./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/triangular-longer_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_a63e409a-aa1e-4acd-8ff1-792e7d3d4eef/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_a63e409a-aa1e-4acd-8ff1-792e7d3d4eef/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_a63e409a-aa1e-4acd-8ff1-792e7d3d4eef/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_a63e409a-aa1e-4acd-8ff1-792e7d3d4eef/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/triangular-longer_true-unreach-call.i -s /tmp/vcloud-vcloud-master/worker/working_dir_a63e409a-aa1e-4acd-8ff1-792e7d3d4eef/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_a63e409a-aa1e-4acd-8ff1-792e7d3d4eef/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 37ab50eb35f71bc9dfb317209ba2fdf85cde6398 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 22:08:15,855 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-22 22:08:15,855 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-22 22:08:15,863 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-22 22:08:15,863 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-22 22:08:15,864 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-22 22:08:15,864 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-22 22:08:15,865 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-22 22:08:15,866 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-22 22:08:15,867 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-22 22:08:15,868 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-22 22:08:15,868 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-22 22:08:15,869 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-22 22:08:15,869 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-22 22:08:15,870 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-22 22:08:15,871 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-22 22:08:15,872 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-22 22:08:15,873 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-22 22:08:15,874 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-22 22:08:15,875 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-22 22:08:15,876 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-22 22:08:15,877 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-22 22:08:15,879 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-22 22:08:15,879 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-22 22:08:15,879 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-22 22:08:15,880 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-22 22:08:15,880 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-22 22:08:15,881 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-22 22:08:15,882 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-22 22:08:15,882 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-22 22:08:15,883 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-22 22:08:15,883 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-22 22:08:15,883 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-22 22:08:15,883 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-22 22:08:15,884 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-22 22:08:15,885 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-22 22:08:15,885 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_a63e409a-aa1e-4acd-8ff1-792e7d3d4eef/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-11-22 22:08:15,895 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-22 22:08:15,895 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-22 22:08:15,896 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-22 22:08:15,896 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-11-22 22:08:15,896 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-22 22:08:15,896 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-22 22:08:15,897 INFO L133 SettingsManager]: * Use SBE=true [2018-11-22 22:08:15,897 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-22 22:08:15,897 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-22 22:08:15,897 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-22 22:08:15,897 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-22 22:08:15,897 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-22 22:08:15,897 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-22 22:08:15,897 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-22 22:08:15,897 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-22 22:08:15,898 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-22 22:08:15,898 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-22 22:08:15,898 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-22 22:08:15,898 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-22 22:08:15,898 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-22 22:08:15,898 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-22 22:08:15,898 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-22 22:08:15,899 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-22 22:08:15,899 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-22 22:08:15,899 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-22 22:08:15,899 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-22 22:08:15,899 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-22 22:08:15,899 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-22 22:08:15,899 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-22 22:08:15,899 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-22 22:08:15,899 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_a63e409a-aa1e-4acd-8ff1-792e7d3d4eef/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 -> 37ab50eb35f71bc9dfb317209ba2fdf85cde6398 [2018-11-22 22:08:15,920 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-22 22:08:15,928 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-22 22:08:15,931 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-22 22:08:15,932 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-22 22:08:15,932 INFO L276 PluginConnector]: CDTParser initialized [2018-11-22 22:08:15,932 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_a63e409a-aa1e-4acd-8ff1-792e7d3d4eef/bin-2019/uautomizer/../../sv-benchmarks/c/pthread/triangular-longer_true-unreach-call.i [2018-11-22 22:08:15,969 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_a63e409a-aa1e-4acd-8ff1-792e7d3d4eef/bin-2019/uautomizer/data/ad28dd0d2/f6a962fd881a41a78946cc2ec3796b97/FLAG7f5b291f8 [2018-11-22 22:08:16,414 INFO L307 CDTParser]: Found 1 translation units. [2018-11-22 22:08:16,414 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_a63e409a-aa1e-4acd-8ff1-792e7d3d4eef/sv-benchmarks/c/pthread/triangular-longer_true-unreach-call.i [2018-11-22 22:08:16,427 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_a63e409a-aa1e-4acd-8ff1-792e7d3d4eef/bin-2019/uautomizer/data/ad28dd0d2/f6a962fd881a41a78946cc2ec3796b97/FLAG7f5b291f8 [2018-11-22 22:08:16,441 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_a63e409a-aa1e-4acd-8ff1-792e7d3d4eef/bin-2019/uautomizer/data/ad28dd0d2/f6a962fd881a41a78946cc2ec3796b97 [2018-11-22 22:08:16,444 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-22 22:08:16,445 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-22 22:08:16,445 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-22 22:08:16,445 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-22 22:08:16,449 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-22 22:08:16,449 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 10:08:16" (1/1) ... [2018-11-22 22:08:16,452 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a7c0064 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:08:16, skipping insertion in model container [2018-11-22 22:08:16,452 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 10:08:16" (1/1) ... [2018-11-22 22:08:16,462 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-22 22:08:16,494 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-22 22:08:16,712 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-22 22:08:16,719 INFO L191 MainTranslator]: Completed pre-run [2018-11-22 22:08:16,801 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-22 22:08:16,831 INFO L195 MainTranslator]: Completed translation [2018-11-22 22:08:16,831 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:08:16 WrapperNode [2018-11-22 22:08:16,831 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-22 22:08:16,832 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-22 22:08:16,832 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-22 22:08:16,832 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-22 22:08:16,837 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:08:16" (1/1) ... [2018-11-22 22:08:16,849 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:08:16" (1/1) ... [2018-11-22 22:08:16,861 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-22 22:08:16,862 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-22 22:08:16,862 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-22 22:08:16,862 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-22 22:08:16,867 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:08:16" (1/1) ... [2018-11-22 22:08:16,867 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:08:16" (1/1) ... [2018-11-22 22:08:16,868 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:08:16" (1/1) ... [2018-11-22 22:08:16,869 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:08:16" (1/1) ... [2018-11-22 22:08:16,872 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:08:16" (1/1) ... [2018-11-22 22:08:16,874 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:08:16" (1/1) ... [2018-11-22 22:08:16,875 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:08:16" (1/1) ... [2018-11-22 22:08:16,877 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-22 22:08:16,877 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-22 22:08:16,877 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-22 22:08:16,877 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-22 22:08:16,878 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:08:16" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a63e409a-aa1e-4acd-8ff1-792e7d3d4eef/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 22:08:16,911 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-11-22 22:08:16,911 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2018-11-22 22:08:16,911 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2018-11-22 22:08:16,911 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2018-11-22 22:08:16,912 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2018-11-22 22:08:16,912 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-11-22 22:08:16,912 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2018-11-22 22:08:16,912 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-11-22 22:08:16,912 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2018-11-22 22:08:16,912 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-22 22:08:16,912 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-22 22:08:16,913 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 22:08:17,105 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-22 22:08:17,105 INFO L280 CfgBuilder]: Removed 6 assue(true) statements. [2018-11-22 22:08:17,105 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 10:08:17 BoogieIcfgContainer [2018-11-22 22:08:17,106 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-22 22:08:17,106 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-22 22:08:17,106 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-22 22:08:17,109 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-22 22:08:17,109 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 10:08:16" (1/3) ... [2018-11-22 22:08:17,109 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d7f36cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 10:08:17, skipping insertion in model container [2018-11-22 22:08:17,109 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:08:16" (2/3) ... [2018-11-22 22:08:17,110 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d7f36cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 10:08:17, skipping insertion in model container [2018-11-22 22:08:17,110 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 10:08:17" (3/3) ... [2018-11-22 22:08:17,111 INFO L112 eAbstractionObserver]: Analyzing ICFG triangular-longer_true-unreach-call.i [2018-11-22 22:08:17,131 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-22 22:08:17,131 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-22 22:08:17,132 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-22 22:08:17,132 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-22 22:08:17,132 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-22 22:08:17,132 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-22 22:08:17,132 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-22 22:08:17,133 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-22 22:08:17,133 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-22 22:08:17,133 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-22 22:08:17,133 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-22 22:08:17,133 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-22 22:08:17,133 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-22 22:08:17,134 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-22 22:08:17,134 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-22 22:08:17,134 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-22 22:08:17,134 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-22 22:08:17,134 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-22 22:08:17,134 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-22 22:08:17,135 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-22 22:08:17,135 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-22 22:08:17,135 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-22 22:08:17,135 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-22 22:08:17,135 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-22 22:08:17,135 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-22 22:08:17,135 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-22 22:08:17,135 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-22 22:08:17,135 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-22 22:08:17,147 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2018-11-22 22:08:17,147 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-22 22:08:17,153 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-22 22:08:17,164 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-22 22:08:17,179 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-22 22:08:17,180 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-22 22:08:17,180 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-22 22:08:17,180 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-22 22:08:17,180 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-22 22:08:17,180 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-22 22:08:17,180 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-22 22:08:17,180 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-22 22:08:17,180 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-22 22:08:17,187 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 46places, 48 transitions [2018-11-22 22:08:17,228 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 1012 states. [2018-11-22 22:08:17,229 INFO L276 IsEmpty]: Start isEmpty. Operand 1012 states. [2018-11-22 22:08:17,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-11-22 22:08:17,236 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:08:17,237 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 22:08:17,238 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:08:17,241 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:08:17,242 INFO L82 PathProgramCache]: Analyzing trace with hash 573491188, now seen corresponding path program 1 times [2018-11-22 22:08:17,243 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:08:17,243 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:08:17,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:08:17,282 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 22:08:17,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:08:17,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:08:17,417 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 22:08:17,420 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-22 22:08:17,420 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-22 22:08:17,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-22 22:08:17,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-22 22:08:17,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-11-22 22:08:17,438 INFO L87 Difference]: Start difference. First operand 1012 states. Second operand 5 states. [2018-11-22 22:08:17,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:08:17,542 INFO L93 Difference]: Finished difference Result 1411 states and 4051 transitions. [2018-11-22 22:08:17,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-22 22:08:17,543 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2018-11-22 22:08:17,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:08:17,555 INFO L225 Difference]: With dead ends: 1411 [2018-11-22 22:08:17,555 INFO L226 Difference]: Without dead ends: 322 [2018-11-22 22:08:17,556 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 22:08:17,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2018-11-22 22:08:17,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 322. [2018-11-22 22:08:17,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 322 states. [2018-11-22 22:08:17,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 820 transitions. [2018-11-22 22:08:17,598 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 820 transitions. Word has length 19 [2018-11-22 22:08:17,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:08:17,598 INFO L480 AbstractCegarLoop]: Abstraction has 322 states and 820 transitions. [2018-11-22 22:08:17,599 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-22 22:08:17,599 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 820 transitions. [2018-11-22 22:08:17,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-11-22 22:08:17,599 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:08:17,600 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 22:08:17,600 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:08:17,600 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:08:17,600 INFO L82 PathProgramCache]: Analyzing trace with hash -158111408, now seen corresponding path program 1 times [2018-11-22 22:08:17,600 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:08:17,601 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:08:17,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:08:17,605 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 22:08:17,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:08:17,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:08:17,673 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 22:08:17,673 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-22 22:08:17,673 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-22 22:08:17,674 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-22 22:08:17,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-22 22:08:17,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-11-22 22:08:17,675 INFO L87 Difference]: Start difference. First operand 322 states and 820 transitions. Second operand 5 states. [2018-11-22 22:08:17,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:08:17,704 INFO L93 Difference]: Finished difference Result 411 states and 998 transitions. [2018-11-22 22:08:17,705 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-22 22:08:17,705 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2018-11-22 22:08:17,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:08:17,708 INFO L225 Difference]: With dead ends: 411 [2018-11-22 22:08:17,708 INFO L226 Difference]: Without dead ends: 290 [2018-11-22 22:08:17,709 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 22:08:17,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2018-11-22 22:08:17,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 290. [2018-11-22 22:08:17,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 290 states. [2018-11-22 22:08:17,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 714 transitions. [2018-11-22 22:08:17,720 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 714 transitions. Word has length 22 [2018-11-22 22:08:17,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:08:17,721 INFO L480 AbstractCegarLoop]: Abstraction has 290 states and 714 transitions. [2018-11-22 22:08:17,721 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-22 22:08:17,721 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 714 transitions. [2018-11-22 22:08:17,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-11-22 22:08:17,722 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:08:17,722 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 22:08:17,722 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:08:17,722 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:08:17,722 INFO L82 PathProgramCache]: Analyzing trace with hash -1832836244, now seen corresponding path program 1 times [2018-11-22 22:08:17,723 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:08:17,723 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:08:17,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:08:17,726 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 22:08:17,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:08:17,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:08:17,786 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 22:08:17,786 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-22 22:08:17,786 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-22 22:08:17,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-22 22:08:17,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-22 22:08:17,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-11-22 22:08:17,787 INFO L87 Difference]: Start difference. First operand 290 states and 714 transitions. Second operand 6 states. [2018-11-22 22:08:17,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:08:17,832 INFO L93 Difference]: Finished difference Result 437 states and 1057 transitions. [2018-11-22 22:08:17,833 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-22 22:08:17,833 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2018-11-22 22:08:17,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:08:17,834 INFO L225 Difference]: With dead ends: 437 [2018-11-22 22:08:17,834 INFO L226 Difference]: Without dead ends: 300 [2018-11-22 22:08:17,835 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 22:08:17,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2018-11-22 22:08:17,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 287. [2018-11-22 22:08:17,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2018-11-22 22:08:17,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 708 transitions. [2018-11-22 22:08:17,846 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 708 transitions. Word has length 25 [2018-11-22 22:08:17,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:08:17,846 INFO L480 AbstractCegarLoop]: Abstraction has 287 states and 708 transitions. [2018-11-22 22:08:17,846 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-22 22:08:17,846 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 708 transitions. [2018-11-22 22:08:17,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-11-22 22:08:17,847 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:08:17,847 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 22:08:17,848 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:08:17,848 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:08:17,848 INFO L82 PathProgramCache]: Analyzing trace with hash 28324926, now seen corresponding path program 2 times [2018-11-22 22:08:17,848 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:08:17,848 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:08:17,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:08:17,851 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 22:08:17,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:08:17,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:08:17,922 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 22:08:17,922 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-22 22:08:17,922 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-22 22:08:17,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-22 22:08:17,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-22 22:08:17,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-11-22 22:08:17,923 INFO L87 Difference]: Start difference. First operand 287 states and 708 transitions. Second operand 6 states. [2018-11-22 22:08:17,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:08:17,968 INFO L93 Difference]: Finished difference Result 447 states and 1077 transitions. [2018-11-22 22:08:17,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-22 22:08:17,968 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2018-11-22 22:08:17,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:08:17,969 INFO L225 Difference]: With dead ends: 447 [2018-11-22 22:08:17,969 INFO L226 Difference]: Without dead ends: 319 [2018-11-22 22:08:17,970 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 22:08:17,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2018-11-22 22:08:17,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 319. [2018-11-22 22:08:17,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2018-11-22 22:08:17,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 772 transitions. [2018-11-22 22:08:17,976 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 772 transitions. Word has length 25 [2018-11-22 22:08:17,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:08:17,976 INFO L480 AbstractCegarLoop]: Abstraction has 319 states and 772 transitions. [2018-11-22 22:08:17,976 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-22 22:08:17,976 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 772 transitions. [2018-11-22 22:08:17,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-11-22 22:08:17,977 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:08:17,978 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 22:08:17,978 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:08:17,978 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:08:17,978 INFO L82 PathProgramCache]: Analyzing trace with hash -390066897, now seen corresponding path program 1 times [2018-11-22 22:08:17,978 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:08:17,978 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:08:17,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:08:17,981 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:08:17,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:08:17,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:08:18,056 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 22:08:18,056 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:08:18,056 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a63e409a-aa1e-4acd-8ff1-792e7d3d4eef/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 22:08:18,078 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 22:08:18,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:08:18,103 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:08:18,143 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 22:08:18,168 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:08:18,168 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-11-22 22:08:18,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-22 22:08:18,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-22 22:08:18,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-11-22 22:08:18,169 INFO L87 Difference]: Start difference. First operand 319 states and 772 transitions. Second operand 8 states. [2018-11-22 22:08:18,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:08:18,281 INFO L93 Difference]: Finished difference Result 466 states and 1115 transitions. [2018-11-22 22:08:18,281 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-22 22:08:18,281 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2018-11-22 22:08:18,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:08:18,283 INFO L225 Difference]: With dead ends: 466 [2018-11-22 22:08:18,283 INFO L226 Difference]: Without dead ends: 335 [2018-11-22 22:08:18,283 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2018-11-22 22:08:18,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2018-11-22 22:08:18,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 297. [2018-11-22 22:08:18,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 297 states. [2018-11-22 22:08:18,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 728 transitions. [2018-11-22 22:08:18,292 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 728 transitions. Word has length 29 [2018-11-22 22:08:18,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:08:18,292 INFO L480 AbstractCegarLoop]: Abstraction has 297 states and 728 transitions. [2018-11-22 22:08:18,292 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-22 22:08:18,293 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 728 transitions. [2018-11-22 22:08:18,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-11-22 22:08:18,293 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:08:18,294 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 22:08:18,294 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:08:18,294 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:08:18,294 INFO L82 PathProgramCache]: Analyzing trace with hash -1592611961, now seen corresponding path program 1 times [2018-11-22 22:08:18,294 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:08:18,294 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:08:18,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:08:18,297 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 22:08:18,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:08:18,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:08:18,398 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 22:08:18,399 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:08:18,399 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a63e409a-aa1e-4acd-8ff1-792e7d3d4eef/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 22:08:18,415 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 22:08:18,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:08:18,434 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:08:18,458 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 22:08:18,477 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:08:18,478 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-11-22 22:08:18,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-22 22:08:18,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-22 22:08:18,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-11-22 22:08:18,478 INFO L87 Difference]: Start difference. First operand 297 states and 728 transitions. Second operand 8 states. [2018-11-22 22:08:18,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:08:18,563 INFO L93 Difference]: Finished difference Result 482 states and 1147 transitions. [2018-11-22 22:08:18,564 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-22 22:08:18,564 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2018-11-22 22:08:18,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:08:18,566 INFO L225 Difference]: With dead ends: 482 [2018-11-22 22:08:18,566 INFO L226 Difference]: Without dead ends: 351 [2018-11-22 22:08:18,566 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2018-11-22 22:08:18,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2018-11-22 22:08:18,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 351. [2018-11-22 22:08:18,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351 states. [2018-11-22 22:08:18,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 836 transitions. [2018-11-22 22:08:18,575 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 836 transitions. Word has length 29 [2018-11-22 22:08:18,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:08:18,576 INFO L480 AbstractCegarLoop]: Abstraction has 351 states and 836 transitions. [2018-11-22 22:08:18,576 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-22 22:08:18,576 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 836 transitions. [2018-11-22 22:08:18,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-11-22 22:08:18,577 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:08:18,577 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 22:08:18,581 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:08:18,581 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:08:18,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1331288396, now seen corresponding path program 1 times [2018-11-22 22:08:18,581 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:08:18,582 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:08:18,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:08:18,584 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 22:08:18,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:08:18,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:08:18,657 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 22:08:18,657 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:08:18,658 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a63e409a-aa1e-4acd-8ff1-792e7d3d4eef/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 22:08:18,668 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 22:08:18,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:08:18,688 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:08:18,705 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 22:08:18,738 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:08:18,738 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2018-11-22 22:08:18,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-22 22:08:18,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-22 22:08:18,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2018-11-22 22:08:18,739 INFO L87 Difference]: Start difference. First operand 351 states and 836 transitions. Second operand 9 states. [2018-11-22 22:08:18,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:08:18,838 INFO L93 Difference]: Finished difference Result 498 states and 1179 transitions. [2018-11-22 22:08:18,838 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-22 22:08:18,838 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2018-11-22 22:08:18,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:08:18,840 INFO L225 Difference]: With dead ends: 498 [2018-11-22 22:08:18,840 INFO L226 Difference]: Without dead ends: 367 [2018-11-22 22:08:18,840 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2018-11-22 22:08:18,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2018-11-22 22:08:18,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 313. [2018-11-22 22:08:18,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 313 states. [2018-11-22 22:08:18,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 760 transitions. [2018-11-22 22:08:18,848 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 760 transitions. Word has length 33 [2018-11-22 22:08:18,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:08:18,848 INFO L480 AbstractCegarLoop]: Abstraction has 313 states and 760 transitions. [2018-11-22 22:08:18,848 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-22 22:08:18,848 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 760 transitions. [2018-11-22 22:08:18,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-11-22 22:08:18,848 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:08:18,849 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 22:08:18,849 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:08:18,849 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:08:18,849 INFO L82 PathProgramCache]: Analyzing trace with hash -460714038, now seen corresponding path program 2 times [2018-11-22 22:08:18,849 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:08:18,849 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:08:18,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:08:18,851 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 22:08:18,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:08:18,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:08:18,898 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 22:08:18,898 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:08:18,898 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a63e409a-aa1e-4acd-8ff1-792e7d3d4eef/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 22:08:18,910 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-22 22:08:18,925 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-22 22:08:18,925 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:08:18,927 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:08:18,963 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 22:08:18,978 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:08:18,978 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2018-11-22 22:08:18,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-22 22:08:18,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-22 22:08:18,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2018-11-22 22:08:18,979 INFO L87 Difference]: Start difference. First operand 313 states and 760 transitions. Second operand 9 states. [2018-11-22 22:08:19,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:08:19,061 INFO L93 Difference]: Finished difference Result 514 states and 1211 transitions. [2018-11-22 22:08:19,062 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-22 22:08:19,062 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2018-11-22 22:08:19,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:08:19,063 INFO L225 Difference]: With dead ends: 514 [2018-11-22 22:08:19,063 INFO L226 Difference]: Without dead ends: 383 [2018-11-22 22:08:19,063 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2018-11-22 22:08:19,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2018-11-22 22:08:19,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 383. [2018-11-22 22:08:19,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 383 states. [2018-11-22 22:08:19,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 900 transitions. [2018-11-22 22:08:19,069 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 900 transitions. Word has length 33 [2018-11-22 22:08:19,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:08:19,069 INFO L480 AbstractCegarLoop]: Abstraction has 383 states and 900 transitions. [2018-11-22 22:08:19,069 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-22 22:08:19,069 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 900 transitions. [2018-11-22 22:08:19,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-11-22 22:08:19,070 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:08:19,070 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 22:08:19,070 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:08:19,071 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:08:19,071 INFO L82 PathProgramCache]: Analyzing trace with hash -1672817905, now seen corresponding path program 3 times [2018-11-22 22:08:19,071 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:08:19,071 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:08:19,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:08:19,073 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:08:19,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:08:19,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:08:19,140 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 22:08:19,141 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:08:19,141 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a63e409a-aa1e-4acd-8ff1-792e7d3d4eef/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 22:08:19,160 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-22 22:08:19,202 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-11-22 22:08:19,202 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:08:19,205 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:08:19,256 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 22:08:19,272 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:08:19,272 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2018-11-22 22:08:19,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-22 22:08:19,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-22 22:08:19,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2018-11-22 22:08:19,273 INFO L87 Difference]: Start difference. First operand 383 states and 900 transitions. Second operand 10 states. [2018-11-22 22:08:19,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:08:19,364 INFO L93 Difference]: Finished difference Result 530 states and 1243 transitions. [2018-11-22 22:08:19,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-22 22:08:19,365 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2018-11-22 22:08:19,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:08:19,367 INFO L225 Difference]: With dead ends: 530 [2018-11-22 22:08:19,367 INFO L226 Difference]: Without dead ends: 399 [2018-11-22 22:08:19,367 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2018-11-22 22:08:19,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2018-11-22 22:08:19,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 329. [2018-11-22 22:08:19,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 329 states. [2018-11-22 22:08:19,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 792 transitions. [2018-11-22 22:08:19,374 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 792 transitions. Word has length 37 [2018-11-22 22:08:19,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:08:19,375 INFO L480 AbstractCegarLoop]: Abstraction has 329 states and 792 transitions. [2018-11-22 22:08:19,375 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-22 22:08:19,375 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 792 transitions. [2018-11-22 22:08:19,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-11-22 22:08:19,375 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:08:19,376 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 22:08:19,376 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:08:19,376 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:08:19,376 INFO L82 PathProgramCache]: Analyzing trace with hash 2061178471, now seen corresponding path program 4 times [2018-11-22 22:08:19,376 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:08:19,376 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:08:19,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:08:19,378 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:08:19,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:08:19,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:08:19,435 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 22:08:19,435 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:08:19,435 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a63e409a-aa1e-4acd-8ff1-792e7d3d4eef/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 22:08:19,447 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-22 22:08:19,460 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-22 22:08:19,461 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:08:19,462 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:08:19,481 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 22:08:19,497 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:08:19,497 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2018-11-22 22:08:19,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-22 22:08:19,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-22 22:08:19,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2018-11-22 22:08:19,498 INFO L87 Difference]: Start difference. First operand 329 states and 792 transitions. Second operand 10 states. [2018-11-22 22:08:19,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:08:19,566 INFO L93 Difference]: Finished difference Result 546 states and 1275 transitions. [2018-11-22 22:08:19,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-22 22:08:19,566 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2018-11-22 22:08:19,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:08:19,567 INFO L225 Difference]: With dead ends: 546 [2018-11-22 22:08:19,567 INFO L226 Difference]: Without dead ends: 415 [2018-11-22 22:08:19,567 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 22:08:19,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2018-11-22 22:08:19,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 415. [2018-11-22 22:08:19,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 415 states. [2018-11-22 22:08:19,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 964 transitions. [2018-11-22 22:08:19,573 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 964 transitions. Word has length 37 [2018-11-22 22:08:19,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:08:19,573 INFO L480 AbstractCegarLoop]: Abstraction has 415 states and 964 transitions. [2018-11-22 22:08:19,573 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-22 22:08:19,573 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 964 transitions. [2018-11-22 22:08:19,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-11-22 22:08:19,574 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:08:19,574 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 22:08:19,574 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:08:19,575 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:08:19,575 INFO L82 PathProgramCache]: Analyzing trace with hash 307146540, now seen corresponding path program 5 times [2018-11-22 22:08:19,575 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:08:19,575 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:08:19,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:08:19,577 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:08:19,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:08:19,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:08:19,641 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 22:08:19,641 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:08:19,641 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a63e409a-aa1e-4acd-8ff1-792e7d3d4eef/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 22:08:19,649 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-22 22:08:19,660 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2018-11-22 22:08:19,660 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:08:19,662 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:08:19,682 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 22:08:19,698 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:08:19,698 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2018-11-22 22:08:19,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-22 22:08:19,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-22 22:08:19,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2018-11-22 22:08:19,699 INFO L87 Difference]: Start difference. First operand 415 states and 964 transitions. Second operand 11 states. [2018-11-22 22:08:19,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:08:19,808 INFO L93 Difference]: Finished difference Result 562 states and 1307 transitions. [2018-11-22 22:08:19,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-22 22:08:19,808 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2018-11-22 22:08:19,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:08:19,809 INFO L225 Difference]: With dead ends: 562 [2018-11-22 22:08:19,809 INFO L226 Difference]: Without dead ends: 431 [2018-11-22 22:08:19,810 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2018-11-22 22:08:19,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2018-11-22 22:08:19,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 345. [2018-11-22 22:08:19,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 345 states. [2018-11-22 22:08:19,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 824 transitions. [2018-11-22 22:08:19,814 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 824 transitions. Word has length 41 [2018-11-22 22:08:19,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:08:19,815 INFO L480 AbstractCegarLoop]: Abstraction has 345 states and 824 transitions. [2018-11-22 22:08:19,815 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-22 22:08:19,815 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 824 transitions. [2018-11-22 22:08:19,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-11-22 22:08:19,815 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:08:19,816 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 22:08:19,816 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:08:19,816 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:08:19,816 INFO L82 PathProgramCache]: Analyzing trace with hash 2086800042, now seen corresponding path program 6 times [2018-11-22 22:08:19,816 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:08:19,816 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:08:19,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:08:19,818 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:08:19,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:08:19,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:08:19,881 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 22:08:19,881 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:08:19,881 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a63e409a-aa1e-4acd-8ff1-792e7d3d4eef/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 22:08:19,890 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-22 22:08:19,902 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2018-11-22 22:08:19,903 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:08:19,904 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:08:19,917 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 22:08:19,935 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:08:19,935 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2018-11-22 22:08:19,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-22 22:08:19,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-22 22:08:19,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2018-11-22 22:08:19,936 INFO L87 Difference]: Start difference. First operand 345 states and 824 transitions. Second operand 11 states. [2018-11-22 22:08:20,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:08:20,026 INFO L93 Difference]: Finished difference Result 578 states and 1339 transitions. [2018-11-22 22:08:20,027 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-22 22:08:20,027 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2018-11-22 22:08:20,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:08:20,028 INFO L225 Difference]: With dead ends: 578 [2018-11-22 22:08:20,028 INFO L226 Difference]: Without dead ends: 447 [2018-11-22 22:08:20,028 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2018-11-22 22:08:20,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2018-11-22 22:08:20,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 447. [2018-11-22 22:08:20,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 447 states. [2018-11-22 22:08:20,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 1028 transitions. [2018-11-22 22:08:20,036 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 1028 transitions. Word has length 41 [2018-11-22 22:08:20,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:08:20,036 INFO L480 AbstractCegarLoop]: Abstraction has 447 states and 1028 transitions. [2018-11-22 22:08:20,036 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-22 22:08:20,036 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 1028 transitions. [2018-11-22 22:08:20,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-11-22 22:08:20,037 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:08:20,037 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 22:08:20,037 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:08:20,037 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:08:20,037 INFO L82 PathProgramCache]: Analyzing trace with hash -1960724241, now seen corresponding path program 7 times [2018-11-22 22:08:20,037 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:08:20,037 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:08:20,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:08:20,039 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:08:20,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:08:20,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:08:20,116 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 22:08:20,116 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:08:20,116 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a63e409a-aa1e-4acd-8ff1-792e7d3d4eef/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 22:08:20,124 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 22:08:20,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:08:20,138 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:08:20,158 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 22:08:20,174 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:08:20,174 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2018-11-22 22:08:20,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-22 22:08:20,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-22 22:08:20,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2018-11-22 22:08:20,175 INFO L87 Difference]: Start difference. First operand 447 states and 1028 transitions. Second operand 12 states. [2018-11-22 22:08:20,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:08:20,271 INFO L93 Difference]: Finished difference Result 594 states and 1371 transitions. [2018-11-22 22:08:20,271 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-22 22:08:20,271 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 45 [2018-11-22 22:08:20,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:08:20,273 INFO L225 Difference]: With dead ends: 594 [2018-11-22 22:08:20,273 INFO L226 Difference]: Without dead ends: 463 [2018-11-22 22:08:20,273 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2018-11-22 22:08:20,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2018-11-22 22:08:20,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 361. [2018-11-22 22:08:20,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 361 states. [2018-11-22 22:08:20,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 856 transitions. [2018-11-22 22:08:20,278 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 856 transitions. Word has length 45 [2018-11-22 22:08:20,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:08:20,278 INFO L480 AbstractCegarLoop]: Abstraction has 361 states and 856 transitions. [2018-11-22 22:08:20,278 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-22 22:08:20,278 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 856 transitions. [2018-11-22 22:08:20,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-11-22 22:08:20,279 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:08:20,279 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 22:08:20,279 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:08:20,279 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:08:20,279 INFO L82 PathProgramCache]: Analyzing trace with hash 511353159, now seen corresponding path program 8 times [2018-11-22 22:08:20,279 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:08:20,279 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:08:20,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:08:20,281 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 22:08:20,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:08:20,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:08:20,330 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 22:08:20,330 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:08:20,330 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a63e409a-aa1e-4acd-8ff1-792e7d3d4eef/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 22:08:20,347 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-22 22:08:20,372 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-22 22:08:20,372 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:08:20,373 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:08:20,396 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 22:08:20,411 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:08:20,412 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2018-11-22 22:08:20,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-22 22:08:20,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-22 22:08:20,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2018-11-22 22:08:20,412 INFO L87 Difference]: Start difference. First operand 361 states and 856 transitions. Second operand 12 states. [2018-11-22 22:08:20,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:08:20,508 INFO L93 Difference]: Finished difference Result 610 states and 1403 transitions. [2018-11-22 22:08:20,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-22 22:08:20,508 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 45 [2018-11-22 22:08:20,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:08:20,509 INFO L225 Difference]: With dead ends: 610 [2018-11-22 22:08:20,509 INFO L226 Difference]: Without dead ends: 479 [2018-11-22 22:08:20,509 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2018-11-22 22:08:20,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2018-11-22 22:08:20,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 479. [2018-11-22 22:08:20,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 479 states. [2018-11-22 22:08:20,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 1092 transitions. [2018-11-22 22:08:20,517 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 1092 transitions. Word has length 45 [2018-11-22 22:08:20,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:08:20,517 INFO L480 AbstractCegarLoop]: Abstraction has 479 states and 1092 transitions. [2018-11-22 22:08:20,517 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-22 22:08:20,518 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 1092 transitions. [2018-11-22 22:08:20,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-11-22 22:08:20,518 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:08:20,518 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 22:08:20,519 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:08:20,519 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:08:20,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1300210956, now seen corresponding path program 9 times [2018-11-22 22:08:20,519 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:08:20,519 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:08:20,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:08:20,521 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:08:20,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:08:20,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:08:20,626 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 22:08:20,626 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:08:20,627 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a63e409a-aa1e-4acd-8ff1-792e7d3d4eef/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 22:08:20,634 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-22 22:08:20,647 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-11-22 22:08:20,647 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:08:20,649 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:08:20,672 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 22:08:20,691 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:08:20,691 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2018-11-22 22:08:20,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-22 22:08:20,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-22 22:08:20,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2018-11-22 22:08:20,692 INFO L87 Difference]: Start difference. First operand 479 states and 1092 transitions. Second operand 13 states. [2018-11-22 22:08:20,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:08:20,830 INFO L93 Difference]: Finished difference Result 626 states and 1435 transitions. [2018-11-22 22:08:20,831 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-22 22:08:20,831 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2018-11-22 22:08:20,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:08:20,832 INFO L225 Difference]: With dead ends: 626 [2018-11-22 22:08:20,832 INFO L226 Difference]: Without dead ends: 495 [2018-11-22 22:08:20,833 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 22:08:20,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2018-11-22 22:08:20,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 377. [2018-11-22 22:08:20,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 377 states. [2018-11-22 22:08:20,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 888 transitions. [2018-11-22 22:08:20,838 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 888 transitions. Word has length 49 [2018-11-22 22:08:20,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:08:20,839 INFO L480 AbstractCegarLoop]: Abstraction has 377 states and 888 transitions. [2018-11-22 22:08:20,839 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-22 22:08:20,839 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 888 transitions. [2018-11-22 22:08:20,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-11-22 22:08:20,839 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:08:20,840 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 22:08:20,840 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:08:20,840 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:08:20,840 INFO L82 PathProgramCache]: Analyzing trace with hash -578738806, now seen corresponding path program 10 times [2018-11-22 22:08:20,840 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:08:20,840 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:08:20,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:08:20,842 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:08:20,842 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:08:20,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:08:20,901 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:08:20,901 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:08:20,901 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a63e409a-aa1e-4acd-8ff1-792e7d3d4eef/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 22:08:20,920 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-22 22:08:20,933 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-22 22:08:20,933 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:08:20,934 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:08:20,965 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 22:08:20,980 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:08:20,980 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2018-11-22 22:08:20,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-22 22:08:20,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-22 22:08:20,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2018-11-22 22:08:20,981 INFO L87 Difference]: Start difference. First operand 377 states and 888 transitions. Second operand 13 states. [2018-11-22 22:08:21,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:08:21,095 INFO L93 Difference]: Finished difference Result 642 states and 1467 transitions. [2018-11-22 22:08:21,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-22 22:08:21,096 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2018-11-22 22:08:21,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:08:21,097 INFO L225 Difference]: With dead ends: 642 [2018-11-22 22:08:21,097 INFO L226 Difference]: Without dead ends: 511 [2018-11-22 22:08:21,098 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=145, Invalid=317, Unknown=0, NotChecked=0, Total=462 [2018-11-22 22:08:21,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2018-11-22 22:08:21,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 511. [2018-11-22 22:08:21,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 511 states. [2018-11-22 22:08:21,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 1156 transitions. [2018-11-22 22:08:21,105 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 1156 transitions. Word has length 49 [2018-11-22 22:08:21,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:08:21,105 INFO L480 AbstractCegarLoop]: Abstraction has 511 states and 1156 transitions. [2018-11-22 22:08:21,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-22 22:08:21,105 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 1156 transitions. [2018-11-22 22:08:21,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-11-22 22:08:21,106 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:08:21,106 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 22:08:21,110 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:08:21,110 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:08:21,110 INFO L82 PathProgramCache]: Analyzing trace with hash 925155023, now seen corresponding path program 11 times [2018-11-22 22:08:21,110 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:08:21,110 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:08:21,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:08:21,112 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:08:21,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:08:21,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:08:21,207 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 22:08:21,207 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:08:21,207 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a63e409a-aa1e-4acd-8ff1-792e7d3d4eef/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 22:08:21,223 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-22 22:08:21,250 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2018-11-22 22:08:21,250 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:08:21,252 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:08:21,286 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 22:08:21,301 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:08:21,301 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2018-11-22 22:08:21,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-22 22:08:21,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-22 22:08:21,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2018-11-22 22:08:21,302 INFO L87 Difference]: Start difference. First operand 511 states and 1156 transitions. Second operand 14 states. [2018-11-22 22:08:21,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:08:21,420 INFO L93 Difference]: Finished difference Result 658 states and 1499 transitions. [2018-11-22 22:08:21,420 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-22 22:08:21,421 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 53 [2018-11-22 22:08:21,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:08:21,422 INFO L225 Difference]: With dead ends: 658 [2018-11-22 22:08:21,422 INFO L226 Difference]: Without dead ends: 527 [2018-11-22 22:08:21,422 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=154, Invalid=352, Unknown=0, NotChecked=0, Total=506 [2018-11-22 22:08:21,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2018-11-22 22:08:21,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 393. [2018-11-22 22:08:21,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 393 states. [2018-11-22 22:08:21,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 920 transitions. [2018-11-22 22:08:21,427 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 920 transitions. Word has length 53 [2018-11-22 22:08:21,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:08:21,427 INFO L480 AbstractCegarLoop]: Abstraction has 393 states and 920 transitions. [2018-11-22 22:08:21,427 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-22 22:08:21,427 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 920 transitions. [2018-11-22 22:08:21,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-11-22 22:08:21,428 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:08:21,428 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 22:08:21,428 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:08:21,428 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:08:21,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1389448231, now seen corresponding path program 12 times [2018-11-22 22:08:21,429 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:08:21,429 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:08:21,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:08:21,430 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:08:21,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:08:21,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:08:21,489 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 22:08:21,489 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:08:21,489 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a63e409a-aa1e-4acd-8ff1-792e7d3d4eef/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 22:08:21,503 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-22 22:08:21,528 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-11-22 22:08:21,528 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:08:21,529 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:08:21,548 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 22:08:21,563 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:08:21,563 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2018-11-22 22:08:21,564 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-22 22:08:21,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-22 22:08:21,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2018-11-22 22:08:21,564 INFO L87 Difference]: Start difference. First operand 393 states and 920 transitions. Second operand 14 states. [2018-11-22 22:08:21,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:08:21,691 INFO L93 Difference]: Finished difference Result 674 states and 1531 transitions. [2018-11-22 22:08:21,691 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-22 22:08:21,691 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 53 [2018-11-22 22:08:21,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:08:21,692 INFO L225 Difference]: With dead ends: 674 [2018-11-22 22:08:21,692 INFO L226 Difference]: Without dead ends: 543 [2018-11-22 22:08:21,692 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2018-11-22 22:08:21,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2018-11-22 22:08:21,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 543. [2018-11-22 22:08:21,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 543 states. [2018-11-22 22:08:21,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 1220 transitions. [2018-11-22 22:08:21,698 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 1220 transitions. Word has length 53 [2018-11-22 22:08:21,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:08:21,698 INFO L480 AbstractCegarLoop]: Abstraction has 543 states and 1220 transitions. [2018-11-22 22:08:21,698 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-22 22:08:21,698 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 1220 transitions. [2018-11-22 22:08:21,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-11-22 22:08:21,699 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:08:21,699 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 22:08:21,699 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:08:21,699 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:08:21,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1832076564, now seen corresponding path program 13 times [2018-11-22 22:08:21,699 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:08:21,700 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:08:21,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:08:21,701 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:08:21,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:08:21,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:08:21,791 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 22:08:21,791 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:08:21,792 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a63e409a-aa1e-4acd-8ff1-792e7d3d4eef/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 22:08:21,800 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 22:08:21,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:08:21,821 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:08:21,849 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 22:08:21,874 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:08:21,875 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2018-11-22 22:08:21,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-22 22:08:21,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-22 22:08:21,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2018-11-22 22:08:21,875 INFO L87 Difference]: Start difference. First operand 543 states and 1220 transitions. Second operand 15 states. [2018-11-22 22:08:22,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:08:22,022 INFO L93 Difference]: Finished difference Result 690 states and 1563 transitions. [2018-11-22 22:08:22,022 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-22 22:08:22,022 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 57 [2018-11-22 22:08:22,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:08:22,023 INFO L225 Difference]: With dead ends: 690 [2018-11-22 22:08:22,023 INFO L226 Difference]: Without dead ends: 559 [2018-11-22 22:08:22,024 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 22:08:22,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2018-11-22 22:08:22,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 409. [2018-11-22 22:08:22,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 409 states. [2018-11-22 22:08:22,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 952 transitions. [2018-11-22 22:08:22,029 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 952 transitions. Word has length 57 [2018-11-22 22:08:22,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:08:22,029 INFO L480 AbstractCegarLoop]: Abstraction has 409 states and 952 transitions. [2018-11-22 22:08:22,029 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-22 22:08:22,029 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 952 transitions. [2018-11-22 22:08:22,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-11-22 22:08:22,030 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:08:22,030 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 22:08:22,030 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:08:22,030 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:08:22,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1590124650, now seen corresponding path program 14 times [2018-11-22 22:08:22,030 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:08:22,030 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:08:22,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:08:22,032 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 22:08:22,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:08:22,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:08:22,106 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 22:08:22,107 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:08:22,107 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a63e409a-aa1e-4acd-8ff1-792e7d3d4eef/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 22:08:22,122 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-22 22:08:22,138 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-22 22:08:22,138 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:08:22,139 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:08:22,167 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 22:08:22,182 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:08:22,182 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2018-11-22 22:08:22,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-22 22:08:22,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-22 22:08:22,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2018-11-22 22:08:22,183 INFO L87 Difference]: Start difference. First operand 409 states and 952 transitions. Second operand 15 states. [2018-11-22 22:08:22,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:08:22,312 INFO L93 Difference]: Finished difference Result 706 states and 1595 transitions. [2018-11-22 22:08:22,312 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-22 22:08:22,313 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 57 [2018-11-22 22:08:22,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:08:22,314 INFO L225 Difference]: With dead ends: 706 [2018-11-22 22:08:22,314 INFO L226 Difference]: Without dead ends: 575 [2018-11-22 22:08:22,314 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=466, Unknown=0, NotChecked=0, Total=650 [2018-11-22 22:08:22,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2018-11-22 22:08:22,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 575. [2018-11-22 22:08:22,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 575 states. [2018-11-22 22:08:22,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 1284 transitions. [2018-11-22 22:08:22,319 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 1284 transitions. Word has length 57 [2018-11-22 22:08:22,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:08:22,320 INFO L480 AbstractCegarLoop]: Abstraction has 575 states and 1284 transitions. [2018-11-22 22:08:22,320 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-22 22:08:22,320 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 1284 transitions. [2018-11-22 22:08:22,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-11-22 22:08:22,321 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:08:22,321 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 22:08:22,321 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:08:22,321 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:08:22,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1110697135, now seen corresponding path program 15 times [2018-11-22 22:08:22,321 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:08:22,321 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:08:22,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:08:22,323 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:08:22,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:08:22,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:08:22,399 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 22:08:22,400 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:08:22,400 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a63e409a-aa1e-4acd-8ff1-792e7d3d4eef/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 22:08:22,407 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-22 22:08:22,422 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-11-22 22:08:22,422 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:08:22,424 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:08:22,444 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 22:08:22,459 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:08:22,459 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2018-11-22 22:08:22,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-22 22:08:22,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-22 22:08:22,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2018-11-22 22:08:22,459 INFO L87 Difference]: Start difference. First operand 575 states and 1284 transitions. Second operand 16 states. [2018-11-22 22:08:22,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:08:22,594 INFO L93 Difference]: Finished difference Result 722 states and 1627 transitions. [2018-11-22 22:08:22,595 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-22 22:08:22,595 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 61 [2018-11-22 22:08:22,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:08:22,597 INFO L225 Difference]: With dead ends: 722 [2018-11-22 22:08:22,597 INFO L226 Difference]: Without dead ends: 591 [2018-11-22 22:08:22,598 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2018-11-22 22:08:22,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2018-11-22 22:08:22,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 425. [2018-11-22 22:08:22,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 425 states. [2018-11-22 22:08:22,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 984 transitions. [2018-11-22 22:08:22,604 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 984 transitions. Word has length 61 [2018-11-22 22:08:22,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:08:22,605 INFO L480 AbstractCegarLoop]: Abstraction has 425 states and 984 transitions. [2018-11-22 22:08:22,605 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-22 22:08:22,605 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 984 transitions. [2018-11-22 22:08:22,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-11-22 22:08:22,605 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:08:22,606 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 22:08:22,606 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:08:22,606 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:08:22,606 INFO L82 PathProgramCache]: Analyzing trace with hash -21031161, now seen corresponding path program 16 times [2018-11-22 22:08:22,606 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:08:22,606 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:08:22,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:08:22,608 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:08:22,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:08:22,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:08:22,684 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 22:08:22,684 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:08:22,684 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a63e409a-aa1e-4acd-8ff1-792e7d3d4eef/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 22:08:22,691 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-22 22:08:22,704 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-22 22:08:22,704 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:08:22,705 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:08:22,718 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 22:08:22,733 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:08:22,733 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2018-11-22 22:08:22,733 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-22 22:08:22,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-22 22:08:22,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2018-11-22 22:08:22,734 INFO L87 Difference]: Start difference. First operand 425 states and 984 transitions. Second operand 16 states. [2018-11-22 22:08:22,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:08:22,873 INFO L93 Difference]: Finished difference Result 738 states and 1659 transitions. [2018-11-22 22:08:22,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-22 22:08:22,873 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 61 [2018-11-22 22:08:22,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:08:22,875 INFO L225 Difference]: With dead ends: 738 [2018-11-22 22:08:22,875 INFO L226 Difference]: Without dead ends: 607 [2018-11-22 22:08:22,875 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2018-11-22 22:08:22,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2018-11-22 22:08:22,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 607. [2018-11-22 22:08:22,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 607 states. [2018-11-22 22:08:22,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 1348 transitions. [2018-11-22 22:08:22,881 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 1348 transitions. Word has length 61 [2018-11-22 22:08:22,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:08:22,881 INFO L480 AbstractCegarLoop]: Abstraction has 607 states and 1348 transitions. [2018-11-22 22:08:22,881 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-22 22:08:22,881 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 1348 transitions. [2018-11-22 22:08:22,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-11-22 22:08:22,882 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:08:22,883 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 22:08:22,883 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:08:22,883 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:08:22,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1810501428, now seen corresponding path program 17 times [2018-11-22 22:08:22,883 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:08:22,883 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:08:22,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:08:22,885 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:08:22,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:08:22,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:08:22,961 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 22:08:22,961 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:08:22,961 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a63e409a-aa1e-4acd-8ff1-792e7d3d4eef/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 22:08:22,969 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-22 22:08:22,987 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-11-22 22:08:22,987 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:08:22,988 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:08:23,022 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 22:08:23,037 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:08:23,037 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2018-11-22 22:08:23,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-22 22:08:23,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-22 22:08:23,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2018-11-22 22:08:23,037 INFO L87 Difference]: Start difference. First operand 607 states and 1348 transitions. Second operand 17 states. [2018-11-22 22:08:23,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:08:23,193 INFO L93 Difference]: Finished difference Result 754 states and 1691 transitions. [2018-11-22 22:08:23,193 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-11-22 22:08:23,193 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 65 [2018-11-22 22:08:23,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:08:23,194 INFO L225 Difference]: With dead ends: 754 [2018-11-22 22:08:23,195 INFO L226 Difference]: Without dead ends: 623 [2018-11-22 22:08:23,195 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=262, Invalid=608, Unknown=0, NotChecked=0, Total=870 [2018-11-22 22:08:23,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2018-11-22 22:08:23,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 441. [2018-11-22 22:08:23,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 441 states. [2018-11-22 22:08:23,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 1016 transitions. [2018-11-22 22:08:23,200 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 1016 transitions. Word has length 65 [2018-11-22 22:08:23,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:08:23,200 INFO L480 AbstractCegarLoop]: Abstraction has 441 states and 1016 transitions. [2018-11-22 22:08:23,201 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-22 22:08:23,201 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 1016 transitions. [2018-11-22 22:08:23,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-11-22 22:08:23,201 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:08:23,201 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 22:08:23,201 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:08:23,201 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:08:23,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1997847370, now seen corresponding path program 18 times [2018-11-22 22:08:23,202 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:08:23,202 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:08:23,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:08:23,203 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:08:23,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:08:23,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:08:23,325 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 22:08:23,325 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:08:23,325 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a63e409a-aa1e-4acd-8ff1-792e7d3d4eef/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 22:08:23,340 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-22 22:08:23,357 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-11-22 22:08:23,358 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:08:23,359 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:08:23,411 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 22:08:23,427 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:08:23,427 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2018-11-22 22:08:23,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-22 22:08:23,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-22 22:08:23,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2018-11-22 22:08:23,428 INFO L87 Difference]: Start difference. First operand 441 states and 1016 transitions. Second operand 17 states. [2018-11-22 22:08:23,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:08:23,676 INFO L93 Difference]: Finished difference Result 770 states and 1723 transitions. [2018-11-22 22:08:23,676 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-11-22 22:08:23,677 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 65 [2018-11-22 22:08:23,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:08:23,678 INFO L225 Difference]: With dead ends: 770 [2018-11-22 22:08:23,678 INFO L226 Difference]: Without dead ends: 639 [2018-11-22 22:08:23,679 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=245, Invalid=625, Unknown=0, NotChecked=0, Total=870 [2018-11-22 22:08:23,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2018-11-22 22:08:23,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 639. [2018-11-22 22:08:23,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 639 states. [2018-11-22 22:08:23,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 1412 transitions. [2018-11-22 22:08:23,686 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 1412 transitions. Word has length 65 [2018-11-22 22:08:23,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:08:23,686 INFO L480 AbstractCegarLoop]: Abstraction has 639 states and 1412 transitions. [2018-11-22 22:08:23,686 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-22 22:08:23,686 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 1412 transitions. [2018-11-22 22:08:23,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-11-22 22:08:23,687 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:08:23,687 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 22:08:23,687 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:08:23,688 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:08:23,688 INFO L82 PathProgramCache]: Analyzing trace with hash 1848584847, now seen corresponding path program 19 times [2018-11-22 22:08:23,688 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:08:23,688 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:08:23,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:08:23,689 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:08:23,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:08:23,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:08:23,805 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 22:08:23,806 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:08:23,806 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a63e409a-aa1e-4acd-8ff1-792e7d3d4eef/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 22:08:23,815 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 22:08:23,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:08:23,831 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:08:23,857 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 22:08:23,876 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:08:23,876 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2018-11-22 22:08:23,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-22 22:08:23,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-22 22:08:23,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2018-11-22 22:08:23,877 INFO L87 Difference]: Start difference. First operand 639 states and 1412 transitions. Second operand 18 states. [2018-11-22 22:08:24,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:08:24,060 INFO L93 Difference]: Finished difference Result 786 states and 1755 transitions. [2018-11-22 22:08:24,060 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-11-22 22:08:24,060 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 69 [2018-11-22 22:08:24,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:08:24,061 INFO L225 Difference]: With dead ends: 786 [2018-11-22 22:08:24,061 INFO L226 Difference]: Without dead ends: 655 [2018-11-22 22:08:24,062 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=282, Invalid=648, Unknown=0, NotChecked=0, Total=930 [2018-11-22 22:08:24,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2018-11-22 22:08:24,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 457. [2018-11-22 22:08:24,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 457 states. [2018-11-22 22:08:24,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 1048 transitions. [2018-11-22 22:08:24,066 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 1048 transitions. Word has length 69 [2018-11-22 22:08:24,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:08:24,066 INFO L480 AbstractCegarLoop]: Abstraction has 457 states and 1048 transitions. [2018-11-22 22:08:24,066 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-22 22:08:24,066 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 1048 transitions. [2018-11-22 22:08:24,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-11-22 22:08:24,067 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:08:24,067 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 22:08:24,067 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:08:24,067 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:08:24,067 INFO L82 PathProgramCache]: Analyzing trace with hash 690225639, now seen corresponding path program 20 times [2018-11-22 22:08:24,067 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:08:24,067 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:08:24,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:08:24,069 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 22:08:24,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:08:24,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:08:24,162 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 22:08:24,163 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:08:24,163 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a63e409a-aa1e-4acd-8ff1-792e7d3d4eef/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 22:08:24,170 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-22 22:08:24,183 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-22 22:08:24,183 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:08:24,184 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:08:24,214 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 22:08:24,232 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:08:24,232 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2018-11-22 22:08:24,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-22 22:08:24,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-22 22:08:24,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2018-11-22 22:08:24,233 INFO L87 Difference]: Start difference. First operand 457 states and 1048 transitions. Second operand 18 states. [2018-11-22 22:08:24,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:08:24,393 INFO L93 Difference]: Finished difference Result 802 states and 1787 transitions. [2018-11-22 22:08:24,393 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-22 22:08:24,393 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 69 [2018-11-22 22:08:24,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:08:24,394 INFO L225 Difference]: With dead ends: 802 [2018-11-22 22:08:24,395 INFO L226 Difference]: Without dead ends: 671 [2018-11-22 22:08:24,395 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=298, Invalid=694, Unknown=0, NotChecked=0, Total=992 [2018-11-22 22:08:24,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2018-11-22 22:08:24,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 671. [2018-11-22 22:08:24,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 671 states. [2018-11-22 22:08:24,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 1476 transitions. [2018-11-22 22:08:24,400 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 1476 transitions. Word has length 69 [2018-11-22 22:08:24,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:08:24,400 INFO L480 AbstractCegarLoop]: Abstraction has 671 states and 1476 transitions. [2018-11-22 22:08:24,400 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-22 22:08:24,400 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 1476 transitions. [2018-11-22 22:08:24,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-11-22 22:08:24,401 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:08:24,401 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 22:08:24,401 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:08:24,401 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:08:24,401 INFO L82 PathProgramCache]: Analyzing trace with hash 591087276, now seen corresponding path program 21 times [2018-11-22 22:08:24,401 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:08:24,401 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:08:24,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:08:24,403 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:08:24,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:08:24,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:08:24,546 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 22:08:24,546 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:08:24,546 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a63e409a-aa1e-4acd-8ff1-792e7d3d4eef/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 22:08:24,554 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-22 22:08:24,571 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-11-22 22:08:24,571 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:08:24,573 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:08:24,594 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 22:08:24,609 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:08:24,609 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2018-11-22 22:08:24,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-11-22 22:08:24,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-11-22 22:08:24,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2018-11-22 22:08:24,609 INFO L87 Difference]: Start difference. First operand 671 states and 1476 transitions. Second operand 19 states. [2018-11-22 22:08:24,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:08:24,795 INFO L93 Difference]: Finished difference Result 818 states and 1819 transitions. [2018-11-22 22:08:24,795 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-11-22 22:08:24,795 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 73 [2018-11-22 22:08:24,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:08:24,796 INFO L225 Difference]: With dead ends: 818 [2018-11-22 22:08:24,796 INFO L226 Difference]: Without dead ends: 687 [2018-11-22 22:08:24,797 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 22:08:24,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2018-11-22 22:08:24,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 473. [2018-11-22 22:08:24,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 473 states. [2018-11-22 22:08:24,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 1080 transitions. [2018-11-22 22:08:24,802 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 1080 transitions. Word has length 73 [2018-11-22 22:08:24,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:08:24,802 INFO L480 AbstractCegarLoop]: Abstraction has 473 states and 1080 transitions. [2018-11-22 22:08:24,802 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-11-22 22:08:24,802 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 1080 transitions. [2018-11-22 22:08:24,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-11-22 22:08:24,802 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:08:24,802 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 22:08:24,802 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:08:24,802 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:08:24,802 INFO L82 PathProgramCache]: Analyzing trace with hash -1119275478, now seen corresponding path program 22 times [2018-11-22 22:08:24,803 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:08:24,803 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:08:24,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:08:24,804 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:08:24,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:08:24,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:08:24,927 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 22:08:24,927 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:08:24,927 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a63e409a-aa1e-4acd-8ff1-792e7d3d4eef/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 22:08:24,935 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-22 22:08:24,950 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-22 22:08:24,950 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:08:24,951 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:08:24,971 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 22:08:24,986 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:08:24,986 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2018-11-22 22:08:24,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-11-22 22:08:24,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-11-22 22:08:24,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2018-11-22 22:08:24,987 INFO L87 Difference]: Start difference. First operand 473 states and 1080 transitions. Second operand 19 states. [2018-11-22 22:08:25,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:08:25,180 INFO L93 Difference]: Finished difference Result 834 states and 1851 transitions. [2018-11-22 22:08:25,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-11-22 22:08:25,180 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 73 [2018-11-22 22:08:25,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:08:25,182 INFO L225 Difference]: With dead ends: 834 [2018-11-22 22:08:25,182 INFO L226 Difference]: Without dead ends: 703 [2018-11-22 22:08:25,182 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=349, Invalid=773, Unknown=0, NotChecked=0, Total=1122 [2018-11-22 22:08:25,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2018-11-22 22:08:25,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 703. [2018-11-22 22:08:25,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 703 states. [2018-11-22 22:08:25,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 1540 transitions. [2018-11-22 22:08:25,187 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 1540 transitions. Word has length 73 [2018-11-22 22:08:25,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:08:25,187 INFO L480 AbstractCegarLoop]: Abstraction has 703 states and 1540 transitions. [2018-11-22 22:08:25,187 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-11-22 22:08:25,188 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 1540 transitions. [2018-11-22 22:08:25,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-11-22 22:08:25,188 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:08:25,189 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 22:08:25,189 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:08:25,189 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:08:25,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1661562769, now seen corresponding path program 23 times [2018-11-22 22:08:25,189 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:08:25,189 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:08:25,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:08:25,190 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:08:25,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:08:25,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:08:25,295 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 22:08:25,295 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:08:25,295 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a63e409a-aa1e-4acd-8ff1-792e7d3d4eef/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 22:08:25,302 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-22 22:08:25,318 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-11-22 22:08:25,318 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:08:25,319 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:08:25,338 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 22:08:25,363 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:08:25,363 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2018-11-22 22:08:25,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-22 22:08:25,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-22 22:08:25,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2018-11-22 22:08:25,364 INFO L87 Difference]: Start difference. First operand 703 states and 1540 transitions. Second operand 20 states. [2018-11-22 22:08:25,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:08:25,569 INFO L93 Difference]: Finished difference Result 850 states and 1883 transitions. [2018-11-22 22:08:25,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-11-22 22:08:25,569 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 77 [2018-11-22 22:08:25,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:08:25,571 INFO L225 Difference]: With dead ends: 850 [2018-11-22 22:08:25,571 INFO L226 Difference]: Without dead ends: 719 [2018-11-22 22:08:25,572 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=361, Invalid=829, Unknown=0, NotChecked=0, Total=1190 [2018-11-22 22:08:25,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2018-11-22 22:08:25,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 489. [2018-11-22 22:08:25,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 489 states. [2018-11-22 22:08:25,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 1112 transitions. [2018-11-22 22:08:25,578 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 1112 transitions. Word has length 77 [2018-11-22 22:08:25,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:08:25,578 INFO L480 AbstractCegarLoop]: Abstraction has 489 states and 1112 transitions. [2018-11-22 22:08:25,578 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-22 22:08:25,578 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 1112 transitions. [2018-11-22 22:08:25,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-11-22 22:08:25,578 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:08:25,578 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 22:08:25,579 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:08:25,579 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:08:25,579 INFO L82 PathProgramCache]: Analyzing trace with hash -119534393, now seen corresponding path program 24 times [2018-11-22 22:08:25,579 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:08:25,579 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:08:25,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:08:25,580 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:08:25,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:08:25,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:08:25,724 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 22:08:25,724 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:08:25,724 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a63e409a-aa1e-4acd-8ff1-792e7d3d4eef/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 22:08:25,739 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-22 22:08:25,758 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-11-22 22:08:25,758 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:08:25,759 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:08:25,778 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 22:08:25,792 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:08:25,792 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2018-11-22 22:08:25,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-22 22:08:25,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-22 22:08:25,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2018-11-22 22:08:25,793 INFO L87 Difference]: Start difference. First operand 489 states and 1112 transitions. Second operand 20 states. [2018-11-22 22:08:25,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:08:25,979 INFO L93 Difference]: Finished difference Result 866 states and 1915 transitions. [2018-11-22 22:08:25,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-11-22 22:08:25,980 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 77 [2018-11-22 22:08:25,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:08:25,981 INFO L225 Difference]: With dead ends: 866 [2018-11-22 22:08:25,981 INFO L226 Difference]: Without dead ends: 735 [2018-11-22 22:08:25,981 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=379, Invalid=881, Unknown=0, NotChecked=0, Total=1260 [2018-11-22 22:08:25,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2018-11-22 22:08:25,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 735. [2018-11-22 22:08:25,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 735 states. [2018-11-22 22:08:25,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 1604 transitions. [2018-11-22 22:08:25,986 INFO L78 Accepts]: Start accepts. Automaton has 735 states and 1604 transitions. Word has length 77 [2018-11-22 22:08:25,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:08:25,987 INFO L480 AbstractCegarLoop]: Abstraction has 735 states and 1604 transitions. [2018-11-22 22:08:25,987 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-22 22:08:25,987 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states and 1604 transitions. [2018-11-22 22:08:25,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-11-22 22:08:25,987 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:08:25,987 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 22:08:25,988 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:08:25,988 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:08:25,988 INFO L82 PathProgramCache]: Analyzing trace with hash 840744076, now seen corresponding path program 25 times [2018-11-22 22:08:25,988 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:08:25,988 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:08:25,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:08:25,989 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:08:25,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:08:25,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:08:26,117 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 22:08:26,118 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:08:26,118 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a63e409a-aa1e-4acd-8ff1-792e7d3d4eef/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 22:08:26,125 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 22:08:26,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:08:26,139 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:08:26,155 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 22:08:26,169 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:08:26,169 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2018-11-22 22:08:26,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-22 22:08:26,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-22 22:08:26,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2018-11-22 22:08:26,170 INFO L87 Difference]: Start difference. First operand 735 states and 1604 transitions. Second operand 21 states. [2018-11-22 22:08:26,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:08:26,378 INFO L93 Difference]: Finished difference Result 882 states and 1947 transitions. [2018-11-22 22:08:26,378 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-11-22 22:08:26,378 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 81 [2018-11-22 22:08:26,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:08:26,380 INFO L225 Difference]: With dead ends: 882 [2018-11-22 22:08:26,380 INFO L226 Difference]: Without dead ends: 751 [2018-11-22 22:08:26,381 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 22:08:26,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2018-11-22 22:08:26,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 505. [2018-11-22 22:08:26,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 505 states. [2018-11-22 22:08:26,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 1144 transitions. [2018-11-22 22:08:26,386 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 1144 transitions. Word has length 81 [2018-11-22 22:08:26,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:08:26,386 INFO L480 AbstractCegarLoop]: Abstraction has 505 states and 1144 transitions. [2018-11-22 22:08:26,386 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-22 22:08:26,386 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 1144 transitions. [2018-11-22 22:08:26,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-11-22 22:08:26,386 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:08:26,387 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 22:08:26,387 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:08:26,387 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:08:26,387 INFO L82 PathProgramCache]: Analyzing trace with hash -398143222, now seen corresponding path program 26 times [2018-11-22 22:08:26,387 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:08:26,387 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:08:26,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:08:26,388 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 22:08:26,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:08:26,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:08:26,503 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 22:08:26,503 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:08:26,503 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a63e409a-aa1e-4acd-8ff1-792e7d3d4eef/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 22:08:26,515 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-22 22:08:26,534 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-22 22:08:26,534 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:08:26,537 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:08:26,563 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 22:08:26,578 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:08:26,578 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2018-11-22 22:08:26,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-22 22:08:26,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-22 22:08:26,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2018-11-22 22:08:26,579 INFO L87 Difference]: Start difference. First operand 505 states and 1144 transitions. Second operand 21 states. [2018-11-22 22:08:26,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:08:26,797 INFO L93 Difference]: Finished difference Result 898 states and 1979 transitions. [2018-11-22 22:08:26,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-11-22 22:08:26,797 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 81 [2018-11-22 22:08:26,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:08:26,798 INFO L225 Difference]: With dead ends: 898 [2018-11-22 22:08:26,798 INFO L226 Difference]: Without dead ends: 767 [2018-11-22 22:08:26,799 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=394, Invalid=1012, Unknown=0, NotChecked=0, Total=1406 [2018-11-22 22:08:26,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2018-11-22 22:08:26,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 767. [2018-11-22 22:08:26,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 767 states. [2018-11-22 22:08:26,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 767 states to 767 states and 1668 transitions. [2018-11-22 22:08:26,804 INFO L78 Accepts]: Start accepts. Automaton has 767 states and 1668 transitions. Word has length 81 [2018-11-22 22:08:26,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:08:26,804 INFO L480 AbstractCegarLoop]: Abstraction has 767 states and 1668 transitions. [2018-11-22 22:08:26,804 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-22 22:08:26,804 INFO L276 IsEmpty]: Start isEmpty. Operand 767 states and 1668 transitions. [2018-11-22 22:08:26,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-11-22 22:08:26,805 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:08:26,805 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 22:08:26,805 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:08:26,805 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:08:26,805 INFO L82 PathProgramCache]: Analyzing trace with hash -798353841, now seen corresponding path program 27 times [2018-11-22 22:08:26,805 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:08:26,805 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:08:26,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:08:26,806 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:08:26,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:08:26,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:08:26,946 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 22:08:26,947 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:08:26,947 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a63e409a-aa1e-4acd-8ff1-792e7d3d4eef/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 22:08:26,954 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-22 22:08:26,973 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-11-22 22:08:26,973 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:08:26,975 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:08:26,991 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 22:08:27,006 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:08:27,006 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2018-11-22 22:08:27,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-11-22 22:08:27,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-11-22 22:08:27,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2018-11-22 22:08:27,007 INFO L87 Difference]: Start difference. First operand 767 states and 1668 transitions. Second operand 22 states. [2018-11-22 22:08:27,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:08:27,238 INFO L93 Difference]: Finished difference Result 914 states and 2011 transitions. [2018-11-22 22:08:27,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-11-22 22:08:27,239 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 85 [2018-11-22 22:08:27,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:08:27,240 INFO L225 Difference]: With dead ends: 914 [2018-11-22 22:08:27,240 INFO L226 Difference]: Without dead ends: 783 [2018-11-22 22:08:27,240 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=443, Invalid=1117, Unknown=0, NotChecked=0, Total=1560 [2018-11-22 22:08:27,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2018-11-22 22:08:27,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 521. [2018-11-22 22:08:27,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 521 states. [2018-11-22 22:08:27,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 1176 transitions. [2018-11-22 22:08:27,245 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 1176 transitions. Word has length 85 [2018-11-22 22:08:27,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:08:27,245 INFO L480 AbstractCegarLoop]: Abstraction has 521 states and 1176 transitions. [2018-11-22 22:08:27,245 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-11-22 22:08:27,245 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 1176 transitions. [2018-11-22 22:08:27,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-11-22 22:08:27,245 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:08:27,245 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 22:08:27,245 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:08:27,246 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:08:27,246 INFO L82 PathProgramCache]: Analyzing trace with hash -1261226073, now seen corresponding path program 28 times [2018-11-22 22:08:27,246 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:08:27,246 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:08:27,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:08:27,247 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:08:27,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:08:27,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:08:27,379 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 22:08:27,379 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:08:27,380 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a63e409a-aa1e-4acd-8ff1-792e7d3d4eef/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 22:08:27,399 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-22 22:08:27,417 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-22 22:08:27,417 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:08:27,419 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:08:27,449 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 22:08:27,463 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:08:27,463 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2018-11-22 22:08:27,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-11-22 22:08:27,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-11-22 22:08:27,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2018-11-22 22:08:27,464 INFO L87 Difference]: Start difference. First operand 521 states and 1176 transitions. Second operand 22 states. [2018-11-22 22:08:27,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:08:27,693 INFO L93 Difference]: Finished difference Result 930 states and 2043 transitions. [2018-11-22 22:08:27,693 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-11-22 22:08:27,693 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 85 [2018-11-22 22:08:27,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:08:27,695 INFO L225 Difference]: With dead ends: 930 [2018-11-22 22:08:27,695 INFO L226 Difference]: Without dead ends: 799 [2018-11-22 22:08:27,696 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=470, Invalid=1090, Unknown=0, NotChecked=0, Total=1560 [2018-11-22 22:08:27,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2018-11-22 22:08:27,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 799. [2018-11-22 22:08:27,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 799 states. [2018-11-22 22:08:27,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 1732 transitions. [2018-11-22 22:08:27,702 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 1732 transitions. Word has length 85 [2018-11-22 22:08:27,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:08:27,702 INFO L480 AbstractCegarLoop]: Abstraction has 799 states and 1732 transitions. [2018-11-22 22:08:27,702 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-11-22 22:08:27,702 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 1732 transitions. [2018-11-22 22:08:27,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-11-22 22:08:27,703 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:08:27,703 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 22:08:27,703 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:08:27,703 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:08:27,704 INFO L82 PathProgramCache]: Analyzing trace with hash -761638292, now seen corresponding path program 29 times [2018-11-22 22:08:27,704 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:08:27,704 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:08:27,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:08:27,705 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:08:27,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:08:27,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:08:27,831 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 22:08:27,831 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:08:27,831 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a63e409a-aa1e-4acd-8ff1-792e7d3d4eef/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 22:08:27,838 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-22 22:08:27,856 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-11-22 22:08:27,857 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:08:27,858 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:08:27,874 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 22:08:27,889 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:08:27,890 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2018-11-22 22:08:27,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-11-22 22:08:27,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-11-22 22:08:27,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2018-11-22 22:08:27,890 INFO L87 Difference]: Start difference. First operand 799 states and 1732 transitions. Second operand 23 states. [2018-11-22 22:08:28,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:08:28,202 INFO L93 Difference]: Finished difference Result 946 states and 2075 transitions. [2018-11-22 22:08:28,202 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-11-22 22:08:28,202 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 89 [2018-11-22 22:08:28,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:08:28,204 INFO L225 Difference]: With dead ends: 946 [2018-11-22 22:08:28,204 INFO L226 Difference]: Without dead ends: 815 [2018-11-22 22:08:28,204 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 22:08:28,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 815 states. [2018-11-22 22:08:28,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 815 to 537. [2018-11-22 22:08:28,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 537 states. [2018-11-22 22:08:28,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 1208 transitions. [2018-11-22 22:08:28,212 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 1208 transitions. Word has length 89 [2018-11-22 22:08:28,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:08:28,212 INFO L480 AbstractCegarLoop]: Abstraction has 537 states and 1208 transitions. [2018-11-22 22:08:28,212 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-11-22 22:08:28,212 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 1208 transitions. [2018-11-22 22:08:28,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-11-22 22:08:28,212 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:08:28,212 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 22:08:28,213 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:08:28,213 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:08:28,213 INFO L82 PathProgramCache]: Analyzing trace with hash -823686166, now seen corresponding path program 30 times [2018-11-22 22:08:28,213 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:08:28,213 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:08:28,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:08:28,214 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:08:28,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:08:28,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:08:28,342 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 22:08:28,342 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:08:28,342 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a63e409a-aa1e-4acd-8ff1-792e7d3d4eef/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 22:08:28,353 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-22 22:08:28,373 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-11-22 22:08:28,373 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:08:28,375 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:08:28,401 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 22:08:28,416 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:08:28,416 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2018-11-22 22:08:28,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-11-22 22:08:28,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-11-22 22:08:28,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2018-11-22 22:08:28,417 INFO L87 Difference]: Start difference. First operand 537 states and 1208 transitions. Second operand 23 states. [2018-11-22 22:08:28,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:08:28,653 INFO L93 Difference]: Finished difference Result 962 states and 2107 transitions. [2018-11-22 22:08:28,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-11-22 22:08:28,653 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 89 [2018-11-22 22:08:28,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:08:28,654 INFO L225 Difference]: With dead ends: 962 [2018-11-22 22:08:28,654 INFO L226 Difference]: Without dead ends: 831 [2018-11-22 22:08:28,655 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=482, Invalid=1240, Unknown=0, NotChecked=0, Total=1722 [2018-11-22 22:08:28,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2018-11-22 22:08:28,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 831. [2018-11-22 22:08:28,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 831 states. [2018-11-22 22:08:28,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 1796 transitions. [2018-11-22 22:08:28,660 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 1796 transitions. Word has length 89 [2018-11-22 22:08:28,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:08:28,660 INFO L480 AbstractCegarLoop]: Abstraction has 831 states and 1796 transitions. [2018-11-22 22:08:28,661 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-11-22 22:08:28,661 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 1796 transitions. [2018-11-22 22:08:28,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-11-22 22:08:28,661 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:08:28,661 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 22:08:28,661 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:08:28,661 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:08:28,661 INFO L82 PathProgramCache]: Analyzing trace with hash 711572527, now seen corresponding path program 31 times [2018-11-22 22:08:28,662 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:08:28,662 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:08:28,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:08:28,662 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:08:28,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:08:28,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:08:28,814 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 22:08:28,814 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:08:28,815 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a63e409a-aa1e-4acd-8ff1-792e7d3d4eef/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 22:08:28,823 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 22:08:28,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:08:28,842 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:08:28,860 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 22:08:28,875 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:08:28,875 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2018-11-22 22:08:28,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-11-22 22:08:28,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-11-22 22:08:28,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2018-11-22 22:08:28,876 INFO L87 Difference]: Start difference. First operand 831 states and 1796 transitions. Second operand 24 states. [2018-11-22 22:08:29,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:08:29,131 INFO L93 Difference]: Finished difference Result 978 states and 2139 transitions. [2018-11-22 22:08:29,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-11-22 22:08:29,132 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 93 [2018-11-22 22:08:29,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:08:29,133 INFO L225 Difference]: With dead ends: 978 [2018-11-22 22:08:29,133 INFO L226 Difference]: Without dead ends: 847 [2018-11-22 22:08:29,134 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=549, Invalid=1257, Unknown=0, NotChecked=0, Total=1806 [2018-11-22 22:08:29,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2018-11-22 22:08:29,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 553. [2018-11-22 22:08:29,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 553 states. [2018-11-22 22:08:29,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 1240 transitions. [2018-11-22 22:08:29,139 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 1240 transitions. Word has length 93 [2018-11-22 22:08:29,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:08:29,139 INFO L480 AbstractCegarLoop]: Abstraction has 553 states and 1240 transitions. [2018-11-22 22:08:29,139 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-11-22 22:08:29,139 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 1240 transitions. [2018-11-22 22:08:29,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-11-22 22:08:29,140 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:08:29,140 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 22:08:29,140 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:08:29,140 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:08:29,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1008893305, now seen corresponding path program 32 times [2018-11-22 22:08:29,140 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:08:29,141 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:08:29,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:08:29,141 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 22:08:29,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:08:29,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:08:29,288 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 22:08:29,289 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:08:29,289 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a63e409a-aa1e-4acd-8ff1-792e7d3d4eef/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 22:08:29,298 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-22 22:08:29,316 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-22 22:08:29,316 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:08:29,318 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:08:29,350 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 22:08:29,365 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:08:29,365 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2018-11-22 22:08:29,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-11-22 22:08:29,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-11-22 22:08:29,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2018-11-22 22:08:29,375 INFO L87 Difference]: Start difference. First operand 553 states and 1240 transitions. Second operand 24 states. [2018-11-22 22:08:29,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:08:29,683 INFO L93 Difference]: Finished difference Result 994 states and 2171 transitions. [2018-11-22 22:08:29,683 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-11-22 22:08:29,683 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 93 [2018-11-22 22:08:29,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:08:29,684 INFO L225 Difference]: With dead ends: 994 [2018-11-22 22:08:29,684 INFO L226 Difference]: Without dead ends: 863 [2018-11-22 22:08:29,685 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=571, Invalid=1321, Unknown=0, NotChecked=0, Total=1892 [2018-11-22 22:08:29,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2018-11-22 22:08:29,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 863. [2018-11-22 22:08:29,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 863 states. [2018-11-22 22:08:29,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 1860 transitions. [2018-11-22 22:08:29,690 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 1860 transitions. Word has length 93 [2018-11-22 22:08:29,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:08:29,690 INFO L480 AbstractCegarLoop]: Abstraction has 863 states and 1860 transitions. [2018-11-22 22:08:29,690 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-11-22 22:08:29,690 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 1860 transitions. [2018-11-22 22:08:29,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-11-22 22:08:29,691 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:08:29,691 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 22:08:29,691 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:08:29,691 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:08:29,691 INFO L82 PathProgramCache]: Analyzing trace with hash 915671116, now seen corresponding path program 33 times [2018-11-22 22:08:29,691 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:08:29,692 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:08:29,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:08:29,692 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:08:29,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:08:29,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:08:29,845 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 22:08:29,845 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:08:29,845 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a63e409a-aa1e-4acd-8ff1-792e7d3d4eef/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 22:08:29,853 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-22 22:08:29,876 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-11-22 22:08:29,876 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:08:29,877 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:08:29,898 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 22:08:29,912 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:08:29,913 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2018-11-22 22:08:29,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-11-22 22:08:29,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-11-22 22:08:29,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2018-11-22 22:08:29,913 INFO L87 Difference]: Start difference. First operand 863 states and 1860 transitions. Second operand 25 states. [2018-11-22 22:08:30,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:08:30,199 INFO L93 Difference]: Finished difference Result 1010 states and 2203 transitions. [2018-11-22 22:08:30,199 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-11-22 22:08:30,199 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 97 [2018-11-22 22:08:30,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:08:30,201 INFO L225 Difference]: With dead ends: 1010 [2018-11-22 22:08:30,201 INFO L226 Difference]: Without dead ends: 879 [2018-11-22 22:08:30,201 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 22:08:30,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2018-11-22 22:08:30,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 569. [2018-11-22 22:08:30,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 569 states. [2018-11-22 22:08:30,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 1272 transitions. [2018-11-22 22:08:30,207 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 1272 transitions. Word has length 97 [2018-11-22 22:08:30,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:08:30,207 INFO L480 AbstractCegarLoop]: Abstraction has 569 states and 1272 transitions. [2018-11-22 22:08:30,207 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-11-22 22:08:30,207 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 1272 transitions. [2018-11-22 22:08:30,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-11-22 22:08:30,208 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:08:30,208 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 22:08:30,208 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:08:30,208 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:08:30,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1745970890, now seen corresponding path program 34 times [2018-11-22 22:08:30,209 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:08:30,209 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:08:30,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:08:30,210 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:08:30,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:08:30,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:08:30,361 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 22:08:30,361 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:08:30,361 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a63e409a-aa1e-4acd-8ff1-792e7d3d4eef/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 22:08:30,369 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-22 22:08:30,387 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-22 22:08:30,387 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:08:30,388 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:08:30,407 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 22:08:30,421 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:08:30,422 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2018-11-22 22:08:30,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-11-22 22:08:30,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-11-22 22:08:30,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2018-11-22 22:08:30,422 INFO L87 Difference]: Start difference. First operand 569 states and 1272 transitions. Second operand 25 states. [2018-11-22 22:08:30,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:08:30,692 INFO L93 Difference]: Finished difference Result 1026 states and 2235 transitions. [2018-11-22 22:08:30,693 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-11-22 22:08:30,693 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 97 [2018-11-22 22:08:30,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:08:30,694 INFO L225 Difference]: With dead ends: 1026 [2018-11-22 22:08:30,694 INFO L226 Difference]: Without dead ends: 895 [2018-11-22 22:08:30,694 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=643, Invalid=1427, Unknown=0, NotChecked=0, Total=2070 [2018-11-22 22:08:30,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2018-11-22 22:08:30,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 895. [2018-11-22 22:08:30,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 895 states. [2018-11-22 22:08:30,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 1924 transitions. [2018-11-22 22:08:30,702 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 1924 transitions. Word has length 97 [2018-11-22 22:08:30,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:08:30,702 INFO L480 AbstractCegarLoop]: Abstraction has 895 states and 1924 transitions. [2018-11-22 22:08:30,702 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-11-22 22:08:30,702 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 1924 transitions. [2018-11-22 22:08:30,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-11-22 22:08:30,703 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:08:30,703 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 22:08:30,703 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:08:30,703 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:08:30,703 INFO L82 PathProgramCache]: Analyzing trace with hash -321551857, now seen corresponding path program 35 times [2018-11-22 22:08:30,703 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:08:30,703 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:08:30,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:08:30,704 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:08:30,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:08:30,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:08:30,997 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 282 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:08:30,997 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:08:30,997 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a63e409a-aa1e-4acd-8ff1-792e7d3d4eef/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 22:08:31,007 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-22 22:08:31,037 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2018-11-22 22:08:31,037 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:08:31,039 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:08:31,068 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 343 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:08:31,082 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-22 22:08:31,082 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [23] imperfect sequences [23] total 25 [2018-11-22 22:08:31,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-11-22 22:08:31,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-11-22 22:08:31,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2018-11-22 22:08:31,083 INFO L87 Difference]: Start difference. First operand 895 states and 1924 transitions. Second operand 25 states. [2018-11-22 22:08:31,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:08:31,294 INFO L93 Difference]: Finished difference Result 3847 states and 7639 transitions. [2018-11-22 22:08:31,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-11-22 22:08:31,294 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 101 [2018-11-22 22:08:31,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:08:31,295 INFO L225 Difference]: With dead ends: 3847 [2018-11-22 22:08:31,295 INFO L226 Difference]: Without dead ends: 555 [2018-11-22 22:08:31,295 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=575, Invalid=1405, Unknown=0, NotChecked=0, Total=1980 [2018-11-22 22:08:31,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2018-11-22 22:08:31,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 555. [2018-11-22 22:08:31,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 555 states. [2018-11-22 22:08:31,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 1170 transitions. [2018-11-22 22:08:31,300 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 1170 transitions. Word has length 101 [2018-11-22 22:08:31,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:08:31,300 INFO L480 AbstractCegarLoop]: Abstraction has 555 states and 1170 transitions. [2018-11-22 22:08:31,300 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-11-22 22:08:31,300 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 1170 transitions. [2018-11-22 22:08:31,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-11-22 22:08:31,301 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:08:31,301 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 22:08:31,301 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 22:08:31,301 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:08:31,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1394676377, now seen corresponding path program 36 times [2018-11-22 22:08:31,301 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:08:31,301 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:08:31,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:08:31,302 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:08:31,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:08:31,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:08:31,488 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 315 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:08:31,488 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:08:31,488 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a63e409a-aa1e-4acd-8ff1-792e7d3d4eef/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 22:08:31,498 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-22 22:08:31,526 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2018-11-22 22:08:31,527 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:08:31,529 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:08:31,557 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 343 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:08:31,580 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-22 22:08:31,580 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [23] imperfect sequences [23] total 25 [2018-11-22 22:08:31,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-11-22 22:08:31,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-11-22 22:08:31,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2018-11-22 22:08:31,581 INFO L87 Difference]: Start difference. First operand 555 states and 1170 transitions. Second operand 25 states. [2018-11-22 22:08:31,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:08:31,773 INFO L93 Difference]: Finished difference Result 1763 states and 3205 transitions. [2018-11-22 22:08:31,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-11-22 22:08:31,773 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 101 [2018-11-22 22:08:31,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:08:31,774 INFO L225 Difference]: With dead ends: 1763 [2018-11-22 22:08:31,774 INFO L226 Difference]: Without dead ends: 0 [2018-11-22 22:08:31,774 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=575, Invalid=1405, Unknown=0, NotChecked=0, Total=1980 [2018-11-22 22:08:31,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-22 22:08:31,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-22 22:08:31,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-22 22:08:31,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-22 22:08:31,774 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 101 [2018-11-22 22:08:31,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:08:31,774 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-22 22:08:31,774 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-11-22 22:08:31,775 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-22 22:08:31,775 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-22 22:08:31,777 INFO L305 ceAbstractionStarter]: Did not count any witness invariants because Icfg is not BoogieIcfg [2018-11-22 22:08:31,779 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 10:08:31 BasicIcfg [2018-11-22 22:08:31,779 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-22 22:08:31,779 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-22 22:08:31,779 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-22 22:08:31,780 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-22 22:08:31,780 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 10:08:17" (3/4) ... [2018-11-22 22:08:31,783 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-22 22:08:31,788 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure t1 [2018-11-22 22:08:31,788 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure t2 [2018-11-22 22:08:31,791 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2018-11-22 22:08:31,791 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2018-11-22 22:08:31,791 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-22 22:08:31,816 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_a63e409a-aa1e-4acd-8ff1-792e7d3d4eef/bin-2019/uautomizer/witness.graphml [2018-11-22 22:08:31,816 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-22 22:08:31,817 INFO L168 Benchmark]: Toolchain (without parser) took 15373.01 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 368.6 MB). Free memory was 957.0 MB in the beginning and 1.0 GB in the end (delta: -79.1 MB). Peak memory consumption was 289.5 MB. Max. memory is 11.5 GB. [2018-11-22 22:08:31,818 INFO L168 Benchmark]: CDTParser took 0.14 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 22:08:31,818 INFO L168 Benchmark]: CACSL2BoogieTranslator took 386.41 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 135.8 MB). Free memory was 957.0 MB in the beginning and 1.1 GB in the end (delta: -159.5 MB). Peak memory consumption was 31.9 MB. Max. memory is 11.5 GB. [2018-11-22 22:08:31,818 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.56 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 22:08:31,818 INFO L168 Benchmark]: Boogie Preprocessor took 15.21 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: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-22 22:08:31,818 INFO L168 Benchmark]: RCFGBuilder took 228.53 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: 20.8 MB). Peak memory consumption was 20.8 MB. Max. memory is 11.5 GB. [2018-11-22 22:08:31,818 INFO L168 Benchmark]: TraceAbstraction took 14672.70 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 232.8 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 56.9 MB). Peak memory consumption was 289.7 MB. Max. memory is 11.5 GB. [2018-11-22 22:08:31,819 INFO L168 Benchmark]: Witness Printer took 37.07 ms. Allocated memory is still 1.4 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 71.1 kB). Peak memory consumption was 71.1 kB. Max. memory is 11.5 GB. [2018-11-22 22:08:31,820 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 386.41 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 135.8 MB). Free memory was 957.0 MB in the beginning and 1.1 GB in the end (delta: -159.5 MB). Peak memory consumption was 31.9 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 29.56 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. * Boogie Preprocessor took 15.21 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: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 228.53 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: 20.8 MB). Peak memory consumption was 20.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 14672.70 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 232.8 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 56.9 MB). Peak memory consumption was 289.7 MB. Max. memory is 11.5 GB. * Witness Printer took 37.07 ms. Allocated memory is still 1.4 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 71.1 kB). Peak memory consumption was 71.1 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, 14.6s OverallTime, 42 OverallIterations, 11 TraceHistogramMax, 6.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2568 SDtfs, 11547 SDslu, 16321 SDs, 0 SdLazy, 3273 SolverSat, 1681 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3588 GetRequests, 2516 SyntacticMatches, 0 SemanticMatches, 1072 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5994 ImplicationChecksByTransitivity, 8.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1012occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 42 MinimizatonAttempts, 3145 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 5.1s InterpolantComputationTime, 5031 NumberOfCodeBlocks, 5031 NumberOfCodeBlocksAsserted, 197 NumberOfCheckSat, 4951 ConstructedInterpolants, 0 QuantifiedInterpolants, 1042639 SizeOfPredicates, 564 NumberOfNonLiveVariables, 6004 ConjunctsInSsa, 683 ConjunctsInUnsatCore, 80 InterpolantComputations, 6 PerfectInterpolantSequences, 1283/9160 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...