./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/triangular-longest_true-unreach-call.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aa418289 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_d2376629-fbcd-464c-9034-4bb2cd81db7d/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_d2376629-fbcd-464c-9034-4bb2cd81db7d/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_d2376629-fbcd-464c-9034-4bb2cd81db7d/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_d2376629-fbcd-464c-9034-4bb2cd81db7d/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/triangular-longest_true-unreach-call.i -s /tmp/vcloud-vcloud-master/worker/working_dir_d2376629-fbcd-464c-9034-4bb2cd81db7d/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_d2376629-fbcd-464c-9034-4bb2cd81db7d/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 b2c24b72038b46d201b1011ce763d9f0fb09353d ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-aa41828 [2018-11-22 22:31:00,638 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-22 22:31:00,640 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-22 22:31:00,647 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-22 22:31:00,648 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-22 22:31:00,648 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-22 22:31:00,649 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-22 22:31:00,651 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-22 22:31:00,652 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-22 22:31:00,652 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-22 22:31:00,653 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-22 22:31:00,653 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-22 22:31:00,654 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-22 22:31:00,654 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-22 22:31:00,655 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-22 22:31:00,656 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-22 22:31:00,656 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-22 22:31:00,657 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-22 22:31:00,659 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-22 22:31:00,660 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-22 22:31:00,661 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-22 22:31:00,662 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-22 22:31:00,663 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-22 22:31:00,663 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-22 22:31:00,664 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-22 22:31:00,664 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-22 22:31:00,665 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-22 22:31:00,666 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-22 22:31:00,666 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-22 22:31:00,667 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-22 22:31:00,667 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-22 22:31:00,668 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-22 22:31:00,668 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-22 22:31:00,668 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-22 22:31:00,669 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-22 22:31:00,669 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-22 22:31:00,670 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_d2376629-fbcd-464c-9034-4bb2cd81db7d/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-11-22 22:31:00,679 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-22 22:31:00,680 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-22 22:31:00,680 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-22 22:31:00,680 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-11-22 22:31:00,681 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-22 22:31:00,681 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-22 22:31:00,681 INFO L133 SettingsManager]: * Use SBE=true [2018-11-22 22:31:00,681 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-22 22:31:00,681 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-22 22:31:00,681 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-22 22:31:00,681 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-22 22:31:00,682 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-22 22:31:00,682 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-22 22:31:00,682 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-22 22:31:00,682 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-22 22:31:00,682 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-22 22:31:00,682 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-22 22:31:00,682 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-22 22:31:00,682 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-22 22:31:00,683 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-22 22:31:00,683 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-22 22:31:00,683 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-22 22:31:00,683 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-22 22:31:00,683 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-22 22:31:00,683 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-22 22:31:00,683 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-22 22:31:00,684 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-22 22:31:00,684 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-22 22:31:00,684 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-22 22:31:00,684 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-22 22:31:00,684 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_d2376629-fbcd-464c-9034-4bb2cd81db7d/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 -> b2c24b72038b46d201b1011ce763d9f0fb09353d [2018-11-22 22:31:00,707 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-22 22:31:00,716 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-22 22:31:00,719 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-22 22:31:00,720 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-22 22:31:00,720 INFO L276 PluginConnector]: CDTParser initialized [2018-11-22 22:31:00,721 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_d2376629-fbcd-464c-9034-4bb2cd81db7d/bin-2019/uautomizer/../../sv-benchmarks/c/pthread/triangular-longest_true-unreach-call.i [2018-11-22 22:31:00,756 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_d2376629-fbcd-464c-9034-4bb2cd81db7d/bin-2019/uautomizer/data/11230d403/2f0f71ab6a1349448c1c5886c74193dc/FLAG05683f1ff [2018-11-22 22:31:01,196 INFO L307 CDTParser]: Found 1 translation units. [2018-11-22 22:31:01,197 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_d2376629-fbcd-464c-9034-4bb2cd81db7d/sv-benchmarks/c/pthread/triangular-longest_true-unreach-call.i [2018-11-22 22:31:01,207 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_d2376629-fbcd-464c-9034-4bb2cd81db7d/bin-2019/uautomizer/data/11230d403/2f0f71ab6a1349448c1c5886c74193dc/FLAG05683f1ff [2018-11-22 22:31:01,216 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_d2376629-fbcd-464c-9034-4bb2cd81db7d/bin-2019/uautomizer/data/11230d403/2f0f71ab6a1349448c1c5886c74193dc [2018-11-22 22:31:01,218 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-22 22:31:01,218 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-22 22:31:01,219 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-22 22:31:01,219 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-22 22:31:01,221 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-22 22:31:01,221 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 10:31:01" (1/1) ... [2018-11-22 22:31:01,223 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a7ad327 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:31:01, skipping insertion in model container [2018-11-22 22:31:01,223 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 10:31:01" (1/1) ... [2018-11-22 22:31:01,229 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-22 22:31:01,255 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-22 22:31:01,444 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-22 22:31:01,449 INFO L191 MainTranslator]: Completed pre-run [2018-11-22 22:31:01,519 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-22 22:31:01,555 INFO L195 MainTranslator]: Completed translation [2018-11-22 22:31:01,555 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:31:01 WrapperNode [2018-11-22 22:31:01,555 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-22 22:31:01,555 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-22 22:31:01,556 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-22 22:31:01,556 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-22 22:31:01,560 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:31:01" (1/1) ... [2018-11-22 22:31:01,569 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:31:01" (1/1) ... [2018-11-22 22:31:01,581 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-22 22:31:01,581 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-22 22:31:01,581 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-22 22:31:01,581 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-22 22:31:01,586 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:31:01" (1/1) ... [2018-11-22 22:31:01,586 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:31:01" (1/1) ... [2018-11-22 22:31:01,588 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:31:01" (1/1) ... [2018-11-22 22:31:01,588 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:31:01" (1/1) ... [2018-11-22 22:31:01,591 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:31:01" (1/1) ... [2018-11-22 22:31:01,594 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:31:01" (1/1) ... [2018-11-22 22:31:01,595 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:31:01" (1/1) ... [2018-11-22 22:31:01,596 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-22 22:31:01,597 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-22 22:31:01,597 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-22 22:31:01,597 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-22 22:31:01,597 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:31:01" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d2376629-fbcd-464c-9034-4bb2cd81db7d/bin-2019/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-22 22:31:01,634 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-11-22 22:31:01,634 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2018-11-22 22:31:01,635 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2018-11-22 22:31:01,635 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2018-11-22 22:31:01,635 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2018-11-22 22:31:01,635 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-11-22 22:31:01,635 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2018-11-22 22:31:01,635 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-11-22 22:31:01,635 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2018-11-22 22:31:01,635 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-22 22:31:01,636 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-22 22:31:01,636 WARN L198 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2018-11-22 22:31:01,864 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-22 22:31:01,864 INFO L280 CfgBuilder]: Removed 6 assue(true) statements. [2018-11-22 22:31:01,864 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 10:31:01 BoogieIcfgContainer [2018-11-22 22:31:01,864 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-22 22:31:01,865 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-22 22:31:01,865 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-22 22:31:01,867 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-22 22:31:01,867 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 10:31:01" (1/3) ... [2018-11-22 22:31:01,867 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fb29482 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 10:31:01, skipping insertion in model container [2018-11-22 22:31:01,867 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:31:01" (2/3) ... [2018-11-22 22:31:01,868 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fb29482 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 10:31:01, skipping insertion in model container [2018-11-22 22:31:01,868 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 10:31:01" (3/3) ... [2018-11-22 22:31:01,869 INFO L112 eAbstractionObserver]: Analyzing ICFG triangular-longest_true-unreach-call.i [2018-11-22 22:31:01,891 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-22 22:31:01,891 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-22 22:31:01,891 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-22 22:31:01,891 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-22 22:31:01,892 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-22 22:31:01,892 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-22 22:31:01,892 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-22 22:31:01,892 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-22 22:31:01,892 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-22 22:31:01,892 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-22 22:31:01,892 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-22 22:31:01,893 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-22 22:31:01,893 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-22 22:31:01,893 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-22 22:31:01,893 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-22 22:31:01,893 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-22 22:31:01,893 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-22 22:31:01,893 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-22 22:31:01,894 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-22 22:31:01,894 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-22 22:31:01,894 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-22 22:31:01,894 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-22 22:31:01,894 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-22 22:31:01,894 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-22 22:31:01,894 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-22 22:31:01,895 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-22 22:31:01,895 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-22 22:31:01,895 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-22 22:31:01,899 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2018-11-22 22:31:01,899 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-22 22:31:01,905 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-22 22:31:01,914 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-22 22:31:01,928 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-22 22:31:01,928 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-22 22:31:01,928 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-22 22:31:01,928 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-22 22:31:01,929 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-22 22:31:01,929 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-22 22:31:01,929 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-22 22:31:01,929 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-22 22:31:01,929 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-22 22:31:01,935 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 46places, 48 transitions [2018-11-22 22:31:01,975 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 1012 states. [2018-11-22 22:31:01,977 INFO L276 IsEmpty]: Start isEmpty. Operand 1012 states. [2018-11-22 22:31:01,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-11-22 22:31:01,983 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:31:01,984 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 22:31:01,986 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:31:01,989 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:31:01,989 INFO L82 PathProgramCache]: Analyzing trace with hash 573491188, now seen corresponding path program 1 times [2018-11-22 22:31:01,991 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:31:01,991 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:31:02,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:02,029 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 22:31:02,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:02,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:31:02,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:02,163 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-22 22:31:02,163 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-22 22:31:02,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-22 22:31:02,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-22 22:31:02,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-11-22 22:31:02,181 INFO L87 Difference]: Start difference. First operand 1012 states. Second operand 5 states. [2018-11-22 22:31:02,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:31:02,282 INFO L93 Difference]: Finished difference Result 1411 states and 4051 transitions. [2018-11-22 22:31:02,283 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-22 22:31:02,284 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2018-11-22 22:31:02,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:31:02,295 INFO L225 Difference]: With dead ends: 1411 [2018-11-22 22:31:02,295 INFO L226 Difference]: Without dead ends: 322 [2018-11-22 22:31:02,296 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-11-22 22:31:02,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2018-11-22 22:31:02,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 322. [2018-11-22 22:31:02,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 322 states. [2018-11-22 22:31:02,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 820 transitions. [2018-11-22 22:31:02,337 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 820 transitions. Word has length 19 [2018-11-22 22:31:02,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:31:02,337 INFO L480 AbstractCegarLoop]: Abstraction has 322 states and 820 transitions. [2018-11-22 22:31:02,337 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-22 22:31:02,337 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 820 transitions. [2018-11-22 22:31:02,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-11-22 22:31:02,338 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:31:02,338 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 22:31:02,339 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:31:02,339 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:31:02,339 INFO L82 PathProgramCache]: Analyzing trace with hash -143811728, now seen corresponding path program 1 times [2018-11-22 22:31:02,339 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:31:02,339 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:31:02,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:02,343 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 22:31:02,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:02,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:31:02,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:02,411 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-22 22:31:02,411 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-22 22:31:02,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-22 22:31:02,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-22 22:31:02,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-11-22 22:31:02,413 INFO L87 Difference]: Start difference. First operand 322 states and 820 transitions. Second operand 5 states. [2018-11-22 22:31:02,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:31:02,449 INFO L93 Difference]: Finished difference Result 411 states and 998 transitions. [2018-11-22 22:31:02,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-22 22:31:02,451 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2018-11-22 22:31:02,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:31:02,453 INFO L225 Difference]: With dead ends: 411 [2018-11-22 22:31:02,453 INFO L226 Difference]: Without dead ends: 290 [2018-11-22 22:31:02,453 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-11-22 22:31:02,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2018-11-22 22:31:02,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 290. [2018-11-22 22:31:02,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 290 states. [2018-11-22 22:31:02,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 714 transitions. [2018-11-22 22:31:02,466 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 714 transitions. Word has length 22 [2018-11-22 22:31:02,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:31:02,467 INFO L480 AbstractCegarLoop]: Abstraction has 290 states and 714 transitions. [2018-11-22 22:31:02,467 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-22 22:31:02,467 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 714 transitions. [2018-11-22 22:31:02,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-11-22 22:31:02,467 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:31:02,467 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 22:31:02,468 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:31:02,468 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:31:02,468 INFO L82 PathProgramCache]: Analyzing trace with hash 28324926, now seen corresponding path program 1 times [2018-11-22 22:31:02,468 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:31:02,468 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:31:02,471 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:02,471 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 22:31:02,471 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:02,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:31:02,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:02,538 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-22 22:31:02,538 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-22 22:31:02,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-22 22:31:02,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-22 22:31:02,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-11-22 22:31:02,539 INFO L87 Difference]: Start difference. First operand 290 states and 714 transitions. Second operand 6 states. [2018-11-22 22:31:02,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:31:02,592 INFO L93 Difference]: Finished difference Result 437 states and 1057 transitions. [2018-11-22 22:31:02,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-22 22:31:02,593 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2018-11-22 22:31:02,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:31:02,594 INFO L225 Difference]: With dead ends: 437 [2018-11-22 22:31:02,594 INFO L226 Difference]: Without dead ends: 309 [2018-11-22 22:31:02,594 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-11-22 22:31:02,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2018-11-22 22:31:02,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 299. [2018-11-22 22:31:02,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2018-11-22 22:31:02,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 732 transitions. [2018-11-22 22:31:02,603 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 732 transitions. Word has length 25 [2018-11-22 22:31:02,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:31:02,603 INFO L480 AbstractCegarLoop]: Abstraction has 299 states and 732 transitions. [2018-11-22 22:31:02,603 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-22 22:31:02,603 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 732 transitions. [2018-11-22 22:31:02,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-11-22 22:31:02,604 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:31:02,604 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 22:31:02,604 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:31:02,604 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:31:02,604 INFO L82 PathProgramCache]: Analyzing trace with hash 19387626, now seen corresponding path program 2 times [2018-11-22 22:31:02,605 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:31:02,605 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:31:02,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:02,608 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 22:31:02,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:02,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:31:02,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:02,669 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-22 22:31:02,669 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-22 22:31:02,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-22 22:31:02,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-22 22:31:02,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-11-22 22:31:02,670 INFO L87 Difference]: Start difference. First operand 299 states and 732 transitions. Second operand 6 states. [2018-11-22 22:31:02,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:31:02,706 INFO L93 Difference]: Finished difference Result 456 states and 1095 transitions. [2018-11-22 22:31:02,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-22 22:31:02,707 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2018-11-22 22:31:02,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:31:02,708 INFO L225 Difference]: With dead ends: 456 [2018-11-22 22:31:02,708 INFO L226 Difference]: Without dead ends: 319 [2018-11-22 22:31:02,708 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-11-22 22:31:02,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2018-11-22 22:31:02,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 319. [2018-11-22 22:31:02,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2018-11-22 22:31:02,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 772 transitions. [2018-11-22 22:31:02,715 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 772 transitions. Word has length 25 [2018-11-22 22:31:02,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:31:02,715 INFO L480 AbstractCegarLoop]: Abstraction has 319 states and 772 transitions. [2018-11-22 22:31:02,715 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-22 22:31:02,715 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 772 transitions. [2018-11-22 22:31:02,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-11-22 22:31:02,716 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:31:02,717 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 22:31:02,717 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:31:02,717 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:31:02,717 INFO L82 PathProgramCache]: Analyzing trace with hash -1592611961, now seen corresponding path program 1 times [2018-11-22 22:31:02,717 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:31:02,717 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:31:02,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:02,720 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:31:02,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:02,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:31:02,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:02,790 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:31:02,791 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d2376629-fbcd-464c-9034-4bb2cd81db7d/bin-2019/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 22:31:02,801 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 22:31:02,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:31:02,823 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:31:02,858 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:02,873 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:31:02,873 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-11-22 22:31:02,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-22 22:31:02,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-22 22:31:02,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-11-22 22:31:02,874 INFO L87 Difference]: Start difference. First operand 319 states and 772 transitions. Second operand 8 states. [2018-11-22 22:31:02,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:31:02,954 INFO L93 Difference]: Finished difference Result 466 states and 1115 transitions. [2018-11-22 22:31:02,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-22 22:31:02,954 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2018-11-22 22:31:02,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:31:02,956 INFO L225 Difference]: With dead ends: 466 [2018-11-22 22:31:02,956 INFO L226 Difference]: Without dead ends: 335 [2018-11-22 22:31:02,956 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2018-11-22 22:31:02,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2018-11-22 22:31:02,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 300. [2018-11-22 22:31:02,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 300 states. [2018-11-22 22:31:02,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 734 transitions. [2018-11-22 22:31:02,965 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 734 transitions. Word has length 29 [2018-11-22 22:31:02,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:31:02,966 INFO L480 AbstractCegarLoop]: Abstraction has 300 states and 734 transitions. [2018-11-22 22:31:02,966 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-22 22:31:02,966 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 734 transitions. [2018-11-22 22:31:02,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-11-22 22:31:02,967 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:31:02,967 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 22:31:02,967 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:31:02,967 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:31:02,967 INFO L82 PathProgramCache]: Analyzing trace with hash 2035666861, now seen corresponding path program 1 times [2018-11-22 22:31:02,967 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:31:02,968 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:31:02,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:02,971 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 22:31:02,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:02,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:31:03,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:03,057 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:31:03,057 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d2376629-fbcd-464c-9034-4bb2cd81db7d/bin-2019/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 22:31:03,078 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 22:31:03,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:31:03,105 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:31:03,124 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:03,145 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:31:03,145 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-11-22 22:31:03,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-22 22:31:03,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-22 22:31:03,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-11-22 22:31:03,146 INFO L87 Difference]: Start difference. First operand 300 states and 734 transitions. Second operand 8 states. [2018-11-22 22:31:03,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:31:03,219 INFO L93 Difference]: Finished difference Result 482 states and 1147 transitions. [2018-11-22 22:31:03,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-22 22:31:03,220 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2018-11-22 22:31:03,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:31:03,222 INFO L225 Difference]: With dead ends: 482 [2018-11-22 22:31:03,222 INFO L226 Difference]: Without dead ends: 351 [2018-11-22 22:31:03,222 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2018-11-22 22:31:03,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2018-11-22 22:31:03,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 351. [2018-11-22 22:31:03,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351 states. [2018-11-22 22:31:03,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 836 transitions. [2018-11-22 22:31:03,229 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 836 transitions. Word has length 29 [2018-11-22 22:31:03,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:31:03,231 INFO L480 AbstractCegarLoop]: Abstraction has 351 states and 836 transitions. [2018-11-22 22:31:03,231 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-22 22:31:03,231 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 836 transitions. [2018-11-22 22:31:03,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-11-22 22:31:03,232 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:31:03,232 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 22:31:03,233 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:31:03,233 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:31:03,233 INFO L82 PathProgramCache]: Analyzing trace with hash -460714038, now seen corresponding path program 1 times [2018-11-22 22:31:03,233 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:31:03,233 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:31:03,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:03,235 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 22:31:03,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:03,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:31:03,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:03,305 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:31:03,305 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d2376629-fbcd-464c-9034-4bb2cd81db7d/bin-2019/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 22:31:03,326 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 22:31:03,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:31:03,346 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:31:03,371 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:03,386 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:31:03,387 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2018-11-22 22:31:03,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-22 22:31:03,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-22 22:31:03,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2018-11-22 22:31:03,387 INFO L87 Difference]: Start difference. First operand 351 states and 836 transitions. Second operand 9 states. [2018-11-22 22:31:03,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:31:03,469 INFO L93 Difference]: Finished difference Result 498 states and 1179 transitions. [2018-11-22 22:31:03,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-22 22:31:03,469 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2018-11-22 22:31:03,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:31:03,470 INFO L225 Difference]: With dead ends: 498 [2018-11-22 22:31:03,471 INFO L226 Difference]: Without dead ends: 367 [2018-11-22 22:31:03,471 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2018-11-22 22:31:03,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2018-11-22 22:31:03,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 316. [2018-11-22 22:31:03,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 316 states. [2018-11-22 22:31:03,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 766 transitions. [2018-11-22 22:31:03,476 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 766 transitions. Word has length 33 [2018-11-22 22:31:03,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:31:03,476 INFO L480 AbstractCegarLoop]: Abstraction has 316 states and 766 transitions. [2018-11-22 22:31:03,476 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-22 22:31:03,476 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 766 transitions. [2018-11-22 22:31:03,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-11-22 22:31:03,477 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:31:03,477 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 22:31:03,477 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:31:03,477 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:31:03,478 INFO L82 PathProgramCache]: Analyzing trace with hash 1110322378, now seen corresponding path program 2 times [2018-11-22 22:31:03,478 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:31:03,478 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:31:03,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:03,479 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 22:31:03,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:03,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:31:03,527 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:03,527 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:31:03,527 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d2376629-fbcd-464c-9034-4bb2cd81db7d/bin-2019/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 22:31:03,551 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-22 22:31:03,564 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-22 22:31:03,564 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:31:03,566 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:31:03,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:03,611 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:31:03,611 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2018-11-22 22:31:03,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-22 22:31:03,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-22 22:31:03,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2018-11-22 22:31:03,612 INFO L87 Difference]: Start difference. First operand 316 states and 766 transitions. Second operand 9 states. [2018-11-22 22:31:03,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:31:03,684 INFO L93 Difference]: Finished difference Result 514 states and 1211 transitions. [2018-11-22 22:31:03,684 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-22 22:31:03,684 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2018-11-22 22:31:03,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:31:03,685 INFO L225 Difference]: With dead ends: 514 [2018-11-22 22:31:03,685 INFO L226 Difference]: Without dead ends: 383 [2018-11-22 22:31:03,686 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 [2018-11-22 22:31:03,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2018-11-22 22:31:03,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 383. [2018-11-22 22:31:03,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 383 states. [2018-11-22 22:31:03,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 900 transitions. [2018-11-22 22:31:03,702 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 900 transitions. Word has length 33 [2018-11-22 22:31:03,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:31:03,702 INFO L480 AbstractCegarLoop]: Abstraction has 383 states and 900 transitions. [2018-11-22 22:31:03,702 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-22 22:31:03,702 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 900 transitions. [2018-11-22 22:31:03,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-11-22 22:31:03,704 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:31:03,704 INFO L402 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 22:31:03,705 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:31:03,705 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:31:03,705 INFO L82 PathProgramCache]: Analyzing trace with hash 2061178471, now seen corresponding path program 3 times [2018-11-22 22:31:03,705 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:31:03,705 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:31:03,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:03,710 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:31:03,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:03,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:31:03,776 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:03,776 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:31:03,776 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d2376629-fbcd-464c-9034-4bb2cd81db7d/bin-2019/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 22:31:03,789 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-22 22:31:03,802 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-11-22 22:31:03,802 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:31:03,804 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:31:03,817 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:03,834 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:31:03,834 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2018-11-22 22:31:03,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-22 22:31:03,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-22 22:31:03,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2018-11-22 22:31:03,835 INFO L87 Difference]: Start difference. First operand 383 states and 900 transitions. Second operand 10 states. [2018-11-22 22:31:03,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:31:03,907 INFO L93 Difference]: Finished difference Result 530 states and 1243 transitions. [2018-11-22 22:31:03,911 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-22 22:31:03,911 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2018-11-22 22:31:03,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:31:03,912 INFO L225 Difference]: With dead ends: 530 [2018-11-22 22:31:03,913 INFO L226 Difference]: Without dead ends: 399 [2018-11-22 22:31:03,913 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 [2018-11-22 22:31:03,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2018-11-22 22:31:03,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 332. [2018-11-22 22:31:03,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 332 states. [2018-11-22 22:31:03,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 798 transitions. [2018-11-22 22:31:03,920 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 798 transitions. Word has length 37 [2018-11-22 22:31:03,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:31:03,920 INFO L480 AbstractCegarLoop]: Abstraction has 332 states and 798 transitions. [2018-11-22 22:31:03,920 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-22 22:31:03,920 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 798 transitions. [2018-11-22 22:31:03,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-11-22 22:31:03,921 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:31:03,921 INFO L402 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 22:31:03,921 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:31:03,921 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:31:03,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1649592435, now seen corresponding path program 4 times [2018-11-22 22:31:03,921 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:31:03,921 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:31:03,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:03,923 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:31:03,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:03,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:31:03,974 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:03,975 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:31:03,975 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d2376629-fbcd-464c-9034-4bb2cd81db7d/bin-2019/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 22:31:03,982 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-22 22:31:03,997 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-22 22:31:03,998 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:31:03,999 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:31:04,015 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:04,030 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:31:04,030 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2018-11-22 22:31:04,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-22 22:31:04,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-22 22:31:04,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2018-11-22 22:31:04,031 INFO L87 Difference]: Start difference. First operand 332 states and 798 transitions. Second operand 10 states. [2018-11-22 22:31:04,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:31:04,089 INFO L93 Difference]: Finished difference Result 546 states and 1275 transitions. [2018-11-22 22:31:04,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-22 22:31:04,089 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2018-11-22 22:31:04,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:31:04,091 INFO L225 Difference]: With dead ends: 546 [2018-11-22 22:31:04,091 INFO L226 Difference]: Without dead ends: 415 [2018-11-22 22:31:04,091 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2018-11-22 22:31:04,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2018-11-22 22:31:04,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 415. [2018-11-22 22:31:04,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 415 states. [2018-11-22 22:31:04,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 964 transitions. [2018-11-22 22:31:04,098 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 964 transitions. Word has length 37 [2018-11-22 22:31:04,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:31:04,099 INFO L480 AbstractCegarLoop]: Abstraction has 415 states and 964 transitions. [2018-11-22 22:31:04,099 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-22 22:31:04,099 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 964 transitions. [2018-11-22 22:31:04,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-11-22 22:31:04,099 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:31:04,100 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 22:31:04,100 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:31:04,100 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:31:04,100 INFO L82 PathProgramCache]: Analyzing trace with hash 2086800042, now seen corresponding path program 5 times [2018-11-22 22:31:04,100 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:31:04,100 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:31:04,102 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:04,102 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:31:04,102 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:04,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:31:04,181 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:04,181 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:31:04,181 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d2376629-fbcd-464c-9034-4bb2cd81db7d/bin-2019/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 22:31:04,189 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-22 22:31:04,200 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2018-11-22 22:31:04,201 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:31:04,202 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:31:04,235 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:04,250 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:31:04,250 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2018-11-22 22:31:04,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-22 22:31:04,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-22 22:31:04,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2018-11-22 22:31:04,250 INFO L87 Difference]: Start difference. First operand 415 states and 964 transitions. Second operand 11 states. [2018-11-22 22:31:04,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:31:04,334 INFO L93 Difference]: Finished difference Result 562 states and 1307 transitions. [2018-11-22 22:31:04,334 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-22 22:31:04,334 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2018-11-22 22:31:04,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:31:04,335 INFO L225 Difference]: With dead ends: 562 [2018-11-22 22:31:04,335 INFO L226 Difference]: Without dead ends: 431 [2018-11-22 22:31:04,336 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2018-11-22 22:31:04,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2018-11-22 22:31:04,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 348. [2018-11-22 22:31:04,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 348 states. [2018-11-22 22:31:04,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 830 transitions. [2018-11-22 22:31:04,340 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 830 transitions. Word has length 41 [2018-11-22 22:31:04,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:31:04,340 INFO L480 AbstractCegarLoop]: Abstraction has 348 states and 830 transitions. [2018-11-22 22:31:04,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-22 22:31:04,341 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 830 transitions. [2018-11-22 22:31:04,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-11-22 22:31:04,341 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:31:04,341 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 22:31:04,341 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:31:04,341 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:31:04,342 INFO L82 PathProgramCache]: Analyzing trace with hash 449750186, now seen corresponding path program 6 times [2018-11-22 22:31:04,342 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:31:04,342 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:31:04,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:04,343 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:31:04,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:04,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:31:04,396 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:04,397 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:31:04,397 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d2376629-fbcd-464c-9034-4bb2cd81db7d/bin-2019/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 22:31:04,415 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-22 22:31:04,442 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2018-11-22 22:31:04,442 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:31:04,444 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:31:04,461 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:04,477 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:31:04,477 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2018-11-22 22:31:04,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-22 22:31:04,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-22 22:31:04,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2018-11-22 22:31:04,478 INFO L87 Difference]: Start difference. First operand 348 states and 830 transitions. Second operand 11 states. [2018-11-22 22:31:04,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:31:04,560 INFO L93 Difference]: Finished difference Result 578 states and 1339 transitions. [2018-11-22 22:31:04,560 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-22 22:31:04,560 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2018-11-22 22:31:04,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:31:04,561 INFO L225 Difference]: With dead ends: 578 [2018-11-22 22:31:04,561 INFO L226 Difference]: Without dead ends: 447 [2018-11-22 22:31:04,561 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2018-11-22 22:31:04,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2018-11-22 22:31:04,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 447. [2018-11-22 22:31:04,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 447 states. [2018-11-22 22:31:04,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 1028 transitions. [2018-11-22 22:31:04,566 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 1028 transitions. Word has length 41 [2018-11-22 22:31:04,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:31:04,566 INFO L480 AbstractCegarLoop]: Abstraction has 447 states and 1028 transitions. [2018-11-22 22:31:04,566 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-22 22:31:04,566 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 1028 transitions. [2018-11-22 22:31:04,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-11-22 22:31:04,567 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:31:04,567 INFO L402 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 22:31:04,567 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:31:04,567 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:31:04,567 INFO L82 PathProgramCache]: Analyzing trace with hash 511353159, now seen corresponding path program 7 times [2018-11-22 22:31:04,567 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:31:04,567 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:31:04,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:04,569 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:31:04,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:04,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:31:04,628 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:04,629 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:31:04,629 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d2376629-fbcd-464c-9034-4bb2cd81db7d/bin-2019/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 22:31:04,647 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 22:31:04,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:31:04,665 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:31:04,714 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:04,741 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:31:04,741 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2018-11-22 22:31:04,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-22 22:31:04,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-22 22:31:04,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2018-11-22 22:31:04,742 INFO L87 Difference]: Start difference. First operand 447 states and 1028 transitions. Second operand 12 states. [2018-11-22 22:31:04,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:31:04,849 INFO L93 Difference]: Finished difference Result 594 states and 1371 transitions. [2018-11-22 22:31:04,849 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-22 22:31:04,849 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 45 [2018-11-22 22:31:04,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:31:04,851 INFO L225 Difference]: With dead ends: 594 [2018-11-22 22:31:04,851 INFO L226 Difference]: Without dead ends: 463 [2018-11-22 22:31:04,851 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2018-11-22 22:31:04,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2018-11-22 22:31:04,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 364. [2018-11-22 22:31:04,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364 states. [2018-11-22 22:31:04,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 862 transitions. [2018-11-22 22:31:04,855 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 862 transitions. Word has length 45 [2018-11-22 22:31:04,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:31:04,855 INFO L480 AbstractCegarLoop]: Abstraction has 364 states and 862 transitions. [2018-11-22 22:31:04,855 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-22 22:31:04,855 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 862 transitions. [2018-11-22 22:31:04,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-11-22 22:31:04,856 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:31:04,856 INFO L402 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 22:31:04,856 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:31:04,856 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:31:04,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1081163923, now seen corresponding path program 8 times [2018-11-22 22:31:04,857 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:31:04,857 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:31:04,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:04,858 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 22:31:04,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:04,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:31:04,912 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:04,912 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:31:04,913 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d2376629-fbcd-464c-9034-4bb2cd81db7d/bin-2019/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 22:31:04,920 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-22 22:31:04,931 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-22 22:31:04,931 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:31:04,932 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:31:04,956 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:04,971 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:31:04,971 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2018-11-22 22:31:04,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-22 22:31:04,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-22 22:31:04,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2018-11-22 22:31:04,972 INFO L87 Difference]: Start difference. First operand 364 states and 862 transitions. Second operand 12 states. [2018-11-22 22:31:05,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:31:05,061 INFO L93 Difference]: Finished difference Result 610 states and 1403 transitions. [2018-11-22 22:31:05,062 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-22 22:31:05,062 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 45 [2018-11-22 22:31:05,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:31:05,063 INFO L225 Difference]: With dead ends: 610 [2018-11-22 22:31:05,063 INFO L226 Difference]: Without dead ends: 479 [2018-11-22 22:31:05,063 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2018-11-22 22:31:05,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2018-11-22 22:31:05,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 479. [2018-11-22 22:31:05,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 479 states. [2018-11-22 22:31:05,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 1092 transitions. [2018-11-22 22:31:05,069 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 1092 transitions. Word has length 45 [2018-11-22 22:31:05,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:31:05,069 INFO L480 AbstractCegarLoop]: Abstraction has 479 states and 1092 transitions. [2018-11-22 22:31:05,069 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-22 22:31:05,069 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 1092 transitions. [2018-11-22 22:31:05,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-11-22 22:31:05,070 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:31:05,070 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 22:31:05,070 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:31:05,070 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:31:05,070 INFO L82 PathProgramCache]: Analyzing trace with hash -578738806, now seen corresponding path program 9 times [2018-11-22 22:31:05,071 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:31:05,071 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:31:05,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:05,072 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:31:05,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:05,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:31:05,144 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:05,145 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:31:05,145 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d2376629-fbcd-464c-9034-4bb2cd81db7d/bin-2019/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 22:31:05,161 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-22 22:31:05,187 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-11-22 22:31:05,187 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:31:05,188 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:31:05,211 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:05,226 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:31:05,227 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2018-11-22 22:31:05,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-22 22:31:05,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-22 22:31:05,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2018-11-22 22:31:05,227 INFO L87 Difference]: Start difference. First operand 479 states and 1092 transitions. Second operand 13 states. [2018-11-22 22:31:05,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:31:05,354 INFO L93 Difference]: Finished difference Result 626 states and 1435 transitions. [2018-11-22 22:31:05,355 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-22 22:31:05,355 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2018-11-22 22:31:05,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:31:05,356 INFO L225 Difference]: With dead ends: 626 [2018-11-22 22:31:05,356 INFO L226 Difference]: Without dead ends: 495 [2018-11-22 22:31:05,356 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2018-11-22 22:31:05,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2018-11-22 22:31:05,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 380. [2018-11-22 22:31:05,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 380 states. [2018-11-22 22:31:05,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 894 transitions. [2018-11-22 22:31:05,362 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 894 transitions. Word has length 49 [2018-11-22 22:31:05,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:31:05,362 INFO L480 AbstractCegarLoop]: Abstraction has 380 states and 894 transitions. [2018-11-22 22:31:05,362 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-22 22:31:05,362 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 894 transitions. [2018-11-22 22:31:05,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-11-22 22:31:05,365 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:31:05,365 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 22:31:05,365 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:31:05,365 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:31:05,365 INFO L82 PathProgramCache]: Analyzing trace with hash -555139958, now seen corresponding path program 10 times [2018-11-22 22:31:05,365 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:31:05,365 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:31:05,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:05,367 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:31:05,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:05,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:31:05,420 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:05,420 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:31:05,421 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d2376629-fbcd-464c-9034-4bb2cd81db7d/bin-2019/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 22:31:05,433 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-22 22:31:05,446 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-22 22:31:05,446 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:31:05,448 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:31:05,486 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:05,501 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:31:05,501 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2018-11-22 22:31:05,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-22 22:31:05,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-22 22:31:05,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2018-11-22 22:31:05,502 INFO L87 Difference]: Start difference. First operand 380 states and 894 transitions. Second operand 13 states. [2018-11-22 22:31:05,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:31:05,651 INFO L93 Difference]: Finished difference Result 642 states and 1467 transitions. [2018-11-22 22:31:05,651 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-22 22:31:05,651 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2018-11-22 22:31:05,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:31:05,652 INFO L225 Difference]: With dead ends: 642 [2018-11-22 22:31:05,652 INFO L226 Difference]: Without dead ends: 511 [2018-11-22 22:31:05,653 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2018-11-22 22:31:05,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2018-11-22 22:31:05,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 511. [2018-11-22 22:31:05,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 511 states. [2018-11-22 22:31:05,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 1156 transitions. [2018-11-22 22:31:05,659 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 1156 transitions. Word has length 49 [2018-11-22 22:31:05,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:31:05,660 INFO L480 AbstractCegarLoop]: Abstraction has 511 states and 1156 transitions. [2018-11-22 22:31:05,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-22 22:31:05,660 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 1156 transitions. [2018-11-22 22:31:05,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-11-22 22:31:05,661 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:31:05,661 INFO L402 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 22:31:05,661 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:31:05,661 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:31:05,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1389448231, now seen corresponding path program 11 times [2018-11-22 22:31:05,661 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:31:05,661 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:31:05,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:05,663 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:31:05,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:05,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:31:05,746 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:05,746 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:31:05,746 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d2376629-fbcd-464c-9034-4bb2cd81db7d/bin-2019/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 22:31:05,759 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-22 22:31:05,790 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2018-11-22 22:31:05,790 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:31:05,792 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:31:05,811 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:05,825 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:31:05,825 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2018-11-22 22:31:05,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-22 22:31:05,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-22 22:31:05,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2018-11-22 22:31:05,826 INFO L87 Difference]: Start difference. First operand 511 states and 1156 transitions. Second operand 14 states. [2018-11-22 22:31:05,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:31:05,952 INFO L93 Difference]: Finished difference Result 658 states and 1499 transitions. [2018-11-22 22:31:05,953 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-22 22:31:05,953 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 53 [2018-11-22 22:31:05,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:31:05,954 INFO L225 Difference]: With dead ends: 658 [2018-11-22 22:31:05,954 INFO L226 Difference]: Without dead ends: 527 [2018-11-22 22:31:05,955 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2018-11-22 22:31:05,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2018-11-22 22:31:05,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 396. [2018-11-22 22:31:05,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 396 states. [2018-11-22 22:31:05,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 926 transitions. [2018-11-22 22:31:05,959 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 926 transitions. Word has length 53 [2018-11-22 22:31:05,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:31:05,960 INFO L480 AbstractCegarLoop]: Abstraction has 396 states and 926 transitions. [2018-11-22 22:31:05,960 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-22 22:31:05,960 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 926 transitions. [2018-11-22 22:31:05,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-11-22 22:31:05,960 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:31:05,961 INFO L402 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 22:31:05,961 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:31:05,961 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:31:05,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1121609549, now seen corresponding path program 12 times [2018-11-22 22:31:05,961 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:31:05,961 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:31:05,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:05,962 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:31:05,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:05,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:31:06,019 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:06,020 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:31:06,020 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d2376629-fbcd-464c-9034-4bb2cd81db7d/bin-2019/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 22:31:06,028 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-22 22:31:06,060 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-11-22 22:31:06,060 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:31:06,061 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:31:06,093 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:06,108 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:31:06,108 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2018-11-22 22:31:06,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-22 22:31:06,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-22 22:31:06,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2018-11-22 22:31:06,109 INFO L87 Difference]: Start difference. First operand 396 states and 926 transitions. Second operand 14 states. [2018-11-22 22:31:06,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:31:06,232 INFO L93 Difference]: Finished difference Result 674 states and 1531 transitions. [2018-11-22 22:31:06,232 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-22 22:31:06,232 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 53 [2018-11-22 22:31:06,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:31:06,233 INFO L225 Difference]: With dead ends: 674 [2018-11-22 22:31:06,233 INFO L226 Difference]: Without dead ends: 543 [2018-11-22 22:31:06,234 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=161, Invalid=391, Unknown=0, NotChecked=0, Total=552 [2018-11-22 22:31:06,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2018-11-22 22:31:06,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 543. [2018-11-22 22:31:06,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 543 states. [2018-11-22 22:31:06,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 1220 transitions. [2018-11-22 22:31:06,238 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 1220 transitions. Word has length 53 [2018-11-22 22:31:06,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:31:06,238 INFO L480 AbstractCegarLoop]: Abstraction has 543 states and 1220 transitions. [2018-11-22 22:31:06,238 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-22 22:31:06,238 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 1220 transitions. [2018-11-22 22:31:06,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-11-22 22:31:06,239 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:31:06,239 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 22:31:06,239 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:31:06,240 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:31:06,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1590124650, now seen corresponding path program 13 times [2018-11-22 22:31:06,240 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:31:06,240 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:31:06,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:06,241 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:31:06,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:06,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:31:06,303 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:06,303 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:31:06,303 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d2376629-fbcd-464c-9034-4bb2cd81db7d/bin-2019/uautomizer/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 22:31:06,311 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 22:31:06,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:31:06,325 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:31:06,362 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:06,377 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:31:06,378 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2018-11-22 22:31:06,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-22 22:31:06,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-22 22:31:06,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2018-11-22 22:31:06,378 INFO L87 Difference]: Start difference. First operand 543 states and 1220 transitions. Second operand 15 states. [2018-11-22 22:31:06,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:31:06,504 INFO L93 Difference]: Finished difference Result 690 states and 1563 transitions. [2018-11-22 22:31:06,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-22 22:31:06,504 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 57 [2018-11-22 22:31:06,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:31:06,506 INFO L225 Difference]: With dead ends: 690 [2018-11-22 22:31:06,506 INFO L226 Difference]: Without dead ends: 559 [2018-11-22 22:31:06,506 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=203, Invalid=447, Unknown=0, NotChecked=0, Total=650 [2018-11-22 22:31:06,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2018-11-22 22:31:06,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 412. [2018-11-22 22:31:06,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 412 states. [2018-11-22 22:31:06,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 958 transitions. [2018-11-22 22:31:06,512 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 958 transitions. Word has length 57 [2018-11-22 22:31:06,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:31:06,512 INFO L480 AbstractCegarLoop]: Abstraction has 412 states and 958 transitions. [2018-11-22 22:31:06,513 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-22 22:31:06,513 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 958 transitions. [2018-11-22 22:31:06,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-11-22 22:31:06,513 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:31:06,513 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 22:31:06,514 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:31:06,514 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:31:06,514 INFO L82 PathProgramCache]: Analyzing trace with hash 39711850, now seen corresponding path program 14 times [2018-11-22 22:31:06,514 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:31:06,514 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:31:06,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:06,515 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 22:31:06,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:06,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:31:06,582 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:06,582 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:31:06,582 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d2376629-fbcd-464c-9034-4bb2cd81db7d/bin-2019/uautomizer/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 22:31:06,589 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-22 22:31:06,604 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-22 22:31:06,604 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:31:06,606 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:31:06,648 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:06,673 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:31:06,673 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2018-11-22 22:31:06,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-22 22:31:06,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-22 22:31:06,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2018-11-22 22:31:06,674 INFO L87 Difference]: Start difference. First operand 412 states and 958 transitions. Second operand 15 states. [2018-11-22 22:31:06,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:31:06,834 INFO L93 Difference]: Finished difference Result 706 states and 1595 transitions. [2018-11-22 22:31:06,834 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-22 22:31:06,834 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 57 [2018-11-22 22:31:06,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:31:06,835 INFO L225 Difference]: With dead ends: 706 [2018-11-22 22:31:06,835 INFO L226 Difference]: Without dead ends: 575 [2018-11-22 22:31:06,836 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=196, Invalid=454, Unknown=0, NotChecked=0, Total=650 [2018-11-22 22:31:06,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2018-11-22 22:31:06,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 575. [2018-11-22 22:31:06,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 575 states. [2018-11-22 22:31:06,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 1284 transitions. [2018-11-22 22:31:06,841 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 1284 transitions. Word has length 57 [2018-11-22 22:31:06,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:31:06,842 INFO L480 AbstractCegarLoop]: Abstraction has 575 states and 1284 transitions. [2018-11-22 22:31:06,842 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-22 22:31:06,842 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 1284 transitions. [2018-11-22 22:31:06,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-11-22 22:31:06,843 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:31:06,843 INFO L402 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 22:31:06,843 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:31:06,843 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:31:06,843 INFO L82 PathProgramCache]: Analyzing trace with hash -21031161, now seen corresponding path program 15 times [2018-11-22 22:31:06,844 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:31:06,844 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:31:06,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:06,845 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:31:06,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:06,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:31:06,928 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:06,928 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:31:06,928 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d2376629-fbcd-464c-9034-4bb2cd81db7d/bin-2019/uautomizer/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 22:31:06,935 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-22 22:31:06,955 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-11-22 22:31:06,955 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:31:06,957 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:31:06,975 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:06,996 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:31:06,996 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2018-11-22 22:31:06,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-22 22:31:06,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-22 22:31:06,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2018-11-22 22:31:06,996 INFO L87 Difference]: Start difference. First operand 575 states and 1284 transitions. Second operand 16 states. [2018-11-22 22:31:07,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:31:07,126 INFO L93 Difference]: Finished difference Result 722 states and 1627 transitions. [2018-11-22 22:31:07,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-22 22:31:07,126 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 61 [2018-11-22 22:31:07,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:31:07,127 INFO L225 Difference]: With dead ends: 722 [2018-11-22 22:31:07,127 INFO L226 Difference]: Without dead ends: 591 [2018-11-22 22:31:07,127 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2018-11-22 22:31:07,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2018-11-22 22:31:07,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 428. [2018-11-22 22:31:07,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 428 states. [2018-11-22 22:31:07,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 990 transitions. [2018-11-22 22:31:07,132 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 990 transitions. Word has length 61 [2018-11-22 22:31:07,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:31:07,132 INFO L480 AbstractCegarLoop]: Abstraction has 428 states and 990 transitions. [2018-11-22 22:31:07,132 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-22 22:31:07,132 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 990 transitions. [2018-11-22 22:31:07,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-11-22 22:31:07,133 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:31:07,133 INFO L402 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 22:31:07,133 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:31:07,133 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:31:07,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1418711251, now seen corresponding path program 16 times [2018-11-22 22:31:07,133 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:31:07,134 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:31:07,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:07,135 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:31:07,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:07,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:31:07,216 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:07,217 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:31:07,217 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d2376629-fbcd-464c-9034-4bb2cd81db7d/bin-2019/uautomizer/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 22:31:07,224 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-22 22:31:07,237 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-22 22:31:07,237 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:31:07,238 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:31:07,252 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:07,267 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:31:07,267 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2018-11-22 22:31:07,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-22 22:31:07,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-22 22:31:07,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2018-11-22 22:31:07,267 INFO L87 Difference]: Start difference. First operand 428 states and 990 transitions. Second operand 16 states. [2018-11-22 22:31:07,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:31:07,401 INFO L93 Difference]: Finished difference Result 738 states and 1659 transitions. [2018-11-22 22:31:07,402 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-22 22:31:07,402 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 61 [2018-11-22 22:31:07,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:31:07,403 INFO L225 Difference]: With dead ends: 738 [2018-11-22 22:31:07,403 INFO L226 Difference]: Without dead ends: 607 [2018-11-22 22:31:07,403 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=213, Invalid=489, Unknown=0, NotChecked=0, Total=702 [2018-11-22 22:31:07,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2018-11-22 22:31:07,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 607. [2018-11-22 22:31:07,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 607 states. [2018-11-22 22:31:07,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 1348 transitions. [2018-11-22 22:31:07,409 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 1348 transitions. Word has length 61 [2018-11-22 22:31:07,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:31:07,410 INFO L480 AbstractCegarLoop]: Abstraction has 607 states and 1348 transitions. [2018-11-22 22:31:07,410 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-22 22:31:07,410 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 1348 transitions. [2018-11-22 22:31:07,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-11-22 22:31:07,411 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:31:07,411 INFO L402 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 22:31:07,411 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:31:07,411 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:31:07,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1997847370, now seen corresponding path program 17 times [2018-11-22 22:31:07,411 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:31:07,411 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:31:07,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:07,413 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:31:07,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:07,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:31:07,499 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:07,499 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:31:07,499 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d2376629-fbcd-464c-9034-4bb2cd81db7d/bin-2019/uautomizer/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 22:31:07,506 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-22 22:31:07,519 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-11-22 22:31:07,519 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:31:07,520 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:31:07,538 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:07,558 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:31:07,558 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2018-11-22 22:31:07,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-22 22:31:07,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-22 22:31:07,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2018-11-22 22:31:07,559 INFO L87 Difference]: Start difference. First operand 607 states and 1348 transitions. Second operand 17 states. [2018-11-22 22:31:07,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:31:07,704 INFO L93 Difference]: Finished difference Result 754 states and 1691 transitions. [2018-11-22 22:31:07,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-11-22 22:31:07,705 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 65 [2018-11-22 22:31:07,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:31:07,706 INFO L225 Difference]: With dead ends: 754 [2018-11-22 22:31:07,707 INFO L226 Difference]: Without dead ends: 623 [2018-11-22 22:31:07,707 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=271, Invalid=599, Unknown=0, NotChecked=0, Total=870 [2018-11-22 22:31:07,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2018-11-22 22:31:07,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 444. [2018-11-22 22:31:07,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 444 states. [2018-11-22 22:31:07,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 1022 transitions. [2018-11-22 22:31:07,718 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 1022 transitions. Word has length 65 [2018-11-22 22:31:07,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:31:07,718 INFO L480 AbstractCegarLoop]: Abstraction has 444 states and 1022 transitions. [2018-11-22 22:31:07,718 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-22 22:31:07,718 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 1022 transitions. [2018-11-22 22:31:07,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-11-22 22:31:07,721 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:31:07,721 INFO L402 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 22:31:07,721 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:31:07,721 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:31:07,721 INFO L82 PathProgramCache]: Analyzing trace with hash 420269130, now seen corresponding path program 18 times [2018-11-22 22:31:07,721 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:31:07,721 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:31:07,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:07,723 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:31:07,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:07,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:31:07,808 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:07,808 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:31:07,808 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d2376629-fbcd-464c-9034-4bb2cd81db7d/bin-2019/uautomizer/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 22:31:07,817 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-22 22:31:07,841 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-11-22 22:31:07,841 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:31:07,843 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:31:07,888 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:07,912 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:31:07,913 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2018-11-22 22:31:07,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-22 22:31:07,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-22 22:31:07,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2018-11-22 22:31:07,913 INFO L87 Difference]: Start difference. First operand 444 states and 1022 transitions. Second operand 17 states. [2018-11-22 22:31:08,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:31:08,127 INFO L93 Difference]: Finished difference Result 770 states and 1723 transitions. [2018-11-22 22:31:08,127 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-11-22 22:31:08,127 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 65 [2018-11-22 22:31:08,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:31:08,129 INFO L225 Difference]: With dead ends: 770 [2018-11-22 22:31:08,129 INFO L226 Difference]: Without dead ends: 639 [2018-11-22 22:31:08,129 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=262, Invalid=608, Unknown=0, NotChecked=0, Total=870 [2018-11-22 22:31:08,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2018-11-22 22:31:08,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 639. [2018-11-22 22:31:08,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 639 states. [2018-11-22 22:31:08,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 1412 transitions. [2018-11-22 22:31:08,134 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 1412 transitions. Word has length 65 [2018-11-22 22:31:08,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:31:08,135 INFO L480 AbstractCegarLoop]: Abstraction has 639 states and 1412 transitions. [2018-11-22 22:31:08,135 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-22 22:31:08,135 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 1412 transitions. [2018-11-22 22:31:08,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-11-22 22:31:08,136 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:31:08,136 INFO L402 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 22:31:08,136 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:31:08,136 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:31:08,136 INFO L82 PathProgramCache]: Analyzing trace with hash 690225639, now seen corresponding path program 19 times [2018-11-22 22:31:08,136 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:31:08,136 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:31:08,137 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:08,137 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:31:08,137 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:08,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:31:08,222 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:08,222 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:31:08,222 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d2376629-fbcd-464c-9034-4bb2cd81db7d/bin-2019/uautomizer/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 22:31:08,230 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 22:31:08,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:31:08,244 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:31:08,258 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:08,275 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:31:08,276 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2018-11-22 22:31:08,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-22 22:31:08,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-22 22:31:08,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2018-11-22 22:31:08,276 INFO L87 Difference]: Start difference. First operand 639 states and 1412 transitions. Second operand 18 states. [2018-11-22 22:31:08,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:31:08,448 INFO L93 Difference]: Finished difference Result 786 states and 1755 transitions. [2018-11-22 22:31:08,448 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-22 22:31:08,448 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 69 [2018-11-22 22:31:08,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:31:08,450 INFO L225 Difference]: With dead ends: 786 [2018-11-22 22:31:08,450 INFO L226 Difference]: Without dead ends: 655 [2018-11-22 22:31:08,450 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=298, Invalid=694, Unknown=0, NotChecked=0, Total=992 [2018-11-22 22:31:08,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2018-11-22 22:31:08,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 460. [2018-11-22 22:31:08,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 460 states. [2018-11-22 22:31:08,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 1054 transitions. [2018-11-22 22:31:08,454 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 1054 transitions. Word has length 69 [2018-11-22 22:31:08,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:31:08,454 INFO L480 AbstractCegarLoop]: Abstraction has 460 states and 1054 transitions. [2018-11-22 22:31:08,454 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-22 22:31:08,454 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 1054 transitions. [2018-11-22 22:31:08,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-11-22 22:31:08,455 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:31:08,455 INFO L402 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 22:31:08,455 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:31:08,455 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:31:08,455 INFO L82 PathProgramCache]: Analyzing trace with hash -1657792755, now seen corresponding path program 20 times [2018-11-22 22:31:08,456 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:31:08,456 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:31:08,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:08,457 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 22:31:08,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:08,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:31:08,561 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:08,561 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:31:08,561 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d2376629-fbcd-464c-9034-4bb2cd81db7d/bin-2019/uautomizer/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 22:31:08,573 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-22 22:31:08,586 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-22 22:31:08,586 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:31:08,587 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:31:08,604 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:08,619 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:31:08,619 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2018-11-22 22:31:08,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-22 22:31:08,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-22 22:31:08,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2018-11-22 22:31:08,620 INFO L87 Difference]: Start difference. First operand 460 states and 1054 transitions. Second operand 18 states. [2018-11-22 22:31:08,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:31:08,788 INFO L93 Difference]: Finished difference Result 802 states and 1787 transitions. [2018-11-22 22:31:08,788 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-22 22:31:08,788 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 69 [2018-11-22 22:31:08,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:31:08,789 INFO L225 Difference]: With dead ends: 802 [2018-11-22 22:31:08,789 INFO L226 Difference]: Without dead ends: 671 [2018-11-22 22:31:08,790 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=284, Invalid=708, Unknown=0, NotChecked=0, Total=992 [2018-11-22 22:31:08,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2018-11-22 22:31:08,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 671. [2018-11-22 22:31:08,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 671 states. [2018-11-22 22:31:08,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 1476 transitions. [2018-11-22 22:31:08,794 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 1476 transitions. Word has length 69 [2018-11-22 22:31:08,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:31:08,794 INFO L480 AbstractCegarLoop]: Abstraction has 671 states and 1476 transitions. [2018-11-22 22:31:08,794 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-22 22:31:08,794 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 1476 transitions. [2018-11-22 22:31:08,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-11-22 22:31:08,795 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:31:08,795 INFO L402 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 22:31:08,795 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:31:08,795 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:31:08,796 INFO L82 PathProgramCache]: Analyzing trace with hash -1119275478, now seen corresponding path program 21 times [2018-11-22 22:31:08,796 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:31:08,796 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:31:08,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:08,797 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:31:08,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:08,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:31:08,936 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:08,936 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:31:08,936 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d2376629-fbcd-464c-9034-4bb2cd81db7d/bin-2019/uautomizer/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 22:31:08,948 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-22 22:31:08,969 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-11-22 22:31:08,969 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:31:08,970 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:31:08,986 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:09,000 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:31:09,000 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2018-11-22 22:31:09,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-11-22 22:31:09,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-11-22 22:31:09,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2018-11-22 22:31:09,001 INFO L87 Difference]: Start difference. First operand 671 states and 1476 transitions. Second operand 19 states. [2018-11-22 22:31:09,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:31:09,204 INFO L93 Difference]: Finished difference Result 818 states and 1819 transitions. [2018-11-22 22:31:09,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-11-22 22:31:09,204 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 73 [2018-11-22 22:31:09,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:31:09,206 INFO L225 Difference]: With dead ends: 818 [2018-11-22 22:31:09,206 INFO L226 Difference]: Without dead ends: 687 [2018-11-22 22:31:09,206 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=315, Invalid=807, Unknown=0, NotChecked=0, Total=1122 [2018-11-22 22:31:09,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2018-11-22 22:31:09,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 476. [2018-11-22 22:31:09,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 476 states. [2018-11-22 22:31:09,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 1086 transitions. [2018-11-22 22:31:09,211 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 1086 transitions. Word has length 73 [2018-11-22 22:31:09,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:31:09,211 INFO L480 AbstractCegarLoop]: Abstraction has 476 states and 1086 transitions. [2018-11-22 22:31:09,211 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-11-22 22:31:09,211 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 1086 transitions. [2018-11-22 22:31:09,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-11-22 22:31:09,212 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:31:09,212 INFO L402 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 22:31:09,212 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:31:09,212 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:31:09,212 INFO L82 PathProgramCache]: Analyzing trace with hash -690633686, now seen corresponding path program 22 times [2018-11-22 22:31:09,212 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:31:09,212 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:31:09,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:09,213 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:31:09,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:09,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:31:09,324 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:09,325 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:31:09,325 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d2376629-fbcd-464c-9034-4bb2cd81db7d/bin-2019/uautomizer/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 22:31:09,339 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-22 22:31:09,358 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-22 22:31:09,359 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:31:09,361 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:31:09,392 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:09,416 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:31:09,416 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2018-11-22 22:31:09,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-11-22 22:31:09,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-11-22 22:31:09,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2018-11-22 22:31:09,417 INFO L87 Difference]: Start difference. First operand 476 states and 1086 transitions. Second operand 19 states. [2018-11-22 22:31:09,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:31:09,627 INFO L93 Difference]: Finished difference Result 834 states and 1851 transitions. [2018-11-22 22:31:09,627 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-11-22 22:31:09,627 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 73 [2018-11-22 22:31:09,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:31:09,629 INFO L225 Difference]: With dead ends: 834 [2018-11-22 22:31:09,629 INFO L226 Difference]: Without dead ends: 703 [2018-11-22 22:31:09,629 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=338, Invalid=784, Unknown=0, NotChecked=0, Total=1122 [2018-11-22 22:31:09,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2018-11-22 22:31:09,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 703. [2018-11-22 22:31:09,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 703 states. [2018-11-22 22:31:09,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 1540 transitions. [2018-11-22 22:31:09,633 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 1540 transitions. Word has length 73 [2018-11-22 22:31:09,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:31:09,633 INFO L480 AbstractCegarLoop]: Abstraction has 703 states and 1540 transitions. [2018-11-22 22:31:09,634 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-11-22 22:31:09,634 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 1540 transitions. [2018-11-22 22:31:09,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-11-22 22:31:09,634 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:31:09,634 INFO L402 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 22:31:09,635 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:31:09,635 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:31:09,635 INFO L82 PathProgramCache]: Analyzing trace with hash -119534393, now seen corresponding path program 23 times [2018-11-22 22:31:09,635 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:31:09,635 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:31:09,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:09,636 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:31:09,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:09,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:31:09,767 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 157 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:09,767 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:31:09,767 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d2376629-fbcd-464c-9034-4bb2cd81db7d/bin-2019/uautomizer/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 22:31:09,775 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-22 22:31:09,794 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-11-22 22:31:09,795 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:31:09,797 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:31:09,828 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 157 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:09,843 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:31:09,843 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2018-11-22 22:31:09,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-22 22:31:09,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-22 22:31:09,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2018-11-22 22:31:09,844 INFO L87 Difference]: Start difference. First operand 703 states and 1540 transitions. Second operand 20 states. [2018-11-22 22:31:10,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:31:10,051 INFO L93 Difference]: Finished difference Result 850 states and 1883 transitions. [2018-11-22 22:31:10,051 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-11-22 22:31:10,051 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 77 [2018-11-22 22:31:10,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:31:10,052 INFO L225 Difference]: With dead ends: 850 [2018-11-22 22:31:10,052 INFO L226 Difference]: Without dead ends: 719 [2018-11-22 22:31:10,053 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=379, Invalid=881, Unknown=0, NotChecked=0, Total=1260 [2018-11-22 22:31:10,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2018-11-22 22:31:10,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 492. [2018-11-22 22:31:10,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 492 states. [2018-11-22 22:31:10,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 1118 transitions. [2018-11-22 22:31:10,057 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 1118 transitions. Word has length 77 [2018-11-22 22:31:10,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:31:10,057 INFO L480 AbstractCegarLoop]: Abstraction has 492 states and 1118 transitions. [2018-11-22 22:31:10,057 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-22 22:31:10,057 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 1118 transitions. [2018-11-22 22:31:10,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-11-22 22:31:10,057 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:31:10,057 INFO L402 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 22:31:10,057 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:31:10,058 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:31:10,058 INFO L82 PathProgramCache]: Analyzing trace with hash -604365075, now seen corresponding path program 24 times [2018-11-22 22:31:10,058 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:31:10,058 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:31:10,058 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:10,058 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:31:10,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:10,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:31:10,176 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 157 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:10,176 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:31:10,176 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d2376629-fbcd-464c-9034-4bb2cd81db7d/bin-2019/uautomizer/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 22:31:10,184 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-22 22:31:10,205 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-11-22 22:31:10,206 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:31:10,207 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:31:10,225 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 157 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:10,239 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:31:10,240 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2018-11-22 22:31:10,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-22 22:31:10,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-22 22:31:10,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2018-11-22 22:31:10,240 INFO L87 Difference]: Start difference. First operand 492 states and 1118 transitions. Second operand 20 states. [2018-11-22 22:31:10,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:31:10,423 INFO L93 Difference]: Finished difference Result 866 states and 1915 transitions. [2018-11-22 22:31:10,424 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-11-22 22:31:10,424 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 77 [2018-11-22 22:31:10,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:31:10,425 INFO L225 Difference]: With dead ends: 866 [2018-11-22 22:31:10,425 INFO L226 Difference]: Without dead ends: 735 [2018-11-22 22:31:10,425 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=359, Invalid=901, Unknown=0, NotChecked=0, Total=1260 [2018-11-22 22:31:10,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2018-11-22 22:31:10,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 735. [2018-11-22 22:31:10,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 735 states. [2018-11-22 22:31:10,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 1604 transitions. [2018-11-22 22:31:10,430 INFO L78 Accepts]: Start accepts. Automaton has 735 states and 1604 transitions. Word has length 77 [2018-11-22 22:31:10,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:31:10,430 INFO L480 AbstractCegarLoop]: Abstraction has 735 states and 1604 transitions. [2018-11-22 22:31:10,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-22 22:31:10,430 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states and 1604 transitions. [2018-11-22 22:31:10,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-11-22 22:31:10,431 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:31:10,431 INFO L402 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 22:31:10,431 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:31:10,432 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:31:10,432 INFO L82 PathProgramCache]: Analyzing trace with hash -398143222, now seen corresponding path program 25 times [2018-11-22 22:31:10,432 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:31:10,432 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:31:10,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:10,433 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:31:10,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:10,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:31:10,557 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:10,557 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:31:10,557 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d2376629-fbcd-464c-9034-4bb2cd81db7d/bin-2019/uautomizer/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 22:31:10,565 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 22:31:10,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:31:10,582 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:31:10,609 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:10,623 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:31:10,623 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2018-11-22 22:31:10,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-22 22:31:10,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-22 22:31:10,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2018-11-22 22:31:10,624 INFO L87 Difference]: Start difference. First operand 735 states and 1604 transitions. Second operand 21 states. [2018-11-22 22:31:10,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:31:10,824 INFO L93 Difference]: Finished difference Result 882 states and 1947 transitions. [2018-11-22 22:31:10,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-11-22 22:31:10,825 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 81 [2018-11-22 22:31:10,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:31:10,827 INFO L225 Difference]: With dead ends: 882 [2018-11-22 22:31:10,827 INFO L226 Difference]: Without dead ends: 751 [2018-11-22 22:31:10,827 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=437, Invalid=969, Unknown=0, NotChecked=0, Total=1406 [2018-11-22 22:31:10,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2018-11-22 22:31:10,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 508. [2018-11-22 22:31:10,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 508 states. [2018-11-22 22:31:10,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 1150 transitions. [2018-11-22 22:31:10,832 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 1150 transitions. Word has length 81 [2018-11-22 22:31:10,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:31:10,832 INFO L480 AbstractCegarLoop]: Abstraction has 508 states and 1150 transitions. [2018-11-22 22:31:10,832 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-22 22:31:10,832 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 1150 transitions. [2018-11-22 22:31:10,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-11-22 22:31:10,832 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:31:10,833 INFO L402 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 22:31:10,833 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:31:10,833 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:31:10,833 INFO L82 PathProgramCache]: Analyzing trace with hash 261676042, now seen corresponding path program 26 times [2018-11-22 22:31:10,833 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:31:10,833 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:31:10,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:10,834 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 22:31:10,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:10,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:31:10,951 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:10,951 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:31:10,951 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d2376629-fbcd-464c-9034-4bb2cd81db7d/bin-2019/uautomizer/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 22:31:10,960 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-22 22:31:10,977 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-22 22:31:10,977 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:31:10,979 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:31:10,999 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:11,014 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:31:11,014 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2018-11-22 22:31:11,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-22 22:31:11,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-22 22:31:11,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2018-11-22 22:31:11,015 INFO L87 Difference]: Start difference. First operand 508 states and 1150 transitions. Second operand 21 states. [2018-11-22 22:31:11,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:31:11,263 INFO L93 Difference]: Finished difference Result 898 states and 1979 transitions. [2018-11-22 22:31:11,263 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-11-22 22:31:11,263 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 81 [2018-11-22 22:31:11,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:31:11,265 INFO L225 Difference]: With dead ends: 898 [2018-11-22 22:31:11,265 INFO L226 Difference]: Without dead ends: 767 [2018-11-22 22:31:11,265 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=424, Invalid=982, Unknown=0, NotChecked=0, Total=1406 [2018-11-22 22:31:11,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2018-11-22 22:31:11,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 767. [2018-11-22 22:31:11,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 767 states. [2018-11-22 22:31:11,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 767 states to 767 states and 1668 transitions. [2018-11-22 22:31:11,270 INFO L78 Accepts]: Start accepts. Automaton has 767 states and 1668 transitions. Word has length 81 [2018-11-22 22:31:11,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:31:11,270 INFO L480 AbstractCegarLoop]: Abstraction has 767 states and 1668 transitions. [2018-11-22 22:31:11,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-22 22:31:11,271 INFO L276 IsEmpty]: Start isEmpty. Operand 767 states and 1668 transitions. [2018-11-22 22:31:11,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-11-22 22:31:11,271 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:31:11,271 INFO L402 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 22:31:11,271 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:31:11,271 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:31:11,271 INFO L82 PathProgramCache]: Analyzing trace with hash -1261226073, now seen corresponding path program 27 times [2018-11-22 22:31:11,271 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:31:11,271 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:31:11,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:11,272 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:31:11,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:11,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:31:11,403 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:11,403 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:31:11,403 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d2376629-fbcd-464c-9034-4bb2cd81db7d/bin-2019/uautomizer/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 22:31:11,410 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-22 22:31:11,430 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-11-22 22:31:11,430 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:31:11,439 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:31:11,455 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:11,469 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:31:11,470 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2018-11-22 22:31:11,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-11-22 22:31:11,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-11-22 22:31:11,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2018-11-22 22:31:11,470 INFO L87 Difference]: Start difference. First operand 767 states and 1668 transitions. Second operand 22 states. [2018-11-22 22:31:11,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:31:11,704 INFO L93 Difference]: Finished difference Result 914 states and 2011 transitions. [2018-11-22 22:31:11,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-11-22 22:31:11,704 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 85 [2018-11-22 22:31:11,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:31:11,705 INFO L225 Difference]: With dead ends: 914 [2018-11-22 22:31:11,705 INFO L226 Difference]: Without dead ends: 783 [2018-11-22 22:31:11,706 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=470, Invalid=1090, Unknown=0, NotChecked=0, Total=1560 [2018-11-22 22:31:11,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2018-11-22 22:31:11,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 524. [2018-11-22 22:31:11,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 524 states. [2018-11-22 22:31:11,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 1182 transitions. [2018-11-22 22:31:11,710 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 1182 transitions. Word has length 85 [2018-11-22 22:31:11,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:31:11,710 INFO L480 AbstractCegarLoop]: Abstraction has 524 states and 1182 transitions. [2018-11-22 22:31:11,710 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-11-22 22:31:11,710 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 1182 transitions. [2018-11-22 22:31:11,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-11-22 22:31:11,711 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:31:11,711 INFO L402 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 22:31:11,711 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:31:11,711 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:31:11,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1269712589, now seen corresponding path program 28 times [2018-11-22 22:31:11,711 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:31:11,711 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:31:11,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:11,712 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:31:11,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:11,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:31:11,847 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:11,847 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:31:11,847 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d2376629-fbcd-464c-9034-4bb2cd81db7d/bin-2019/uautomizer/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 22:31:11,857 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-22 22:31:11,873 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-22 22:31:11,874 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:31:11,875 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:31:11,907 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:11,928 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:31:11,928 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2018-11-22 22:31:11,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-11-22 22:31:11,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-11-22 22:31:11,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2018-11-22 22:31:11,929 INFO L87 Difference]: Start difference. First operand 524 states and 1182 transitions. Second operand 22 states. [2018-11-22 22:31:12,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:31:12,156 INFO L93 Difference]: Finished difference Result 930 states and 2043 transitions. [2018-11-22 22:31:12,157 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-11-22 22:31:12,157 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 85 [2018-11-22 22:31:12,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:31:12,159 INFO L225 Difference]: With dead ends: 930 [2018-11-22 22:31:12,159 INFO L226 Difference]: Without dead ends: 799 [2018-11-22 22:31:12,159 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=450, Invalid=1032, Unknown=0, NotChecked=0, Total=1482 [2018-11-22 22:31:12,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2018-11-22 22:31:12,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 799. [2018-11-22 22:31:12,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 799 states. [2018-11-22 22:31:12,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 1732 transitions. [2018-11-22 22:31:12,165 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 1732 transitions. Word has length 85 [2018-11-22 22:31:12,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:31:12,165 INFO L480 AbstractCegarLoop]: Abstraction has 799 states and 1732 transitions. [2018-11-22 22:31:12,165 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-11-22 22:31:12,165 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 1732 transitions. [2018-11-22 22:31:12,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-11-22 22:31:12,166 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:31:12,166 INFO L402 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 22:31:12,166 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:31:12,167 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:31:12,167 INFO L82 PathProgramCache]: Analyzing trace with hash -823686166, now seen corresponding path program 29 times [2018-11-22 22:31:12,167 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:31:12,167 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:31:12,168 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:12,168 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:31:12,168 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:12,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:31:12,314 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:12,314 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:31:12,314 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d2376629-fbcd-464c-9034-4bb2cd81db7d/bin-2019/uautomizer/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 22:31:12,321 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-22 22:31:12,340 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-11-22 22:31:12,340 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:31:12,341 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:31:12,359 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:12,373 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:31:12,374 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2018-11-22 22:31:12,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-11-22 22:31:12,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-11-22 22:31:12,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2018-11-22 22:31:12,374 INFO L87 Difference]: Start difference. First operand 799 states and 1732 transitions. Second operand 23 states. [2018-11-22 22:31:12,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:31:12,666 INFO L93 Difference]: Finished difference Result 946 states and 2075 transitions. [2018-11-22 22:31:12,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-11-22 22:31:12,668 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 89 [2018-11-22 22:31:12,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:31:12,670 INFO L225 Difference]: With dead ends: 946 [2018-11-22 22:31:12,670 INFO L226 Difference]: Without dead ends: 815 [2018-11-22 22:31:12,675 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=535, Invalid=1187, Unknown=0, NotChecked=0, Total=1722 [2018-11-22 22:31:12,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 815 states. [2018-11-22 22:31:12,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 815 to 540. [2018-11-22 22:31:12,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 540 states. [2018-11-22 22:31:12,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 1214 transitions. [2018-11-22 22:31:12,682 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 1214 transitions. Word has length 89 [2018-11-22 22:31:12,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:31:12,682 INFO L480 AbstractCegarLoop]: Abstraction has 540 states and 1214 transitions. [2018-11-22 22:31:12,682 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-11-22 22:31:12,682 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 1214 transitions. [2018-11-22 22:31:12,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-11-22 22:31:12,683 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:31:12,683 INFO L402 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 22:31:12,683 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:31:12,683 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:31:12,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1221192726, now seen corresponding path program 30 times [2018-11-22 22:31:12,684 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:31:12,684 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:31:12,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:12,685 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:31:12,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:12,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:31:12,833 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:12,834 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:31:12,834 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d2376629-fbcd-464c-9034-4bb2cd81db7d/bin-2019/uautomizer/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 22:31:12,844 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-22 22:31:12,865 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-11-22 22:31:12,865 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:31:12,866 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:31:12,888 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:12,902 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:31:12,902 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2018-11-22 22:31:12,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-11-22 22:31:12,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-11-22 22:31:12,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2018-11-22 22:31:12,903 INFO L87 Difference]: Start difference. First operand 540 states and 1214 transitions. Second operand 23 states. [2018-11-22 22:31:13,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:31:13,157 INFO L93 Difference]: Finished difference Result 962 states and 2107 transitions. [2018-11-22 22:31:13,157 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-11-22 22:31:13,157 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 89 [2018-11-22 22:31:13,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:31:13,159 INFO L225 Difference]: With dead ends: 962 [2018-11-22 22:31:13,159 INFO L226 Difference]: Without dead ends: 831 [2018-11-22 22:31:13,160 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=520, Invalid=1202, Unknown=0, NotChecked=0, Total=1722 [2018-11-22 22:31:13,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2018-11-22 22:31:13,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 831. [2018-11-22 22:31:13,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 831 states. [2018-11-22 22:31:13,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 1796 transitions. [2018-11-22 22:31:13,168 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 1796 transitions. Word has length 89 [2018-11-22 22:31:13,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:31:13,168 INFO L480 AbstractCegarLoop]: Abstraction has 831 states and 1796 transitions. [2018-11-22 22:31:13,168 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-11-22 22:31:13,168 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 1796 transitions. [2018-11-22 22:31:13,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-11-22 22:31:13,169 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:31:13,169 INFO L402 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 22:31:13,169 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:31:13,169 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:31:13,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1008893305, now seen corresponding path program 31 times [2018-11-22 22:31:13,169 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:31:13,169 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:31:13,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:13,170 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:31:13,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:13,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:31:13,376 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:13,377 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:31:13,377 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d2376629-fbcd-464c-9034-4bb2cd81db7d/bin-2019/uautomizer/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 22:31:13,384 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 22:31:13,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:31:13,402 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:31:13,421 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:13,444 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:31:13,444 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2018-11-22 22:31:13,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-11-22 22:31:13,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-11-22 22:31:13,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2018-11-22 22:31:13,445 INFO L87 Difference]: Start difference. First operand 831 states and 1796 transitions. Second operand 24 states. [2018-11-22 22:31:13,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:31:13,760 INFO L93 Difference]: Finished difference Result 978 states and 2139 transitions. [2018-11-22 22:31:13,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-11-22 22:31:13,760 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 93 [2018-11-22 22:31:13,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:31:13,762 INFO L225 Difference]: With dead ends: 978 [2018-11-22 22:31:13,762 INFO L226 Difference]: Without dead ends: 847 [2018-11-22 22:31:13,763 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=571, Invalid=1321, Unknown=0, NotChecked=0, Total=1892 [2018-11-22 22:31:13,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2018-11-22 22:31:13,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 556. [2018-11-22 22:31:13,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 556 states. [2018-11-22 22:31:13,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 1246 transitions. [2018-11-22 22:31:13,768 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 1246 transitions. Word has length 93 [2018-11-22 22:31:13,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:31:13,768 INFO L480 AbstractCegarLoop]: Abstraction has 556 states and 1246 transitions. [2018-11-22 22:31:13,768 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-11-22 22:31:13,768 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 1246 transitions. [2018-11-22 22:31:13,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-11-22 22:31:13,769 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:31:13,769 INFO L402 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 22:31:13,769 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:31:13,769 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:31:13,769 INFO L82 PathProgramCache]: Analyzing trace with hash -265515347, now seen corresponding path program 32 times [2018-11-22 22:31:13,769 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:31:13,770 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:31:13,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:13,770 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 22:31:13,771 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:13,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:31:13,902 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:13,902 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:31:13,902 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d2376629-fbcd-464c-9034-4bb2cd81db7d/bin-2019/uautomizer/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 22:31:13,910 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-22 22:31:13,927 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-22 22:31:13,927 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:31:13,929 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:31:13,948 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:13,962 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:31:13,962 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2018-11-22 22:31:13,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-11-22 22:31:13,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-11-22 22:31:13,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2018-11-22 22:31:13,963 INFO L87 Difference]: Start difference. First operand 556 states and 1246 transitions. Second operand 24 states. [2018-11-22 22:31:14,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:31:14,273 INFO L93 Difference]: Finished difference Result 994 states and 2171 transitions. [2018-11-22 22:31:14,273 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-11-22 22:31:14,273 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 93 [2018-11-22 22:31:14,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:31:14,275 INFO L225 Difference]: With dead ends: 994 [2018-11-22 22:31:14,275 INFO L226 Difference]: Without dead ends: 863 [2018-11-22 22:31:14,276 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=536, Invalid=1356, Unknown=0, NotChecked=0, Total=1892 [2018-11-22 22:31:14,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2018-11-22 22:31:14,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 863. [2018-11-22 22:31:14,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 863 states. [2018-11-22 22:31:14,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 1860 transitions. [2018-11-22 22:31:14,285 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 1860 transitions. Word has length 93 [2018-11-22 22:31:14,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:31:14,285 INFO L480 AbstractCegarLoop]: Abstraction has 863 states and 1860 transitions. [2018-11-22 22:31:14,285 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-11-22 22:31:14,285 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 1860 transitions. [2018-11-22 22:31:14,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-11-22 22:31:14,286 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:31:14,286 INFO L402 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 22:31:14,286 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:31:14,286 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:31:14,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1745970890, now seen corresponding path program 33 times [2018-11-22 22:31:14,287 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:31:14,287 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:31:14,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:14,288 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:31:14,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:14,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:31:14,447 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:14,447 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:31:14,447 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d2376629-fbcd-464c-9034-4bb2cd81db7d/bin-2019/uautomizer/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 22:31:14,457 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-22 22:31:14,482 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-11-22 22:31:14,482 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:31:14,484 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:31:14,507 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:14,531 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:31:14,532 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2018-11-22 22:31:14,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-11-22 22:31:14,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-11-22 22:31:14,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2018-11-22 22:31:14,532 INFO L87 Difference]: Start difference. First operand 863 states and 1860 transitions. Second operand 25 states. [2018-11-22 22:31:14,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:31:14,827 INFO L93 Difference]: Finished difference Result 1010 states and 2203 transitions. [2018-11-22 22:31:14,828 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-11-22 22:31:14,828 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 97 [2018-11-22 22:31:14,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:31:14,829 INFO L225 Difference]: With dead ends: 1010 [2018-11-22 22:31:14,829 INFO L226 Difference]: Without dead ends: 879 [2018-11-22 22:31:14,829 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=579, Invalid=1491, Unknown=0, NotChecked=0, Total=2070 [2018-11-22 22:31:14,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2018-11-22 22:31:14,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 572. [2018-11-22 22:31:14,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 572 states. [2018-11-22 22:31:14,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 1278 transitions. [2018-11-22 22:31:14,834 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 1278 transitions. Word has length 97 [2018-11-22 22:31:14,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:31:14,834 INFO L480 AbstractCegarLoop]: Abstraction has 572 states and 1278 transitions. [2018-11-22 22:31:14,834 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-11-22 22:31:14,834 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 1278 transitions. [2018-11-22 22:31:14,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-11-22 22:31:14,834 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:31:14,834 INFO L402 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 22:31:14,835 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:31:14,835 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:31:14,835 INFO L82 PathProgramCache]: Analyzing trace with hash -510825526, now seen corresponding path program 34 times [2018-11-22 22:31:14,835 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:31:14,835 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:31:14,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:14,835 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:31:14,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:14,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:31:14,995 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:14,996 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:31:14,996 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d2376629-fbcd-464c-9034-4bb2cd81db7d/bin-2019/uautomizer/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 22:31:15,014 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-22 22:31:15,035 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-22 22:31:15,035 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:31:15,037 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:31:15,065 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:15,080 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:31:15,080 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2018-11-22 22:31:15,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-11-22 22:31:15,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-11-22 22:31:15,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2018-11-22 22:31:15,080 INFO L87 Difference]: Start difference. First operand 572 states and 1278 transitions. Second operand 25 states. [2018-11-22 22:31:15,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:31:15,391 INFO L93 Difference]: Finished difference Result 1026 states and 2235 transitions. [2018-11-22 22:31:15,392 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-11-22 22:31:15,392 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 97 [2018-11-22 22:31:15,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:31:15,393 INFO L225 Difference]: With dead ends: 1026 [2018-11-22 22:31:15,393 INFO L226 Difference]: Without dead ends: 895 [2018-11-22 22:31:15,394 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=626, Invalid=1444, Unknown=0, NotChecked=0, Total=2070 [2018-11-22 22:31:15,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2018-11-22 22:31:15,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 895. [2018-11-22 22:31:15,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 895 states. [2018-11-22 22:31:15,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 1924 transitions. [2018-11-22 22:31:15,400 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 1924 transitions. Word has length 97 [2018-11-22 22:31:15,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:31:15,400 INFO L480 AbstractCegarLoop]: Abstraction has 895 states and 1924 transitions. [2018-11-22 22:31:15,401 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-11-22 22:31:15,401 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 1924 transitions. [2018-11-22 22:31:15,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-11-22 22:31:15,401 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:31:15,402 INFO L402 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 22:31:15,402 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:31:15,402 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:31:15,402 INFO L82 PathProgramCache]: Analyzing trace with hash -1394676377, now seen corresponding path program 35 times [2018-11-22 22:31:15,402 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:31:15,402 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:31:15,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:15,403 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:31:15,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:15,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:31:15,555 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 0 proven. 343 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:15,556 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:31:15,556 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d2376629-fbcd-464c-9034-4bb2cd81db7d/bin-2019/uautomizer/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 22:31:15,567 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-22 22:31:15,590 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2018-11-22 22:31:15,590 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:31:15,591 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:31:15,634 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 0 proven. 343 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:15,649 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:31:15,649 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2018-11-22 22:31:15,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-11-22 22:31:15,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-11-22 22:31:15,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2018-11-22 22:31:15,650 INFO L87 Difference]: Start difference. First operand 895 states and 1924 transitions. Second operand 26 states. [2018-11-22 22:31:15,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:31:15,985 INFO L93 Difference]: Finished difference Result 1042 states and 2267 transitions. [2018-11-22 22:31:15,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-11-22 22:31:15,986 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 101 [2018-11-22 22:31:15,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:31:15,988 INFO L225 Difference]: With dead ends: 1042 [2018-11-22 22:31:15,988 INFO L226 Difference]: Without dead ends: 911 [2018-11-22 22:31:15,988 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=682, Invalid=1574, Unknown=0, NotChecked=0, Total=2256 [2018-11-22 22:31:15,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 911 states. [2018-11-22 22:31:15,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 911 to 588. [2018-11-22 22:31:15,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 588 states. [2018-11-22 22:31:15,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 1310 transitions. [2018-11-22 22:31:15,994 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 1310 transitions. Word has length 101 [2018-11-22 22:31:15,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:31:15,994 INFO L480 AbstractCegarLoop]: Abstraction has 588 states and 1310 transitions. [2018-11-22 22:31:15,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-11-22 22:31:15,994 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 1310 transitions. [2018-11-22 22:31:15,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-11-22 22:31:15,995 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:31:15,995 INFO L402 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 22:31:15,995 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:31:15,995 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:31:15,995 INFO L82 PathProgramCache]: Analyzing trace with hash -313198963, now seen corresponding path program 36 times [2018-11-22 22:31:15,995 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:31:15,996 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:31:15,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:15,996 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:31:15,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:16,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:31:16,149 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 0 proven. 343 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:16,149 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:31:16,149 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d2376629-fbcd-464c-9034-4bb2cd81db7d/bin-2019/uautomizer/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 22:31:16,159 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-22 22:31:16,184 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2018-11-22 22:31:16,184 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:31:16,186 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:31:16,214 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 0 proven. 343 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:16,229 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:31:16,229 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2018-11-22 22:31:16,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-11-22 22:31:16,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-11-22 22:31:16,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2018-11-22 22:31:16,230 INFO L87 Difference]: Start difference. First operand 588 states and 1310 transitions. Second operand 26 states. [2018-11-22 22:31:16,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:31:16,549 INFO L93 Difference]: Finished difference Result 1058 states and 2299 transitions. [2018-11-22 22:31:16,549 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-11-22 22:31:16,549 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 101 [2018-11-22 22:31:16,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:31:16,551 INFO L225 Difference]: With dead ends: 1058 [2018-11-22 22:31:16,551 INFO L226 Difference]: Without dead ends: 927 [2018-11-22 22:31:16,552 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=638, Invalid=1618, Unknown=0, NotChecked=0, Total=2256 [2018-11-22 22:31:16,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2018-11-22 22:31:16,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 927. [2018-11-22 22:31:16,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 927 states. [2018-11-22 22:31:16,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 927 states to 927 states and 1988 transitions. [2018-11-22 22:31:16,558 INFO L78 Accepts]: Start accepts. Automaton has 927 states and 1988 transitions. Word has length 101 [2018-11-22 22:31:16,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:31:16,559 INFO L480 AbstractCegarLoop]: Abstraction has 927 states and 1988 transitions. [2018-11-22 22:31:16,559 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-11-22 22:31:16,559 INFO L276 IsEmpty]: Start isEmpty. Operand 927 states and 1988 transitions. [2018-11-22 22:31:16,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-11-22 22:31:16,560 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:31:16,560 INFO L402 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 22:31:16,560 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:31:16,560 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:31:16,560 INFO L82 PathProgramCache]: Analyzing trace with hash -895327830, now seen corresponding path program 37 times [2018-11-22 22:31:16,560 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:31:16,560 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:31:16,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:16,561 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:31:16,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:16,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:31:16,726 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:16,727 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:31:16,727 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d2376629-fbcd-464c-9034-4bb2cd81db7d/bin-2019/uautomizer/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 22:31:16,742 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 22:31:16,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:31:16,767 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:31:16,808 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:16,822 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:31:16,822 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2018-11-22 22:31:16,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-11-22 22:31:16,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-11-22 22:31:16,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=538, Unknown=0, NotChecked=0, Total=702 [2018-11-22 22:31:16,823 INFO L87 Difference]: Start difference. First operand 927 states and 1988 transitions. Second operand 27 states. [2018-11-22 22:31:17,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:31:17,170 INFO L93 Difference]: Finished difference Result 1074 states and 2331 transitions. [2018-11-22 22:31:17,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-11-22 22:31:17,171 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 105 [2018-11-22 22:31:17,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:31:17,172 INFO L225 Difference]: With dead ends: 1074 [2018-11-22 22:31:17,172 INFO L226 Difference]: Without dead ends: 943 [2018-11-22 22:31:17,172 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=761, Invalid=1689, Unknown=0, NotChecked=0, Total=2450 [2018-11-22 22:31:17,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2018-11-22 22:31:17,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 604. [2018-11-22 22:31:17,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 604 states. [2018-11-22 22:31:17,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 1342 transitions. [2018-11-22 22:31:17,177 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 1342 transitions. Word has length 105 [2018-11-22 22:31:17,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:31:17,177 INFO L480 AbstractCegarLoop]: Abstraction has 604 states and 1342 transitions. [2018-11-22 22:31:17,177 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-11-22 22:31:17,177 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 1342 transitions. [2018-11-22 22:31:17,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-11-22 22:31:17,178 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:31:17,178 INFO L402 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 22:31:17,178 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:31:17,178 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:31:17,178 INFO L82 PathProgramCache]: Analyzing trace with hash -1031871574, now seen corresponding path program 38 times [2018-11-22 22:31:17,178 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:31:17,178 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:31:17,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:17,179 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 22:31:17,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:17,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:31:17,347 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:17,347 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:31:17,347 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d2376629-fbcd-464c-9034-4bb2cd81db7d/bin-2019/uautomizer/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 22:31:17,353 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-22 22:31:17,380 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-22 22:31:17,380 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:31:17,382 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:31:17,402 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:17,416 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:31:17,416 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2018-11-22 22:31:17,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-11-22 22:31:17,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-11-22 22:31:17,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=538, Unknown=0, NotChecked=0, Total=702 [2018-11-22 22:31:17,417 INFO L87 Difference]: Start difference. First operand 604 states and 1342 transitions. Second operand 27 states. [2018-11-22 22:31:17,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:31:17,736 INFO L93 Difference]: Finished difference Result 1090 states and 2363 transitions. [2018-11-22 22:31:17,737 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-11-22 22:31:17,737 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 105 [2018-11-22 22:31:17,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:31:17,739 INFO L225 Difference]: With dead ends: 1090 [2018-11-22 22:31:17,739 INFO L226 Difference]: Without dead ends: 959 [2018-11-22 22:31:17,739 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=742, Invalid=1708, Unknown=0, NotChecked=0, Total=2450 [2018-11-22 22:31:17,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2018-11-22 22:31:17,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 959. [2018-11-22 22:31:17,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 959 states. [2018-11-22 22:31:17,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 959 states to 959 states and 2052 transitions. [2018-11-22 22:31:17,746 INFO L78 Accepts]: Start accepts. Automaton has 959 states and 2052 transitions. Word has length 105 [2018-11-22 22:31:17,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:31:17,747 INFO L480 AbstractCegarLoop]: Abstraction has 959 states and 2052 transitions. [2018-11-22 22:31:17,747 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-11-22 22:31:17,747 INFO L276 IsEmpty]: Start isEmpty. Operand 959 states and 2052 transitions. [2018-11-22 22:31:17,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-11-22 22:31:17,748 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:31:17,748 INFO L402 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 22:31:17,748 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:31:17,748 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:31:17,748 INFO L82 PathProgramCache]: Analyzing trace with hash 381122631, now seen corresponding path program 39 times [2018-11-22 22:31:17,748 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:31:17,748 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:31:17,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:17,749 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:31:17,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:17,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:31:17,938 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 421 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:17,938 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:31:17,939 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d2376629-fbcd-464c-9034-4bb2cd81db7d/bin-2019/uautomizer/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 22:31:17,947 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-22 22:31:17,976 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-11-22 22:31:17,976 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:31:17,978 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:31:18,012 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 421 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:18,033 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:31:18,033 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2018-11-22 22:31:18,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-11-22 22:31:18,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-11-22 22:31:18,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=579, Unknown=0, NotChecked=0, Total=756 [2018-11-22 22:31:18,034 INFO L87 Difference]: Start difference. First operand 959 states and 2052 transitions. Second operand 28 states. [2018-11-22 22:31:18,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:31:18,427 INFO L93 Difference]: Finished difference Result 1106 states and 2395 transitions. [2018-11-22 22:31:18,428 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-11-22 22:31:18,428 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 109 [2018-11-22 22:31:18,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:31:18,429 INFO L225 Difference]: With dead ends: 1106 [2018-11-22 22:31:18,429 INFO L226 Difference]: Without dead ends: 975 [2018-11-22 22:31:18,430 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=803, Invalid=1849, Unknown=0, NotChecked=0, Total=2652 [2018-11-22 22:31:18,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2018-11-22 22:31:18,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 620. [2018-11-22 22:31:18,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 620 states. [2018-11-22 22:31:18,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 1374 transitions. [2018-11-22 22:31:18,437 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 1374 transitions. Word has length 109 [2018-11-22 22:31:18,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:31:18,437 INFO L480 AbstractCegarLoop]: Abstraction has 620 states and 1374 transitions. [2018-11-22 22:31:18,437 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-11-22 22:31:18,437 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 1374 transitions. [2018-11-22 22:31:18,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-11-22 22:31:18,438 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:31:18,438 INFO L402 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 22:31:18,438 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:31:18,438 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:31:18,438 INFO L82 PathProgramCache]: Analyzing trace with hash -2029552019, now seen corresponding path program 40 times [2018-11-22 22:31:18,438 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:31:18,438 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:31:18,439 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:18,439 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:31:18,439 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:18,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:31:18,616 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 421 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:18,616 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:31:18,616 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d2376629-fbcd-464c-9034-4bb2cd81db7d/bin-2019/uautomizer/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 22:31:18,632 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-22 22:31:18,653 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-22 22:31:18,653 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:31:18,655 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:31:18,696 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 421 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:18,711 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:31:18,711 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2018-11-22 22:31:18,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-11-22 22:31:18,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-11-22 22:31:18,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=579, Unknown=0, NotChecked=0, Total=756 [2018-11-22 22:31:18,711 INFO L87 Difference]: Start difference. First operand 620 states and 1374 transitions. Second operand 28 states. [2018-11-22 22:31:19,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:31:19,100 INFO L93 Difference]: Finished difference Result 1122 states and 2427 transitions. [2018-11-22 22:31:19,102 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-11-22 22:31:19,102 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 109 [2018-11-22 22:31:19,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:31:19,103 INFO L225 Difference]: With dead ends: 1122 [2018-11-22 22:31:19,103 INFO L226 Difference]: Without dead ends: 991 [2018-11-22 22:31:19,104 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=777, Invalid=1773, Unknown=0, NotChecked=0, Total=2550 [2018-11-22 22:31:19,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 991 states. [2018-11-22 22:31:19,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 991 to 991. [2018-11-22 22:31:19,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 991 states. [2018-11-22 22:31:19,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 991 states to 991 states and 2116 transitions. [2018-11-22 22:31:19,111 INFO L78 Accepts]: Start accepts. Automaton has 991 states and 2116 transitions. Word has length 109 [2018-11-22 22:31:19,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:31:19,112 INFO L480 AbstractCegarLoop]: Abstraction has 991 states and 2116 transitions. [2018-11-22 22:31:19,112 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-11-22 22:31:19,112 INFO L276 IsEmpty]: Start isEmpty. Operand 991 states and 2116 transitions. [2018-11-22 22:31:19,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-11-22 22:31:19,113 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:31:19,113 INFO L402 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 22:31:19,113 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:31:19,113 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:31:19,113 INFO L82 PathProgramCache]: Analyzing trace with hash 763001994, now seen corresponding path program 41 times [2018-11-22 22:31:19,113 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:31:19,113 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:31:19,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:19,114 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:31:19,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:19,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:31:19,307 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:19,307 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:31:19,307 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d2376629-fbcd-464c-9034-4bb2cd81db7d/bin-2019/uautomizer/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 22:31:19,316 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-22 22:31:19,360 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-11-22 22:31:19,360 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:31:19,362 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:31:19,384 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:19,399 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:31:19,399 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2018-11-22 22:31:19,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-11-22 22:31:19,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-11-22 22:31:19,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=622, Unknown=0, NotChecked=0, Total=812 [2018-11-22 22:31:19,400 INFO L87 Difference]: Start difference. First operand 991 states and 2116 transitions. Second operand 29 states. [2018-11-22 22:31:19,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:31:19,777 INFO L93 Difference]: Finished difference Result 1138 states and 2459 transitions. [2018-11-22 22:31:19,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-11-22 22:31:19,777 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 113 [2018-11-22 22:31:19,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:31:19,778 INFO L225 Difference]: With dead ends: 1138 [2018-11-22 22:31:19,778 INFO L226 Difference]: Without dead ends: 1007 [2018-11-22 22:31:19,779 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=889, Invalid=1973, Unknown=0, NotChecked=0, Total=2862 [2018-11-22 22:31:19,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1007 states. [2018-11-22 22:31:19,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1007 to 636. [2018-11-22 22:31:19,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 636 states. [2018-11-22 22:31:19,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 1406 transitions. [2018-11-22 22:31:19,784 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 1406 transitions. Word has length 113 [2018-11-22 22:31:19,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:31:19,785 INFO L480 AbstractCegarLoop]: Abstraction has 636 states and 1406 transitions. [2018-11-22 22:31:19,785 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-11-22 22:31:19,785 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 1406 transitions. [2018-11-22 22:31:19,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-11-22 22:31:19,785 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:31:19,785 INFO L402 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 22:31:19,785 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:31:19,785 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:31:19,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1377141878, now seen corresponding path program 42 times [2018-11-22 22:31:19,786 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:31:19,786 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:31:19,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:19,786 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:31:19,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:19,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:31:19,989 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:19,989 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:31:19,989 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d2376629-fbcd-464c-9034-4bb2cd81db7d/bin-2019/uautomizer/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 22:31:19,998 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-22 22:31:20,037 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2018-11-22 22:31:20,037 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:31:20,040 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:31:20,075 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:20,089 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:31:20,089 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2018-11-22 22:31:20,089 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-11-22 22:31:20,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-11-22 22:31:20,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=622, Unknown=0, NotChecked=0, Total=812 [2018-11-22 22:31:20,090 INFO L87 Difference]: Start difference. First operand 636 states and 1406 transitions. Second operand 29 states. [2018-11-22 22:31:20,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:31:20,517 INFO L93 Difference]: Finished difference Result 1154 states and 2491 transitions. [2018-11-22 22:31:20,517 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-11-22 22:31:20,517 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 113 [2018-11-22 22:31:20,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:31:20,518 INFO L225 Difference]: With dead ends: 1154 [2018-11-22 22:31:20,518 INFO L226 Difference]: Without dead ends: 1023 [2018-11-22 22:31:20,519 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=868, Invalid=1994, Unknown=0, NotChecked=0, Total=2862 [2018-11-22 22:31:20,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1023 states. [2018-11-22 22:31:20,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1023 to 1023. [2018-11-22 22:31:20,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1023 states. [2018-11-22 22:31:20,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 2180 transitions. [2018-11-22 22:31:20,530 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 2180 transitions. Word has length 113 [2018-11-22 22:31:20,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:31:20,531 INFO L480 AbstractCegarLoop]: Abstraction has 1023 states and 2180 transitions. [2018-11-22 22:31:20,531 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-11-22 22:31:20,531 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 2180 transitions. [2018-11-22 22:31:20,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-11-22 22:31:20,532 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:31:20,532 INFO L402 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 22:31:20,532 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:31:20,532 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:31:20,532 INFO L82 PathProgramCache]: Analyzing trace with hash -934862041, now seen corresponding path program 43 times [2018-11-22 22:31:20,532 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:31:20,533 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:31:20,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:20,533 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:31:20,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:20,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:31:20,763 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 507 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:20,763 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:31:20,763 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d2376629-fbcd-464c-9034-4bb2cd81db7d/bin-2019/uautomizer/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 22:31:20,773 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 22:31:20,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:31:20,794 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:31:20,820 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 507 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:20,835 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:31:20,835 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2018-11-22 22:31:20,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-11-22 22:31:20,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-11-22 22:31:20,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=666, Unknown=0, NotChecked=0, Total=870 [2018-11-22 22:31:20,836 INFO L87 Difference]: Start difference. First operand 1023 states and 2180 transitions. Second operand 30 states. [2018-11-22 22:31:21,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:31:21,248 INFO L93 Difference]: Finished difference Result 1170 states and 2523 transitions. [2018-11-22 22:31:21,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-11-22 22:31:21,248 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 117 [2018-11-22 22:31:21,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:31:21,249 INFO L225 Difference]: With dead ends: 1170 [2018-11-22 22:31:21,249 INFO L226 Difference]: Without dead ends: 1039 [2018-11-22 22:31:21,249 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=934, Invalid=2146, Unknown=0, NotChecked=0, Total=3080 [2018-11-22 22:31:21,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1039 states. [2018-11-22 22:31:21,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1039 to 652. [2018-11-22 22:31:21,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 652 states. [2018-11-22 22:31:21,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 1438 transitions. [2018-11-22 22:31:21,254 INFO L78 Accepts]: Start accepts. Automaton has 652 states and 1438 transitions. Word has length 117 [2018-11-22 22:31:21,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:31:21,254 INFO L480 AbstractCegarLoop]: Abstraction has 652 states and 1438 transitions. [2018-11-22 22:31:21,254 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-11-22 22:31:21,254 INFO L276 IsEmpty]: Start isEmpty. Operand 652 states and 1438 transitions. [2018-11-22 22:31:21,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-11-22 22:31:21,255 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:31:21,255 INFO L402 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 22:31:21,255 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:31:21,255 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:31:21,255 INFO L82 PathProgramCache]: Analyzing trace with hash 556017229, now seen corresponding path program 44 times [2018-11-22 22:31:21,255 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:31:21,255 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:31:21,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:21,256 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 22:31:21,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:21,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:31:21,456 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 507 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:21,456 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:31:21,456 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d2376629-fbcd-464c-9034-4bb2cd81db7d/bin-2019/uautomizer/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 22:31:21,464 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-22 22:31:21,481 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-22 22:31:21,481 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:31:21,483 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:31:21,506 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 507 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:21,530 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:31:21,530 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2018-11-22 22:31:21,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-11-22 22:31:21,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-11-22 22:31:21,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=666, Unknown=0, NotChecked=0, Total=870 [2018-11-22 22:31:21,531 INFO L87 Difference]: Start difference. First operand 652 states and 1438 transitions. Second operand 30 states. [2018-11-22 22:31:21,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:31:21,914 INFO L93 Difference]: Finished difference Result 1186 states and 2555 transitions. [2018-11-22 22:31:21,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-11-22 22:31:21,914 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 117 [2018-11-22 22:31:21,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:31:21,915 INFO L225 Difference]: With dead ends: 1186 [2018-11-22 22:31:21,915 INFO L226 Difference]: Without dead ends: 1055 [2018-11-22 22:31:21,915 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=869, Invalid=2211, Unknown=0, NotChecked=0, Total=3080 [2018-11-22 22:31:21,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1055 states. [2018-11-22 22:31:21,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1055 to 1055. [2018-11-22 22:31:21,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1055 states. [2018-11-22 22:31:21,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1055 states to 1055 states and 2244 transitions. [2018-11-22 22:31:21,922 INFO L78 Accepts]: Start accepts. Automaton has 1055 states and 2244 transitions. Word has length 117 [2018-11-22 22:31:21,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:31:21,922 INFO L480 AbstractCegarLoop]: Abstraction has 1055 states and 2244 transitions. [2018-11-22 22:31:21,922 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-11-22 22:31:21,922 INFO L276 IsEmpty]: Start isEmpty. Operand 1055 states and 2244 transitions. [2018-11-22 22:31:21,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-11-22 22:31:21,923 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:31:21,923 INFO L402 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 22:31:21,923 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:31:21,923 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:31:21,923 INFO L82 PathProgramCache]: Analyzing trace with hash -411453590, now seen corresponding path program 45 times [2018-11-22 22:31:21,923 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:31:21,923 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:31:21,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:21,924 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:31:21,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:21,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:31:22,127 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:22,127 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:31:22,127 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d2376629-fbcd-464c-9034-4bb2cd81db7d/bin-2019/uautomizer/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 22:31:22,134 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-22 22:31:22,162 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2018-11-22 22:31:22,162 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:31:22,163 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:31:22,233 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:22,248 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:31:22,248 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2018-11-22 22:31:22,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-11-22 22:31:22,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-11-22 22:31:22,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=712, Unknown=0, NotChecked=0, Total=930 [2018-11-22 22:31:22,249 INFO L87 Difference]: Start difference. First operand 1055 states and 2244 transitions. Second operand 31 states. [2018-11-22 22:31:22,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:31:22,649 INFO L93 Difference]: Finished difference Result 1202 states and 2587 transitions. [2018-11-22 22:31:22,649 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-11-22 22:31:22,649 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 121 [2018-11-22 22:31:22,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:31:22,650 INFO L225 Difference]: With dead ends: 1202 [2018-11-22 22:31:22,650 INFO L226 Difference]: Without dead ends: 1071 [2018-11-22 22:31:22,651 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=924, Invalid=2382, Unknown=0, NotChecked=0, Total=3306 [2018-11-22 22:31:22,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1071 states. [2018-11-22 22:31:22,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1071 to 668. [2018-11-22 22:31:22,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 668 states. [2018-11-22 22:31:22,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 1470 transitions. [2018-11-22 22:31:22,658 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 1470 transitions. Word has length 121 [2018-11-22 22:31:22,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:31:22,658 INFO L480 AbstractCegarLoop]: Abstraction has 668 states and 1470 transitions. [2018-11-22 22:31:22,658 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-11-22 22:31:22,658 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 1470 transitions. [2018-11-22 22:31:22,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-11-22 22:31:22,658 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:31:22,658 INFO L402 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 22:31:22,659 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:31:22,659 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:31:22,659 INFO L82 PathProgramCache]: Analyzing trace with hash 397423466, now seen corresponding path program 46 times [2018-11-22 22:31:22,659 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:31:22,659 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:31:22,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:22,659 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:31:22,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:22,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:31:22,870 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:22,870 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:31:22,870 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d2376629-fbcd-464c-9034-4bb2cd81db7d/bin-2019/uautomizer/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 22:31:22,879 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-22 22:31:22,899 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-22 22:31:22,899 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:31:22,901 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:31:22,925 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:22,939 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:31:22,939 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2018-11-22 22:31:22,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-11-22 22:31:22,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-11-22 22:31:22,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=712, Unknown=0, NotChecked=0, Total=930 [2018-11-22 22:31:22,940 INFO L87 Difference]: Start difference. First operand 668 states and 1470 transitions. Second operand 31 states. [2018-11-22 22:31:23,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:31:23,345 INFO L93 Difference]: Finished difference Result 1218 states and 2619 transitions. [2018-11-22 22:31:23,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-11-22 22:31:23,345 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 121 [2018-11-22 22:31:23,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:31:23,346 INFO L225 Difference]: With dead ends: 1218 [2018-11-22 22:31:23,346 INFO L226 Difference]: Without dead ends: 1087 [2018-11-22 22:31:23,346 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1004, Invalid=2302, Unknown=0, NotChecked=0, Total=3306 [2018-11-22 22:31:23,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1087 states. [2018-11-22 22:31:23,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1087 to 1087. [2018-11-22 22:31:23,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1087 states. [2018-11-22 22:31:23,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1087 states to 1087 states and 2308 transitions. [2018-11-22 22:31:23,353 INFO L78 Accepts]: Start accepts. Automaton has 1087 states and 2308 transitions. Word has length 121 [2018-11-22 22:31:23,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:31:23,353 INFO L480 AbstractCegarLoop]: Abstraction has 1087 states and 2308 transitions. [2018-11-22 22:31:23,353 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-11-22 22:31:23,353 INFO L276 IsEmpty]: Start isEmpty. Operand 1087 states and 2308 transitions. [2018-11-22 22:31:23,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-11-22 22:31:23,354 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:31:23,354 INFO L402 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 22:31:23,354 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:31:23,354 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:31:23,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1469190649, now seen corresponding path program 47 times [2018-11-22 22:31:23,354 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:31:23,354 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:31:23,355 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:23,355 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:31:23,356 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:23,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:31:23,590 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 0 proven. 601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:23,590 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:31:23,590 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d2376629-fbcd-464c-9034-4bb2cd81db7d/bin-2019/uautomizer/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 22:31:23,598 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-22 22:31:23,622 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2018-11-22 22:31:23,622 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:31:23,624 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:31:23,646 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 0 proven. 601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:23,660 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:31:23,660 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2018-11-22 22:31:23,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-11-22 22:31:23,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-11-22 22:31:23,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=759, Unknown=0, NotChecked=0, Total=992 [2018-11-22 22:31:23,661 INFO L87 Difference]: Start difference. First operand 1087 states and 2308 transitions. Second operand 32 states. [2018-11-22 22:31:24,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:31:24,074 INFO L93 Difference]: Finished difference Result 1234 states and 2651 transitions. [2018-11-22 22:31:24,074 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-11-22 22:31:24,074 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 125 [2018-11-22 22:31:24,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:31:24,075 INFO L225 Difference]: With dead ends: 1234 [2018-11-22 22:31:24,075 INFO L226 Difference]: Without dead ends: 1103 [2018-11-22 22:31:24,076 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1075, Invalid=2465, Unknown=0, NotChecked=0, Total=3540 [2018-11-22 22:31:24,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1103 states. [2018-11-22 22:31:24,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1103 to 684. [2018-11-22 22:31:24,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 684 states. [2018-11-22 22:31:24,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 1502 transitions. [2018-11-22 22:31:24,082 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 1502 transitions. Word has length 125 [2018-11-22 22:31:24,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:31:24,082 INFO L480 AbstractCegarLoop]: Abstraction has 684 states and 1502 transitions. [2018-11-22 22:31:24,082 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-11-22 22:31:24,082 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 1502 transitions. [2018-11-22 22:31:24,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-11-22 22:31:24,083 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:31:24,083 INFO L402 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 22:31:24,083 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:31:24,083 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:31:24,083 INFO L82 PathProgramCache]: Analyzing trace with hash 1066069549, now seen corresponding path program 48 times [2018-11-22 22:31:24,084 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:31:24,084 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:31:24,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:24,085 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:31:24,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:24,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:31:24,293 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 0 proven. 601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:24,293 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:31:24,293 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d2376629-fbcd-464c-9034-4bb2cd81db7d/bin-2019/uautomizer/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 22:31:24,300 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-22 22:31:24,329 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2018-11-22 22:31:24,329 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:31:24,330 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:31:24,359 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 0 proven. 601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:24,374 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:31:24,374 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2018-11-22 22:31:24,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-11-22 22:31:24,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-11-22 22:31:24,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=759, Unknown=0, NotChecked=0, Total=992 [2018-11-22 22:31:24,374 INFO L87 Difference]: Start difference. First operand 684 states and 1502 transitions. Second operand 32 states. [2018-11-22 22:31:24,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:31:24,792 INFO L93 Difference]: Finished difference Result 1250 states and 2683 transitions. [2018-11-22 22:31:24,792 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-11-22 22:31:24,792 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 125 [2018-11-22 22:31:24,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:31:24,793 INFO L225 Difference]: With dead ends: 1250 [2018-11-22 22:31:24,793 INFO L226 Difference]: Without dead ends: 1119 [2018-11-22 22:31:24,793 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 622 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=998, Invalid=2542, Unknown=0, NotChecked=0, Total=3540 [2018-11-22 22:31:24,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2018-11-22 22:31:24,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 1119. [2018-11-22 22:31:24,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1119 states. [2018-11-22 22:31:24,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 2372 transitions. [2018-11-22 22:31:24,799 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 2372 transitions. Word has length 125 [2018-11-22 22:31:24,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:31:24,800 INFO L480 AbstractCegarLoop]: Abstraction has 1119 states and 2372 transitions. [2018-11-22 22:31:24,800 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-11-22 22:31:24,800 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 2372 transitions. [2018-11-22 22:31:24,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2018-11-22 22:31:24,800 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:31:24,800 INFO L402 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 22:31:24,801 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:31:24,801 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:31:24,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1870664266, now seen corresponding path program 49 times [2018-11-22 22:31:24,801 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:31:24,801 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:31:24,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:24,801 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:31:24,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:24,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:31:25,016 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:25,016 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:31:25,016 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d2376629-fbcd-464c-9034-4bb2cd81db7d/bin-2019/uautomizer/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 22:31:25,024 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 22:31:25,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:31:25,044 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:31:25,073 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:25,087 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:31:25,088 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2018-11-22 22:31:25,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-11-22 22:31:25,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-11-22 22:31:25,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=808, Unknown=0, NotChecked=0, Total=1056 [2018-11-22 22:31:25,088 INFO L87 Difference]: Start difference. First operand 1119 states and 2372 transitions. Second operand 33 states. [2018-11-22 22:31:25,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:31:25,538 INFO L93 Difference]: Finished difference Result 1266 states and 2715 transitions. [2018-11-22 22:31:25,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-11-22 22:31:25,538 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 129 [2018-11-22 22:31:25,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:31:25,539 INFO L225 Difference]: With dead ends: 1266 [2018-11-22 22:31:25,539 INFO L226 Difference]: Without dead ends: 1135 [2018-11-22 22:31:25,539 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 720 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1175, Invalid=2607, Unknown=0, NotChecked=0, Total=3782 [2018-11-22 22:31:25,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1135 states. [2018-11-22 22:31:25,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1135 to 700. [2018-11-22 22:31:25,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 700 states. [2018-11-22 22:31:25,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 1534 transitions. [2018-11-22 22:31:25,544 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 1534 transitions. Word has length 129 [2018-11-22 22:31:25,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:31:25,545 INFO L480 AbstractCegarLoop]: Abstraction has 700 states and 1534 transitions. [2018-11-22 22:31:25,545 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-11-22 22:31:25,545 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 1534 transitions. [2018-11-22 22:31:25,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2018-11-22 22:31:25,545 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:31:25,545 INFO L402 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 22:31:25,545 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:31:25,545 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:31:25,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1817179318, now seen corresponding path program 50 times [2018-11-22 22:31:25,545 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:31:25,546 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:31:25,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:25,546 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 22:31:25,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:25,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:31:25,754 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:25,754 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:31:25,754 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d2376629-fbcd-464c-9034-4bb2cd81db7d/bin-2019/uautomizer/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 22:31:25,762 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-22 22:31:25,781 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-22 22:31:25,781 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:31:25,783 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:31:25,817 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:25,832 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:31:25,832 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2018-11-22 22:31:25,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-11-22 22:31:25,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-11-22 22:31:25,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=808, Unknown=0, NotChecked=0, Total=1056 [2018-11-22 22:31:25,832 INFO L87 Difference]: Start difference. First operand 700 states and 1534 transitions. Second operand 33 states. [2018-11-22 22:31:26,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:31:26,284 INFO L93 Difference]: Finished difference Result 1282 states and 2747 transitions. [2018-11-22 22:31:26,284 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-11-22 22:31:26,285 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 129 [2018-11-22 22:31:26,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:31:26,285 INFO L225 Difference]: With dead ends: 1282 [2018-11-22 22:31:26,285 INFO L226 Difference]: Without dead ends: 1151 [2018-11-22 22:31:26,286 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 653 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1150, Invalid=2632, Unknown=0, NotChecked=0, Total=3782 [2018-11-22 22:31:26,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1151 states. [2018-11-22 22:31:26,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1151 to 1151. [2018-11-22 22:31:26,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1151 states. [2018-11-22 22:31:26,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1151 states to 1151 states and 2436 transitions. [2018-11-22 22:31:26,292 INFO L78 Accepts]: Start accepts. Automaton has 1151 states and 2436 transitions. Word has length 129 [2018-11-22 22:31:26,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:31:26,293 INFO L480 AbstractCegarLoop]: Abstraction has 1151 states and 2436 transitions. [2018-11-22 22:31:26,293 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-11-22 22:31:26,293 INFO L276 IsEmpty]: Start isEmpty. Operand 1151 states and 2436 transitions. [2018-11-22 22:31:26,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-11-22 22:31:26,293 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:31:26,294 INFO L402 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 22:31:26,294 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:31:26,294 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:31:26,294 INFO L82 PathProgramCache]: Analyzing trace with hash -1106519833, now seen corresponding path program 51 times [2018-11-22 22:31:26,294 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:31:26,294 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:31:26,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:26,295 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:31:26,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:26,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:31:26,541 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:26,541 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:31:26,541 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d2376629-fbcd-464c-9034-4bb2cd81db7d/bin-2019/uautomizer/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 22:31:26,550 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-22 22:31:26,581 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-11-22 22:31:26,581 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:31:26,583 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:31:26,615 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:26,634 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:31:26,635 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2018-11-22 22:31:26,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-11-22 22:31:26,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-11-22 22:31:26,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=858, Unknown=0, NotChecked=0, Total=1122 [2018-11-22 22:31:26,635 INFO L87 Difference]: Start difference. First operand 1151 states and 2436 transitions. Second operand 34 states. [2018-11-22 22:31:27,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:31:27,093 INFO L93 Difference]: Finished difference Result 1298 states and 2779 transitions. [2018-11-22 22:31:27,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-11-22 22:31:27,093 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 133 [2018-11-22 22:31:27,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:31:27,094 INFO L225 Difference]: With dead ends: 1298 [2018-11-22 22:31:27,094 INFO L226 Difference]: Without dead ends: 1167 [2018-11-22 22:31:27,095 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 766 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1226, Invalid=2806, Unknown=0, NotChecked=0, Total=4032 [2018-11-22 22:31:27,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1167 states. [2018-11-22 22:31:27,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1167 to 716. [2018-11-22 22:31:27,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 716 states. [2018-11-22 22:31:27,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 1566 transitions. [2018-11-22 22:31:27,100 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 1566 transitions. Word has length 133 [2018-11-22 22:31:27,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:31:27,100 INFO L480 AbstractCegarLoop]: Abstraction has 716 states and 1566 transitions. [2018-11-22 22:31:27,100 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-11-22 22:31:27,100 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 1566 transitions. [2018-11-22 22:31:27,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-11-22 22:31:27,101 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:31:27,101 INFO L402 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 22:31:27,101 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:31:27,101 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:31:27,101 INFO L82 PathProgramCache]: Analyzing trace with hash -2044996083, now seen corresponding path program 52 times [2018-11-22 22:31:27,101 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:31:27,101 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:31:27,102 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:27,102 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:31:27,102 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:27,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:31:27,322 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:27,322 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:31:27,322 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d2376629-fbcd-464c-9034-4bb2cd81db7d/bin-2019/uautomizer/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 22:31:27,329 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-22 22:31:27,348 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-22 22:31:27,349 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:31:27,350 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:31:27,374 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:27,388 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:31:27,388 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2018-11-22 22:31:27,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-11-22 22:31:27,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-11-22 22:31:27,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=858, Unknown=0, NotChecked=0, Total=1122 [2018-11-22 22:31:27,389 INFO L87 Difference]: Start difference. First operand 716 states and 1566 transitions. Second operand 34 states. [2018-11-22 22:31:27,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:31:27,853 INFO L93 Difference]: Finished difference Result 1314 states and 2811 transitions. [2018-11-22 22:31:27,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-11-22 22:31:27,853 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 133 [2018-11-22 22:31:27,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:31:27,854 INFO L225 Difference]: With dead ends: 1314 [2018-11-22 22:31:27,854 INFO L226 Difference]: Without dead ends: 1183 [2018-11-22 22:31:27,855 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1194, Invalid=2712, Unknown=0, NotChecked=0, Total=3906 [2018-11-22 22:31:27,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1183 states. [2018-11-22 22:31:27,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1183 to 1183. [2018-11-22 22:31:27,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1183 states. [2018-11-22 22:31:27,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1183 states to 1183 states and 2500 transitions. [2018-11-22 22:31:27,863 INFO L78 Accepts]: Start accepts. Automaton has 1183 states and 2500 transitions. Word has length 133 [2018-11-22 22:31:27,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:31:27,863 INFO L480 AbstractCegarLoop]: Abstraction has 1183 states and 2500 transitions. [2018-11-22 22:31:27,864 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-11-22 22:31:27,864 INFO L276 IsEmpty]: Start isEmpty. Operand 1183 states and 2500 transitions. [2018-11-22 22:31:27,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-11-22 22:31:27,865 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:31:27,865 INFO L402 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 22:31:27,865 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:31:27,865 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:31:27,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1550683434, now seen corresponding path program 53 times [2018-11-22 22:31:27,865 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:31:27,865 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:31:27,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:27,866 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:31:27,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:27,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:31:28,107 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:28,107 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:31:28,107 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d2376629-fbcd-464c-9034-4bb2cd81db7d/bin-2019/uautomizer/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 22:31:28,115 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-22 22:31:28,141 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2018-11-22 22:31:28,142 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:31:28,143 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:31:28,192 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:28,206 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:31:28,206 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2018-11-22 22:31:28,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-11-22 22:31:28,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-11-22 22:31:28,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=910, Unknown=0, NotChecked=0, Total=1190 [2018-11-22 22:31:28,207 INFO L87 Difference]: Start difference. First operand 1183 states and 2500 transitions. Second operand 35 states. [2018-11-22 22:31:28,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:31:28,722 INFO L93 Difference]: Finished difference Result 1330 states and 2843 transitions. [2018-11-22 22:31:28,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-11-22 22:31:28,722 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 137 [2018-11-22 22:31:28,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:31:28,723 INFO L225 Difference]: With dead ends: 1330 [2018-11-22 22:31:28,723 INFO L226 Difference]: Without dead ends: 1199 [2018-11-22 22:31:28,724 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 818 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1333, Invalid=2957, Unknown=0, NotChecked=0, Total=4290 [2018-11-22 22:31:28,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1199 states. [2018-11-22 22:31:28,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1199 to 732. [2018-11-22 22:31:28,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 732 states. [2018-11-22 22:31:28,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 732 states to 732 states and 1598 transitions. [2018-11-22 22:31:28,731 INFO L78 Accepts]: Start accepts. Automaton has 732 states and 1598 transitions. Word has length 137 [2018-11-22 22:31:28,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:31:28,731 INFO L480 AbstractCegarLoop]: Abstraction has 732 states and 1598 transitions. [2018-11-22 22:31:28,731 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-11-22 22:31:28,731 INFO L276 IsEmpty]: Start isEmpty. Operand 732 states and 1598 transitions. [2018-11-22 22:31:28,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-11-22 22:31:28,732 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:31:28,732 INFO L402 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 22:31:28,732 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:31:28,732 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:31:28,732 INFO L82 PathProgramCache]: Analyzing trace with hash -708181206, now seen corresponding path program 54 times [2018-11-22 22:31:28,732 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:31:28,732 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:31:28,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:28,733 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:31:28,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:28,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:31:28,973 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:28,974 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:31:28,974 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d2376629-fbcd-464c-9034-4bb2cd81db7d/bin-2019/uautomizer/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 22:31:28,982 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-22 22:31:29,014 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2018-11-22 22:31:29,014 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:31:29,016 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:31:29,054 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:29,068 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:31:29,069 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2018-11-22 22:31:29,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-11-22 22:31:29,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-11-22 22:31:29,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=910, Unknown=0, NotChecked=0, Total=1190 [2018-11-22 22:31:29,069 INFO L87 Difference]: Start difference. First operand 732 states and 1598 transitions. Second operand 35 states. [2018-11-22 22:31:29,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:31:29,673 INFO L93 Difference]: Finished difference Result 1346 states and 2875 transitions. [2018-11-22 22:31:29,673 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-11-22 22:31:29,673 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 137 [2018-11-22 22:31:29,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:31:29,674 INFO L225 Difference]: With dead ends: 1346 [2018-11-22 22:31:29,674 INFO L226 Difference]: Without dead ends: 1215 [2018-11-22 22:31:29,675 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 745 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1306, Invalid=2984, Unknown=0, NotChecked=0, Total=4290 [2018-11-22 22:31:29,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1215 states. [2018-11-22 22:31:29,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1215 to 1215. [2018-11-22 22:31:29,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1215 states. [2018-11-22 22:31:29,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1215 states to 1215 states and 2564 transitions. [2018-11-22 22:31:29,683 INFO L78 Accepts]: Start accepts. Automaton has 1215 states and 2564 transitions. Word has length 137 [2018-11-22 22:31:29,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:31:29,683 INFO L480 AbstractCegarLoop]: Abstraction has 1215 states and 2564 transitions. [2018-11-22 22:31:29,683 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-11-22 22:31:29,683 INFO L276 IsEmpty]: Start isEmpty. Operand 1215 states and 2564 transitions. [2018-11-22 22:31:29,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2018-11-22 22:31:29,685 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:31:29,685 INFO L402 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 22:31:29,685 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:31:29,685 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:31:29,685 INFO L82 PathProgramCache]: Analyzing trace with hash 805364679, now seen corresponding path program 55 times [2018-11-22 22:31:29,685 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:31:29,685 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:31:29,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:29,686 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:31:29,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:29,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:31:29,939 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 0 proven. 813 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:29,940 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:31:29,940 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d2376629-fbcd-464c-9034-4bb2cd81db7d/bin-2019/uautomizer/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 22:31:29,948 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 22:31:29,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:31:29,969 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:31:29,999 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 0 proven. 813 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:30,013 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:31:30,013 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2018-11-22 22:31:30,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-11-22 22:31:30,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-11-22 22:31:30,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=963, Unknown=0, NotChecked=0, Total=1260 [2018-11-22 22:31:30,014 INFO L87 Difference]: Start difference. First operand 1215 states and 2564 transitions. Second operand 36 states. [2018-11-22 22:31:30,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:31:30,527 INFO L93 Difference]: Finished difference Result 1362 states and 2907 transitions. [2018-11-22 22:31:30,528 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-11-22 22:31:30,528 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 141 [2018-11-22 22:31:30,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:31:30,529 INFO L225 Difference]: With dead ends: 1362 [2018-11-22 22:31:30,529 INFO L226 Difference]: Without dead ends: 1231 [2018-11-22 22:31:30,529 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1387, Invalid=3169, Unknown=0, NotChecked=0, Total=4556 [2018-11-22 22:31:30,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1231 states. [2018-11-22 22:31:30,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1231 to 748. [2018-11-22 22:31:30,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 748 states. [2018-11-22 22:31:30,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 1630 transitions. [2018-11-22 22:31:30,535 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 1630 transitions. Word has length 141 [2018-11-22 22:31:30,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:31:30,535 INFO L480 AbstractCegarLoop]: Abstraction has 748 states and 1630 transitions. [2018-11-22 22:31:30,535 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-11-22 22:31:30,535 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 1630 transitions. [2018-11-22 22:31:30,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2018-11-22 22:31:30,535 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:31:30,536 INFO L402 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 22:31:30,536 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:31:30,536 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:31:30,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1195975187, now seen corresponding path program 56 times [2018-11-22 22:31:30,536 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:31:30,536 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:31:30,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:30,537 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 22:31:30,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:30,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:31:30,793 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 0 proven. 813 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:30,793 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:31:30,794 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d2376629-fbcd-464c-9034-4bb2cd81db7d/bin-2019/uautomizer/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 22:31:30,800 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-22 22:31:30,822 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-22 22:31:30,822 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:31:30,824 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:31:30,849 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 0 proven. 813 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:30,864 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:31:30,864 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2018-11-22 22:31:30,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-11-22 22:31:30,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-11-22 22:31:30,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=963, Unknown=0, NotChecked=0, Total=1260 [2018-11-22 22:31:30,865 INFO L87 Difference]: Start difference. First operand 748 states and 1630 transitions. Second operand 36 states. [2018-11-22 22:31:31,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:31:31,354 INFO L93 Difference]: Finished difference Result 1378 states and 2939 transitions. [2018-11-22 22:31:31,354 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-11-22 22:31:31,355 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 141 [2018-11-22 22:31:31,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:31:31,355 INFO L225 Difference]: With dead ends: 1378 [2018-11-22 22:31:31,355 INFO L226 Difference]: Without dead ends: 1247 [2018-11-22 22:31:31,356 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 808 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1283, Invalid=3273, Unknown=0, NotChecked=0, Total=4556 [2018-11-22 22:31:31,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1247 states. [2018-11-22 22:31:31,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1247 to 1247. [2018-11-22 22:31:31,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1247 states. [2018-11-22 22:31:31,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1247 states to 1247 states and 2628 transitions. [2018-11-22 22:31:31,363 INFO L78 Accepts]: Start accepts. Automaton has 1247 states and 2628 transitions. Word has length 141 [2018-11-22 22:31:31,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:31:31,363 INFO L480 AbstractCegarLoop]: Abstraction has 1247 states and 2628 transitions. [2018-11-22 22:31:31,363 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-11-22 22:31:31,363 INFO L276 IsEmpty]: Start isEmpty. Operand 1247 states and 2628 transitions. [2018-11-22 22:31:31,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2018-11-22 22:31:31,364 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:31:31,364 INFO L402 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 22:31:31,365 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:31:31,365 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:31:31,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1696737290, now seen corresponding path program 57 times [2018-11-22 22:31:31,365 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:31:31,365 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:31:31,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:31,365 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:31:31,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:31,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:31:31,629 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:31,629 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:31:31,629 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d2376629-fbcd-464c-9034-4bb2cd81db7d/bin-2019/uautomizer/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 22:31:31,637 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-22 22:31:31,671 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-11-22 22:31:31,671 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:31:31,673 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:31:31,700 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:31,714 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:31:31,714 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2018-11-22 22:31:31,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-11-22 22:31:31,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-11-22 22:31:31,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=1018, Unknown=0, NotChecked=0, Total=1332 [2018-11-22 22:31:31,715 INFO L87 Difference]: Start difference. First operand 1247 states and 2628 transitions. Second operand 37 states. [2018-11-22 22:31:32,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:31:32,221 INFO L93 Difference]: Finished difference Result 1394 states and 2971 transitions. [2018-11-22 22:31:32,221 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-11-22 22:31:32,221 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 145 [2018-11-22 22:31:32,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:31:32,222 INFO L225 Difference]: With dead ends: 1394 [2018-11-22 22:31:32,222 INFO L226 Difference]: Without dead ends: 1263 [2018-11-22 22:31:32,222 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 896 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1350, Invalid=3480, Unknown=0, NotChecked=0, Total=4830 [2018-11-22 22:31:32,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1263 states. [2018-11-22 22:31:32,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1263 to 764. [2018-11-22 22:31:32,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 764 states. [2018-11-22 22:31:32,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 1662 transitions. [2018-11-22 22:31:32,228 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 1662 transitions. Word has length 145 [2018-11-22 22:31:32,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:31:32,228 INFO L480 AbstractCegarLoop]: Abstraction has 764 states and 1662 transitions. [2018-11-22 22:31:32,228 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-11-22 22:31:32,228 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 1662 transitions. [2018-11-22 22:31:32,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2018-11-22 22:31:32,229 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:31:32,229 INFO L402 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 22:31:32,229 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:31:32,229 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:31:32,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1310844150, now seen corresponding path program 58 times [2018-11-22 22:31:32,229 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:31:32,229 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:31:32,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:32,230 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:31:32,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:32,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:31:32,487 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:32,488 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:31:32,488 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d2376629-fbcd-464c-9034-4bb2cd81db7d/bin-2019/uautomizer/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 22:31:32,496 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-22 22:31:32,518 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-22 22:31:32,519 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:31:32,520 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:31:32,550 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:32,564 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:31:32,564 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2018-11-22 22:31:32,564 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-11-22 22:31:32,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-11-22 22:31:32,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=1018, Unknown=0, NotChecked=0, Total=1332 [2018-11-22 22:31:32,565 INFO L87 Difference]: Start difference. First operand 764 states and 1662 transitions. Second operand 37 states. [2018-11-22 22:31:33,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:31:33,135 INFO L93 Difference]: Finished difference Result 1410 states and 3003 transitions. [2018-11-22 22:31:33,135 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-11-22 22:31:33,135 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 145 [2018-11-22 22:31:33,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:31:33,136 INFO L225 Difference]: With dead ends: 1410 [2018-11-22 22:31:33,136 INFO L226 Difference]: Without dead ends: 1279 [2018-11-22 22:31:33,137 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 843 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1472, Invalid=3358, Unknown=0, NotChecked=0, Total=4830 [2018-11-22 22:31:33,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1279 states. [2018-11-22 22:31:33,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1279 to 1279. [2018-11-22 22:31:33,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1279 states. [2018-11-22 22:31:33,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1279 states to 1279 states and 2692 transitions. [2018-11-22 22:31:33,144 INFO L78 Accepts]: Start accepts. Automaton has 1279 states and 2692 transitions. Word has length 145 [2018-11-22 22:31:33,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:31:33,145 INFO L480 AbstractCegarLoop]: Abstraction has 1279 states and 2692 transitions. [2018-11-22 22:31:33,145 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-11-22 22:31:33,145 INFO L276 IsEmpty]: Start isEmpty. Operand 1279 states and 2692 transitions. [2018-11-22 22:31:33,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-11-22 22:31:33,146 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:31:33,146 INFO L402 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 22:31:33,146 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:31:33,146 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:31:33,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1160580775, now seen corresponding path program 59 times [2018-11-22 22:31:33,147 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:31:33,147 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:31:33,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:33,148 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:31:33,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:33,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:31:33,481 INFO L134 CoverageAnalysis]: Checked inductivity of 931 backedges. 0 proven. 931 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:33,481 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:31:33,481 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d2376629-fbcd-464c-9034-4bb2cd81db7d/bin-2019/uautomizer/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 22:31:33,490 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-22 22:31:33,521 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2018-11-22 22:31:33,521 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:31:33,523 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:31:33,562 INFO L134 CoverageAnalysis]: Checked inductivity of 931 backedges. 0 proven. 931 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:33,576 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:31:33,577 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2018-11-22 22:31:33,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-11-22 22:31:33,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-11-22 22:31:33,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=1074, Unknown=0, NotChecked=0, Total=1406 [2018-11-22 22:31:33,577 INFO L87 Difference]: Start difference. First operand 1279 states and 2692 transitions. Second operand 38 states. [2018-11-22 22:31:34,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:31:34,152 INFO L93 Difference]: Finished difference Result 1426 states and 3035 transitions. [2018-11-22 22:31:34,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-11-22 22:31:34,153 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 149 [2018-11-22 22:31:34,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:31:34,154 INFO L225 Difference]: With dead ends: 1426 [2018-11-22 22:31:34,154 INFO L226 Difference]: Without dead ends: 1295 [2018-11-22 22:31:34,154 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 974 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1558, Invalid=3554, Unknown=0, NotChecked=0, Total=5112 [2018-11-22 22:31:34,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1295 states. [2018-11-22 22:31:34,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1295 to 780. [2018-11-22 22:31:34,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 780 states. [2018-11-22 22:31:34,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 1694 transitions. [2018-11-22 22:31:34,160 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 1694 transitions. Word has length 149 [2018-11-22 22:31:34,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:31:34,160 INFO L480 AbstractCegarLoop]: Abstraction has 780 states and 1694 transitions. [2018-11-22 22:31:34,160 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-11-22 22:31:34,161 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 1694 transitions. [2018-11-22 22:31:34,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-11-22 22:31:34,161 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:31:34,161 INFO L402 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 22:31:34,161 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:31:34,162 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:31:34,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1153694259, now seen corresponding path program 60 times [2018-11-22 22:31:34,162 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:31:34,162 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:31:34,163 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:34,163 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:31:34,163 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:34,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:31:34,453 INFO L134 CoverageAnalysis]: Checked inductivity of 931 backedges. 0 proven. 931 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:34,454 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:31:34,454 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d2376629-fbcd-464c-9034-4bb2cd81db7d/bin-2019/uautomizer/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 22:31:34,461 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-22 22:31:34,496 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2018-11-22 22:31:34,496 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:31:34,498 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:31:34,536 INFO L134 CoverageAnalysis]: Checked inductivity of 931 backedges. 0 proven. 931 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:34,550 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:31:34,550 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2018-11-22 22:31:34,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-11-22 22:31:34,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-11-22 22:31:34,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=1074, Unknown=0, NotChecked=0, Total=1406 [2018-11-22 22:31:34,551 INFO L87 Difference]: Start difference. First operand 780 states and 1694 transitions. Second operand 38 states. [2018-11-22 22:31:35,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:31:35,092 INFO L93 Difference]: Finished difference Result 1442 states and 3067 transitions. [2018-11-22 22:31:35,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-11-22 22:31:35,092 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 149 [2018-11-22 22:31:35,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:31:35,093 INFO L225 Difference]: With dead ends: 1442 [2018-11-22 22:31:35,093 INFO L226 Difference]: Without dead ends: 1311 [2018-11-22 22:31:35,094 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 910 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1439, Invalid=3673, Unknown=0, NotChecked=0, Total=5112 [2018-11-22 22:31:35,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1311 states. [2018-11-22 22:31:35,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1311 to 1311. [2018-11-22 22:31:35,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1311 states. [2018-11-22 22:31:35,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1311 states to 1311 states and 2756 transitions. [2018-11-22 22:31:35,103 INFO L78 Accepts]: Start accepts. Automaton has 1311 states and 2756 transitions. Word has length 149 [2018-11-22 22:31:35,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:31:35,103 INFO L480 AbstractCegarLoop]: Abstraction has 1311 states and 2756 transitions. [2018-11-22 22:31:35,103 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-11-22 22:31:35,103 INFO L276 IsEmpty]: Start isEmpty. Operand 1311 states and 2756 transitions. [2018-11-22 22:31:35,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2018-11-22 22:31:35,105 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:31:35,105 INFO L402 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 22:31:35,105 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:31:35,105 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:31:35,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1618862826, now seen corresponding path program 61 times [2018-11-22 22:31:35,105 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:31:35,105 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:31:35,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:35,106 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:31:35,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:35,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:31:35,446 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:35,446 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:31:35,446 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d2376629-fbcd-464c-9034-4bb2cd81db7d/bin-2019/uautomizer/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 22:31:35,458 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 22:31:35,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:31:35,485 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:31:35,540 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:35,554 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:31:35,555 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2018-11-22 22:31:35,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-11-22 22:31:35,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-11-22 22:31:35,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=1132, Unknown=0, NotChecked=0, Total=1482 [2018-11-22 22:31:35,555 INFO L87 Difference]: Start difference. First operand 1311 states and 2756 transitions. Second operand 39 states. [2018-11-22 22:31:36,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:31:36,146 INFO L93 Difference]: Finished difference Result 1458 states and 3099 transitions. [2018-11-22 22:31:36,146 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-11-22 22:31:36,147 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 153 [2018-11-22 22:31:36,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:31:36,147 INFO L225 Difference]: With dead ends: 1458 [2018-11-22 22:31:36,147 INFO L226 Difference]: Without dead ends: 1327 [2018-11-22 22:31:36,148 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1032 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1679, Invalid=3723, Unknown=0, NotChecked=0, Total=5402 [2018-11-22 22:31:36,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1327 states. [2018-11-22 22:31:36,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1327 to 796. [2018-11-22 22:31:36,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 796 states. [2018-11-22 22:31:36,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 1726 transitions. [2018-11-22 22:31:36,154 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 1726 transitions. Word has length 153 [2018-11-22 22:31:36,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:31:36,154 INFO L480 AbstractCegarLoop]: Abstraction has 796 states and 1726 transitions. [2018-11-22 22:31:36,154 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-11-22 22:31:36,154 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 1726 transitions. [2018-11-22 22:31:36,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2018-11-22 22:31:36,155 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:31:36,155 INFO L402 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 22:31:36,155 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:31:36,155 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:31:36,155 INFO L82 PathProgramCache]: Analyzing trace with hash 466375402, now seen corresponding path program 62 times [2018-11-22 22:31:36,155 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:31:36,155 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:31:36,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:36,156 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 22:31:36,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:36,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:31:36,457 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:36,457 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:31:36,457 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d2376629-fbcd-464c-9034-4bb2cd81db7d/bin-2019/uautomizer/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 22:31:36,465 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-22 22:31:36,487 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-22 22:31:36,487 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:31:36,489 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:31:36,525 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:36,539 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:31:36,539 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2018-11-22 22:31:36,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-11-22 22:31:36,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-11-22 22:31:36,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=1132, Unknown=0, NotChecked=0, Total=1482 [2018-11-22 22:31:36,540 INFO L87 Difference]: Start difference. First operand 796 states and 1726 transitions. Second operand 39 states. [2018-11-22 22:31:37,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:31:37,161 INFO L93 Difference]: Finished difference Result 1474 states and 3131 transitions. [2018-11-22 22:31:37,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-11-22 22:31:37,161 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 153 [2018-11-22 22:31:37,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:31:37,162 INFO L225 Difference]: With dead ends: 1474 [2018-11-22 22:31:37,162 INFO L226 Difference]: Without dead ends: 1343 [2018-11-22 22:31:37,163 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 947 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1648, Invalid=3754, Unknown=0, NotChecked=0, Total=5402 [2018-11-22 22:31:37,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1343 states. [2018-11-22 22:31:37,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1343 to 1343. [2018-11-22 22:31:37,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1343 states. [2018-11-22 22:31:37,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1343 states to 1343 states and 2820 transitions. [2018-11-22 22:31:37,173 INFO L78 Accepts]: Start accepts. Automaton has 1343 states and 2820 transitions. Word has length 153 [2018-11-22 22:31:37,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:31:37,173 INFO L480 AbstractCegarLoop]: Abstraction has 1343 states and 2820 transitions. [2018-11-22 22:31:37,173 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-11-22 22:31:37,174 INFO L276 IsEmpty]: Start isEmpty. Operand 1343 states and 2820 transitions. [2018-11-22 22:31:37,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2018-11-22 22:31:37,176 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:31:37,176 INFO L402 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 22:31:37,176 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:31:37,176 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:31:37,176 INFO L82 PathProgramCache]: Analyzing trace with hash 1685084551, now seen corresponding path program 63 times [2018-11-22 22:31:37,176 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:31:37,177 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:31:37,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:37,178 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:31:37,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:37,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:31:37,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1057 backedges. 0 proven. 1057 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:37,529 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:31:37,529 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d2376629-fbcd-464c-9034-4bb2cd81db7d/bin-2019/uautomizer/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 22:31:37,537 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-22 22:31:37,574 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-11-22 22:31:37,574 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:31:37,576 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:31:37,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1057 backedges. 0 proven. 1057 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:37,618 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:31:37,619 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2018-11-22 22:31:37,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-11-22 22:31:37,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-11-22 22:31:37,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=1191, Unknown=0, NotChecked=0, Total=1560 [2018-11-22 22:31:37,619 INFO L87 Difference]: Start difference. First operand 1343 states and 2820 transitions. Second operand 40 states. [2018-11-22 22:31:38,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:31:38,221 INFO L93 Difference]: Finished difference Result 1490 states and 3163 transitions. [2018-11-22 22:31:38,221 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-11-22 22:31:38,221 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 157 [2018-11-22 22:31:38,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:31:38,223 INFO L225 Difference]: With dead ends: 1490 [2018-11-22 22:31:38,223 INFO L226 Difference]: Without dead ends: 1359 [2018-11-22 22:31:38,223 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1087 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1739, Invalid=3961, Unknown=0, NotChecked=0, Total=5700 [2018-11-22 22:31:38,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1359 states. [2018-11-22 22:31:38,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1359 to 812. [2018-11-22 22:31:38,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 812 states. [2018-11-22 22:31:38,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 1758 transitions. [2018-11-22 22:31:38,231 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 1758 transitions. Word has length 157 [2018-11-22 22:31:38,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:31:38,231 INFO L480 AbstractCegarLoop]: Abstraction has 812 states and 1758 transitions. [2018-11-22 22:31:38,231 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-11-22 22:31:38,231 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 1758 transitions. [2018-11-22 22:31:38,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2018-11-22 22:31:38,232 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:31:38,232 INFO L402 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 22:31:38,232 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:31:38,232 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:31:38,232 INFO L82 PathProgramCache]: Analyzing trace with hash -1853141587, now seen corresponding path program 64 times [2018-11-22 22:31:38,232 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:31:38,233 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:31:38,233 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:38,233 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:31:38,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:38,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:31:38,533 INFO L134 CoverageAnalysis]: Checked inductivity of 1057 backedges. 0 proven. 1057 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:38,534 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:31:38,534 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d2376629-fbcd-464c-9034-4bb2cd81db7d/bin-2019/uautomizer/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 22:31:38,543 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-22 22:31:38,566 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-22 22:31:38,566 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:31:38,568 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:31:38,597 INFO L134 CoverageAnalysis]: Checked inductivity of 1057 backedges. 0 proven. 1057 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:38,611 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:31:38,611 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2018-11-22 22:31:38,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-11-22 22:31:38,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-11-22 22:31:38,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=1191, Unknown=0, NotChecked=0, Total=1560 [2018-11-22 22:31:38,612 INFO L87 Difference]: Start difference. First operand 812 states and 1758 transitions. Second operand 40 states. [2018-11-22 22:31:39,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:31:39,234 INFO L93 Difference]: Finished difference Result 1506 states and 3195 transitions. [2018-11-22 22:31:39,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-11-22 22:31:39,235 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 157 [2018-11-22 22:31:39,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:31:39,236 INFO L225 Difference]: With dead ends: 1506 [2018-11-22 22:31:39,236 INFO L226 Difference]: Without dead ends: 1375 [2018-11-22 22:31:39,237 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 967 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1701, Invalid=3849, Unknown=0, NotChecked=0, Total=5550 [2018-11-22 22:31:39,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1375 states. [2018-11-22 22:31:39,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1375 to 1375. [2018-11-22 22:31:39,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1375 states. [2018-11-22 22:31:39,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1375 states to 1375 states and 2884 transitions. [2018-11-22 22:31:39,246 INFO L78 Accepts]: Start accepts. Automaton has 1375 states and 2884 transitions. Word has length 157 [2018-11-22 22:31:39,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:31:39,246 INFO L480 AbstractCegarLoop]: Abstraction has 1375 states and 2884 transitions. [2018-11-22 22:31:39,246 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-11-22 22:31:39,246 INFO L276 IsEmpty]: Start isEmpty. Operand 1375 states and 2884 transitions. [2018-11-22 22:31:39,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2018-11-22 22:31:39,247 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:31:39,247 INFO L402 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 22:31:39,248 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:31:39,248 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:31:39,248 INFO L82 PathProgramCache]: Analyzing trace with hash 1163967946, now seen corresponding path program 65 times [2018-11-22 22:31:39,248 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:31:39,248 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:31:39,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:39,249 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:31:39,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:39,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:31:39,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:39,583 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:31:39,583 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d2376629-fbcd-464c-9034-4bb2cd81db7d/bin-2019/uautomizer/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 22:31:39,593 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-22 22:31:39,624 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-11-22 22:31:39,624 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:31:39,626 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:31:39,656 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:39,670 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:31:39,670 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2018-11-22 22:31:39,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-11-22 22:31:39,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-11-22 22:31:39,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=388, Invalid=1252, Unknown=0, NotChecked=0, Total=1640 [2018-11-22 22:31:39,671 INFO L87 Difference]: Start difference. First operand 1375 states and 2884 transitions. Second operand 41 states. [2018-11-22 22:31:40,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:31:40,320 INFO L93 Difference]: Finished difference Result 1522 states and 3227 transitions. [2018-11-22 22:31:40,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-11-22 22:31:40,321 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 161 [2018-11-22 22:31:40,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:31:40,322 INFO L225 Difference]: With dead ends: 1522 [2018-11-22 22:31:40,322 INFO L226 Difference]: Without dead ends: 1391 [2018-11-22 22:31:40,322 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1148 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1867, Invalid=4139, Unknown=0, NotChecked=0, Total=6006 [2018-11-22 22:31:40,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1391 states. [2018-11-22 22:31:40,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1391 to 828. [2018-11-22 22:31:40,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 828 states. [2018-11-22 22:31:40,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 1790 transitions. [2018-11-22 22:31:40,328 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 1790 transitions. Word has length 161 [2018-11-22 22:31:40,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:31:40,328 INFO L480 AbstractCegarLoop]: Abstraction has 828 states and 1790 transitions. [2018-11-22 22:31:40,328 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-11-22 22:31:40,328 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 1790 transitions. [2018-11-22 22:31:40,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2018-11-22 22:31:40,329 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:31:40,329 INFO L402 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 22:31:40,329 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:31:40,329 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:31:40,330 INFO L82 PathProgramCache]: Analyzing trace with hash 661957322, now seen corresponding path program 66 times [2018-11-22 22:31:40,330 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:31:40,330 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:31:40,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:40,330 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:31:40,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:40,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:31:40,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:40,655 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:31:40,655 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d2376629-fbcd-464c-9034-4bb2cd81db7d/bin-2019/uautomizer/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 22:31:40,669 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-22 22:31:40,720 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2018-11-22 22:31:40,720 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:31:40,722 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:31:40,751 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:40,765 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:31:40,766 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2018-11-22 22:31:40,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-11-22 22:31:40,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-11-22 22:31:40,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=388, Invalid=1252, Unknown=0, NotChecked=0, Total=1640 [2018-11-22 22:31:40,766 INFO L87 Difference]: Start difference. First operand 828 states and 1790 transitions. Second operand 41 states. [2018-11-22 22:31:41,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:31:41,439 INFO L93 Difference]: Finished difference Result 1538 states and 3259 transitions. [2018-11-22 22:31:41,439 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-11-22 22:31:41,439 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 161 [2018-11-22 22:31:41,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:31:41,440 INFO L225 Difference]: With dead ends: 1538 [2018-11-22 22:31:41,440 INFO L226 Difference]: Without dead ends: 1407 [2018-11-22 22:31:41,440 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1057 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1834, Invalid=4172, Unknown=0, NotChecked=0, Total=6006 [2018-11-22 22:31:41,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1407 states. [2018-11-22 22:31:41,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1407 to 1407. [2018-11-22 22:31:41,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1407 states. [2018-11-22 22:31:41,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1407 states to 1407 states and 2948 transitions. [2018-11-22 22:31:41,448 INFO L78 Accepts]: Start accepts. Automaton has 1407 states and 2948 transitions. Word has length 161 [2018-11-22 22:31:41,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:31:41,448 INFO L480 AbstractCegarLoop]: Abstraction has 1407 states and 2948 transitions. [2018-11-22 22:31:41,448 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-11-22 22:31:41,448 INFO L276 IsEmpty]: Start isEmpty. Operand 1407 states and 2948 transitions. [2018-11-22 22:31:41,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2018-11-22 22:31:41,449 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:31:41,449 INFO L402 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 22:31:41,450 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:31:41,450 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:31:41,450 INFO L82 PathProgramCache]: Analyzing trace with hash 346735719, now seen corresponding path program 67 times [2018-11-22 22:31:41,450 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:31:41,450 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:31:41,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:41,451 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:31:41,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:41,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:31:41,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1191 backedges. 0 proven. 1191 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:41,816 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:31:41,816 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d2376629-fbcd-464c-9034-4bb2cd81db7d/bin-2019/uautomizer/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 22:31:41,825 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 22:31:41,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:31:41,849 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:31:41,880 INFO L134 CoverageAnalysis]: Checked inductivity of 1191 backedges. 0 proven. 1191 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:41,894 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:31:41,894 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2018-11-22 22:31:41,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-11-22 22:31:41,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-11-22 22:31:41,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=1314, Unknown=0, NotChecked=0, Total=1722 [2018-11-22 22:31:41,895 INFO L87 Difference]: Start difference. First operand 1407 states and 2948 transitions. Second operand 42 states. [2018-11-22 22:31:42,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:31:42,554 INFO L93 Difference]: Finished difference Result 1554 states and 3291 transitions. [2018-11-22 22:31:42,554 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-11-22 22:31:42,554 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 165 [2018-11-22 22:31:42,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:31:42,555 INFO L225 Difference]: With dead ends: 1554 [2018-11-22 22:31:42,556 INFO L226 Difference]: Without dead ends: 1423 [2018-11-22 22:31:42,556 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1206 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1930, Invalid=4390, Unknown=0, NotChecked=0, Total=6320 [2018-11-22 22:31:42,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1423 states. [2018-11-22 22:31:42,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1423 to 844. [2018-11-22 22:31:42,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 844 states. [2018-11-22 22:31:42,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 1822 transitions. [2018-11-22 22:31:42,564 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 1822 transitions. Word has length 165 [2018-11-22 22:31:42,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:31:42,564 INFO L480 AbstractCegarLoop]: Abstraction has 844 states and 1822 transitions. [2018-11-22 22:31:42,564 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-11-22 22:31:42,564 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 1822 transitions. [2018-11-22 22:31:42,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2018-11-22 22:31:42,565 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:31:42,565 INFO L402 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 22:31:42,565 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:31:42,565 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:31:42,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1602532749, now seen corresponding path program 68 times [2018-11-22 22:31:42,566 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:31:42,566 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:31:42,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:42,567 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 22:31:42,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:42,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:31:42,916 INFO L134 CoverageAnalysis]: Checked inductivity of 1191 backedges. 0 proven. 1191 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:42,916 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:31:42,916 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d2376629-fbcd-464c-9034-4bb2cd81db7d/bin-2019/uautomizer/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 22:31:42,924 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-22 22:31:42,949 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-22 22:31:42,949 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:31:42,951 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:31:43,006 INFO L134 CoverageAnalysis]: Checked inductivity of 1191 backedges. 0 proven. 1191 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:43,021 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:31:43,021 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2018-11-22 22:31:43,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-11-22 22:31:43,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-11-22 22:31:43,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=1314, Unknown=0, NotChecked=0, Total=1722 [2018-11-22 22:31:43,022 INFO L87 Difference]: Start difference. First operand 844 states and 1822 transitions. Second operand 42 states. [2018-11-22 22:31:43,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:31:43,673 INFO L93 Difference]: Finished difference Result 1570 states and 3323 transitions. [2018-11-22 22:31:43,673 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-11-22 22:31:43,673 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 165 [2018-11-22 22:31:43,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:31:43,674 INFO L225 Difference]: With dead ends: 1570 [2018-11-22 22:31:43,674 INFO L226 Difference]: Without dead ends: 1439 [2018-11-22 22:31:43,674 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1132 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1778, Invalid=4542, Unknown=0, NotChecked=0, Total=6320 [2018-11-22 22:31:43,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1439 states. [2018-11-22 22:31:43,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1439 to 1439. [2018-11-22 22:31:43,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1439 states. [2018-11-22 22:31:43,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1439 states to 1439 states and 3012 transitions. [2018-11-22 22:31:43,682 INFO L78 Accepts]: Start accepts. Automaton has 1439 states and 3012 transitions. Word has length 165 [2018-11-22 22:31:43,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:31:43,682 INFO L480 AbstractCegarLoop]: Abstraction has 1439 states and 3012 transitions. [2018-11-22 22:31:43,682 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-11-22 22:31:43,682 INFO L276 IsEmpty]: Start isEmpty. Operand 1439 states and 3012 transitions. [2018-11-22 22:31:43,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2018-11-22 22:31:43,683 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:31:43,683 INFO L402 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 22:31:43,684 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:31:43,684 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:31:43,684 INFO L82 PathProgramCache]: Analyzing trace with hash 715831466, now seen corresponding path program 69 times [2018-11-22 22:31:43,684 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:31:43,684 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:31:43,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:43,684 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:31:43,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:43,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:31:44,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:44,043 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:31:44,043 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d2376629-fbcd-464c-9034-4bb2cd81db7d/bin-2019/uautomizer/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 22:31:44,063 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-22 22:31:44,114 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2018-11-22 22:31:44,114 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:31:44,116 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:31:44,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:44,162 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:31:44,162 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2018-11-22 22:31:44,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-11-22 22:31:44,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-11-22 22:31:44,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=428, Invalid=1378, Unknown=0, NotChecked=0, Total=1806 [2018-11-22 22:31:44,163 INFO L87 Difference]: Start difference. First operand 1439 states and 3012 transitions. Second operand 43 states. [2018-11-22 22:31:44,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:31:44,824 INFO L93 Difference]: Finished difference Result 1586 states and 3355 transitions. [2018-11-22 22:31:44,824 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-11-22 22:31:44,824 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 169 [2018-11-22 22:31:44,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:31:44,825 INFO L225 Difference]: With dead ends: 1586 [2018-11-22 22:31:44,825 INFO L226 Difference]: Without dead ends: 1455 [2018-11-22 22:31:44,826 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1238 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1857, Invalid=4785, Unknown=0, NotChecked=0, Total=6642 [2018-11-22 22:31:44,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1455 states. [2018-11-22 22:31:44,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1455 to 860. [2018-11-22 22:31:44,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 860 states. [2018-11-22 22:31:44,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 1854 transitions. [2018-11-22 22:31:44,832 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 1854 transitions. Word has length 169 [2018-11-22 22:31:44,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:31:44,832 INFO L480 AbstractCegarLoop]: Abstraction has 860 states and 1854 transitions. [2018-11-22 22:31:44,832 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-11-22 22:31:44,832 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 1854 transitions. [2018-11-22 22:31:44,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2018-11-22 22:31:44,833 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:31:44,833 INFO L402 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 22:31:44,833 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:31:44,833 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:31:44,833 INFO L82 PathProgramCache]: Analyzing trace with hash 146219690, now seen corresponding path program 70 times [2018-11-22 22:31:44,833 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:31:44,833 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:31:44,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:44,834 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:31:44,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:44,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:31:45,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:45,187 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:31:45,187 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d2376629-fbcd-464c-9034-4bb2cd81db7d/bin-2019/uautomizer/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 22:31:45,195 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-22 22:31:45,220 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-22 22:31:45,220 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:31:45,222 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:31:45,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:45,274 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:31:45,274 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2018-11-22 22:31:45,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-11-22 22:31:45,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-11-22 22:31:45,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=428, Invalid=1378, Unknown=0, NotChecked=0, Total=1806 [2018-11-22 22:31:45,275 INFO L87 Difference]: Start difference. First operand 860 states and 1854 transitions. Second operand 43 states. [2018-11-22 22:31:45,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:31:45,998 INFO L93 Difference]: Finished difference Result 1602 states and 3387 transitions. [2018-11-22 22:31:45,998 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-11-22 22:31:45,998 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 169 [2018-11-22 22:31:45,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:31:45,999 INFO L225 Difference]: With dead ends: 1602 [2018-11-22 22:31:45,999 INFO L226 Difference]: Without dead ends: 1471 [2018-11-22 22:31:46,000 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1173 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2030, Invalid=4612, Unknown=0, NotChecked=0, Total=6642 [2018-11-22 22:31:46,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1471 states. [2018-11-22 22:31:46,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1471 to 1471. [2018-11-22 22:31:46,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1471 states. [2018-11-22 22:31:46,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1471 states to 1471 states and 3076 transitions. [2018-11-22 22:31:46,008 INFO L78 Accepts]: Start accepts. Automaton has 1471 states and 3076 transitions. Word has length 169 [2018-11-22 22:31:46,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:31:46,008 INFO L480 AbstractCegarLoop]: Abstraction has 1471 states and 3076 transitions. [2018-11-22 22:31:46,008 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-11-22 22:31:46,008 INFO L276 IsEmpty]: Start isEmpty. Operand 1471 states and 3076 transitions. [2018-11-22 22:31:46,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-11-22 22:31:46,009 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:31:46,009 INFO L402 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 22:31:46,009 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:31:46,009 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:31:46,009 INFO L82 PathProgramCache]: Analyzing trace with hash -54767801, now seen corresponding path program 71 times [2018-11-22 22:31:46,009 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:31:46,009 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:31:46,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:46,010 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:31:46,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:46,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:31:46,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1333 backedges. 0 proven. 1333 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:46,390 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:31:46,390 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d2376629-fbcd-464c-9034-4bb2cd81db7d/bin-2019/uautomizer/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 22:31:46,399 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-22 22:31:46,433 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2018-11-22 22:31:46,433 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:31:46,435 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:31:46,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1333 backedges. 0 proven. 1333 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:46,482 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:31:46,483 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2018-11-22 22:31:46,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-11-22 22:31:46,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-11-22 22:31:46,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=449, Invalid=1443, Unknown=0, NotChecked=0, Total=1892 [2018-11-22 22:31:46,483 INFO L87 Difference]: Start difference. First operand 1471 states and 3076 transitions. Second operand 44 states. [2018-11-22 22:31:47,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:31:47,223 INFO L93 Difference]: Finished difference Result 1618 states and 3419 transitions. [2018-11-22 22:31:47,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-11-22 22:31:47,223 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 173 [2018-11-22 22:31:47,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:31:47,224 INFO L225 Difference]: With dead ends: 1618 [2018-11-22 22:31:47,224 INFO L226 Difference]: Without dead ends: 1487 [2018-11-22 22:31:47,225 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1331 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2131, Invalid=4841, Unknown=0, NotChecked=0, Total=6972 [2018-11-22 22:31:47,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1487 states. [2018-11-22 22:31:47,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1487 to 876. [2018-11-22 22:31:47,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 876 states. [2018-11-22 22:31:47,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 1886 transitions. [2018-11-22 22:31:47,232 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 1886 transitions. Word has length 173 [2018-11-22 22:31:47,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:31:47,232 INFO L480 AbstractCegarLoop]: Abstraction has 876 states and 1886 transitions. [2018-11-22 22:31:47,232 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-11-22 22:31:47,232 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 1886 transitions. [2018-11-22 22:31:47,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-11-22 22:31:47,232 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:31:47,233 INFO L402 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 22:31:47,233 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:31:47,233 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:31:47,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1762147693, now seen corresponding path program 72 times [2018-11-22 22:31:47,233 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:31:47,233 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:31:47,233 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:47,234 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:31:47,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:47,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:31:47,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1333 backedges. 0 proven. 1333 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:47,681 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:31:47,681 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d2376629-fbcd-464c-9034-4bb2cd81db7d/bin-2019/uautomizer/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 22:31:47,691 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-22 22:31:47,735 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2018-11-22 22:31:47,735 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:31:47,737 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:31:47,770 INFO L134 CoverageAnalysis]: Checked inductivity of 1333 backedges. 0 proven. 1333 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:47,784 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:31:47,784 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2018-11-22 22:31:47,785 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-11-22 22:31:47,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-11-22 22:31:47,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=449, Invalid=1443, Unknown=0, NotChecked=0, Total=1892 [2018-11-22 22:31:47,785 INFO L87 Difference]: Start difference. First operand 876 states and 1886 transitions. Second operand 44 states. [2018-11-22 22:31:48,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:31:48,498 INFO L93 Difference]: Finished difference Result 1634 states and 3451 transitions. [2018-11-22 22:31:48,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-11-22 22:31:48,498 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 173 [2018-11-22 22:31:48,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:31:48,500 INFO L225 Difference]: With dead ends: 1634 [2018-11-22 22:31:48,500 INFO L226 Difference]: Without dead ends: 1503 [2018-11-22 22:31:48,500 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1252 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1961, Invalid=5011, Unknown=0, NotChecked=0, Total=6972 [2018-11-22 22:31:48,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1503 states. [2018-11-22 22:31:48,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1503 to 1503. [2018-11-22 22:31:48,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1503 states. [2018-11-22 22:31:48,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1503 states to 1503 states and 3140 transitions. [2018-11-22 22:31:48,510 INFO L78 Accepts]: Start accepts. Automaton has 1503 states and 3140 transitions. Word has length 173 [2018-11-22 22:31:48,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:31:48,510 INFO L480 AbstractCegarLoop]: Abstraction has 1503 states and 3140 transitions. [2018-11-22 22:31:48,510 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-11-22 22:31:48,511 INFO L276 IsEmpty]: Start isEmpty. Operand 1503 states and 3140 transitions. [2018-11-22 22:31:48,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2018-11-22 22:31:48,512 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:31:48,512 INFO L402 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 22:31:48,512 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:31:48,512 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:31:48,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1195103114, now seen corresponding path program 73 times [2018-11-22 22:31:48,513 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:31:48,513 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:31:48,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:48,514 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:31:48,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:48,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:31:48,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:48,913 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:31:48,913 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d2376629-fbcd-464c-9034-4bb2cd81db7d/bin-2019/uautomizer/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 22:31:48,919 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 22:31:48,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:31:48,946 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:31:48,983 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:48,997 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:31:48,998 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2018-11-22 22:31:48,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-11-22 22:31:48,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-11-22 22:31:48,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=1510, Unknown=0, NotChecked=0, Total=1980 [2018-11-22 22:31:48,998 INFO L87 Difference]: Start difference. First operand 1503 states and 3140 transitions. Second operand 45 states. [2018-11-22 22:31:49,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:31:49,761 INFO L93 Difference]: Finished difference Result 1650 states and 3483 transitions. [2018-11-22 22:31:49,762 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-11-22 22:31:49,762 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 177 [2018-11-22 22:31:49,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:31:49,763 INFO L225 Difference]: With dead ends: 1650 [2018-11-22 22:31:49,763 INFO L226 Difference]: Without dead ends: 1519 [2018-11-22 22:31:49,764 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1398 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2273, Invalid=5037, Unknown=0, NotChecked=0, Total=7310 [2018-11-22 22:31:49,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1519 states. [2018-11-22 22:31:49,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1519 to 892. [2018-11-22 22:31:49,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 892 states. [2018-11-22 22:31:49,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 1918 transitions. [2018-11-22 22:31:49,772 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 1918 transitions. Word has length 177 [2018-11-22 22:31:49,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:31:49,772 INFO L480 AbstractCegarLoop]: Abstraction has 892 states and 1918 transitions. [2018-11-22 22:31:49,772 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-11-22 22:31:49,772 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 1918 transitions. [2018-11-22 22:31:49,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2018-11-22 22:31:49,773 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:31:49,773 INFO L402 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 22:31:49,774 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:31:49,774 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:31:49,774 INFO L82 PathProgramCache]: Analyzing trace with hash 326351498, now seen corresponding path program 74 times [2018-11-22 22:31:49,774 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:31:49,774 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:31:49,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:49,775 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 22:31:49,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:49,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:31:50,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:50,166 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:31:50,166 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d2376629-fbcd-464c-9034-4bb2cd81db7d/bin-2019/uautomizer/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 22:31:50,174 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-22 22:31:50,199 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-22 22:31:50,199 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:31:50,201 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:31:50,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:50,253 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:31:50,253 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2018-11-22 22:31:50,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-11-22 22:31:50,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-11-22 22:31:50,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=1510, Unknown=0, NotChecked=0, Total=1980 [2018-11-22 22:31:50,254 INFO L87 Difference]: Start difference. First operand 892 states and 1918 transitions. Second operand 45 states. [2018-11-22 22:31:51,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:31:51,049 INFO L93 Difference]: Finished difference Result 1666 states and 3515 transitions. [2018-11-22 22:31:51,050 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-11-22 22:31:51,050 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 177 [2018-11-22 22:31:51,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:31:51,051 INFO L225 Difference]: With dead ends: 1666 [2018-11-22 22:31:51,051 INFO L226 Difference]: Without dead ends: 1535 [2018-11-22 22:31:51,051 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1295 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2236, Invalid=5074, Unknown=0, NotChecked=0, Total=7310 [2018-11-22 22:31:51,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1535 states. [2018-11-22 22:31:51,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1535 to 1535. [2018-11-22 22:31:51,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1535 states. [2018-11-22 22:31:51,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1535 states to 1535 states and 3204 transitions. [2018-11-22 22:31:51,061 INFO L78 Accepts]: Start accepts. Automaton has 1535 states and 3204 transitions. Word has length 177 [2018-11-22 22:31:51,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:31:51,061 INFO L480 AbstractCegarLoop]: Abstraction has 1535 states and 3204 transitions. [2018-11-22 22:31:51,061 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-11-22 22:31:51,061 INFO L276 IsEmpty]: Start isEmpty. Operand 1535 states and 3204 transitions. [2018-11-22 22:31:51,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2018-11-22 22:31:51,063 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:31:51,063 INFO L402 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 22:31:51,063 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:31:51,063 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:31:51,063 INFO L82 PathProgramCache]: Analyzing trace with hash -477824473, now seen corresponding path program 75 times [2018-11-22 22:31:51,063 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:31:51,063 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:31:51,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:51,064 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:31:51,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:51,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:31:51,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 1425 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:51,603 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:31:51,603 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d2376629-fbcd-464c-9034-4bb2cd81db7d/bin-2019/uautomizer/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 22:31:51,612 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-22 22:31:51,668 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-11-22 22:31:51,668 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:31:51,671 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:31:51,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 1483 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:51,720 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-22 22:31:51,720 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [43] imperfect sequences [43] total 45 [2018-11-22 22:31:51,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-11-22 22:31:51,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-11-22 22:31:51,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=489, Invalid=1491, Unknown=0, NotChecked=0, Total=1980 [2018-11-22 22:31:51,720 INFO L87 Difference]: Start difference. First operand 1535 states and 3204 transitions. Second operand 45 states. [2018-11-22 22:31:52,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:31:52,262 INFO L93 Difference]: Finished difference Result 13619 states and 27026 transitions. [2018-11-22 22:31:52,262 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-11-22 22:31:52,263 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 181 [2018-11-22 22:31:52,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:31:52,263 INFO L225 Difference]: With dead ends: 13619 [2018-11-22 22:31:52,263 INFO L226 Difference]: Without dead ends: 887 [2018-11-22 22:31:52,264 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1234 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2135, Invalid=5005, Unknown=0, NotChecked=0, Total=7140 [2018-11-22 22:31:52,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 887 states. [2018-11-22 22:31:52,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 887 to 887. [2018-11-22 22:31:52,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 887 states. [2018-11-22 22:31:52,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 1797 transitions. [2018-11-22 22:31:52,270 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 1797 transitions. Word has length 181 [2018-11-22 22:31:52,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:31:52,270 INFO L480 AbstractCegarLoop]: Abstraction has 887 states and 1797 transitions. [2018-11-22 22:31:52,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-11-22 22:31:52,270 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 1797 transitions. [2018-11-22 22:31:52,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2018-11-22 22:31:52,271 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:31:52,271 INFO L402 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 22:31:52,271 INFO L423 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:31:52,271 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:31:52,271 INFO L82 PathProgramCache]: Analyzing trace with hash 301327693, now seen corresponding path program 76 times [2018-11-22 22:31:52,271 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:31:52,271 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:31:52,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:52,272 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:31:52,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:31:52,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:31:52,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 1352 proven. 131 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:52,708 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:31:52,708 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d2376629-fbcd-464c-9034-4bb2cd81db7d/bin-2019/uautomizer/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 22:31:52,718 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-22 22:31:52,743 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-22 22:31:52,743 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:31:52,745 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:31:52,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 1483 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:31:52,800 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-22 22:31:52,800 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [43] imperfect sequences [43] total 45 [2018-11-22 22:31:52,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-11-22 22:31:52,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-11-22 22:31:52,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=489, Invalid=1491, Unknown=0, NotChecked=0, Total=1980 [2018-11-22 22:31:52,801 INFO L87 Difference]: Start difference. First operand 887 states and 1797 transitions. Second operand 45 states. [2018-11-22 22:31:53,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:31:53,340 INFO L93 Difference]: Finished difference Result 6923 states and 12825 transitions. [2018-11-22 22:31:53,340 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-11-22 22:31:53,340 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 181 [2018-11-22 22:31:53,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:31:53,341 INFO L225 Difference]: With dead ends: 6923 [2018-11-22 22:31:53,341 INFO L226 Difference]: Without dead ends: 0 [2018-11-22 22:31:53,341 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1234 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2135, Invalid=5005, Unknown=0, NotChecked=0, Total=7140 [2018-11-22 22:31:53,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-22 22:31:53,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-22 22:31:53,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-22 22:31:53,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-22 22:31:53,341 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 181 [2018-11-22 22:31:53,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:31:53,342 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-22 22:31:53,342 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-11-22 22:31:53,342 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-22 22:31:53,342 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-22 22:31:53,344 INFO L305 ceAbstractionStarter]: Did not count any witness invariants because Icfg is not BoogieIcfg [2018-11-22 22:31:53,345 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 10:31:53 BasicIcfg [2018-11-22 22:31:53,345 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-22 22:31:53,345 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-22 22:31:53,345 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-22 22:31:53,345 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-22 22:31:53,346 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 10:31:01" (3/4) ... [2018-11-22 22:31:53,348 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-22 22:31:53,353 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure t1 [2018-11-22 22:31:53,354 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure t2 [2018-11-22 22:31:53,356 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2018-11-22 22:31:53,356 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2018-11-22 22:31:53,356 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-22 22:31:53,381 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_d2376629-fbcd-464c-9034-4bb2cd81db7d/bin-2019/uautomizer/witness.graphml [2018-11-22 22:31:53,381 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-22 22:31:53,382 INFO L168 Benchmark]: Toolchain (without parser) took 52163.86 ms. Allocated memory was 1.0 GB in the beginning and 1.9 GB in the end (delta: 888.1 MB). Free memory was 956.5 MB in the beginning and 904.7 MB in the end (delta: 51.8 MB). Peak memory consumption was 939.9 MB. Max. memory is 11.5 GB. [2018-11-22 22:31:53,382 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-22 22:31:53,383 INFO L168 Benchmark]: CACSL2BoogieTranslator took 336.39 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 146.3 MB). Free memory was 956.5 MB in the beginning and 1.1 GB in the end (delta: -170.3 MB). Peak memory consumption was 34.6 MB. Max. memory is 11.5 GB. [2018-11-22 22:31:53,383 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.16 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: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 11.5 GB. [2018-11-22 22:31:53,383 INFO L168 Benchmark]: Boogie Preprocessor took 15.75 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-22 22:31:53,383 INFO L168 Benchmark]: RCFGBuilder took 267.68 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: 24.8 MB). Peak memory consumption was 24.8 MB. Max. memory is 11.5 GB. [2018-11-22 22:31:53,383 INFO L168 Benchmark]: TraceAbstraction took 51480.13 ms. Allocated memory was 1.2 GB in the beginning and 1.9 GB in the end (delta: 741.9 MB). Free memory was 1.1 GB in the beginning and 904.7 MB in the end (delta: 190.4 MB). Peak memory consumption was 932.3 MB. Max. memory is 11.5 GB. [2018-11-22 22:31:53,383 INFO L168 Benchmark]: Witness Printer took 36.03 ms. Allocated memory is still 1.9 GB. Free memory was 904.7 MB in the beginning and 904.7 MB in the end (delta: 26.0 kB). Peak memory consumption was 26.0 kB. Max. memory is 11.5 GB. [2018-11-22 22:31:53,384 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 336.39 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 146.3 MB). Free memory was 956.5 MB in the beginning and 1.1 GB in the end (delta: -170.3 MB). Peak memory consumption was 34.6 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 25.16 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: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 15.75 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 267.68 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: 24.8 MB). Peak memory consumption was 24.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 51480.13 ms. Allocated memory was 1.2 GB in the beginning and 1.9 GB in the end (delta: 741.9 MB). Free memory was 1.1 GB in the beginning and 904.7 MB in the end (delta: 190.4 MB). Peak memory consumption was 932.3 MB. Max. memory is 11.5 GB. * Witness Printer took 36.03 ms. Allocated memory is still 1.9 GB. Free memory was 904.7 MB in the beginning and 904.7 MB in the end (delta: 26.0 kB). Peak memory consumption was 26.0 kB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 688]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 64 locations, 1 error locations. SAFE Result, 51.4s OverallTime, 82 OverallIterations, 21 TraceHistogramMax, 28.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 5164 SDtfs, 39724 SDslu, 50023 SDs, 0 SdLazy, 9832 SolverSat, 7470 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12027 GetRequests, 8276 SyntacticMatches, 0 SemanticMatches, 3751 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41070 ImplicationChecksByTransitivity, 35.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1535occurred in iteration=80, 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: 0.5s AutomataMinimizationTime, 82 MinimizatonAttempts, 12588 StatesRemovedByMinimization, 39 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.4s SsaConstructionTime, 1.8s SatisfiabilityAnalysisTime, 17.0s InterpolantComputationTime, 16471 NumberOfCodeBlocks, 16471 NumberOfCodeBlocksAsserted, 578 NumberOfCheckSat, 16311 ConstructedInterpolants, 0 QuantifiedInterpolants, 6018555 SizeOfPredicates, 1944 NumberOfNonLiveVariables, 18564 ConjunctsInSsa, 2192 ConjunctsInUnsatCore, 160 InterpolantComputations, 6 PerfectInterpolantSequences, 5743/79120 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...