./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 635dfa2a Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_35f8d99d-e612-45e5-9747-0cea966293f6/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_35f8d99d-e612-45e5-9747-0cea966293f6/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_35f8d99d-e612-45e5-9747-0cea966293f6/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_35f8d99d-e612-45e5-9747-0cea966293f6/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/triangular_true-unreach-call.i -s /tmp/vcloud-vcloud-master/worker/working_dir_35f8d99d-e612-45e5-9747-0cea966293f6/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_35f8d99d-e612-45e5-9747-0cea966293f6/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 0.1.23-635dfa2 [2018-12-08 13:04:24,807 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-08 13:04:24,808 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-08 13:04:24,814 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-08 13:04:24,814 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-08 13:04:24,815 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-08 13:04:24,815 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-08 13:04:24,816 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-08 13:04:24,817 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-08 13:04:24,818 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-08 13:04:24,818 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-08 13:04:24,818 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-08 13:04:24,819 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-08 13:04:24,819 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-08 13:04:24,820 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-08 13:04:24,820 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-08 13:04:24,821 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-08 13:04:24,822 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-08 13:04:24,822 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-08 13:04:24,823 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-08 13:04:24,824 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-08 13:04:24,824 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-08 13:04:24,825 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-08 13:04:24,825 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-08 13:04:24,826 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-08 13:04:24,826 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-08 13:04:24,827 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-08 13:04:24,827 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-08 13:04:24,827 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-08 13:04:24,828 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-08 13:04:24,828 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-08 13:04:24,828 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-08 13:04:24,829 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-08 13:04:24,829 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-08 13:04:24,829 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-08 13:04:24,830 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-08 13:04:24,830 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_35f8d99d-e612-45e5-9747-0cea966293f6/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-12-08 13:04:24,837 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-08 13:04:24,837 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-08 13:04:24,837 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-08 13:04:24,837 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-08 13:04:24,838 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-08 13:04:24,838 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-08 13:04:24,838 INFO L133 SettingsManager]: * Use SBE=true [2018-12-08 13:04:24,838 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-08 13:04:24,838 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-08 13:04:24,838 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-08 13:04:24,839 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-08 13:04:24,839 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-08 13:04:24,839 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-08 13:04:24,839 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-08 13:04:24,839 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-08 13:04:24,839 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-08 13:04:24,839 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-08 13:04:24,839 INFO L133 SettingsManager]: * Use constant arrays=true [2018-12-08 13:04:24,840 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-08 13:04:24,840 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-08 13:04:24,840 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-08 13:04:24,840 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-08 13:04:24,840 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-08 13:04:24,840 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-08 13:04:24,840 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-08 13:04:24,840 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-08 13:04:24,841 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-08 13:04:24,841 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-12-08 13:04:24,841 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-08 13:04:24,841 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-08 13:04:24,841 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_35f8d99d-e612-45e5-9747-0cea966293f6/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 [2018-12-08 13:04:24,859 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-08 13:04:24,868 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-08 13:04:24,870 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-08 13:04:24,871 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-08 13:04:24,872 INFO L276 PluginConnector]: CDTParser initialized [2018-12-08 13:04:24,872 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_35f8d99d-e612-45e5-9747-0cea966293f6/bin-2019/uautomizer/../../sv-benchmarks/c/pthread/triangular_true-unreach-call.i [2018-12-08 13:04:24,913 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_35f8d99d-e612-45e5-9747-0cea966293f6/bin-2019/uautomizer/data/1a0986fdf/71d9126bee7848fd887c3a6c82115a99/FLAGb2c9e69dc [2018-12-08 13:04:25,373 INFO L307 CDTParser]: Found 1 translation units. [2018-12-08 13:04:25,373 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_35f8d99d-e612-45e5-9747-0cea966293f6/sv-benchmarks/c/pthread/triangular_true-unreach-call.i [2018-12-08 13:04:25,381 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_35f8d99d-e612-45e5-9747-0cea966293f6/bin-2019/uautomizer/data/1a0986fdf/71d9126bee7848fd887c3a6c82115a99/FLAGb2c9e69dc [2018-12-08 13:04:25,389 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_35f8d99d-e612-45e5-9747-0cea966293f6/bin-2019/uautomizer/data/1a0986fdf/71d9126bee7848fd887c3a6c82115a99 [2018-12-08 13:04:25,391 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-08 13:04:25,392 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-08 13:04:25,392 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-08 13:04:25,392 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-08 13:04:25,394 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-08 13:04:25,395 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.12 01:04:25" (1/1) ... [2018-12-08 13:04:25,396 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58dfd927 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 01:04:25, skipping insertion in model container [2018-12-08 13:04:25,396 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.12 01:04:25" (1/1) ... [2018-12-08 13:04:25,400 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-08 13:04:25,419 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-08 13:04:25,574 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-08 13:04:25,580 INFO L191 MainTranslator]: Completed pre-run [2018-12-08 13:04:25,640 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-08 13:04:25,669 INFO L195 MainTranslator]: Completed translation [2018-12-08 13:04:25,670 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 01:04:25 WrapperNode [2018-12-08 13:04:25,670 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-08 13:04:25,670 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-08 13:04:25,670 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-08 13:04:25,670 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-08 13:04:25,676 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 01:04:25" (1/1) ... [2018-12-08 13:04:25,684 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 01:04:25" (1/1) ... [2018-12-08 13:04:25,696 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-08 13:04:25,696 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-08 13:04:25,696 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-08 13:04:25,696 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-08 13:04:25,702 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 01:04:25" (1/1) ... [2018-12-08 13:04:25,702 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 01:04:25" (1/1) ... [2018-12-08 13:04:25,703 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 01:04:25" (1/1) ... [2018-12-08 13:04:25,703 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 01:04:25" (1/1) ... [2018-12-08 13:04:25,706 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 01:04:25" (1/1) ... [2018-12-08 13:04:25,709 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 01:04:25" (1/1) ... [2018-12-08 13:04:25,710 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 01:04:25" (1/1) ... [2018-12-08 13:04:25,711 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-08 13:04:25,711 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-08 13:04:25,711 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-08 13:04:25,711 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-08 13:04:25,712 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 01:04:25" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_35f8d99d-e612-45e5-9747-0cea966293f6/bin-2019/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-08 13:04:25,746 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-12-08 13:04:25,746 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2018-12-08 13:04:25,746 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2018-12-08 13:04:25,746 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2018-12-08 13:04:25,746 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2018-12-08 13:04:25,746 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-12-08 13:04:25,746 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2018-12-08 13:04:25,747 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-12-08 13:04:25,747 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2018-12-08 13:04:25,747 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-08 13:04:25,747 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-08 13:04:25,748 WARN L198 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2018-12-08 13:04:25,931 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-08 13:04:25,931 INFO L280 CfgBuilder]: Removed 6 assue(true) statements. [2018-12-08 13:04:25,931 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 01:04:25 BoogieIcfgContainer [2018-12-08 13:04:25,931 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-08 13:04:25,932 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-08 13:04:25,932 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-08 13:04:25,934 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-08 13:04:25,934 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.12 01:04:25" (1/3) ... [2018-12-08 13:04:25,935 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a537d7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.12 01:04:25, skipping insertion in model container [2018-12-08 13:04:25,935 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 01:04:25" (2/3) ... [2018-12-08 13:04:25,936 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a537d7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.12 01:04:25, skipping insertion in model container [2018-12-08 13:04:25,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 01:04:25" (3/3) ... [2018-12-08 13:04:25,937 INFO L112 eAbstractionObserver]: Analyzing ICFG triangular_true-unreach-call.i [2018-12-08 13:04:25,963 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 13:04:25,964 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 13:04:25,964 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 13:04:25,964 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 13:04:25,964 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 13:04:25,964 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 13:04:25,965 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 13:04:25,965 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 13:04:25,965 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 13:04:25,965 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 13:04:25,965 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 13:04:25,967 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 13:04:25,967 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 13:04:25,967 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 13:04:25,967 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 13:04:25,967 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 13:04:25,968 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 13:04:25,968 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 13:04:25,968 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 13:04:25,968 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 13:04:25,968 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 13:04:25,969 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 13:04:25,969 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 13:04:25,969 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 13:04:25,969 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 13:04:25,969 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 13:04:25,969 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 13:04:25,970 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-08 13:04:25,976 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2018-12-08 13:04:25,977 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-08 13:04:25,983 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-08 13:04:25,997 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-08 13:04:26,011 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-08 13:04:26,012 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-08 13:04:26,012 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-08 13:04:26,012 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-08 13:04:26,012 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-08 13:04:26,012 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-08 13:04:26,012 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-08 13:04:26,012 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-08 13:04:26,012 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-08 13:04:26,018 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 46places, 48 transitions [2018-12-08 13:04:26,050 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 1012 states. [2018-12-08 13:04:26,051 INFO L276 IsEmpty]: Start isEmpty. Operand 1012 states. [2018-12-08 13:04:26,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-12-08 13:04:26,056 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 13:04:26,057 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 13:04:26,058 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 13:04:26,062 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 13:04:26,062 INFO L82 PathProgramCache]: Analyzing trace with hash 573491188, now seen corresponding path program 1 times [2018-12-08 13:04:26,063 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 13:04:26,064 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 13:04:26,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 13:04:26,101 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 13:04:26,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 13:04:26,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 13:04:26,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 13:04:26,202 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 13:04:26,202 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-08 13:04:26,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-08 13:04:26,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-08 13:04:26,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-12-08 13:04:26,214 INFO L87 Difference]: Start difference. First operand 1012 states. Second operand 5 states. [2018-12-08 13:04:26,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 13:04:26,277 INFO L93 Difference]: Finished difference Result 1411 states and 4051 transitions. [2018-12-08 13:04:26,277 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-08 13:04:26,278 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2018-12-08 13:04:26,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 13:04:26,287 INFO L225 Difference]: With dead ends: 1411 [2018-12-08 13:04:26,287 INFO L226 Difference]: Without dead ends: 322 [2018-12-08 13:04:26,288 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 [2018-12-08 13:04:26,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2018-12-08 13:04:26,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 322. [2018-12-08 13:04:26,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 322 states. [2018-12-08 13:04:26,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 820 transitions. [2018-12-08 13:04:26,321 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 820 transitions. Word has length 19 [2018-12-08 13:04:26,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 13:04:26,321 INFO L480 AbstractCegarLoop]: Abstraction has 322 states and 820 transitions. [2018-12-08 13:04:26,321 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-08 13:04:26,321 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 820 transitions. [2018-12-08 13:04:26,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-12-08 13:04:26,322 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 13:04:26,322 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] [2018-12-08 13:04:26,322 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 13:04:26,322 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 13:04:26,323 INFO L82 PathProgramCache]: Analyzing trace with hash -143811728, now seen corresponding path program 1 times [2018-12-08 13:04:26,323 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 13:04:26,323 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 13:04:26,326 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 13:04:26,326 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 13:04:26,326 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 13:04:26,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 13:04:26,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 13:04:26,377 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 13:04:26,377 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-08 13:04:26,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-08 13:04:26,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-08 13:04:26,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-12-08 13:04:26,379 INFO L87 Difference]: Start difference. First operand 322 states and 820 transitions. Second operand 5 states. [2018-12-08 13:04:26,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 13:04:26,405 INFO L93 Difference]: Finished difference Result 411 states and 998 transitions. [2018-12-08 13:04:26,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-08 13:04:26,405 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2018-12-08 13:04:26,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 13:04:26,406 INFO L225 Difference]: With dead ends: 411 [2018-12-08 13:04:26,406 INFO L226 Difference]: Without dead ends: 290 [2018-12-08 13:04:26,407 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 [2018-12-08 13:04:26,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2018-12-08 13:04:26,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 290. [2018-12-08 13:04:26,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 290 states. [2018-12-08 13:04:26,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 714 transitions. [2018-12-08 13:04:26,415 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 714 transitions. Word has length 22 [2018-12-08 13:04:26,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 13:04:26,415 INFO L480 AbstractCegarLoop]: Abstraction has 290 states and 714 transitions. [2018-12-08 13:04:26,415 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-08 13:04:26,415 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 714 transitions. [2018-12-08 13:04:26,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-12-08 13:04:26,416 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 13:04:26,416 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] [2018-12-08 13:04:26,416 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 13:04:26,416 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 13:04:26,416 INFO L82 PathProgramCache]: Analyzing trace with hash 28324926, now seen corresponding path program 1 times [2018-12-08 13:04:26,417 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 13:04:26,417 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 13:04:26,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 13:04:26,419 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 13:04:26,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 13:04:26,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 13:04:26,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 13:04:26,472 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 13:04:26,472 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-12-08 13:04:26,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-08 13:04:26,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-08 13:04:26,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-12-08 13:04:26,473 INFO L87 Difference]: Start difference. First operand 290 states and 714 transitions. Second operand 6 states. [2018-12-08 13:04:26,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 13:04:26,508 INFO L93 Difference]: Finished difference Result 437 states and 1057 transitions. [2018-12-08 13:04:26,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-08 13:04:26,508 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2018-12-08 13:04:26,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 13:04:26,509 INFO L225 Difference]: With dead ends: 437 [2018-12-08 13:04:26,509 INFO L226 Difference]: Without dead ends: 309 [2018-12-08 13:04:26,509 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 [2018-12-08 13:04:26,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2018-12-08 13:04:26,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 299. [2018-12-08 13:04:26,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2018-12-08 13:04:26,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 732 transitions. [2018-12-08 13:04:26,515 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 732 transitions. Word has length 25 [2018-12-08 13:04:26,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 13:04:26,516 INFO L480 AbstractCegarLoop]: Abstraction has 299 states and 732 transitions. [2018-12-08 13:04:26,516 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-08 13:04:26,516 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 732 transitions. [2018-12-08 13:04:26,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-12-08 13:04:26,516 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 13:04:26,517 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] [2018-12-08 13:04:26,517 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 13:04:26,517 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 13:04:26,517 INFO L82 PathProgramCache]: Analyzing trace with hash 19387626, now seen corresponding path program 2 times [2018-12-08 13:04:26,517 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 13:04:26,517 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 13:04:26,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 13:04:26,519 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 13:04:26,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 13:04:26,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 13:04:26,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 13:04:26,555 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 13:04:26,555 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-12-08 13:04:26,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-08 13:04:26,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-08 13:04:26,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-12-08 13:04:26,555 INFO L87 Difference]: Start difference. First operand 299 states and 732 transitions. Second operand 6 states. [2018-12-08 13:04:26,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 13:04:26,588 INFO L93 Difference]: Finished difference Result 456 states and 1095 transitions. [2018-12-08 13:04:26,589 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-08 13:04:26,589 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2018-12-08 13:04:26,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 13:04:26,590 INFO L225 Difference]: With dead ends: 456 [2018-12-08 13:04:26,590 INFO L226 Difference]: Without dead ends: 319 [2018-12-08 13:04:26,590 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 [2018-12-08 13:04:26,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2018-12-08 13:04:26,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 319. [2018-12-08 13:04:26,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2018-12-08 13:04:26,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 772 transitions. [2018-12-08 13:04:26,597 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 772 transitions. Word has length 25 [2018-12-08 13:04:26,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 13:04:26,598 INFO L480 AbstractCegarLoop]: Abstraction has 319 states and 772 transitions. [2018-12-08 13:04:26,598 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-08 13:04:26,598 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 772 transitions. [2018-12-08 13:04:26,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-12-08 13:04:26,599 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 13:04:26,599 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] [2018-12-08 13:04:26,599 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 13:04:26,600 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 13:04:26,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1592611961, now seen corresponding path program 1 times [2018-12-08 13:04:26,600 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 13:04:26,600 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 13:04:26,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 13:04:26,603 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 13:04:26,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 13:04:26,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 13:04:26,662 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 13:04:26,662 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 13:04:26,662 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_35f8d99d-e612-45e5-9747-0cea966293f6/bin-2019/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 13:04:26,670 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 13:04:26,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 13:04:26,688 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 13:04:26,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 13:04:26,727 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 13:04:26,727 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-12-08 13:04:26,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-08 13:04:26,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-08 13:04:26,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-12-08 13:04:26,728 INFO L87 Difference]: Start difference. First operand 319 states and 772 transitions. Second operand 8 states. [2018-12-08 13:04:26,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 13:04:26,803 INFO L93 Difference]: Finished difference Result 466 states and 1115 transitions. [2018-12-08 13:04:26,803 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-08 13:04:26,804 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2018-12-08 13:04:26,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 13:04:26,805 INFO L225 Difference]: With dead ends: 466 [2018-12-08 13:04:26,805 INFO L226 Difference]: Without dead ends: 335 [2018-12-08 13:04:26,806 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 [2018-12-08 13:04:26,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2018-12-08 13:04:26,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 300. [2018-12-08 13:04:26,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 300 states. [2018-12-08 13:04:26,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 734 transitions. [2018-12-08 13:04:26,814 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 734 transitions. Word has length 29 [2018-12-08 13:04:26,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 13:04:26,815 INFO L480 AbstractCegarLoop]: Abstraction has 300 states and 734 transitions. [2018-12-08 13:04:26,815 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-08 13:04:26,815 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 734 transitions. [2018-12-08 13:04:26,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-12-08 13:04:26,816 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 13:04:26,816 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] [2018-12-08 13:04:26,816 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 13:04:26,817 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 13:04:26,817 INFO L82 PathProgramCache]: Analyzing trace with hash 2035666861, now seen corresponding path program 1 times [2018-12-08 13:04:26,817 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 13:04:26,817 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 13:04:26,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 13:04:26,820 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 13:04:26,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 13:04:26,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 13:04:26,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 13:04:26,875 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 13:04:26,875 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_35f8d99d-e612-45e5-9747-0cea966293f6/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 [2018-12-08 13:04:26,883 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 13:04:26,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 13:04:26,896 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 13:04:26,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 13:04:26,927 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 13:04:26,927 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-12-08 13:04:26,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-08 13:04:26,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-08 13:04:26,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-12-08 13:04:26,927 INFO L87 Difference]: Start difference. First operand 300 states and 734 transitions. Second operand 8 states. [2018-12-08 13:04:26,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 13:04:26,979 INFO L93 Difference]: Finished difference Result 482 states and 1147 transitions. [2018-12-08 13:04:26,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-08 13:04:26,980 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2018-12-08 13:04:26,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 13:04:26,981 INFO L225 Difference]: With dead ends: 482 [2018-12-08 13:04:26,981 INFO L226 Difference]: Without dead ends: 351 [2018-12-08 13:04:26,981 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 [2018-12-08 13:04:26,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2018-12-08 13:04:26,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 351. [2018-12-08 13:04:26,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351 states. [2018-12-08 13:04:26,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 836 transitions. [2018-12-08 13:04:26,990 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 836 transitions. Word has length 29 [2018-12-08 13:04:26,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 13:04:26,990 INFO L480 AbstractCegarLoop]: Abstraction has 351 states and 836 transitions. [2018-12-08 13:04:26,990 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-08 13:04:26,990 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 836 transitions. [2018-12-08 13:04:26,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-12-08 13:04:26,991 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 13:04:26,991 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] [2018-12-08 13:04:26,992 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 13:04:26,992 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 13:04:26,992 INFO L82 PathProgramCache]: Analyzing trace with hash -460714038, now seen corresponding path program 1 times [2018-12-08 13:04:26,992 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 13:04:26,992 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 13:04:26,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 13:04:26,994 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 13:04:26,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 13:04:27,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 13:04:27,055 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 13:04:27,055 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 13:04:27,056 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_35f8d99d-e612-45e5-9747-0cea966293f6/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 [2018-12-08 13:04:27,064 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 13:04:27,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 13:04:27,079 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 13:04:27,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 13:04:27,114 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 13:04:27,114 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2018-12-08 13:04:27,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-08 13:04:27,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-08 13:04:27,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2018-12-08 13:04:27,115 INFO L87 Difference]: Start difference. First operand 351 states and 836 transitions. Second operand 9 states. [2018-12-08 13:04:27,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 13:04:27,182 INFO L93 Difference]: Finished difference Result 498 states and 1179 transitions. [2018-12-08 13:04:27,182 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-08 13:04:27,182 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2018-12-08 13:04:27,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 13:04:27,183 INFO L225 Difference]: With dead ends: 498 [2018-12-08 13:04:27,183 INFO L226 Difference]: Without dead ends: 367 [2018-12-08 13:04:27,183 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2018-12-08 13:04:27,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2018-12-08 13:04:27,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 316. [2018-12-08 13:04:27,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 316 states. [2018-12-08 13:04:27,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 766 transitions. [2018-12-08 13:04:27,187 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 766 transitions. Word has length 33 [2018-12-08 13:04:27,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 13:04:27,187 INFO L480 AbstractCegarLoop]: Abstraction has 316 states and 766 transitions. [2018-12-08 13:04:27,187 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-08 13:04:27,187 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 766 transitions. [2018-12-08 13:04:27,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-12-08 13:04:27,188 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 13:04:27,188 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] [2018-12-08 13:04:27,188 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 13:04:27,188 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 13:04:27,188 INFO L82 PathProgramCache]: Analyzing trace with hash 1110322378, now seen corresponding path program 2 times [2018-12-08 13:04:27,188 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 13:04:27,188 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 13:04:27,189 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 13:04:27,189 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 13:04:27,189 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 13:04:27,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 13:04:27,232 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 13:04:27,232 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 13:04:27,232 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_35f8d99d-e612-45e5-9747-0cea966293f6/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 [2018-12-08 13:04:27,240 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-08 13:04:27,251 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-08 13:04:27,251 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 13:04:27,252 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 13:04:27,265 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 13:04:27,281 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 13:04:27,281 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2018-12-08 13:04:27,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-08 13:04:27,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-08 13:04:27,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2018-12-08 13:04:27,282 INFO L87 Difference]: Start difference. First operand 316 states and 766 transitions. Second operand 9 states. [2018-12-08 13:04:27,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 13:04:27,365 INFO L93 Difference]: Finished difference Result 514 states and 1211 transitions. [2018-12-08 13:04:27,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-08 13:04:27,365 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2018-12-08 13:04:27,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 13:04:27,366 INFO L225 Difference]: With dead ends: 514 [2018-12-08 13:04:27,366 INFO L226 Difference]: Without dead ends: 383 [2018-12-08 13:04:27,366 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2018-12-08 13:04:27,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2018-12-08 13:04:27,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 383. [2018-12-08 13:04:27,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 383 states. [2018-12-08 13:04:27,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 900 transitions. [2018-12-08 13:04:27,371 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 900 transitions. Word has length 33 [2018-12-08 13:04:27,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 13:04:27,371 INFO L480 AbstractCegarLoop]: Abstraction has 383 states and 900 transitions. [2018-12-08 13:04:27,372 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-08 13:04:27,372 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 900 transitions. [2018-12-08 13:04:27,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-12-08 13:04:27,372 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 13:04:27,372 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] [2018-12-08 13:04:27,373 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 13:04:27,373 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 13:04:27,373 INFO L82 PathProgramCache]: Analyzing trace with hash 2061178471, now seen corresponding path program 3 times [2018-12-08 13:04:27,373 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 13:04:27,373 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 13:04:27,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 13:04:27,375 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 13:04:27,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 13:04:27,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 13:04:27,421 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 13:04:27,422 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 13:04:27,422 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_35f8d99d-e612-45e5-9747-0cea966293f6/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 [2018-12-08 13:04:27,431 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-08 13:04:27,446 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-12-08 13:04:27,446 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 13:04:27,448 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 13:04:27,460 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 13:04:27,484 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 13:04:27,484 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2018-12-08 13:04:27,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-08 13:04:27,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-08 13:04:27,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2018-12-08 13:04:27,485 INFO L87 Difference]: Start difference. First operand 383 states and 900 transitions. Second operand 10 states. [2018-12-08 13:04:27,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 13:04:27,569 INFO L93 Difference]: Finished difference Result 530 states and 1243 transitions. [2018-12-08 13:04:27,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-08 13:04:27,569 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2018-12-08 13:04:27,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 13:04:27,570 INFO L225 Difference]: With dead ends: 530 [2018-12-08 13:04:27,570 INFO L226 Difference]: Without dead ends: 399 [2018-12-08 13:04:27,571 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2018-12-08 13:04:27,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2018-12-08 13:04:27,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 332. [2018-12-08 13:04:27,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 332 states. [2018-12-08 13:04:27,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 798 transitions. [2018-12-08 13:04:27,574 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 798 transitions. Word has length 37 [2018-12-08 13:04:27,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 13:04:27,575 INFO L480 AbstractCegarLoop]: Abstraction has 332 states and 798 transitions. [2018-12-08 13:04:27,575 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-08 13:04:27,575 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 798 transitions. [2018-12-08 13:04:27,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-12-08 13:04:27,575 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 13:04:27,575 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] [2018-12-08 13:04:27,576 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 13:04:27,576 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 13:04:27,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1649592435, now seen corresponding path program 4 times [2018-12-08 13:04:27,576 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 13:04:27,576 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 13:04:27,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 13:04:27,577 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 13:04:27,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 13:04:27,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 13:04:27,616 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 13:04:27,616 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 13:04:27,616 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_35f8d99d-e612-45e5-9747-0cea966293f6/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 [2018-12-08 13:04:27,626 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-08 13:04:27,636 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-08 13:04:27,636 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 13:04:27,637 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 13:04:27,667 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 13:04:27,681 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 13:04:27,682 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2018-12-08 13:04:27,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-08 13:04:27,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-08 13:04:27,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2018-12-08 13:04:27,682 INFO L87 Difference]: Start difference. First operand 332 states and 798 transitions. Second operand 10 states. [2018-12-08 13:04:27,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 13:04:27,737 INFO L93 Difference]: Finished difference Result 546 states and 1275 transitions. [2018-12-08 13:04:27,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-08 13:04:27,738 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2018-12-08 13:04:27,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 13:04:27,739 INFO L225 Difference]: With dead ends: 546 [2018-12-08 13:04:27,739 INFO L226 Difference]: Without dead ends: 415 [2018-12-08 13:04:27,739 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 [2018-12-08 13:04:27,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2018-12-08 13:04:27,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 415. [2018-12-08 13:04:27,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 415 states. [2018-12-08 13:04:27,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 964 transitions. [2018-12-08 13:04:27,743 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 964 transitions. Word has length 37 [2018-12-08 13:04:27,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 13:04:27,743 INFO L480 AbstractCegarLoop]: Abstraction has 415 states and 964 transitions. [2018-12-08 13:04:27,743 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-08 13:04:27,743 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 964 transitions. [2018-12-08 13:04:27,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-12-08 13:04:27,744 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 13:04:27,744 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] [2018-12-08 13:04:27,744 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 13:04:27,744 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 13:04:27,744 INFO L82 PathProgramCache]: Analyzing trace with hash 2086800042, now seen corresponding path program 5 times [2018-12-08 13:04:27,744 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 13:04:27,744 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 13:04:27,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 13:04:27,746 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 13:04:27,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 13:04:27,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 13:04:27,799 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 13:04:27,800 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 13:04:27,800 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_35f8d99d-e612-45e5-9747-0cea966293f6/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 [2018-12-08 13:04:27,810 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-08 13:04:27,821 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2018-12-08 13:04:27,821 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 13:04:27,822 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 13:04:27,834 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 13:04:27,849 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 13:04:27,849 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2018-12-08 13:04:27,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-08 13:04:27,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-08 13:04:27,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2018-12-08 13:04:27,850 INFO L87 Difference]: Start difference. First operand 415 states and 964 transitions. Second operand 11 states. [2018-12-08 13:04:27,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 13:04:27,956 INFO L93 Difference]: Finished difference Result 562 states and 1307 transitions. [2018-12-08 13:04:27,956 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-08 13:04:27,956 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2018-12-08 13:04:27,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 13:04:27,957 INFO L225 Difference]: With dead ends: 562 [2018-12-08 13:04:27,957 INFO L226 Difference]: Without dead ends: 431 [2018-12-08 13:04:27,957 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 [2018-12-08 13:04:27,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2018-12-08 13:04:27,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 348. [2018-12-08 13:04:27,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 348 states. [2018-12-08 13:04:27,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 830 transitions. [2018-12-08 13:04:27,961 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 830 transitions. Word has length 41 [2018-12-08 13:04:27,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 13:04:27,961 INFO L480 AbstractCegarLoop]: Abstraction has 348 states and 830 transitions. [2018-12-08 13:04:27,961 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-08 13:04:27,961 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 830 transitions. [2018-12-08 13:04:27,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-12-08 13:04:27,961 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 13:04:27,961 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] [2018-12-08 13:04:27,961 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 13:04:27,961 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 13:04:27,962 INFO L82 PathProgramCache]: Analyzing trace with hash 449750186, now seen corresponding path program 6 times [2018-12-08 13:04:27,962 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 13:04:27,962 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 13:04:27,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 13:04:27,963 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 13:04:27,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 13:04:27,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 13:04:28,002 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 13:04:28,003 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 13:04:28,003 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_35f8d99d-e612-45e5-9747-0cea966293f6/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 [2018-12-08 13:04:28,010 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-08 13:04:28,022 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2018-12-08 13:04:28,022 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 13:04:28,024 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 13:04:28,049 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 13:04:28,064 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 13:04:28,064 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2018-12-08 13:04:28,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-08 13:04:28,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-08 13:04:28,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2018-12-08 13:04:28,065 INFO L87 Difference]: Start difference. First operand 348 states and 830 transitions. Second operand 11 states. [2018-12-08 13:04:28,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 13:04:28,153 INFO L93 Difference]: Finished difference Result 578 states and 1339 transitions. [2018-12-08 13:04:28,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-08 13:04:28,153 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2018-12-08 13:04:28,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 13:04:28,154 INFO L225 Difference]: With dead ends: 578 [2018-12-08 13:04:28,154 INFO L226 Difference]: Without dead ends: 447 [2018-12-08 13:04:28,154 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 [2018-12-08 13:04:28,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2018-12-08 13:04:28,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 447. [2018-12-08 13:04:28,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 447 states. [2018-12-08 13:04:28,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 1028 transitions. [2018-12-08 13:04:28,158 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 1028 transitions. Word has length 41 [2018-12-08 13:04:28,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 13:04:28,158 INFO L480 AbstractCegarLoop]: Abstraction has 447 states and 1028 transitions. [2018-12-08 13:04:28,158 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-08 13:04:28,158 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 1028 transitions. [2018-12-08 13:04:28,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-12-08 13:04:28,159 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 13:04:28,159 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] [2018-12-08 13:04:28,159 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 13:04:28,159 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 13:04:28,159 INFO L82 PathProgramCache]: Analyzing trace with hash 511353159, now seen corresponding path program 7 times [2018-12-08 13:04:28,159 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 13:04:28,159 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 13:04:28,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 13:04:28,160 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 13:04:28,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 13:04:28,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 13:04:28,231 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 13:04:28,231 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 13:04:28,231 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_35f8d99d-e612-45e5-9747-0cea966293f6/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 [2018-12-08 13:04:28,238 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 13:04:28,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 13:04:28,249 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 13:04:28,264 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 13:04:28,286 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 13:04:28,286 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2018-12-08 13:04:28,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-08 13:04:28,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-08 13:04:28,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2018-12-08 13:04:28,286 INFO L87 Difference]: Start difference. First operand 447 states and 1028 transitions. Second operand 12 states. [2018-12-08 13:04:28,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 13:04:28,399 INFO L93 Difference]: Finished difference Result 594 states and 1371 transitions. [2018-12-08 13:04:28,399 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-12-08 13:04:28,399 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 45 [2018-12-08 13:04:28,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 13:04:28,400 INFO L225 Difference]: With dead ends: 594 [2018-12-08 13:04:28,400 INFO L226 Difference]: Without dead ends: 463 [2018-12-08 13:04:28,400 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 [2018-12-08 13:04:28,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2018-12-08 13:04:28,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 364. [2018-12-08 13:04:28,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364 states. [2018-12-08 13:04:28,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 862 transitions. [2018-12-08 13:04:28,404 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 862 transitions. Word has length 45 [2018-12-08 13:04:28,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 13:04:28,404 INFO L480 AbstractCegarLoop]: Abstraction has 364 states and 862 transitions. [2018-12-08 13:04:28,404 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-08 13:04:28,404 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 862 transitions. [2018-12-08 13:04:28,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-12-08 13:04:28,405 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 13:04:28,405 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] [2018-12-08 13:04:28,405 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 13:04:28,405 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 13:04:28,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1081163923, now seen corresponding path program 8 times [2018-12-08 13:04:28,405 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 13:04:28,405 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 13:04:28,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 13:04:28,406 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 13:04:28,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 13:04:28,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 13:04:28,451 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 13:04:28,452 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 13:04:28,452 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_35f8d99d-e612-45e5-9747-0cea966293f6/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 [2018-12-08 13:04:28,461 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-08 13:04:28,472 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-08 13:04:28,473 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 13:04:28,474 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 13:04:28,514 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 13:04:28,529 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 13:04:28,529 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2018-12-08 13:04:28,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-08 13:04:28,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-08 13:04:28,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2018-12-08 13:04:28,529 INFO L87 Difference]: Start difference. First operand 364 states and 862 transitions. Second operand 12 states. [2018-12-08 13:04:28,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 13:04:28,622 INFO L93 Difference]: Finished difference Result 610 states and 1403 transitions. [2018-12-08 13:04:28,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-12-08 13:04:28,622 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 45 [2018-12-08 13:04:28,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 13:04:28,623 INFO L225 Difference]: With dead ends: 610 [2018-12-08 13:04:28,623 INFO L226 Difference]: Without dead ends: 479 [2018-12-08 13:04:28,624 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 [2018-12-08 13:04:28,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2018-12-08 13:04:28,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 479. [2018-12-08 13:04:28,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 479 states. [2018-12-08 13:04:28,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 1092 transitions. [2018-12-08 13:04:28,628 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 1092 transitions. Word has length 45 [2018-12-08 13:04:28,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 13:04:28,628 INFO L480 AbstractCegarLoop]: Abstraction has 479 states and 1092 transitions. [2018-12-08 13:04:28,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-08 13:04:28,628 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 1092 transitions. [2018-12-08 13:04:28,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-12-08 13:04:28,629 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 13:04:28,629 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] [2018-12-08 13:04:28,629 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 13:04:28,629 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 13:04:28,630 INFO L82 PathProgramCache]: Analyzing trace with hash -578738806, now seen corresponding path program 9 times [2018-12-08 13:04:28,630 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 13:04:28,630 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 13:04:28,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 13:04:28,631 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 13:04:28,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 13:04:28,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 13:04:28,684 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 13:04:28,684 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 13:04:28,684 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_35f8d99d-e612-45e5-9747-0cea966293f6/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 [2018-12-08 13:04:28,692 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-08 13:04:28,703 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-12-08 13:04:28,704 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 13:04:28,705 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 13:04:28,721 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 13:04:28,737 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 13:04:28,737 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2018-12-08 13:04:28,737 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-12-08 13:04:28,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-12-08 13:04:28,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2018-12-08 13:04:28,737 INFO L87 Difference]: Start difference. First operand 479 states and 1092 transitions. Second operand 13 states. [2018-12-08 13:04:28,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 13:04:28,843 INFO L93 Difference]: Finished difference Result 626 states and 1435 transitions. [2018-12-08 13:04:28,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-12-08 13:04:28,843 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2018-12-08 13:04:28,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 13:04:28,844 INFO L225 Difference]: With dead ends: 626 [2018-12-08 13:04:28,844 INFO L226 Difference]: Without dead ends: 495 [2018-12-08 13:04:28,844 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 [2018-12-08 13:04:28,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2018-12-08 13:04:28,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 380. [2018-12-08 13:04:28,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 380 states. [2018-12-08 13:04:28,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 894 transitions. [2018-12-08 13:04:28,849 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 894 transitions. Word has length 49 [2018-12-08 13:04:28,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 13:04:28,849 INFO L480 AbstractCegarLoop]: Abstraction has 380 states and 894 transitions. [2018-12-08 13:04:28,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-12-08 13:04:28,849 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 894 transitions. [2018-12-08 13:04:28,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-12-08 13:04:28,850 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 13:04:28,850 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] [2018-12-08 13:04:28,850 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 13:04:28,850 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 13:04:28,850 INFO L82 PathProgramCache]: Analyzing trace with hash -555139958, now seen corresponding path program 10 times [2018-12-08 13:04:28,850 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 13:04:28,850 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 13:04:28,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 13:04:28,851 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 13:04:28,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 13:04:28,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 13:04:28,901 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 13:04:28,901 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 13:04:28,901 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_35f8d99d-e612-45e5-9747-0cea966293f6/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 [2018-12-08 13:04:28,908 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-08 13:04:28,918 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-08 13:04:28,918 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 13:04:28,919 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 13:04:28,945 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 13:04:28,960 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 13:04:28,960 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2018-12-08 13:04:28,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-12-08 13:04:28,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-12-08 13:04:28,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2018-12-08 13:04:28,961 INFO L87 Difference]: Start difference. First operand 380 states and 894 transitions. Second operand 13 states. [2018-12-08 13:04:29,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 13:04:29,071 INFO L93 Difference]: Finished difference Result 642 states and 1467 transitions. [2018-12-08 13:04:29,071 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-12-08 13:04:29,071 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2018-12-08 13:04:29,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 13:04:29,072 INFO L225 Difference]: With dead ends: 642 [2018-12-08 13:04:29,072 INFO L226 Difference]: Without dead ends: 511 [2018-12-08 13:04:29,073 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 [2018-12-08 13:04:29,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2018-12-08 13:04:29,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 511. [2018-12-08 13:04:29,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 511 states. [2018-12-08 13:04:29,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 1156 transitions. [2018-12-08 13:04:29,078 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 1156 transitions. Word has length 49 [2018-12-08 13:04:29,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 13:04:29,078 INFO L480 AbstractCegarLoop]: Abstraction has 511 states and 1156 transitions. [2018-12-08 13:04:29,078 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-12-08 13:04:29,078 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 1156 transitions. [2018-12-08 13:04:29,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-12-08 13:04:29,079 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 13:04:29,079 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] [2018-12-08 13:04:29,079 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 13:04:29,079 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 13:04:29,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1389448231, now seen corresponding path program 11 times [2018-12-08 13:04:29,079 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 13:04:29,079 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 13:04:29,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 13:04:29,080 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 13:04:29,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 13:04:29,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 13:04:29,139 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 13:04:29,139 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 13:04:29,139 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_35f8d99d-e612-45e5-9747-0cea966293f6/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 [2018-12-08 13:04:29,146 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-08 13:04:29,158 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2018-12-08 13:04:29,158 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 13:04:29,159 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 13:04:29,184 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 13:04:29,198 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 13:04:29,198 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2018-12-08 13:04:29,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-12-08 13:04:29,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-12-08 13:04:29,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2018-12-08 13:04:29,199 INFO L87 Difference]: Start difference. First operand 511 states and 1156 transitions. Second operand 14 states. [2018-12-08 13:04:29,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 13:04:29,306 INFO L93 Difference]: Finished difference Result 658 states and 1499 transitions. [2018-12-08 13:04:29,307 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-12-08 13:04:29,307 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 53 [2018-12-08 13:04:29,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 13:04:29,308 INFO L225 Difference]: With dead ends: 658 [2018-12-08 13:04:29,308 INFO L226 Difference]: Without dead ends: 527 [2018-12-08 13:04:29,308 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 [2018-12-08 13:04:29,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2018-12-08 13:04:29,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 396. [2018-12-08 13:04:29,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 396 states. [2018-12-08 13:04:29,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 926 transitions. [2018-12-08 13:04:29,312 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 926 transitions. Word has length 53 [2018-12-08 13:04:29,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 13:04:29,312 INFO L480 AbstractCegarLoop]: Abstraction has 396 states and 926 transitions. [2018-12-08 13:04:29,312 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-12-08 13:04:29,312 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 926 transitions. [2018-12-08 13:04:29,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-12-08 13:04:29,312 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 13:04:29,312 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] [2018-12-08 13:04:29,312 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 13:04:29,313 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 13:04:29,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1121609549, now seen corresponding path program 12 times [2018-12-08 13:04:29,313 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 13:04:29,313 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 13:04:29,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 13:04:29,314 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 13:04:29,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 13:04:29,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 13:04:29,369 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 13:04:29,369 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 13:04:29,369 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_35f8d99d-e612-45e5-9747-0cea966293f6/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 [2018-12-08 13:04:29,376 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-08 13:04:29,388 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-12-08 13:04:29,389 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 13:04:29,390 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 13:04:29,401 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 13:04:29,419 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 13:04:29,419 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2018-12-08 13:04:29,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-12-08 13:04:29,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-12-08 13:04:29,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2018-12-08 13:04:29,419 INFO L87 Difference]: Start difference. First operand 396 states and 926 transitions. Second operand 14 states. [2018-12-08 13:04:29,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 13:04:29,534 INFO L93 Difference]: Finished difference Result 674 states and 1531 transitions. [2018-12-08 13:04:29,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-12-08 13:04:29,534 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 53 [2018-12-08 13:04:29,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 13:04:29,535 INFO L225 Difference]: With dead ends: 674 [2018-12-08 13:04:29,535 INFO L226 Difference]: Without dead ends: 543 [2018-12-08 13:04:29,535 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 [2018-12-08 13:04:29,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2018-12-08 13:04:29,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 543. [2018-12-08 13:04:29,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 543 states. [2018-12-08 13:04:29,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 1220 transitions. [2018-12-08 13:04:29,539 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 1220 transitions. Word has length 53 [2018-12-08 13:04:29,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 13:04:29,539 INFO L480 AbstractCegarLoop]: Abstraction has 543 states and 1220 transitions. [2018-12-08 13:04:29,539 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-12-08 13:04:29,539 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 1220 transitions. [2018-12-08 13:04:29,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-12-08 13:04:29,540 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 13:04:29,540 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] [2018-12-08 13:04:29,540 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 13:04:29,540 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 13:04:29,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1590124650, now seen corresponding path program 13 times [2018-12-08 13:04:29,540 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 13:04:29,540 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 13:04:29,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 13:04:29,541 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 13:04:29,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 13:04:29,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 13:04:29,602 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 13:04:29,602 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 13:04:29,602 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_35f8d99d-e612-45e5-9747-0cea966293f6/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 [2018-12-08 13:04:29,609 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 13:04:29,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 13:04:29,623 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 13:04:29,636 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 13:04:29,651 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 13:04:29,651 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2018-12-08 13:04:29,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-12-08 13:04:29,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-12-08 13:04:29,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2018-12-08 13:04:29,652 INFO L87 Difference]: Start difference. First operand 543 states and 1220 transitions. Second operand 15 states. [2018-12-08 13:04:29,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 13:04:29,778 INFO L93 Difference]: Finished difference Result 690 states and 1563 transitions. [2018-12-08 13:04:29,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-12-08 13:04:29,779 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 57 [2018-12-08 13:04:29,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 13:04:29,779 INFO L225 Difference]: With dead ends: 690 [2018-12-08 13:04:29,780 INFO L226 Difference]: Without dead ends: 559 [2018-12-08 13:04:29,780 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 [2018-12-08 13:04:29,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2018-12-08 13:04:29,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 412. [2018-12-08 13:04:29,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 412 states. [2018-12-08 13:04:29,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 958 transitions. [2018-12-08 13:04:29,783 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 958 transitions. Word has length 57 [2018-12-08 13:04:29,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 13:04:29,783 INFO L480 AbstractCegarLoop]: Abstraction has 412 states and 958 transitions. [2018-12-08 13:04:29,783 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-12-08 13:04:29,783 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 958 transitions. [2018-12-08 13:04:29,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-12-08 13:04:29,784 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 13:04:29,784 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] [2018-12-08 13:04:29,784 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 13:04:29,784 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 13:04:29,784 INFO L82 PathProgramCache]: Analyzing trace with hash 39711850, now seen corresponding path program 14 times [2018-12-08 13:04:29,784 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 13:04:29,784 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 13:04:29,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 13:04:29,785 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 13:04:29,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 13:04:29,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 13:04:29,843 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 13:04:29,843 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 13:04:29,843 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_35f8d99d-e612-45e5-9747-0cea966293f6/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 [2018-12-08 13:04:29,850 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-08 13:04:29,861 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-08 13:04:29,861 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 13:04:29,862 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 13:04:29,877 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 13:04:29,892 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 13:04:29,892 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2018-12-08 13:04:29,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-12-08 13:04:29,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-12-08 13:04:29,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2018-12-08 13:04:29,892 INFO L87 Difference]: Start difference. First operand 412 states and 958 transitions. Second operand 15 states. [2018-12-08 13:04:30,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 13:04:30,027 INFO L93 Difference]: Finished difference Result 706 states and 1595 transitions. [2018-12-08 13:04:30,027 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-12-08 13:04:30,027 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 57 [2018-12-08 13:04:30,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 13:04:30,028 INFO L225 Difference]: With dead ends: 706 [2018-12-08 13:04:30,028 INFO L226 Difference]: Without dead ends: 575 [2018-12-08 13:04:30,029 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 [2018-12-08 13:04:30,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2018-12-08 13:04:30,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 575. [2018-12-08 13:04:30,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 575 states. [2018-12-08 13:04:30,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 1284 transitions. [2018-12-08 13:04:30,034 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 1284 transitions. Word has length 57 [2018-12-08 13:04:30,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 13:04:30,034 INFO L480 AbstractCegarLoop]: Abstraction has 575 states and 1284 transitions. [2018-12-08 13:04:30,034 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-12-08 13:04:30,034 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 1284 transitions. [2018-12-08 13:04:30,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-12-08 13:04:30,035 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 13:04:30,035 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] [2018-12-08 13:04:30,035 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 13:04:30,036 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 13:04:30,036 INFO L82 PathProgramCache]: Analyzing trace with hash -21031161, now seen corresponding path program 15 times [2018-12-08 13:04:30,036 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 13:04:30,036 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 13:04:30,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 13:04:30,037 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 13:04:30,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 13:04:30,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 13:04:30,102 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 60 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 13:04:30,102 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 13:04:30,102 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_35f8d99d-e612-45e5-9747-0cea966293f6/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 [2018-12-08 13:04:30,109 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-08 13:04:30,125 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-12-08 13:04:30,125 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 13:04:30,126 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 13:04:30,142 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 13:04:30,157 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-12-08 13:04:30,157 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 15 [2018-12-08 13:04:30,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-12-08 13:04:30,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-12-08 13:04:30,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2018-12-08 13:04:30,157 INFO L87 Difference]: Start difference. First operand 575 states and 1284 transitions. Second operand 15 states. [2018-12-08 13:04:30,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 13:04:30,252 INFO L93 Difference]: Finished difference Result 1199 states and 2426 transitions. [2018-12-08 13:04:30,252 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-12-08 13:04:30,252 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 61 [2018-12-08 13:04:30,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 13:04:30,253 INFO L225 Difference]: With dead ends: 1199 [2018-12-08 13:04:30,253 INFO L226 Difference]: Without dead ends: 407 [2018-12-08 13:04:30,254 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 [2018-12-08 13:04:30,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2018-12-08 13:04:30,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 407. [2018-12-08 13:04:30,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 407 states. [2018-12-08 13:04:30,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 897 transitions. [2018-12-08 13:04:30,259 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 897 transitions. Word has length 61 [2018-12-08 13:04:30,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 13:04:30,259 INFO L480 AbstractCegarLoop]: Abstraction has 407 states and 897 transitions. [2018-12-08 13:04:30,259 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-12-08 13:04:30,259 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 897 transitions. [2018-12-08 13:04:30,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-12-08 13:04:30,260 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 13:04:30,260 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] [2018-12-08 13:04:30,260 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 13:04:30,260 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 13:04:30,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1418711251, now seen corresponding path program 16 times [2018-12-08 13:04:30,260 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 13:04:30,260 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 13:04:30,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 13:04:30,261 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 13:04:30,262 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 13:04:30,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 13:04:30,332 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 47 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 13:04:30,332 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 13:04:30,332 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_35f8d99d-e612-45e5-9747-0cea966293f6/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 [2018-12-08 13:04:30,340 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-08 13:04:30,351 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-08 13:04:30,351 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 13:04:30,352 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 13:04:30,369 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 13:04:30,384 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-12-08 13:04:30,384 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 15 [2018-12-08 13:04:30,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-12-08 13:04:30,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-12-08 13:04:30,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2018-12-08 13:04:30,385 INFO L87 Difference]: Start difference. First operand 407 states and 897 transitions. Second operand 15 states. [2018-12-08 13:04:30,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 13:04:30,469 INFO L93 Difference]: Finished difference Result 563 states and 1005 transitions. [2018-12-08 13:04:30,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-12-08 13:04:30,469 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 61 [2018-12-08 13:04:30,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 13:04:30,470 INFO L225 Difference]: With dead ends: 563 [2018-12-08 13:04:30,470 INFO L226 Difference]: Without dead ends: 0 [2018-12-08 13:04:30,470 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 [2018-12-08 13:04:30,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-08 13:04:30,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-08 13:04:30,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-08 13:04:30,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-08 13:04:30,471 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 61 [2018-12-08 13:04:30,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 13:04:30,471 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-08 13:04:30,471 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-12-08 13:04:30,471 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-08 13:04:30,471 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-08 13:04:30,473 INFO L305 ceAbstractionStarter]: Did not count any witness invariants because Icfg is not BoogieIcfg [2018-12-08 13:04:30,474 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 08.12 01:04:30 BasicIcfg [2018-12-08 13:04:30,475 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-08 13:04:30,475 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-08 13:04:30,475 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-08 13:04:30,475 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-08 13:04:30,475 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 01:04:25" (3/4) ... [2018-12-08 13:04:30,478 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-12-08 13:04:30,483 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure t1 [2018-12-08 13:04:30,483 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure t2 [2018-12-08 13:04:30,485 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2018-12-08 13:04:30,485 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2018-12-08 13:04:30,485 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-12-08 13:04:30,511 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_35f8d99d-e612-45e5-9747-0cea966293f6/bin-2019/uautomizer/witness.graphml [2018-12-08 13:04:30,511 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-08 13:04:30,511 INFO L168 Benchmark]: Toolchain (without parser) took 5120.12 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 172.0 MB). Free memory was 956.0 MB in the beginning and 1.0 GB in the end (delta: -48.3 MB). Peak memory consumption was 123.7 MB. Max. memory is 11.5 GB. [2018-12-08 13:04:30,512 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 982.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 13:04:30,513 INFO L168 Benchmark]: CACSL2BoogieTranslator took 277.85 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 82.3 MB). Free memory was 956.0 MB in the beginning and 1.1 GB in the end (delta: -104.9 MB). Peak memory consumption was 30.3 MB. Max. memory is 11.5 GB. [2018-12-08 13:04:30,513 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.80 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. [2018-12-08 13:04:30,513 INFO L168 Benchmark]: Boogie Preprocessor took 14.75 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. [2018-12-08 13:04:30,513 INFO L168 Benchmark]: RCFGBuilder took 220.02 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 22.4 MB). Peak memory consumption was 22.4 MB. Max. memory is 11.5 GB. [2018-12-08 13:04:30,513 INFO L168 Benchmark]: TraceAbstraction took 4543.07 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 89.7 MB). Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 34.2 MB). Peak memory consumption was 123.9 MB. Max. memory is 11.5 GB. [2018-12-08 13:04:30,514 INFO L168 Benchmark]: Witness Printer took 35.99 ms. Allocated memory is still 1.2 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 13:04:30,515 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 982.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 277.85 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 82.3 MB). Free memory was 956.0 MB in the beginning and 1.1 GB in the end (delta: -104.9 MB). Peak memory consumption was 30.3 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 25.80 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. * Boogie Preprocessor took 14.75 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 220.02 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 22.4 MB). Peak memory consumption was 22.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 4543.07 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 89.7 MB). Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 34.2 MB). Peak memory consumption was 123.9 MB. Max. memory is 11.5 GB. * Witness Printer took 35.99 ms. Allocated memory is still 1.2 GB. Free memory is still 1.0 GB. There was no memory consumed. 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, 4.4s OverallTime, 22 OverallIterations, 6 TraceHistogramMax, 1.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1339 SDtfs, 4278 SDslu, 5456 SDs, 0 SdLazy, 1062 SolverSat, 471 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1172 GetRequests, 836 SyntacticMatches, 0 SemanticMatches, 336 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 940 ImplicationChecksByTransitivity, 2.0s 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: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.4s 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...