./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/triangular_false-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_f7b162aa-2d5b-4998-b868-a0e04bc8cadb/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_f7b162aa-2d5b-4998-b868-a0e04bc8cadb/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_f7b162aa-2d5b-4998-b868-a0e04bc8cadb/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_f7b162aa-2d5b-4998-b868-a0e04bc8cadb/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/triangular_false-unreach-call.i -s /tmp/vcloud-vcloud-master/worker/working_dir_f7b162aa-2d5b-4998-b868-a0e04bc8cadb/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_f7b162aa-2d5b-4998-b868-a0e04bc8cadb/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 440b8f87b993409470c921154676895cb2b74b47 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.23-635dfa2 [2018-12-02 08:07:42,162 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-02 08:07:42,163 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-02 08:07:42,169 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-02 08:07:42,169 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-02 08:07:42,170 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-02 08:07:42,171 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-02 08:07:42,171 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-02 08:07:42,172 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-02 08:07:42,172 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-02 08:07:42,173 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-02 08:07:42,173 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-02 08:07:42,173 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-02 08:07:42,174 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-02 08:07:42,175 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-02 08:07:42,175 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-02 08:07:42,175 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-02 08:07:42,176 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-02 08:07:42,177 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-02 08:07:42,178 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-02 08:07:42,178 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-02 08:07:42,179 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-02 08:07:42,180 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-02 08:07:42,180 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-02 08:07:42,180 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-02 08:07:42,181 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-02 08:07:42,181 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-02 08:07:42,182 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-02 08:07:42,182 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-02 08:07:42,183 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-02 08:07:42,183 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-02 08:07:42,183 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-02 08:07:42,183 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-02 08:07:42,183 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-02 08:07:42,184 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-02 08:07:42,184 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-02 08:07:42,184 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_f7b162aa-2d5b-4998-b868-a0e04bc8cadb/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-12-02 08:07:42,191 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-02 08:07:42,191 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-02 08:07:42,192 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-02 08:07:42,192 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-02 08:07:42,192 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-02 08:07:42,192 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-02 08:07:42,192 INFO L133 SettingsManager]: * Use SBE=true [2018-12-02 08:07:42,193 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-02 08:07:42,193 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-02 08:07:42,193 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-02 08:07:42,193 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-02 08:07:42,193 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-02 08:07:42,193 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-02 08:07:42,193 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-02 08:07:42,193 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-02 08:07:42,193 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-02 08:07:42,193 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-02 08:07:42,193 INFO L133 SettingsManager]: * Use constant arrays=true [2018-12-02 08:07:42,193 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-02 08:07:42,194 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-02 08:07:42,194 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-02 08:07:42,194 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-02 08:07:42,194 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-02 08:07:42,194 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-02 08:07:42,194 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-02 08:07:42,194 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-02 08:07:42,194 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-02 08:07:42,194 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-12-02 08:07:42,194 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-02 08:07:42,195 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-02 08:07:42,195 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_f7b162aa-2d5b-4998-b868-a0e04bc8cadb/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 -> 440b8f87b993409470c921154676895cb2b74b47 [2018-12-02 08:07:42,213 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-02 08:07:42,222 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-02 08:07:42,225 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-02 08:07:42,226 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-02 08:07:42,226 INFO L276 PluginConnector]: CDTParser initialized [2018-12-02 08:07:42,227 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_f7b162aa-2d5b-4998-b868-a0e04bc8cadb/bin-2019/uautomizer/../../sv-benchmarks/c/pthread/triangular_false-unreach-call.i [2018-12-02 08:07:42,268 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_f7b162aa-2d5b-4998-b868-a0e04bc8cadb/bin-2019/uautomizer/data/af765de9e/44bd7c14d6934a0b9fb2cde3a72f5aae/FLAGd3745963e [2018-12-02 08:07:42,703 INFO L307 CDTParser]: Found 1 translation units. [2018-12-02 08:07:42,704 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_f7b162aa-2d5b-4998-b868-a0e04bc8cadb/sv-benchmarks/c/pthread/triangular_false-unreach-call.i [2018-12-02 08:07:42,710 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_f7b162aa-2d5b-4998-b868-a0e04bc8cadb/bin-2019/uautomizer/data/af765de9e/44bd7c14d6934a0b9fb2cde3a72f5aae/FLAGd3745963e [2018-12-02 08:07:42,720 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_f7b162aa-2d5b-4998-b868-a0e04bc8cadb/bin-2019/uautomizer/data/af765de9e/44bd7c14d6934a0b9fb2cde3a72f5aae [2018-12-02 08:07:42,722 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-02 08:07:42,723 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-02 08:07:42,724 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-02 08:07:42,724 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-02 08:07:42,726 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-02 08:07:42,727 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 08:07:42" (1/1) ... [2018-12-02 08:07:42,729 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c5b6929 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:07:42, skipping insertion in model container [2018-12-02 08:07:42,729 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 08:07:42" (1/1) ... [2018-12-02 08:07:42,733 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-02 08:07:42,757 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-02 08:07:42,934 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-02 08:07:42,949 INFO L191 MainTranslator]: Completed pre-run [2018-12-02 08:07:42,981 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-02 08:07:43,052 INFO L195 MainTranslator]: Completed translation [2018-12-02 08:07:43,052 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:07:43 WrapperNode [2018-12-02 08:07:43,053 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-02 08:07:43,053 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-02 08:07:43,053 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-02 08:07:43,053 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-02 08:07:43,059 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:07:43" (1/1) ... [2018-12-02 08:07:43,067 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:07:43" (1/1) ... [2018-12-02 08:07:43,079 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-02 08:07:43,079 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-02 08:07:43,079 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-02 08:07:43,079 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-02 08:07:43,084 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:07:43" (1/1) ... [2018-12-02 08:07:43,085 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:07:43" (1/1) ... [2018-12-02 08:07:43,086 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:07:43" (1/1) ... [2018-12-02 08:07:43,086 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:07:43" (1/1) ... [2018-12-02 08:07:43,089 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:07:43" (1/1) ... [2018-12-02 08:07:43,091 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:07:43" (1/1) ... [2018-12-02 08:07:43,092 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:07:43" (1/1) ... [2018-12-02 08:07:43,094 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-02 08:07:43,094 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-02 08:07:43,094 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-02 08:07:43,094 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-02 08:07:43,095 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:07:43" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f7b162aa-2d5b-4998-b868-a0e04bc8cadb/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 [2018-12-02 08:07:43,127 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-12-02 08:07:43,127 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2018-12-02 08:07:43,128 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2018-12-02 08:07:43,128 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2018-12-02 08:07:43,128 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2018-12-02 08:07:43,128 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-12-02 08:07:43,128 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2018-12-02 08:07:43,128 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-12-02 08:07:43,128 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2018-12-02 08:07:43,128 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-02 08:07:43,128 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-02 08:07:43,129 WARN L198 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2018-12-02 08:07:43,285 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-02 08:07:43,285 INFO L280 CfgBuilder]: Removed 6 assue(true) statements. [2018-12-02 08:07:43,285 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 08:07:43 BoogieIcfgContainer [2018-12-02 08:07:43,285 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-02 08:07:43,286 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-02 08:07:43,286 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-02 08:07:43,288 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-02 08:07:43,288 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 08:07:42" (1/3) ... [2018-12-02 08:07:43,288 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a381add and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 08:07:43, skipping insertion in model container [2018-12-02 08:07:43,289 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:07:43" (2/3) ... [2018-12-02 08:07:43,289 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a381add and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 08:07:43, skipping insertion in model container [2018-12-02 08:07:43,289 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 08:07:43" (3/3) ... [2018-12-02 08:07:43,290 INFO L112 eAbstractionObserver]: Analyzing ICFG triangular_false-unreach-call.i [2018-12-02 08:07:43,309 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 08:07:43,309 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 08:07:43,309 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 08:07:43,309 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 08:07:43,310 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 08:07:43,310 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 08:07:43,310 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 08:07:43,310 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 08:07:43,310 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 08:07:43,310 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 08:07:43,310 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 08:07:43,311 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 08:07:43,311 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 08:07:43,311 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 08:07:43,311 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 08:07:43,311 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 08:07:43,311 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 08:07:43,311 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 08:07:43,311 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 08:07:43,312 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 08:07:43,312 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 08:07:43,312 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 08:07:43,312 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 08:07:43,312 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 08:07:43,312 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 08:07:43,312 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 08:07:43,312 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 08:07:43,312 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 08:07:43,318 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2018-12-02 08:07:43,318 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-02 08:07:43,323 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-02 08:07:43,332 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-02 08:07:43,346 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-02 08:07:43,347 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-02 08:07:43,347 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-02 08:07:43,347 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-02 08:07:43,347 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-02 08:07:43,347 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-02 08:07:43,347 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-02 08:07:43,347 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-02 08:07:43,347 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-02 08:07:43,352 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 46places, 48 transitions [2018-12-02 08:07:43,382 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 1012 states. [2018-12-02 08:07:43,384 INFO L276 IsEmpty]: Start isEmpty. Operand 1012 states. [2018-12-02 08:07:43,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-12-02 08:07:43,389 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 08:07:43,390 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 08:07:43,391 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 08:07:43,395 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 08:07:43,395 INFO L82 PathProgramCache]: Analyzing trace with hash 573491188, now seen corresponding path program 1 times [2018-12-02 08:07:43,396 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 08:07:43,396 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 08:07:43,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 08:07:43,436 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 08:07:43,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 08:07:43,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 08:07:43,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 08:07:43,543 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 08:07:43,543 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-02 08:07:43,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-02 08:07:43,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-02 08:07:43,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-12-02 08:07:43,555 INFO L87 Difference]: Start difference. First operand 1012 states. Second operand 5 states. [2018-12-02 08:07:43,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 08:07:43,625 INFO L93 Difference]: Finished difference Result 1411 states and 4051 transitions. [2018-12-02 08:07:43,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-02 08:07:43,627 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2018-12-02 08:07:43,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 08:07:43,637 INFO L225 Difference]: With dead ends: 1411 [2018-12-02 08:07:43,637 INFO L226 Difference]: Without dead ends: 322 [2018-12-02 08:07:43,638 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 [2018-12-02 08:07:43,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2018-12-02 08:07:43,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 322. [2018-12-02 08:07:43,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 322 states. [2018-12-02 08:07:43,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 820 transitions. [2018-12-02 08:07:43,673 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 820 transitions. Word has length 19 [2018-12-02 08:07:43,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 08:07:43,674 INFO L480 AbstractCegarLoop]: Abstraction has 322 states and 820 transitions. [2018-12-02 08:07:43,674 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-02 08:07:43,674 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 820 transitions. [2018-12-02 08:07:43,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-12-02 08:07:43,675 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 08:07:43,675 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] [2018-12-02 08:07:43,675 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 08:07:43,675 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 08:07:43,676 INFO L82 PathProgramCache]: Analyzing trace with hash -143811728, now seen corresponding path program 1 times [2018-12-02 08:07:43,676 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 08:07:43,676 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 08:07:43,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 08:07:43,679 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 08:07:43,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 08:07:43,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 08:07:43,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 08:07:43,733 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 08:07:43,734 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-02 08:07:43,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-02 08:07:43,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-02 08:07:43,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-12-02 08:07:43,735 INFO L87 Difference]: Start difference. First operand 322 states and 820 transitions. Second operand 5 states. [2018-12-02 08:07:43,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 08:07:43,760 INFO L93 Difference]: Finished difference Result 411 states and 998 transitions. [2018-12-02 08:07:43,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-02 08:07:43,760 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2018-12-02 08:07:43,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 08:07:43,761 INFO L225 Difference]: With dead ends: 411 [2018-12-02 08:07:43,761 INFO L226 Difference]: Without dead ends: 290 [2018-12-02 08:07:43,762 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 [2018-12-02 08:07:43,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2018-12-02 08:07:43,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 290. [2018-12-02 08:07:43,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 290 states. [2018-12-02 08:07:43,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 714 transitions. [2018-12-02 08:07:43,770 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 714 transitions. Word has length 22 [2018-12-02 08:07:43,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 08:07:43,770 INFO L480 AbstractCegarLoop]: Abstraction has 290 states and 714 transitions. [2018-12-02 08:07:43,770 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-02 08:07:43,770 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 714 transitions. [2018-12-02 08:07:43,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-12-02 08:07:43,770 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 08:07:43,770 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] [2018-12-02 08:07:43,771 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 08:07:43,771 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 08:07:43,771 INFO L82 PathProgramCache]: Analyzing trace with hash 28324926, now seen corresponding path program 1 times [2018-12-02 08:07:43,771 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 08:07:43,771 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 08:07:43,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 08:07:43,773 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 08:07:43,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 08:07:43,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 08:07:43,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 08:07:43,818 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 08:07:43,818 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-12-02 08:07:43,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-02 08:07:43,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-02 08:07:43,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-12-02 08:07:43,819 INFO L87 Difference]: Start difference. First operand 290 states and 714 transitions. Second operand 6 states. [2018-12-02 08:07:43,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 08:07:43,861 INFO L93 Difference]: Finished difference Result 437 states and 1057 transitions. [2018-12-02 08:07:43,862 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-02 08:07:43,862 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2018-12-02 08:07:43,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 08:07:43,863 INFO L225 Difference]: With dead ends: 437 [2018-12-02 08:07:43,864 INFO L226 Difference]: Without dead ends: 309 [2018-12-02 08:07:43,864 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 [2018-12-02 08:07:43,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2018-12-02 08:07:43,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 299. [2018-12-02 08:07:43,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2018-12-02 08:07:43,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 732 transitions. [2018-12-02 08:07:43,874 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 732 transitions. Word has length 25 [2018-12-02 08:07:43,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 08:07:43,875 INFO L480 AbstractCegarLoop]: Abstraction has 299 states and 732 transitions. [2018-12-02 08:07:43,875 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-02 08:07:43,875 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 732 transitions. [2018-12-02 08:07:43,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-12-02 08:07:43,876 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 08:07:43,876 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] [2018-12-02 08:07:43,876 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 08:07:43,876 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 08:07:43,876 INFO L82 PathProgramCache]: Analyzing trace with hash 19387626, now seen corresponding path program 2 times [2018-12-02 08:07:43,876 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 08:07:43,877 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 08:07:43,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 08:07:43,879 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 08:07:43,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 08:07:43,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 08:07:43,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 08:07:43,926 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 08:07:43,926 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-12-02 08:07:43,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-02 08:07:43,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-02 08:07:43,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-12-02 08:07:43,926 INFO L87 Difference]: Start difference. First operand 299 states and 732 transitions. Second operand 6 states. [2018-12-02 08:07:43,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 08:07:43,961 INFO L93 Difference]: Finished difference Result 456 states and 1095 transitions. [2018-12-02 08:07:43,962 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-02 08:07:43,962 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2018-12-02 08:07:43,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 08:07:43,963 INFO L225 Difference]: With dead ends: 456 [2018-12-02 08:07:43,963 INFO L226 Difference]: Without dead ends: 319 [2018-12-02 08:07:43,963 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 [2018-12-02 08:07:43,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2018-12-02 08:07:43,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 319. [2018-12-02 08:07:43,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2018-12-02 08:07:43,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 772 transitions. [2018-12-02 08:07:43,969 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 772 transitions. Word has length 25 [2018-12-02 08:07:43,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 08:07:43,969 INFO L480 AbstractCegarLoop]: Abstraction has 319 states and 772 transitions. [2018-12-02 08:07:43,969 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-02 08:07:43,969 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 772 transitions. [2018-12-02 08:07:43,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-12-02 08:07:43,970 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 08:07:43,970 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] [2018-12-02 08:07:43,970 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 08:07:43,971 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 08:07:43,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1592611961, now seen corresponding path program 1 times [2018-12-02 08:07:43,971 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 08:07:43,971 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 08:07:43,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 08:07:43,973 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 08:07:43,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 08:07:43,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 08:07:44,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 08:07:44,020 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 08:07:44,020 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f7b162aa-2d5b-4998-b868-a0e04bc8cadb/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 [2018-12-02 08:07:44,030 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 08:07:44,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 08:07:44,048 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 08:07:44,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 08:07:44,095 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-02 08:07:44,095 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-12-02 08:07:44,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-02 08:07:44,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-02 08:07:44,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-12-02 08:07:44,096 INFO L87 Difference]: Start difference. First operand 319 states and 772 transitions. Second operand 8 states. [2018-12-02 08:07:44,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 08:07:44,159 INFO L93 Difference]: Finished difference Result 466 states and 1115 transitions. [2018-12-02 08:07:44,159 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-02 08:07:44,159 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2018-12-02 08:07:44,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 08:07:44,160 INFO L225 Difference]: With dead ends: 466 [2018-12-02 08:07:44,160 INFO L226 Difference]: Without dead ends: 335 [2018-12-02 08:07:44,160 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 [2018-12-02 08:07:44,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2018-12-02 08:07:44,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 300. [2018-12-02 08:07:44,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 300 states. [2018-12-02 08:07:44,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 734 transitions. [2018-12-02 08:07:44,166 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 734 transitions. Word has length 29 [2018-12-02 08:07:44,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 08:07:44,166 INFO L480 AbstractCegarLoop]: Abstraction has 300 states and 734 transitions. [2018-12-02 08:07:44,166 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-02 08:07:44,166 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 734 transitions. [2018-12-02 08:07:44,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-12-02 08:07:44,167 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 08:07:44,167 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] [2018-12-02 08:07:44,167 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 08:07:44,167 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 08:07:44,168 INFO L82 PathProgramCache]: Analyzing trace with hash 2035666861, now seen corresponding path program 1 times [2018-12-02 08:07:44,168 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 08:07:44,168 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 08:07:44,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 08:07:44,169 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 08:07:44,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 08:07:44,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 08:07:44,203 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 08:07:44,204 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 08:07:44,204 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f7b162aa-2d5b-4998-b868-a0e04bc8cadb/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 [2018-12-02 08:07:44,211 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 08:07:44,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 08:07:44,224 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 08:07:44,237 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 08:07:44,251 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-02 08:07:44,251 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-12-02 08:07:44,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-02 08:07:44,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-02 08:07:44,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-12-02 08:07:44,252 INFO L87 Difference]: Start difference. First operand 300 states and 734 transitions. Second operand 8 states. [2018-12-02 08:07:44,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 08:07:44,292 INFO L93 Difference]: Finished difference Result 482 states and 1147 transitions. [2018-12-02 08:07:44,292 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-02 08:07:44,292 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2018-12-02 08:07:44,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 08:07:44,293 INFO L225 Difference]: With dead ends: 482 [2018-12-02 08:07:44,293 INFO L226 Difference]: Without dead ends: 351 [2018-12-02 08:07:44,293 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 [2018-12-02 08:07:44,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2018-12-02 08:07:44,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 351. [2018-12-02 08:07:44,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351 states. [2018-12-02 08:07:44,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 836 transitions. [2018-12-02 08:07:44,300 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 836 transitions. Word has length 29 [2018-12-02 08:07:44,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 08:07:44,300 INFO L480 AbstractCegarLoop]: Abstraction has 351 states and 836 transitions. [2018-12-02 08:07:44,300 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-02 08:07:44,300 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 836 transitions. [2018-12-02 08:07:44,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-12-02 08:07:44,301 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 08:07:44,301 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] [2018-12-02 08:07:44,301 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 08:07:44,301 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 08:07:44,302 INFO L82 PathProgramCache]: Analyzing trace with hash -460714038, now seen corresponding path program 1 times [2018-12-02 08:07:44,302 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 08:07:44,302 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 08:07:44,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 08:07:44,303 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 08:07:44,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 08:07:44,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 08:07:44,359 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 08:07:44,359 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 08:07:44,359 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f7b162aa-2d5b-4998-b868-a0e04bc8cadb/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 [2018-12-02 08:07:44,368 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 08:07:44,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 08:07:44,382 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 08:07:44,402 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 08:07:44,416 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-02 08:07:44,416 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2018-12-02 08:07:44,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-02 08:07:44,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-02 08:07:44,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2018-12-02 08:07:44,417 INFO L87 Difference]: Start difference. First operand 351 states and 836 transitions. Second operand 9 states. [2018-12-02 08:07:44,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 08:07:44,514 INFO L93 Difference]: Finished difference Result 498 states and 1179 transitions. [2018-12-02 08:07:44,514 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-02 08:07:44,514 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2018-12-02 08:07:44,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 08:07:44,515 INFO L225 Difference]: With dead ends: 498 [2018-12-02 08:07:44,516 INFO L226 Difference]: Without dead ends: 367 [2018-12-02 08:07:44,516 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2018-12-02 08:07:44,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2018-12-02 08:07:44,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 316. [2018-12-02 08:07:44,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 316 states. [2018-12-02 08:07:44,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 766 transitions. [2018-12-02 08:07:44,521 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 766 transitions. Word has length 33 [2018-12-02 08:07:44,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 08:07:44,521 INFO L480 AbstractCegarLoop]: Abstraction has 316 states and 766 transitions. [2018-12-02 08:07:44,521 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-02 08:07:44,522 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 766 transitions. [2018-12-02 08:07:44,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-12-02 08:07:44,522 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 08:07:44,522 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] [2018-12-02 08:07:44,523 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 08:07:44,523 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 08:07:44,523 INFO L82 PathProgramCache]: Analyzing trace with hash 1110322378, now seen corresponding path program 2 times [2018-12-02 08:07:44,523 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 08:07:44,523 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 08:07:44,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 08:07:44,525 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 08:07:44,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 08:07:44,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 08:07:44,577 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 08:07:44,577 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 08:07:44,578 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f7b162aa-2d5b-4998-b868-a0e04bc8cadb/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 [2018-12-02 08:07:44,584 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-02 08:07:44,594 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-02 08:07:44,594 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 08:07:44,595 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 08:07:44,609 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 08:07:44,623 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-02 08:07:44,623 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2018-12-02 08:07:44,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-02 08:07:44,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-02 08:07:44,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2018-12-02 08:07:44,624 INFO L87 Difference]: Start difference. First operand 316 states and 766 transitions. Second operand 9 states. [2018-12-02 08:07:44,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 08:07:44,690 INFO L93 Difference]: Finished difference Result 514 states and 1211 transitions. [2018-12-02 08:07:44,690 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-02 08:07:44,691 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2018-12-02 08:07:44,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 08:07:44,692 INFO L225 Difference]: With dead ends: 514 [2018-12-02 08:07:44,692 INFO L226 Difference]: Without dead ends: 383 [2018-12-02 08:07:44,692 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 [2018-12-02 08:07:44,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2018-12-02 08:07:44,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 383. [2018-12-02 08:07:44,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 383 states. [2018-12-02 08:07:44,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 900 transitions. [2018-12-02 08:07:44,699 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 900 transitions. Word has length 33 [2018-12-02 08:07:44,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 08:07:44,699 INFO L480 AbstractCegarLoop]: Abstraction has 383 states and 900 transitions. [2018-12-02 08:07:44,699 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-02 08:07:44,700 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 900 transitions. [2018-12-02 08:07:44,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-12-02 08:07:44,700 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 08:07:44,700 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] [2018-12-02 08:07:44,700 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 08:07:44,701 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 08:07:44,701 INFO L82 PathProgramCache]: Analyzing trace with hash 2061178471, now seen corresponding path program 3 times [2018-12-02 08:07:44,701 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 08:07:44,701 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 08:07:44,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 08:07:44,703 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 08:07:44,703 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 08:07:44,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 08:07:44,759 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 08:07:44,759 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 08:07:44,759 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f7b162aa-2d5b-4998-b868-a0e04bc8cadb/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 [2018-12-02 08:07:44,767 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-02 08:07:44,780 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-12-02 08:07:44,780 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 08:07:44,782 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 08:07:44,808 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 08:07:44,823 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-02 08:07:44,823 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2018-12-02 08:07:44,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-02 08:07:44,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-02 08:07:44,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2018-12-02 08:07:44,824 INFO L87 Difference]: Start difference. First operand 383 states and 900 transitions. Second operand 10 states. [2018-12-02 08:07:44,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 08:07:44,898 INFO L93 Difference]: Finished difference Result 530 states and 1243 transitions. [2018-12-02 08:07:44,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-02 08:07:44,899 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2018-12-02 08:07:44,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 08:07:44,900 INFO L225 Difference]: With dead ends: 530 [2018-12-02 08:07:44,900 INFO L226 Difference]: Without dead ends: 399 [2018-12-02 08:07:44,900 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 [2018-12-02 08:07:44,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2018-12-02 08:07:44,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 332. [2018-12-02 08:07:44,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 332 states. [2018-12-02 08:07:44,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 798 transitions. [2018-12-02 08:07:44,907 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 798 transitions. Word has length 37 [2018-12-02 08:07:44,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 08:07:44,907 INFO L480 AbstractCegarLoop]: Abstraction has 332 states and 798 transitions. [2018-12-02 08:07:44,907 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-02 08:07:44,908 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 798 transitions. [2018-12-02 08:07:44,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-12-02 08:07:44,908 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 08:07:44,908 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] [2018-12-02 08:07:44,909 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 08:07:44,909 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 08:07:44,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1649592435, now seen corresponding path program 4 times [2018-12-02 08:07:44,909 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 08:07:44,909 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 08:07:44,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 08:07:44,911 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 08:07:44,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 08:07:44,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 08:07:44,958 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 08:07:44,958 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 08:07:44,958 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f7b162aa-2d5b-4998-b868-a0e04bc8cadb/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 [2018-12-02 08:07:44,965 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-02 08:07:44,977 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-02 08:07:44,977 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 08:07:44,978 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 08:07:45,014 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 08:07:45,029 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-02 08:07:45,029 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2018-12-02 08:07:45,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-02 08:07:45,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-02 08:07:45,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2018-12-02 08:07:45,030 INFO L87 Difference]: Start difference. First operand 332 states and 798 transitions. Second operand 10 states. [2018-12-02 08:07:45,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 08:07:45,085 INFO L93 Difference]: Finished difference Result 546 states and 1275 transitions. [2018-12-02 08:07:45,085 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-02 08:07:45,085 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2018-12-02 08:07:45,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 08:07:45,086 INFO L225 Difference]: With dead ends: 546 [2018-12-02 08:07:45,086 INFO L226 Difference]: Without dead ends: 415 [2018-12-02 08:07:45,087 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 [2018-12-02 08:07:45,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2018-12-02 08:07:45,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 415. [2018-12-02 08:07:45,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 415 states. [2018-12-02 08:07:45,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 964 transitions. [2018-12-02 08:07:45,093 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 964 transitions. Word has length 37 [2018-12-02 08:07:45,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 08:07:45,093 INFO L480 AbstractCegarLoop]: Abstraction has 415 states and 964 transitions. [2018-12-02 08:07:45,094 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-02 08:07:45,094 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 964 transitions. [2018-12-02 08:07:45,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-12-02 08:07:45,094 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 08:07:45,094 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] [2018-12-02 08:07:45,095 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 08:07:45,095 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 08:07:45,095 INFO L82 PathProgramCache]: Analyzing trace with hash 2086800042, now seen corresponding path program 5 times [2018-12-02 08:07:45,095 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 08:07:45,095 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 08:07:45,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 08:07:45,096 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 08:07:45,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 08:07:45,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 08:07:45,154 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 08:07:45,154 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 08:07:45,154 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f7b162aa-2d5b-4998-b868-a0e04bc8cadb/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 [2018-12-02 08:07:45,165 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-02 08:07:45,179 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2018-12-02 08:07:45,179 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 08:07:45,181 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 08:07:45,202 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 08:07:45,227 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-02 08:07:45,227 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2018-12-02 08:07:45,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-02 08:07:45,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-02 08:07:45,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2018-12-02 08:07:45,228 INFO L87 Difference]: Start difference. First operand 415 states and 964 transitions. Second operand 11 states. [2018-12-02 08:07:45,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 08:07:45,327 INFO L93 Difference]: Finished difference Result 562 states and 1307 transitions. [2018-12-02 08:07:45,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-02 08:07:45,327 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2018-12-02 08:07:45,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 08:07:45,328 INFO L225 Difference]: With dead ends: 562 [2018-12-02 08:07:45,329 INFO L226 Difference]: Without dead ends: 431 [2018-12-02 08:07:45,329 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 [2018-12-02 08:07:45,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2018-12-02 08:07:45,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 348. [2018-12-02 08:07:45,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 348 states. [2018-12-02 08:07:45,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 830 transitions. [2018-12-02 08:07:45,333 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 830 transitions. Word has length 41 [2018-12-02 08:07:45,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 08:07:45,333 INFO L480 AbstractCegarLoop]: Abstraction has 348 states and 830 transitions. [2018-12-02 08:07:45,333 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-02 08:07:45,334 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 830 transitions. [2018-12-02 08:07:45,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-12-02 08:07:45,334 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 08:07:45,334 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] [2018-12-02 08:07:45,334 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 08:07:45,334 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 08:07:45,335 INFO L82 PathProgramCache]: Analyzing trace with hash 449750186, now seen corresponding path program 6 times [2018-12-02 08:07:45,335 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 08:07:45,335 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 08:07:45,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 08:07:45,336 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 08:07:45,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 08:07:45,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 08:07:45,393 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 08:07:45,393 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 08:07:45,393 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f7b162aa-2d5b-4998-b868-a0e04bc8cadb/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 [2018-12-02 08:07:45,401 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-02 08:07:45,415 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2018-12-02 08:07:45,415 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 08:07:45,417 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 08:07:45,448 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 08:07:45,463 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-02 08:07:45,464 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2018-12-02 08:07:45,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-02 08:07:45,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-02 08:07:45,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2018-12-02 08:07:45,464 INFO L87 Difference]: Start difference. First operand 348 states and 830 transitions. Second operand 11 states. [2018-12-02 08:07:45,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 08:07:45,559 INFO L93 Difference]: Finished difference Result 578 states and 1339 transitions. [2018-12-02 08:07:45,560 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-02 08:07:45,560 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2018-12-02 08:07:45,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 08:07:45,561 INFO L225 Difference]: With dead ends: 578 [2018-12-02 08:07:45,561 INFO L226 Difference]: Without dead ends: 447 [2018-12-02 08:07:45,561 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 [2018-12-02 08:07:45,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2018-12-02 08:07:45,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 447. [2018-12-02 08:07:45,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 447 states. [2018-12-02 08:07:45,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 1028 transitions. [2018-12-02 08:07:45,565 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 1028 transitions. Word has length 41 [2018-12-02 08:07:45,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 08:07:45,565 INFO L480 AbstractCegarLoop]: Abstraction has 447 states and 1028 transitions. [2018-12-02 08:07:45,565 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-02 08:07:45,565 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 1028 transitions. [2018-12-02 08:07:45,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-12-02 08:07:45,565 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 08:07:45,565 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] [2018-12-02 08:07:45,566 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 08:07:45,566 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 08:07:45,566 INFO L82 PathProgramCache]: Analyzing trace with hash 511353159, now seen corresponding path program 7 times [2018-12-02 08:07:45,566 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 08:07:45,566 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 08:07:45,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 08:07:45,567 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 08:07:45,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 08:07:45,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 08:07:45,611 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 08:07:45,611 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 08:07:45,612 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f7b162aa-2d5b-4998-b868-a0e04bc8cadb/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 [2018-12-02 08:07:45,619 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 08:07:45,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 08:07:45,632 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 08:07:45,646 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 08:07:45,661 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-02 08:07:45,661 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2018-12-02 08:07:45,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-02 08:07:45,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-02 08:07:45,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2018-12-02 08:07:45,662 INFO L87 Difference]: Start difference. First operand 447 states and 1028 transitions. Second operand 12 states. [2018-12-02 08:07:45,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 08:07:45,796 INFO L93 Difference]: Finished difference Result 594 states and 1371 transitions. [2018-12-02 08:07:45,796 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-12-02 08:07:45,796 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 45 [2018-12-02 08:07:45,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 08:07:45,798 INFO L225 Difference]: With dead ends: 594 [2018-12-02 08:07:45,798 INFO L226 Difference]: Without dead ends: 463 [2018-12-02 08:07:45,798 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 [2018-12-02 08:07:45,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2018-12-02 08:07:45,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 364. [2018-12-02 08:07:45,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364 states. [2018-12-02 08:07:45,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 862 transitions. [2018-12-02 08:07:45,806 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 862 transitions. Word has length 45 [2018-12-02 08:07:45,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 08:07:45,806 INFO L480 AbstractCegarLoop]: Abstraction has 364 states and 862 transitions. [2018-12-02 08:07:45,806 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-02 08:07:45,806 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 862 transitions. [2018-12-02 08:07:45,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-12-02 08:07:45,807 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 08:07:45,807 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] [2018-12-02 08:07:45,807 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 08:07:45,807 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 08:07:45,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1081163923, now seen corresponding path program 8 times [2018-12-02 08:07:45,808 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 08:07:45,808 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 08:07:45,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 08:07:45,809 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 08:07:45,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 08:07:45,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 08:07:45,890 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 08:07:45,891 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 08:07:45,891 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f7b162aa-2d5b-4998-b868-a0e04bc8cadb/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 [2018-12-02 08:07:45,899 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-02 08:07:45,914 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-02 08:07:45,914 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 08:07:45,916 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 08:07:45,950 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 08:07:45,969 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-02 08:07:45,969 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2018-12-02 08:07:45,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-02 08:07:45,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-02 08:07:45,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2018-12-02 08:07:45,970 INFO L87 Difference]: Start difference. First operand 364 states and 862 transitions. Second operand 12 states. [2018-12-02 08:07:46,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 08:07:46,079 INFO L93 Difference]: Finished difference Result 610 states and 1403 transitions. [2018-12-02 08:07:46,079 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-12-02 08:07:46,079 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 45 [2018-12-02 08:07:46,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 08:07:46,080 INFO L225 Difference]: With dead ends: 610 [2018-12-02 08:07:46,080 INFO L226 Difference]: Without dead ends: 479 [2018-12-02 08:07:46,080 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 [2018-12-02 08:07:46,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2018-12-02 08:07:46,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 479. [2018-12-02 08:07:46,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 479 states. [2018-12-02 08:07:46,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 1092 transitions. [2018-12-02 08:07:46,085 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 1092 transitions. Word has length 45 [2018-12-02 08:07:46,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 08:07:46,085 INFO L480 AbstractCegarLoop]: Abstraction has 479 states and 1092 transitions. [2018-12-02 08:07:46,085 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-02 08:07:46,085 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 1092 transitions. [2018-12-02 08:07:46,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-12-02 08:07:46,085 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 08:07:46,085 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] [2018-12-02 08:07:46,085 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 08:07:46,086 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 08:07:46,086 INFO L82 PathProgramCache]: Analyzing trace with hash -578738806, now seen corresponding path program 9 times [2018-12-02 08:07:46,086 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 08:07:46,086 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 08:07:46,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 08:07:46,087 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 08:07:46,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 08:07:46,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 08:07:46,154 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 08:07:46,154 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 08:07:46,154 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f7b162aa-2d5b-4998-b868-a0e04bc8cadb/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 [2018-12-02 08:07:46,161 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-02 08:07:46,174 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-12-02 08:07:46,174 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 08:07:46,175 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 08:07:46,189 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 08:07:46,204 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-02 08:07:46,204 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2018-12-02 08:07:46,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-12-02 08:07:46,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-12-02 08:07:46,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2018-12-02 08:07:46,205 INFO L87 Difference]: Start difference. First operand 479 states and 1092 transitions. Second operand 13 states. [2018-12-02 08:07:46,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 08:07:46,329 INFO L93 Difference]: Finished difference Result 626 states and 1435 transitions. [2018-12-02 08:07:46,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-12-02 08:07:46,329 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2018-12-02 08:07:46,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 08:07:46,331 INFO L225 Difference]: With dead ends: 626 [2018-12-02 08:07:46,331 INFO L226 Difference]: Without dead ends: 495 [2018-12-02 08:07:46,331 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 [2018-12-02 08:07:46,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2018-12-02 08:07:46,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 380. [2018-12-02 08:07:46,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 380 states. [2018-12-02 08:07:46,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 894 transitions. [2018-12-02 08:07:46,337 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 894 transitions. Word has length 49 [2018-12-02 08:07:46,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 08:07:46,337 INFO L480 AbstractCegarLoop]: Abstraction has 380 states and 894 transitions. [2018-12-02 08:07:46,337 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-12-02 08:07:46,337 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 894 transitions. [2018-12-02 08:07:46,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-12-02 08:07:46,338 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 08:07:46,338 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] [2018-12-02 08:07:46,338 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 08:07:46,338 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 08:07:46,338 INFO L82 PathProgramCache]: Analyzing trace with hash -555139958, now seen corresponding path program 10 times [2018-12-02 08:07:46,339 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 08:07:46,339 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 08:07:46,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 08:07:46,340 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 08:07:46,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 08:07:46,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 08:07:46,395 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 08:07:46,395 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 08:07:46,395 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f7b162aa-2d5b-4998-b868-a0e04bc8cadb/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 [2018-12-02 08:07:46,402 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-02 08:07:46,413 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-02 08:07:46,413 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 08:07:46,414 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 08:07:46,427 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 08:07:46,442 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-02 08:07:46,442 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2018-12-02 08:07:46,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-12-02 08:07:46,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-12-02 08:07:46,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2018-12-02 08:07:46,442 INFO L87 Difference]: Start difference. First operand 380 states and 894 transitions. Second operand 13 states. [2018-12-02 08:07:46,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 08:07:46,554 INFO L93 Difference]: Finished difference Result 642 states and 1467 transitions. [2018-12-02 08:07:46,554 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-12-02 08:07:46,554 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2018-12-02 08:07:46,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 08:07:46,555 INFO L225 Difference]: With dead ends: 642 [2018-12-02 08:07:46,555 INFO L226 Difference]: Without dead ends: 511 [2018-12-02 08:07:46,556 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 [2018-12-02 08:07:46,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2018-12-02 08:07:46,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 511. [2018-12-02 08:07:46,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 511 states. [2018-12-02 08:07:46,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 1156 transitions. [2018-12-02 08:07:46,561 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 1156 transitions. Word has length 49 [2018-12-02 08:07:46,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 08:07:46,562 INFO L480 AbstractCegarLoop]: Abstraction has 511 states and 1156 transitions. [2018-12-02 08:07:46,562 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-12-02 08:07:46,562 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 1156 transitions. [2018-12-02 08:07:46,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-12-02 08:07:46,562 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 08:07:46,562 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] [2018-12-02 08:07:46,562 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 08:07:46,563 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 08:07:46,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1389448231, now seen corresponding path program 11 times [2018-12-02 08:07:46,563 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 08:07:46,563 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 08:07:46,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 08:07:46,564 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 08:07:46,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 08:07:46,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 08:07:46,619 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 08:07:46,619 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 08:07:46,619 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f7b162aa-2d5b-4998-b868-a0e04bc8cadb/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 [2018-12-02 08:07:46,626 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-02 08:07:46,637 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2018-12-02 08:07:46,637 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 08:07:46,638 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 08:07:46,655 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 08:07:46,670 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-02 08:07:46,670 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2018-12-02 08:07:46,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-12-02 08:07:46,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-12-02 08:07:46,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2018-12-02 08:07:46,671 INFO L87 Difference]: Start difference. First operand 511 states and 1156 transitions. Second operand 14 states. [2018-12-02 08:07:46,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 08:07:46,780 INFO L93 Difference]: Finished difference Result 658 states and 1499 transitions. [2018-12-02 08:07:46,780 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-12-02 08:07:46,780 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 53 [2018-12-02 08:07:46,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 08:07:46,781 INFO L225 Difference]: With dead ends: 658 [2018-12-02 08:07:46,781 INFO L226 Difference]: Without dead ends: 527 [2018-12-02 08:07:46,782 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 [2018-12-02 08:07:46,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2018-12-02 08:07:46,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 396. [2018-12-02 08:07:46,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 396 states. [2018-12-02 08:07:46,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 926 transitions. [2018-12-02 08:07:46,786 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 926 transitions. Word has length 53 [2018-12-02 08:07:46,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 08:07:46,786 INFO L480 AbstractCegarLoop]: Abstraction has 396 states and 926 transitions. [2018-12-02 08:07:46,786 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-12-02 08:07:46,786 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 926 transitions. [2018-12-02 08:07:46,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-12-02 08:07:46,786 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 08:07:46,786 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] [2018-12-02 08:07:46,787 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 08:07:46,787 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 08:07:46,787 INFO L82 PathProgramCache]: Analyzing trace with hash 1121609549, now seen corresponding path program 12 times [2018-12-02 08:07:46,787 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 08:07:46,787 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 08:07:46,788 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 08:07:46,788 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 08:07:46,788 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 08:07:46,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 08:07:46,851 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 08:07:46,851 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 08:07:46,851 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f7b162aa-2d5b-4998-b868-a0e04bc8cadb/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 [2018-12-02 08:07:46,858 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-02 08:07:46,871 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-12-02 08:07:46,871 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 08:07:46,872 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 08:07:46,887 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 08:07:46,902 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-02 08:07:46,902 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2018-12-02 08:07:46,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-12-02 08:07:46,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-12-02 08:07:46,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2018-12-02 08:07:46,902 INFO L87 Difference]: Start difference. First operand 396 states and 926 transitions. Second operand 14 states. [2018-12-02 08:07:47,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 08:07:47,023 INFO L93 Difference]: Finished difference Result 674 states and 1531 transitions. [2018-12-02 08:07:47,023 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-12-02 08:07:47,023 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 53 [2018-12-02 08:07:47,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 08:07:47,024 INFO L225 Difference]: With dead ends: 674 [2018-12-02 08:07:47,024 INFO L226 Difference]: Without dead ends: 543 [2018-12-02 08:07:47,024 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 [2018-12-02 08:07:47,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2018-12-02 08:07:47,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 543. [2018-12-02 08:07:47,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 543 states. [2018-12-02 08:07:47,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 1220 transitions. [2018-12-02 08:07:47,028 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 1220 transitions. Word has length 53 [2018-12-02 08:07:47,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 08:07:47,028 INFO L480 AbstractCegarLoop]: Abstraction has 543 states and 1220 transitions. [2018-12-02 08:07:47,028 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-12-02 08:07:47,028 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 1220 transitions. [2018-12-02 08:07:47,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-12-02 08:07:47,029 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 08:07:47,029 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] [2018-12-02 08:07:47,029 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 08:07:47,029 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 08:07:47,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1590124650, now seen corresponding path program 13 times [2018-12-02 08:07:47,029 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 08:07:47,029 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 08:07:47,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 08:07:47,030 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 08:07:47,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 08:07:47,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 08:07:47,094 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 08:07:47,094 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 08:07:47,095 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f7b162aa-2d5b-4998-b868-a0e04bc8cadb/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 [2018-12-02 08:07:47,101 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 08:07:47,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 08:07:47,115 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 08:07:47,130 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 08:07:47,145 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-02 08:07:47,145 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2018-12-02 08:07:47,145 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-12-02 08:07:47,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-12-02 08:07:47,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2018-12-02 08:07:47,146 INFO L87 Difference]: Start difference. First operand 543 states and 1220 transitions. Second operand 15 states. [2018-12-02 08:07:47,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 08:07:47,285 INFO L93 Difference]: Finished difference Result 690 states and 1563 transitions. [2018-12-02 08:07:47,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-12-02 08:07:47,285 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 57 [2018-12-02 08:07:47,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 08:07:47,286 INFO L225 Difference]: With dead ends: 690 [2018-12-02 08:07:47,286 INFO L226 Difference]: Without dead ends: 559 [2018-12-02 08:07:47,286 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 [2018-12-02 08:07:47,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2018-12-02 08:07:47,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 412. [2018-12-02 08:07:47,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 412 states. [2018-12-02 08:07:47,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 958 transitions. [2018-12-02 08:07:47,290 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 958 transitions. Word has length 57 [2018-12-02 08:07:47,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 08:07:47,290 INFO L480 AbstractCegarLoop]: Abstraction has 412 states and 958 transitions. [2018-12-02 08:07:47,290 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-12-02 08:07:47,290 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 958 transitions. [2018-12-02 08:07:47,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-12-02 08:07:47,290 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 08:07:47,290 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] [2018-12-02 08:07:47,290 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 08:07:47,291 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 08:07:47,291 INFO L82 PathProgramCache]: Analyzing trace with hash 39711850, now seen corresponding path program 14 times [2018-12-02 08:07:47,291 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 08:07:47,291 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 08:07:47,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 08:07:47,291 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 08:07:47,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 08:07:47,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 08:07:47,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 08:07:47,319 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-12-02 08:07:47,350 INFO L305 ceAbstractionStarter]: Did not count any witness invariants because Icfg is not BoogieIcfg [2018-12-02 08:07:47,351 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 08:07:47 BasicIcfg [2018-12-02 08:07:47,351 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-02 08:07:47,351 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-02 08:07:47,351 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-02 08:07:47,351 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-02 08:07:47,351 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 08:07:43" (3/4) ... [2018-12-02 08:07:47,353 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-12-02 08:07:47,390 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_f7b162aa-2d5b-4998-b868-a0e04bc8cadb/bin-2019/uautomizer/witness.graphml [2018-12-02 08:07:47,391 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-02 08:07:47,391 INFO L168 Benchmark]: Toolchain (without parser) took 4668.36 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 194.0 MB). Free memory was 950.6 MB in the beginning and 1.1 GB in the end (delta: -148.3 MB). Peak memory consumption was 45.7 MB. Max. memory is 11.5 GB. [2018-12-02 08:07:47,392 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 976.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 08:07:47,392 INFO L168 Benchmark]: CACSL2BoogieTranslator took 328.44 ms. Allocated memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 1.0 MB). Free memory was 950.6 MB in the beginning and 1.0 GB in the end (delta: -54.0 MB). Peak memory consumption was 28.3 MB. Max. memory is 11.5 GB. [2018-12-02 08:07:47,392 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.73 ms. Allocated memory is still 1.0 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-12-02 08:07:47,392 INFO L168 Benchmark]: Boogie Preprocessor took 14.86 ms. Allocated memory is still 1.0 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 08:07:47,393 INFO L168 Benchmark]: RCFGBuilder took 191.30 ms. Allocated memory is still 1.0 GB. Free memory was 1.0 GB in the beginning and 980.5 MB in the end (delta: 21.5 MB). Peak memory consumption was 21.5 MB. Max. memory is 11.5 GB. [2018-12-02 08:07:47,393 INFO L168 Benchmark]: TraceAbstraction took 4065.12 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 192.9 MB). Free memory was 980.5 MB in the beginning and 1.1 GB in the end (delta: -137.1 MB). Peak memory consumption was 55.9 MB. Max. memory is 11.5 GB. [2018-12-02 08:07:47,393 INFO L168 Benchmark]: Witness Printer took 39.61 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 11.5 GB. [2018-12-02 08:07:47,394 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 976.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 328.44 ms. Allocated memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 1.0 MB). Free memory was 950.6 MB in the beginning and 1.0 GB in the end (delta: -54.0 MB). Peak memory consumption was 28.3 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 25.73 ms. Allocated memory is still 1.0 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 14.86 ms. Allocated memory is still 1.0 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 191.30 ms. Allocated memory is still 1.0 GB. Free memory was 1.0 GB in the beginning and 980.5 MB in the end (delta: 21.5 MB). Peak memory consumption was 21.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 4065.12 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 192.9 MB). Free memory was 980.5 MB in the beginning and 1.1 GB in the end (delta: -137.1 MB). Peak memory consumption was 55.9 MB. Max. memory is 11.5 GB. * Witness Printer took 39.61 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 688]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L660] -1 int i = 3, j = 6; VAL [i=3, j=6] [L678] -1 pthread_t id1, id2; VAL [i=3, j=6] [L679] FCALL, FORK -1 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arg={0:0}, i=3, j=6] [L662] 0 int k = 0; VAL [arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L680] FCALL, FORK -1 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L670] 1 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0, k=0] [L662] COND TRUE 0 k < 5 [L664] 0 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0, k=0] [L670] COND TRUE 1 k < 5 [L672] 1 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=0, k=0] [L670] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=0] [L662] 0 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=1] [L662] COND TRUE 0 k < 5 [L664] 0 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=1, k=1] [L670] COND TRUE 1 k < 5 [L672] 1 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=1, k=1] [L670] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=1, k=2] [L662] 0 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=2] [L662] COND TRUE 0 k < 5 [L664] 0 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=2, k=2] [L670] COND TRUE 1 k < 5 [L672] 1 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=2, k=2] [L670] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=2] [L662] 0 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=3] [L662] COND TRUE 0 k < 5 [L664] 0 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=3, k=3] [L670] COND TRUE 1 k < 5 [L672] 1 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=3, k=3] [L670] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=3] [L662] 0 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=4] [L662] COND TRUE 0 k < 5 [L664] 0 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=4, k=4] [L670] COND TRUE 1 k < 5 [L672] 1 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=4, k=4] [L682] -1 int condI = i >= (2*5 +6); [L685] -1 int condJ = j >= (2*5 +6); VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=4, k=4] [L687] COND TRUE -1 condI || condJ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=4, k=4] [L688] -1 __VERIFIER_error() VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=4, k=4] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 64 locations, 1 error locations. UNSAFE Result, 4.0s OverallTime, 20 OverallIterations, 5 TraceHistogramMax, 1.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1038 SDtfs, 3615 SDslu, 4258 SDs, 0 SdLazy, 854 SolverSat, 411 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 905 GetRequests, 639 SyntacticMatches, 0 SemanticMatches, 266 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 687 ImplicationChecksByTransitivity, 1.7s 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, 19 MinimizatonAttempts, 738 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 1410 NumberOfCodeBlocks, 1410 NumberOfCodeBlocksAsserted, 56 NumberOfCheckSat, 1319 ConstructedInterpolants, 0 QuantifiedInterpolants, 167867 SizeOfPredicates, 139 NumberOfNonLiveVariables, 1682 ConjunctsInSsa, 187 ConjunctsInUnsatCore, 34 InterpolantComputations, 4 PerfectInterpolantSequences, 0/576 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...