 states and 1156 transitions. [2018-11-28 13:33:06,291 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-28 13:33:06,291 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 1156 transitions. [2018-11-28 13:33:06,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-11-28 13:33:06,292 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:33:06,292 INFO L402 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 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] [2018-11-28 13:33:06,292 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:33:06,292 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:33:06,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1389448231, now seen corresponding path program 11 times [2018-11-28 13:33:06,292 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:33:06,292 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:33:06,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:33:06,294 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:33:06,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:33:06,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:33:06,375 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:33:06,375 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:33:06,375 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f162daff-b454-4ee7-a95e-d7f21d108cd6/bin-2019/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 13:33:06,384 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-28 13:33:06,423 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2018-11-28 13:33:06,423 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:33:06,425 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:33:06,455 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:33:06,481 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:33:06,482 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2018-11-28 13:33:06,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-28 13:33:06,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-28 13:33:06,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2018-11-28 13:33:06,483 INFO L87 Difference]: Start difference. First operand 511 states and 1156 transitions. Second operand 14 states. [2018-11-28 13:33:06,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:33:06,610 INFO L93 Difference]: Finished difference Result 658 states and 1499 transitions. [2018-11-28 13:33:06,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-28 13:33:06,610 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 53 [2018-11-28 13:33:06,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:33:06,611 INFO L225 Difference]: With dead ends: 658 [2018-11-28 13:33:06,611 INFO L226 Difference]: Without dead ends: 527 [2018-11-28 13:33:06,612 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2018-11-28 13:33:06,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2018-11-28 13:33:06,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 396. [2018-11-28 13:33:06,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 396 states. [2018-11-28 13:33:06,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 926 transitions. [2018-11-28 13:33:06,621 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 926 transitions. Word has length 53 [2018-11-28 13:33:06,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:33:06,621 INFO L480 AbstractCegarLoop]: Abstraction has 396 states and 926 transitions. [2018-11-28 13:33:06,621 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-28 13:33:06,621 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 926 transitions. [2018-11-28 13:33:06,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-11-28 13:33:06,622 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:33:06,622 INFO L402 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 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] [2018-11-28 13:33:06,622 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:33:06,622 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:33:06,622 INFO L82 PathProgramCache]: Analyzing trace with hash 1121609549, now seen corresponding path program 12 times [2018-11-28 13:33:06,623 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:33:06,623 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:33:06,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:33:06,624 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:33:06,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:33:06,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:33:06,691 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:33:06,691 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:33:06,691 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f162daff-b454-4ee7-a95e-d7f21d108cd6/bin-2019/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 13:33:06,699 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-28 13:33:06,715 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-11-28 13:33:06,716 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:33:06,717 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:33:06,733 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:33:06,762 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:33:06,762 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2018-11-28 13:33:06,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-28 13:33:06,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-28 13:33:06,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2018-11-28 13:33:06,763 INFO L87 Difference]: Start difference. First operand 396 states and 926 transitions. Second operand 14 states. [2018-11-28 13:33:06,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:33:06,915 INFO L93 Difference]: Finished difference Result 674 states and 1531 transitions. [2018-11-28 13:33:06,915 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-28 13:33:06,915 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 53 [2018-11-28 13:33:06,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:33:06,916 INFO L225 Difference]: With dead ends: 674 [2018-11-28 13:33:06,916 INFO L226 Difference]: Without dead ends: 543 [2018-11-28 13:33:06,917 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=161, Invalid=391, Unknown=0, NotChecked=0, Total=552 [2018-11-28 13:33:06,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2018-11-28 13:33:06,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 543. [2018-11-28 13:33:06,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 543 states. [2018-11-28 13:33:06,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 1220 transitions. [2018-11-28 13:33:06,922 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 1220 transitions. Word has length 53 [2018-11-28 13:33:06,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:33:06,922 INFO L480 AbstractCegarLoop]: Abstraction has 543 states and 1220 transitions. [2018-11-28 13:33:06,922 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-28 13:33:06,922 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 1220 transitions. [2018-11-28 13:33:06,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-11-28 13:33:06,923 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:33:06,923 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 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] [2018-11-28 13:33:06,923 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:33:06,923 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:33:06,924 INFO L82 PathProgramCache]: Analyzing trace with hash 1590124650, now seen corresponding path program 13 times [2018-11-28 13:33:06,924 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:33:06,924 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:33:06,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:33:06,925 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:33:06,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:33:06,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:33:07,009 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:33:07,009 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:33:07,009 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f162daff-b454-4ee7-a95e-d7f21d108cd6/bin-2019/uautomizer/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 13:33:07,020 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:33:07,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:33:07,036 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:33:07,054 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:33:07,084 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:33:07,084 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2018-11-28 13:33:07,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-28 13:33:07,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-28 13:33:07,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2018-11-28 13:33:07,085 INFO L87 Difference]: Start difference. First operand 543 states and 1220 transitions. Second operand 15 states. [2018-11-28 13:33:07,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:33:07,232 INFO L93 Difference]: Finished difference Result 690 states and 1563 transitions. [2018-11-28 13:33:07,232 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-28 13:33:07,233 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 57 [2018-11-28 13:33:07,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:33:07,234 INFO L225 Difference]: With dead ends: 690 [2018-11-28 13:33:07,234 INFO L226 Difference]: Without dead ends: 559 [2018-11-28 13:33:07,234 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=203, Invalid=447, Unknown=0, NotChecked=0, Total=650 [2018-11-28 13:33:07,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2018-11-28 13:33:07,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 412. [2018-11-28 13:33:07,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 412 states. [2018-11-28 13:33:07,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 958 transitions. [2018-11-28 13:33:07,238 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 958 transitions. Word has length 57 [2018-11-28 13:33:07,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:33:07,239 INFO L480 AbstractCegarLoop]: Abstraction has 412 states and 958 transitions. [2018-11-28 13:33:07,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-28 13:33:07,239 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 958 transitions. [2018-11-28 13:33:07,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-11-28 13:33:07,239 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:33:07,239 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 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] [2018-11-28 13:33:07,239 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:33:07,239 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:33:07,239 INFO L82 PathProgramCache]: Analyzing trace with hash 39711850, now seen corresponding path program 14 times [2018-11-28 13:33:07,240 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:33:07,240 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:33:07,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:33:07,241 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:33:07,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:33:07,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:33:07,324 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:33:07,324 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:33:07,324 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f162daff-b454-4ee7-a95e-d7f21d108cd6/bin-2019/uautomizer/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 13:33:07,332 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 13:33:07,347 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 13:33:07,347 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:33:07,348 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:33:07,367 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:33:07,384 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:33:07,385 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2018-11-28 13:33:07,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-28 13:33:07,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-28 13:33:07,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2018-11-28 13:33:07,385 INFO L87 Difference]: Start difference. First operand 412 states and 958 transitions. Second operand 15 states. [2018-11-28 13:33:07,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:33:07,535 INFO L93 Difference]: Finished difference Result 706 states and 1595 transitions. [2018-11-28 13:33:07,535 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-28 13:33:07,536 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 57 [2018-11-28 13:33:07,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:33:07,537 INFO L225 Difference]: With dead ends: 706 [2018-11-28 13:33:07,537 INFO L226 Difference]: Without dead ends: 575 [2018-11-28 13:33:07,538 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=196, Invalid=454, Unknown=0, NotChecked=0, Total=650 [2018-11-28 13:33:07,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2018-11-28 13:33:07,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 575. [2018-11-28 13:33:07,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 575 states. [2018-11-28 13:33:07,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 1284 transitions. [2018-11-28 13:33:07,544 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 1284 transitions. Word has length 57 [2018-11-28 13:33:07,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:33:07,545 INFO L480 AbstractCegarLoop]: Abstraction has 575 states and 1284 transitions. [2018-11-28 13:33:07,545 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-28 13:33:07,545 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 1284 transitions. [2018-11-28 13:33:07,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-11-28 13:33:07,546 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:33:07,546 INFO L402 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 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] [2018-11-28 13:33:07,546 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:33:07,546 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:33:07,546 INFO L82 PathProgramCache]: Analyzing trace with hash -21031161, now seen corresponding path program 15 times [2018-11-28 13:33:07,546 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:33:07,546 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:33:07,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:33:07,548 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:33:07,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:33:07,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:33:07,628 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 60 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:33:07,629 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:33:07,629 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f162daff-b454-4ee7-a95e-d7f21d108cd6/bin-2019/uautomizer/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 13:33:07,637 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 13:33:07,657 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-11-28 13:33:07,657 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:33:07,660 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:33:07,678 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:33:07,694 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-28 13:33:07,694 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 15 [2018-11-28 13:33:07,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-28 13:33:07,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-28 13:33:07,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2018-11-28 13:33:07,695 INFO L87 Difference]: Start difference. First operand 575 states and 1284 transitions. Second operand 15 states. [2018-11-28 13:33:07,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:33:07,815 INFO L93 Difference]: Finished difference Result 1199 states and 2426 transitions. [2018-11-28 13:33:07,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-11-28 13:33:07,816 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 61 [2018-11-28 13:33:07,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:33:07,817 INFO L225 Difference]: With dead ends: 1199 [2018-11-28 13:33:07,817 INFO L226 Difference]: Without dead ends: 407 [2018-11-28 13:33:07,817 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2018-11-28 13:33:07,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2018-11-28 13:33:07,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 407. [2018-11-28 13:33:07,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 407 states. [2018-11-28 13:33:07,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 897 transitions. [2018-11-28 13:33:07,821 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 897 transitions. Word has length 61 [2018-11-28 13:33:07,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:33:07,821 INFO L480 AbstractCegarLoop]: Abstraction has 407 states and 897 transitions. [2018-11-28 13:33:07,821 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-28 13:33:07,821 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 897 transitions. [2018-11-28 13:33:07,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-11-28 13:33:07,822 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:33:07,822 INFO L402 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 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] [2018-11-28 13:33:07,822 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:33:07,822 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:33:07,823 INFO L82 PathProgramCache]: Analyzing trace with hash -1418711251, now seen corresponding path program 16 times [2018-11-28 13:33:07,823 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:33:07,823 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:33:07,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:33:07,824 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:33:07,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:33:07,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:33:07,897 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 47 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:33:07,897 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:33:07,897 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f162daff-b454-4ee7-a95e-d7f21d108cd6/bin-2019/uautomizer/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 13:33:07,906 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 13:33:07,925 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 13:33:07,925 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:33:07,927 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:33:07,948 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:33:07,965 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-28 13:33:07,965 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 15 [2018-11-28 13:33:07,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-28 13:33:07,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-28 13:33:07,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2018-11-28 13:33:07,966 INFO L87 Difference]: Start difference. First operand 407 states and 897 transitions. Second operand 15 states. [2018-11-28 13:33:08,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:33:08,053 INFO L93 Difference]: Finished difference Result 563 states and 1005 transitions. [2018-11-28 13:33:08,054 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-11-28 13:33:08,054 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 61 [2018-11-28 13:33:08,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:33:08,054 INFO L225 Difference]: With dead ends: 563 [2018-11-28 13:33:08,054 INFO L226 Difference]: Without dead ends: 0 [2018-11-28 13:33:08,055 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2018-11-28 13:33:08,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-28 13:33:08,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-28 13:33:08,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-28 13:33:08,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-28 13:33:08,055 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 61 [2018-11-28 13:33:08,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:33:08,055 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-28 13:33:08,055 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-28 13:33:08,055 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-28 13:33:08,056 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-28 13:33:08,058 INFO L305 ceAbstractionStarter]: Did not count any witness invariants because Icfg is not BoogieIcfg [2018-11-28 13:33:08,059 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 01:33:08 BasicIcfg [2018-11-28 13:33:08,060 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-28 13:33:08,060 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-28 13:33:08,060 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-28 13:33:08,060 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-28 13:33:08,061 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 01:33:02" (3/4) ... [2018-11-28 13:33:08,064 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-28 13:33:08,070 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure t1 [2018-11-28 13:33:08,070 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure t2 [2018-11-28 13:33:08,072 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2018-11-28 13:33:08,072 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2018-11-28 13:33:08,072 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-28 13:33:08,100 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_f162daff-b454-4ee7-a95e-d7f21d108cd6/bin-2019/uautomizer/witness.graphml [2018-11-28 13:33:08,101 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-28 13:33:08,101 INFO L168 Benchmark]: Toolchain (without parser) took 6504.56 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 291.5 MB). Free memory was 949.6 MB in the beginning and 1.2 GB in the end (delta: -240.4 MB). Peak memory consumption was 51.1 MB. Max. memory is 11.5 GB. [2018-11-28 13:33:08,102 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 979.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 13:33:08,103 INFO L168 Benchmark]: CACSL2BoogieTranslator took 354.95 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 112.2 MB). Free memory was 949.6 MB in the beginning and 1.1 GB in the end (delta: -143.1 MB). Peak memory consumption was 33.0 MB. Max. memory is 11.5 GB. [2018-11-28 13:33:08,103 INFO L168 Benchmark]: Boogie Procedure Inliner took 28.83 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 3.5 MB). Peak memory consumption was 3.5 MB. Max. memory is 11.5 GB. [2018-11-28 13:33:08,103 INFO L168 Benchmark]: Boogie Preprocessor took 14.70 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 13:33:08,103 INFO L168 Benchmark]: RCFGBuilder took 213.59 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 21.4 MB). Peak memory consumption was 21.4 MB. Max. memory is 11.5 GB. [2018-11-28 13:33:08,104 INFO L168 Benchmark]: TraceAbstraction took 5848.53 ms. Allocated memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: 179.3 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -131.3 MB). Peak memory consumption was 48.0 MB. Max. memory is 11.5 GB. [2018-11-28 13:33:08,104 INFO L168 Benchmark]: Witness Printer took 40.62 ms. Allocated memory is still 1.3 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 11.5 GB. [2018-11-28 13:33:08,106 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 979.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 354.95 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 112.2 MB). Free memory was 949.6 MB in the beginning and 1.1 GB in the end (delta: -143.1 MB). Peak memory consumption was 33.0 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 28.83 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 3.5 MB). Peak memory consumption was 3.5 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 14.70 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 213.59 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 21.4 MB). Peak memory consumption was 21.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 5848.53 ms. Allocated memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: 179.3 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -131.3 MB). Peak memory consumption was 48.0 MB. Max. memory is 11.5 GB. * Witness Printer took 40.62 ms. Allocated memory is still 1.3 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 688]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 64 locations, 1 error locations. SAFE Result, 5.7s OverallTime, 22 OverallIterations, 6 TraceHistogramMax, 2.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1339 SDtfs, 4278 SDslu, 5456 SDs, 0 SdLazy, 1062 SolverSat, 471 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1172 GetRequests, 836 SyntacticMatches, 0 SemanticMatches, 336 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 940 ImplicationChecksByTransitivity, 2.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1012occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 22 MinimizatonAttempts, 738 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.9s InterpolantComputationTime, 1711 NumberOfCodeBlocks, 1710 NumberOfCodeBlocksAsserted, 67 NumberOfCheckSat, 1671 ConstructedInterpolants, 0 QuantifiedInterpolants, 220155 SizeOfPredicates, 174 NumberOfNonLiveVariables, 2120 ConjunctsInSsa, 227 ConjunctsInUnsatCore, 40 InterpolantComputations, 6 PerfectInterpolantSequences, 253/980 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...